GCC Newspaper

a68: escape %< and %> in call to sprintf

Sun, 14 Jun 2026 00:00:00 GMT

a68: escape %< and %> in call to sprintf

a68: fix type of flex.sub_offset in struct encoded_mode

Sun, 14 Jun 2026 00:00:00 GMT

a68: fix type of flex.sub_offset in struct encoded_mode

Algol 68 frontend uses preprocessor guards for standard C++ headers

Sun, 14 Jun 2026 00:00:00 GMT

The Algol 68 frontend in GCC now includes standard C++ headers using `INCLUDE_*` preprocessor definitions, improving build robustness and consistency.

AVR: lib1funcs.S: Use PC_SIZE instead of a magic number.

Sun, 14 Jun 2026 00:00:00 GMT

AVR: lib1funcs.S: Use PC_SIZE instead of a magic number.

GCOBOL improves MOVE routines and fixes negative zero handling

Sun, 14 Jun 2026 00:00:00 GMT

GCOBOL now correctly implements `MOVE COMP-3 to NumericDisplay` and resolves "negative zero" bugs resulting from truncated moves, enhancing data integrity.

Darwin driver updates for macOS 27 numbering scheme

Sun, 14 Jun 2026 00:00:00 GMT

The GCC Darwin driver now recognizes macOS 27, codenamed Golden Gate, by updating its internal version mapping to correspond to `darwin27`.

Fortran fixes double free in ASSOCIATE with allocatable character functions

Sun, 14 Jun 2026 00:00:00 GMT

GCC Fortran now prevents double-free errors when an `ASSOCIATE` construct uses an allocatable, deferred-length character function as a selector by restricting…

Add a few cases where -Wwarn-unused-but-set-variable should not warn.

Sun, 14 Jun 2026 00:00:00 GMT

Add a few cases where -Wwarn-unused-but-set-variable should not warn.

OpenRISC fixes conditional branch instruction placement

Sun, 14 Jun 2026 00:00:00 GMT

GCC for OpenRISC now correctly places `cbranchsi4` instructions by explicitly declaring its clobbering of the status register flag, preventing miscompilations…

Watermark - 917.267.9470

Sat, 13 Jun 2026 00:00:00 GMT

Watermark - 917.267.9470

C Standard library feature test macros need redesign and documentation fixes

Sat, 13 Jun 2026 00:00:00 GMT

The current design and documentation for C standard library feature test macros like `_ISOC23_SOURCE` are inaccurate and lead to confusion, requiring a new app…

A68 consolidates refs when lowering formulas

Sat, 13 Jun 2026 00:00:00 GMT

The Algol 68 front end now correctly handles references within formulas during the lowering process by consolidating operands.

a68: add assert after calling a68_lower_tree on a unit list

Sat, 13 Jun 2026 00:00:00 GMT

a68: add assert after calling a68_lower_tree on a unit list

a68: fix brackets parser diagnostics

Sat, 13 Jun 2026 00:00:00 GMT

a68: fix brackets parser diagnostics

a68: avoid coalescing of stmt_lists in a68_lower_unit_list

Sat, 13 Jun 2026 00:00:00 GMT

a68: avoid coalescing of stmt_lists in a68_lower_unit_list

a68: fix typo in a68_demangle_symbol

Sat, 13 Jun 2026 00:00:00 GMT

a68: fix typo in a68_demangle_symbol

a68: fix testsuite/algol68/execute/modules/program-1.a68

Sat, 13 Jun 2026 00:00:00 GMT

a68: fix testsuite/algol68/execute/modules/program-1.a68

Overhaul libf7/asm-defs.h for AVR

Sat, 13 Jun 2026 00:00:00 GMT

This commit refactors the AVR assembly definitions for `libf7/asm-defs.h`, introducing a new `REGNO` macro and updating existing macros to use it.

Use AE spelling for 'behavior' in install documentation

Sat, 13 Jun 2026 00:00:00 GMT

This commit updates the GCC installation documentation to use the 'behaviour' (AE) spelling instead of 'behavior' (US) for consistency.

range fold: Fix relation folding of |/& when reversed operands [PR125774]

Sat, 13 Jun 2026 00:00:00 GMT

range fold: Fix relation folding of |/& when reversed operands [PR125774]

GCC now searches for machine-prefixed tools in additional locations.

Sat, 13 Jun 2026 00:00:00 GMT

GCC's `find_a_program` function now includes machine-prefixed program names (e.g., `x86_64-linux-gnu-as`) in its search paths for cross-compilation.

Callback for `for_each_path` now indicates machine-disambiguation.

Sat, 13 Jun 2026 00:00:00 GMT

The `for_each_path` function in GCC's driver now passes a boolean flag to its callback, indicating whether the current directory in the search path is machine-…

phiopt: Fix is_factor_profitable for debug stmts [PR125776]

Sat, 13 Jun 2026 00:00:00 GMT

phiopt: Fix is_factor_profitable for debug stmts [PR125776]

Fix data type iterator for RISC-V pack RS register

Sat, 13 Jun 2026 00:00:00 GMT

This commit corrects the data type iterator used in the RISC-V `pack` instruction definition within GCC to ensure proper matching of half a target word.

GCC 15.3.1 Status Report (2026-06-12)

Fri, 12 Jun 2026 00:00:00 GMT

GCC 15.3.1 Status Report (2026-06-12)

GCC 15.3 Released

Fri, 12 Jun 2026 00:00:00 GMT

GCC 15.3 Released

IVOPTs incorrectly selects post-increment addressing for Thumb-1

Fri, 12 Jun 2026 00:00:00 GMT

IVOPTs incorrectly selects post-increment addressing for Thumb-1

SME ACLE question

Fri, 12 Jun 2026 00:00:00 GMT

SME ACLE question

AArch64 adds initial tuning model for Cortex-A320 core

Fri, 12 Jun 2026 00:00:00 GMT

GCC now includes an initial tuning model for the Arm Cortex-A320 processor, allowing for optimized code generation.

algol68: Use correct library file extension on darwin and windows

Fri, 12 Jun 2026 00:00:00 GMT

algol68: Use correct library file extension on darwin and windows

Diagnose invalid types for bitfield widths in templates

Fri, 12 Jun 2026 00:00:00 GMT

GCC's C++ front end now diagnoses invalid non-integral operand types for bit-field widths within templates, preventing later errors or ICEs.

Fortran improves OpenMP/OpenACC syntax diagnostics

Fri, 12 Jun 2026 00:00:00 GMT

Fortran OpenMP/OpenACC syntax errors now yield more informative 'Syntax error in statement' messages, improving diagnostic quality.

Fortran/OpenMP adds module support for declare mapper

Fri, 12 Jun 2026 00:00:00 GMT

The Fortran OpenMP implementation now fully supports `declare mapper` directives, allowing their definitions to be shared and resolved via modules.

IRA now allows multiple uses within an instruction

Fri, 12 Jun 2026 00:00:00 GMT

The IRA pass in GCC has been updated to correctly handle situations where a register is used multiple times within a single instruction, preventing an assertio…

IRA aligns equivalence rejection with LRA policies

Fri, 12 Jun 2026 00:00:00 GMT

The IRA pass in GCC now anticipates LRA's rejection of certain register equivalences, reducing unnecessary spilling and improving code quality for PIC.

Libgomp test ensures unique filenames with many threads

Fri, 12 Jun 2026 00:00:00 GMT

A libgomp Fortran test now uses a larger buffer to correctly handle I/O unit numbers with more digits, preventing filename collisions in multi-threaded environ…

middle-end: introduce IFN_VARYING for temporary statements [PR125597]

Fri, 12 Jun 2026 00:00:00 GMT

middle-end: introduce IFN_VARYING for temporary statements [PR125597]

OpenMP/Fortran fixes module-use renaming with declare mapper/reduction

Fri, 12 Jun 2026 00:00:00 GMT

The Fortran OpenMP implementation now correctly handles derived-type renaming when using `declare mapper` or `declare reduction` through module use.

vect: use .VARYING for early break IV [PR125597]

Fri, 12 Jun 2026 00:00:00 GMT

vect: use .VARYING for early break IV [PR125597]

vect: use .VARYING for loop iteraion mask [PR125597]

Fri, 12 Jun 2026 00:00:00 GMT

vect: use .VARYING for loop iteraion mask [PR125597]

Fold times negated into negative bitwise AND

Fri, 12 Jun 2026 00:00:00 GMT

GCC now simplifies `x * -y` to `-(x & y)` when `x` and `y` are known to be 0 or 1, improving code generation for conditional operations.

Optimize bitwise operations for signed integers to -1

Fri, 12 Jun 2026 00:00:00 GMT

GCC now simplifies `(~a) >> a` to `-1` for signed integer `a`, reducing unnecessary computations during compilation.

Weekly report - week 1

Thu, 11 Jun 2026 00:00:00 GMT

Weekly report - week 1

Supporting Device Specific Clauses

Thu, 11 Jun 2026 00:00:00 GMT

Supporting Device Specific Clauses

Amdgpu backend fixes a missing comma in register class names.

Thu, 11 Jun 2026 00:00:00 GMT

A missing comma in the `REG_CLASS_NAMES` definition for the AMDgpu backend is now corrected, fixing minor display issues in dump files.

AVR GCC adds 64-bit fixed point to double-precision conversions.

Thu, 11 Jun 2026 00:00:00 GMT

GCC for AVR now includes new functions to convert between 64-bit fixed-point numbers and 64-bit double-precision floating-point numbers.

Minor tweaks improve double-precision float conversions for AVR.

Thu, 11 Jun 2026 00:00:00 GMT

GCC's AVR backend now has slightly adjusted implementations for 64-bit unsigned and signed integer to double-precision float conversions.

Fixes too-short instruction lengths in AVR fractional output function.

Thu, 11 Jun 2026 00:00:00 GMT

GCC's AVR backend now correctly calculates instruction lengths in `avr_out_fract`, resolving a bug where sequences were too short.

Gcc Cobol improves `MOVE NumericDisplay TO COMP-3` performance.

Thu, 11 Jun 2026 00:00:00 GMT

The GCC Cobol compiler optimizes the `MOVE NumericDisplay TO COMP-3` operation, significantly improving its execution speed.

AArch64 GCC uses MOVI for low-64-bit integer SIMD constants.

Thu, 11 Jun 2026 00:00:00 GMT

GCC on AArch64 now generates more efficient code for certain 128-bit SIMD integer constants by using the `MOVI` instruction.

Test suite uses portable weak symbol scanning for Darwin C++ tests.

Thu, 11 Jun 2026 00:00:00 GMT

GCC's C++ test suite now employs portable `scan-weak` and `scan-not-weak` directives for weak symbol checks, especially on Darwin.

Gcov corrects control flow graph solving condition.

Thu, 11 Jun 2026 00:00:00 GMT

Gcov's correctness check for control flow graph solving is now fixed due to an incorrect loop condition.

Test suite now handles emulated Thread-Local Storage for C++ attribute tests.

Thu, 11 Jun 2026 00:00:00 GMT

The GCC testsuite now correctly accounts for differences in output when testing C++ thread-local storage attributes with emulated TLS.

testsuite, c++: Account for missing stong symbol aliases.

Thu, 11 Jun 2026 00:00:00 GMT

testsuite, c++: Account for missing stong symbol aliases.

GCN: Implement 'TARGET_ADDR_SPACE_ZERO_ADDRESS_VALID' [PR101484]

Thu, 11 Jun 2026 00:00:00 GMT

GCN: Implement 'TARGET_ADDR_SPACE_ZERO_ADDRESS_VALID' [PR101484]

Spill long COLLECT_GCC_OPTIONS to a response file

Thu, 11 Jun 2026 00:00:00 GMT

GCC's driver now writes excessively long `COLLECT_GCC_OPTIONS` to a temporary response file to circumvent operating system argument limits, preventing build fa…

Giving targets a say in match.pd

Wed, 10 Jun 2026 00:00:00 GMT

Giving targets a say in match.pd

LLVM FP atomic min/max variants alignment

Wed, 10 Jun 2026 00:00:00 GMT

LLVM FP atomic min/max variants alignment

`__PRETTY_FUNCTION__` now uses `cpp_translate_string` for encoding consistency.

Wed, 10 Jun 2026 00:00:00 GMT

GCC's C++ front end now uses `cpp_translate_string` for `__PRETTY_FUNCTION__` initializers, correctly handling string encoding without interpreting escape sequ…

Darwin test suite warns `ld64` on missing library paths for clean output.

Wed, 10 Jun 2026 00:00:00 GMT

The Darwin test suite now passes the `-w` flag to `ld64` to suppress warnings about missing library paths, preventing spurious test failures.

Darwin test suite now tolerates undefined symbols in pr97172-2.

Wed, 10 Jun 2026 00:00:00 GMT

GCC's test suite for Darwin now allows undefined symbols in the pr97172-2 test case to prevent spurious failures caused by the linker's default behavior.

Eliminate unused function warning from COBOL parser.

Wed, 10 Jun 2026 00:00:00 GMT

The COBOL frontend no longer builds an unused internal helper function, preventing compiler warnings or errors.

Builtin `bswap` and `bitreverse` functions improve error recovery.

Wed, 10 Jun 2026 00:00:00 GMT

GCC now includes better error recovery for `__builtin_bswapg` and `__builtin_bitreverseg` when passed invalid arguments, preventing internal compiler errors.

AArch64 test vcond_18.c is updated for consistency

Wed, 10 Jun 2026 00:00:00 GMT

GCC's AArch64 test suite received an update to align the vcond_18.c test with current compiler behavior.

Fortran OpenMP correctly handles POINTER array privatization.

Wed, 10 Jun 2026 00:00:00 GMT

Fortran `POINTER` attribute arrays with OpenMP `firstprivate` clauses now correctly maintain their association status instead of being deep-copied.

RISC-V combined sCC splitters generate new RTL nodes instead of modifying existing ones.

Wed, 10 Jun 2026 00:00:00 GMT

GCC's RISC-V backend now generates new RTL nodes for combined comparison splitters rather than modifying existing ones, preventing miscompilations.

IPA fixes a lifetime issue with hash_map in debug expression preparation.

Wed, 10 Jun 2026 00:00:00 GMT

GCC's Interprocedural Analysis (IPA) pass now correctly handles the lifetime of `hash_map` elements when preparing debug expressions, preventing potential data…

Optimization for left shifts by additions sets correct vector type

Wed, 10 Jun 2026 00:00:00 GMT

GCC's tree vectorizer now correctly handles vector types when optimizing left shifts implemented as additions, improving code generation accuracy.

GCC refines modulo range analysis for fixed quotients.

Wed, 10 Jun 2026 00:00:00 GMT

The GCC optimizer improves modulo operations by simplifying them when the division yields a constant quotient.

GCC adds Zicfilp landing pad protection for setjmp and indirect returns

Wed, 10 Jun 2026 00:00:00 GMT

GCC now inserts Zicfilp landing pad protection at call sites for `setjmp` and functions with an `indirect_return` attribute, preventing control-flow manipulati…

How is collaborating with native code handled by actual users?

Tue, 09 Jun 2026 00:00:00 GMT

How is collaborating with native code handled by actual users?

using "#line" directive breaks annotation lines of error messages

Tue, 09 Jun 2026 00:00:00 GMT

using "#line" directive breaks annotation lines of error messages

Rs6000: Add future ISA compare and swap equal AMO operations

Tue, 09 Jun 2026 00:00:00 GMT

GCC now supports new PowerPC atomic memory operations for compare-and-swap-equal, anticipating future processor features.

Ada Big_Integer package correctly handles negative exponents

Tue, 09 Jun 2026 00:00:00 GMT

The Ada Big_Integer package in GCC now correctly handles negative base values with even exponents for the exponentiation operator and preserves the sign during…

ARM Thumb-1 CBZ conditional branch tracking is fixed

Tue, 09 Jun 2026 00:00:00 GMT

GCC's ARM backend for Thumb-1 now correctly tracks condition codes for CBZ instructions, preventing redundant CMP instructions.

Typos are fixed in AVR backend comments

Tue, 09 Jun 2026 00:00:00 GMT

The GCC AVR backend received a commit fixing several minor spelling errors within its source code comments to improve readability.

Typos are fixed in AVR comments

Tue, 09 Jun 2026 00:00:00 GMT

The GCC AVR backend received a commit fixing several minor spelling errors within its source code comments.

AVR: Outsource lib1func.S's macros to asm-defs.h.

Tue, 09 Jun 2026 00:00:00 GMT

AVR: Outsource lib1func.S's macros to asm-defs.h.

COBOL COMP-3 moves now execute faster

Tue, 09 Jun 2026 00:00:00 GMT

GCC's COBOL frontend optimizes COMP-3 to COMP-3 moves by avoiding unnecessary binary conversions, directly manipulating packed-decimal bytes for improved perfo…

Fortran/OpenMP: Improve declare-reduction diagnostic

Tue, 09 Jun 2026 00:00:00 GMT

Fortran/OpenMP: Improve declare-reduction diagnostic

Add two further commits to ignored_commits, remove old ones

Tue, 09 Jun 2026 00:00:00 GMT

GCC's versioning script now ignores two new commit hashes and removes older, irrelevant ignored commits.

Pdp11-aout: Remove invalid conversion and restore build

Tue, 09 Jun 2026 00:00:00 GMT

This patch fixes a build error when cross-compiling GCC for pdp11-aout by correcting a type mismatch.

RISC-V: Track altfmt in RVV vtype state

Tue, 09 Jun 2026 00:00:00 GMT

GCC now tracks the new `altfmt` field in RISC-V Vector `vtype` state, crucial for FP8 format selection in Zvfofp8min instructions.

Libgomp.texi: Mention ROCR_VISIBLE_DEVICES in context of USM

Tue, 09 Jun 2026 00:00:00 GMT

Documentation for libgomp now clarifies the use of `ROCR_VISIBLE_DEVICES` for unified shared memory with AMD GPUs.

x86 backend now prefers MOVSBL for sign extension

Tue, 09 Jun 2026 00:00:00 GMT

GCC's i386 backend now always emits MOVSBL for QImode-to-HImode sign extensions, avoiding partial register writes and the 0x66 prefix.

RISC-V: Optimize trampoline code generation for Zicfilp

Tue, 09 Jun 2026 00:00:00 GMT

RISC-V: Optimize trampoline code generation for Zicfilp

RISC-V: Add load-to-address bypass for SiFive-7 series

Tue, 09 Jun 2026 00:00:00 GMT

RISC-V: Add load-to-address bypass for SiFive-7 series

RISC-V: Fix static rounding mode splicing for xtheadvector [PR125395]

Tue, 09 Jun 2026 00:00:00 GMT

RISC-V: Fix static rounding mode splicing for xtheadvector [PR125395]

fortran: ICE for ASSOCIATE selector that is an overloaded intrinsic operator

Tue, 09 Jun 2026 00:00:00 GMT

fortran: ICE for ASSOCIATE selector that is an overloaded intrinsic operator

C++ reflection avoids Internal Compiler Error with constructor parameters.

Tue, 09 Jun 2026 00:00:00 GMT

GCC fixes an Internal Compiler Error (ICE) that occurred when compiling C++ reflection features with debug information for constructor parameters.

libiberty, Darwin: Read dylibs too

Tue, 09 Jun 2026 00:00:00 GMT

libiberty, Darwin: Read dylibs too

Pierre-Emmanuel Patry is added to the GCC MAINTAINERS file.

Tue, 09 Jun 2026 00:00:00 GMT

Pierre-Emmanuel Patry is added to the GCC `MAINTAINERS` file, allowing them to contribute to the project.

GCC implements new Fortran warnings for unused and undefined variables.

Tue, 09 Jun 2026 00:00:00 GMT

GCC now provides new warnings for Fortran code concerning undefined variables and variables set but never used, improving code quality and catching potential e…

Giving targets a say in match.pd

Mon, 08 Jun 2026 00:00:00 GMT

Giving targets a say in match.pd

Terminology in Fortran error messages and options

Mon, 08 Jun 2026 00:00:00 GMT

Terminology in Fortran error messages and options

A68: Fix diagnostic strings in a68_attr_format_token

Mon, 08 Jun 2026 00:00:00 GMT

GCC's Algol 68 frontend now correctly uses descriptive text for attribute diagnostics, fixing a bug that showed keyword-related messages instead.

AArch64 removes from pattern name

Mon, 08 Jun 2026 00:00:00 GMT

This commit updates the instruction pattern name for AArch64 SVE vector duplication by removing a redundant suffix, reflecting a prior simplification.

Backpropagation for abnormal PHI nodes is no longer prematurely terminated.

Mon, 08 Jun 2026 00:00:00 GMT

A bug in the backpropagation pass that caused an early return for abnormal PHI nodes has been corrected.

C++: Add various missing auto_diagnostic_group sentinels

Mon, 08 Jun 2026 00:00:00 GMT

GCC's C++ frontend now includes numerous `auto_diagnostic_group` sentinels to improve diagnostic message grouping and clarity.

Doc: Regenerate tm.texi

Mon, 08 Jun 2026 00:00:00 GMT

GCC documentation's `tm.texi` file was regenerated to incorporate recent changes.

Doc: Spell "command-line option" with a dash

Mon, 08 Jun 2026 00:00:00 GMT

GCC documentation now consistently uses "command-line option" with a dash and standardizes on "option" over "flag" or "switch."

C++ no longer defines __FRACT_FBIT__

Mon, 08 Jun 2026 00:00:00 GMT

GCC's C++ front end no longer predefines the __FRACT_FBIT__ macro, fixing a bug where it was incorrectly available in C++ code.

Simplifies vec_duplicates of vec_duplicates

Mon, 08 Jun 2026 00:00:00 GMT

This commit simplifies nested `vec_duplicate` operations in GCC's RTL, folding them into a single `vec_duplicate` to improve optimization.

C: Fix up ICE with __builtin_{bswap,bitreverse}g

Mon, 08 Jun 2026 00:00:00 GMT

GCC no longer crashes when processing `__builtin_bswapg` and `__builtin_bitreverseg` with non-folded arguments.

Libstdc++: Spell command-line option with a dash

Mon, 08 Jun 2026 00:00:00 GMT

Libstdc++ documentation now consistently uses "command-line option" with a dash for improved readability.

SH removes can_create_pseudo_p check

Mon, 08 Jun 2026 00:00:00 GMT

This commit removes a redundant `can_create_pseudo_p` check from the SH backend, simplifying optab instruction definitions.

Folds (type)(minmax((wide)a, (wide)b)) to minmax(a, b)

Mon, 08 Jun 2026 00:00:00 GMT

This commit adds a new pattern to GCC's `match.pd` to fold widened min/max integer expressions back to their original types, improving optimization before vect…

Vectorization pattern for constant multiplication now correctly sets vector types.

Mon, 08 Jun 2026 00:00:00 GMT

A bug preventing correct vector type assignment for constant multiplication patterns in vectorization has been resolved.

Forward propagation now preserves alignment for LHS assignments.

Mon, 08 Jun 2026 00:00:00 GMT

A bug in forward propagation that missed updating alignment for assignments to the left-hand side has been fixed.

SCEV constant folding avoids signed overflow undefined behavior.

Mon, 08 Jun 2026 00:00:00 GMT

A latent bug in SCEV's `chrec_fold_plus_poly_poly` that could lead to signed overflow undefined behavior has been addressed.

Fortran: Prevent unnecessary mallocs and frees for parameterized derived types

Mon, 08 Jun 2026 00:00:00 GMT

GCC's Fortran front end now avoids unnecessary memory allocations and deallocations for parameterized derived types.

lra: Reloading section anchors

Mon, 08 Jun 2026 00:00:00 GMT

lra: Reloading section anchors

tree-optimization: Add bitop reduction simplifications against zero

Mon, 08 Jun 2026 00:00:00 GMT

tree-optimization: Add bitop reduction simplifications against zero

Rust: Compiling the alloc crate - Status Report 1

Sun, 07 Jun 2026 00:00:00 GMT

Rust: Compiling the alloc crate - Status Report 1

OpenMP: Fortran target constructs gain map iterator support

Sun, 07 Jun 2026 00:00:00 GMT

GCC now supports iterators in 'map' clauses of OpenMP 'target' constructs in Fortran, enabling more flexible data mapping for offloading.

OpenMP: Refactors gfc_omp_namelist to avoid iterator and mapper clashes

Sun, 07 Jun 2026 00:00:00 GMT

GCC's Fortran OpenMP implementation refactors an internal data structure to prevent naming conflicts when using both mappers and iterators.

OpenMP: Fortran target update constructs now support iterators

Sun, 07 Jun 2026 00:00:00 GMT

GCC's Fortran front-end now allows the use of iterators within the 'to' and 'from' clauses of OpenMP 'target update' directives, improving flexibility for offl…

Fortran requires MODULE prefix for separate module procedures

Sun, 07 Jun 2026 00:00:00 GMT

The Fortran compiler now correctly enforces the `MODULE` prefix for separate module procedures, preventing incorrect linking and improving diagnostic messages.

Fortran fixes regression caused by first patch

Sun, 07 Jun 2026 00:00:00 GMT

A Fortran compiler regression, linked to a previous patch, caused issues with finding virtual function tables, which is now resolved.

The GCC driver simplifies `find_a_program` and `find_a_file` functions

Sun, 07 Jun 2026 00:00:00 GMT

GCC refactors its driver code by streamlining file and program lookup functions, removing redundant parameters and logic.

Building for SH restores after bswap related changes

Sun, 07 Jun 2026 00:00:00 GMT

GCC can now build for the SuperH architecture again after bswap changes, which previously caused compile-time failures on that target.

GCC driver separates `find_a_program` from `find_a_file`

Sun, 07 Jun 2026 00:00:00 GMT

GCC refactors its driver by creating separate functions for locating programs and files, improving code organization.

Testsuite automatically adds check_function_bodies options

Sun, 07 Jun 2026 00:00:00 GMT

GCC's testsuite now automatically includes the necessary `check_function_bodies` option when a test uses the `check-function-bodies` directive, simplifying tes…

MIPS fixes uninitialized operand use in sync operations

Sun, 07 Jun 2026 00:00:00 GMT

This patch corrects uninitialized operand use in MIPS RTL templates for atomic synchronization operations, preventing incorrect code generation.

GSoC OpenACC weekly report describes parsing progress

Sat, 06 Jun 2026 00:00:00 GMT

A GSoC student provides a progress report on implementing OpenACC parsing for C, C++, and Fortran front-ends in GCC, noting some debugging challenges.

Proposes aligning gfortran error messages with Fortran standard terminology

Sat, 06 Jun 2026 00:00:00 GMT

Thomas Koenig suggests updating gfortran's error messages and options to use standard Fortran terminology, particularly concerning variable definition status.

Fortran: Fixes ICE with LOC intrinsic on polymorphic argument

Sat, 06 Jun 2026 00:00:00 GMT

GCC's Fortran compiler fixes an internal compiler error when using the LOC intrinsic with polymorphic arguments, improving stability for advanced Fortran featu…

csky: define DWARF_ALT_FRAME_RETURN_COLUMN`

Sat, 06 Jun 2026 00:00:00 GMT

csky: define DWARF_ALT_FRAME_RETURN_COLUMN`

Fortran: Fixes spurious error with inferred-type ASSOCIATE names

Sat, 06 Jun 2026 00:00:00 GMT

GCC's Fortran compiler no longer produces an incorrect 'Expected argument list' error for component references on inferred-type ASSOCIATE names.

Fortran: Fixes wrong code in DO CONCURRENT with ASSOCIATE blocks

Sat, 06 Jun 2026 00:00:00 GMT

GCC's Fortran compiler fixes a code generation error in DO CONCURRENT constructs that involve ASSOCIATE blocks and inline type-spec iterators.

Fixes incorrect encoding for zero-sized arrays in C

Sat, 06 Jun 2026 00:00:00 GMT

GCC fixes a regression where zero-sized arrays in C were incorrectly encoded on 32-bit architectures, leading to compilation issues.

Align predicates for SSSE3/AVX2 pmulhrsw/smulhrs expanders

Sat, 06 Jun 2026 00:00:00 GMT

GCC now correctly aligns predicates for SSSE3/AVX2 vector multiplication expanders on i386, resolving an internal compiler error when handling unaligned memory.

Correct can_open_code_p handling of abs and neg operations

Sat, 06 Jun 2026 00:00:00 GMT

GCC's `can_open_code_p` now correctly identifies whether absolute value and negation operations can be generated as open code, resolving an inconsistency in ho…

Extend can_open_code_p to handle bswap operations for store merging

Sat, 06 Jun 2026 00:00:00 GMT

GCC now uses `can_open_code_p` to determine if `bswap` operations can be open-coded during store merging, improving scalar optimization and fixing a RISC-V tes…

AI policy working group - 2026-06-05

Fri, 05 Jun 2026 00:00:00 GMT

AI policy working group - 2026-06-05

GCC 15.2.1 Status Report (2026-06-05), branch frozen for release

Fri, 05 Jun 2026 00:00:00 GMT

GCC 15.2.1 Status Report (2026-06-05), branch frozen for release

Giving targets a say in match.pd

Fri, 05 Jun 2026 00:00:00 GMT

Giving targets a say in match.pd

Increase Search Strength

Fri, 05 Jun 2026 00:00:00 GMT

Increase Search Strength

Invitation to join Infinity Station 41

Fri, 05 Jun 2026 00:00:00 GMT

Invitation to join Infinity Station 41

Invitation to join Vision Control 42

Fri, 05 Jun 2026 00:00:00 GMT

Invitation to join Vision Control 42

backprop: Calculate transitive closures of replacements [PR125599]

Fri, 05 Jun 2026 00:00:00 GMT

backprop: Calculate transitive closures of replacements [PR125599]

Bitintlower: Improve `__builtin_` lowering for bit operations on `_BitInt` types

Fri, 05 Jun 2026 00:00:00 GMT

GCC now generates more efficient code for bit manipulation and byte-swapping built-in functions when used with `_BitInt` types, avoiding unnecessary memory cop…

Add missing auto diagnostic group

Fri, 05 Jun 2026 00:00:00 GMT

GCC now correctly handles diagnostic groups for explicit instantiations of C++ variable templates.

Disable dependent ADL inside C++ header units to improve stream-in performance.

Fri, 05 Jun 2026 00:00:00 GMT

Dependent Argument-Dependent Lookup (ADL) is now disabled within C++ header units to prevent significant slowdowns in module stream-in.

Dependent ADL in C++ modules receives memory leak and logic fixes.

Fri, 05 Jun 2026 00:00:00 GMT

Multiple fixes addressed a memory leak and logical errors in the dependent Argument-Dependent Lookup (ADL) implementation for C++ modules, improving memory eff…

COBOL now consistently displays COMP-1/-2 variables with IBM dialect.

Fri, 05 Jun 2026 00:00:00 GMT

GCC's COBOL compiler now correctly displays `COMP-1` and `COMP-2` variables when using the IBM dialect, fixing an output formatting mismatch.

GCOBOL displays COMP-1/-2 in IBM format when dialect is set

Fri, 05 Jun 2026 00:00:00 GMT

GCOBOL now correctly displays COMP-1 and COMP-2 floating-point variables using IBM's specified format when the `-dialect ibm` option is active.

Update COBOL tests for IBM COMP- formatting differences.

Fri, 05 Jun 2026 00:00:00 GMT

COBOL test suite updated to reflect correct IBM `COMP-1` and `COMP-2` formatting for numeric `DISPLAY` operations.

contrib: Use 'command -v' in download_prerequisites

Fri, 05 Jun 2026 00:00:00 GMT

contrib: Use 'command -v' in download_prerequisites

Pilot CODEOWNERS file for Forgejo

Fri, 05 Jun 2026 00:00:00 GMT

A prototype CODEOWNERS file has been added to the Forgejo configuration for automated reviewer assignments.

Refactor assumed-rank array resizing in Fortran

Fri, 05 Jun 2026 00:00:00 GMT

The Fortran front end now uses a new helper function for resizing assumed-rank array dimensions, improving code organization.

Fix `EXECUTE_IF_SET_IN_HARD_REG_SET` usage in `rtl-ssa/insns.cc`

Fri, 05 Jun 2026 00:00:00 GMT

GCC fixes a bug in how `EXECUTE_IF_SET_IN_HARD_REG_SET` is used, preventing incorrect register clobber handling during RTL SSA processing by explicitly managin…

C and C++ now support `__builtin_bswapg` and `__builtin_bitreverseg` for generic types

Fri, 05 Jun 2026 00:00:00 GMT

GCC now provides type-generic built-in functions `__builtin_bswapg` and `__builtin_bitreverseg` for byte-swapping and bit-reversal, similar to Clang's offering…

Store-merging pass considers bswap and fixes RISC-V build

Fri, 05 Jun 2026 00:00:00 GMT

The store-merging optimization in GCC now correctly handles byte-swap operations and resolves a build failure on RISC-V.

Libstdc++: Generator avoids ill-formed nested types

Fri, 05 Jun 2026 00:00:00 GMT

The libstdc++ generator now correctly handles nested types by changing its second template parameter to `void`, resolving a long-standing issue with ill-formed…

Improved RTX costs from -mthumb on ARM.

Fri, 05 Jun 2026 00:00:00 GMT

Fixes wildly inaccurate instruction costs for Thumb-1, cutting generated code from 11 to 5 instructions in some shifts.

Tree optimization: Avoid negating the most negative signed value during loop analysis

Fri, 05 Jun 2026 00:00:00 GMT

GCC's tree-ssa-loop-niter pass now avoids incorrect negation of the most negative signed integer, preventing potential compiler misbehavior with loop iteration…

Testsuite: Improve enum argument testing of built-in functions

Fri, 05 Jun 2026 00:00:00 GMT

The GCC testsuite now performs more thorough testing of built-in functions' handling of enumerated type arguments, including those with fixed underlying types,…

Cselim prevents store sinking with loads in middle basic block

Fri, 05 Jun 2026 00:00:00 GMT

Cselim optimization now avoids sinking stores across basic blocks if there are loads accessing the same memory in an intermediate block, preventing incorrect c…

ALLOCATE of parameterized derived-type array initializes only first element

Fri, 05 Jun 2026 00:00:00 GMT

A Fortran compiler bug incorrectly initialized only the first element of parameterized derived-type arrays during allocation, leading to crashes due to uniniti…

Implied-do with allocatable-component causes wrong code

Fri, 05 Jun 2026 00:00:00 GMT

A Fortran compiler bug led to heap-use-after-free errors when reshape-like intrinsics with allocatable components were used in nested implied-do array construc…

M68k fixes invalid EXECUTE_IF_SET_IN_HARD_REG_SET conversion

Fri, 05 Jun 2026 00:00:00 GMT

This patch corrects a signedness issue in register number handling and a missing declaration within the m68k backend for GCC, resolving a bug in register usage…

expmed: Fix up CONST_POLY_INT case of make_tree [PR125621]

Fri, 05 Jun 2026 00:00:00 GMT

expmed: Fix up CONST_POLY_INT case of make_tree [PR125621]

Hard-reg-set: Make temporary SET for EXECUTE_IF_SET_IN_HARD_REG_SET a build-time error

Fri, 05 Jun 2026 00:00:00 GMT

GCC now prevents the use of temporary `SET` objects with `EXECUTE_IF_SET_IN_HARD_REG_SET` at build time, avoiding future errors.

fortran: ASSOCIATE with contained-function selector rejecting type-bound calls

Fri, 05 Jun 2026 00:00:00 GMT

fortran: ASSOCIATE with contained-function selector rejecting type-bound calls

Rust Drop trait support in gccrs - Status Report

Thu, 04 Jun 2026 00:00:00 GMT

Rust Drop trait support in gccrs - Status Report

Define duplication into sub-64-bit AdvSIMD vectors

Thu, 04 Jun 2026 00:00:00 GMT

GCC now supports duplicating elements into smaller Advanced SIMD vectors on AArch64, fixing an internal compiler error.

bitmap: Speed up bitmap_list_view

Thu, 04 Jun 2026 00:00:00 GMT

bitmap: Speed up bitmap_list_view

bitmap: Tweak bitmap_tree_unlink_element

Thu, 04 Jun 2026 00:00:00 GMT

bitmap: Tweak bitmap_tree_unlink_element

bitmap: Avoid amortised O(E) behaviour for tree first/last bit

Thu, 04 Jun 2026 00:00:00 GMT

bitmap: Avoid amortised O(E) behaviour for tree first/last bit

Bitmap avoids a redundant splay operation to speed up tree linking.

Thu, 04 Jun 2026 00:00:00 GMT

A redundant tree splay operation in `bitmap_tree_link_element` is removed, improving performance by 20% in an artificial test case.

Cobol: Regenerates lang.opt.urls.

Thu, 04 Jun 2026 00:00:00 GMT

The `gcc/cobol/lang.opt.urls` file was regenerated to reflect recent changes in the Cobol front-end.

cobol: Bring TRIM into accordance with the COBOL specification.

Thu, 04 Jun 2026 00:00:00 GMT

cobol: Bring TRIM into accordance with the COBOL specification.

COBOL searches for copybooks in the compiler, not the driver.

Thu, 04 Jun 2026 00:00:00 GMT

COBOL frontend now handles copybook path searches directly, aligning with Modula-2 and supporting `-B` and `-idirafter`.

Fortran fixes a bug where `always_explicit` attribute was not copied.

Thu, 04 Jun 2026 00:00:00 GMT

A bug in Fortran's `gfc_copy_attr` prevented `always_explicit` from being copied, leading to incorrect array handling and potential garbage values.

Fortran avoids an ICE when submodule functions return pointers.

Thu, 04 Jun 2026 00:00:00 GMT

Fortran compiler no longer crashes (ICE) when a submodule function declares an implicit pointer result, improving error handling.

Fortran: fix stack-buffer-overflow passing type to assumed-rank class [PR60576]

Thu, 04 Jun 2026 00:00:00 GMT

Fortran: fix stack-buffer-overflow passing type to assumed-rank class [PR60576]

c: wrong code generated with counted_by on pointer + ubsan [PR125072]

Thu, 04 Jun 2026 00:00:00 GMT

c: wrong code generated with counted_by on pointer + ubsan [PR125072]

GCC correctly costs `mulh` instruction for RISC-V, improving code generation.

Thu, 04 Jun 2026 00:00:00 GMT

GCC now properly costs the RISC-V `mulh` instruction, leading to better code generation by favoring multiplication for division-by-constant.

Add 86ff0e88764bfbff1a4989414ec83c0eaa723107 to ignored_commits

Thu, 04 Jun 2026 00:00:00 GMT

This commit updates an internal list of Git commit hashes that the GCC changelog generation script should ignore.

GCC optimizes hard register set iteration by replacing `TEST_HARD_REG_BIT`.

Thu, 04 Jun 2026 00:00:00 GMT

GCC improves the efficiency of iterating over hard register sets by replacing `TEST_HARD_REG_BIT` with `hard_reg_set_iterator` and `hard_reg_set_popcount`.

Disabling a match pattern for non-GIMPLE avoids infinite loops.

Thu, 04 Jun 2026 00:00:00 GMT

GCC now disables a specific optimization pattern for non-GIMPLE code, preventing a stack overflow crash.

PTImode attribute handling is now fixed for rs6000 targets.

Thu, 04 Jun 2026 00:00:00 GMT

GCC now correctly handles PTImode attributes for 128-bit values on rs6000 targets, resolving compilation failures.

libstdc++ removes trailing whitespace from debug/safe_iterator.h.

Thu, 04 Jun 2026 00:00:00 GMT

Trailing whitespace is removed from `libstdc++/include/debug/safe_iterator.h` for code hygiene.

RISC-V: Specifies cmodel in option default specs.

Thu, 04 Jun 2026 00:00:00 GMT

The RISC-V GCC port now explicitly specifies the default code model in `OPTION_DEFAULT_SPECS` for improved multilib support.

Testsuite adds PowerPC future hardware compiler support checks

Thu, 04 Jun 2026 00:00:00 GMT

New `lib/target-supports.exp` procedures enable testing future PowerPC hardware support, both at compile time and runtime.

AArch64: Avoid zeroing movprfx on MOV/FMOV

Thu, 04 Jun 2026 00:00:00 GMT

AArch64: Avoid zeroing movprfx on MOV/FMOV

Phiopt now factors out more than single-operand operations

Thu, 04 Jun 2026 00:00:00 GMT

The phiopt pass in GCC has been enhanced to factor out operations with more than two operands, improving code optimization.

OpenRISC fixes 64-bit shift operations in GCC

Thu, 04 Jun 2026 00:00:00 GMT

GCC for OpenRISC now correctly handles 64-bit shift operations by defining `SHIFT_COUNT_TRUNCATED` and correcting shift amount predicates.

c++: CWG 1704, type checking in explicit inst of var tmpl [PR125575]

Wed, 03 Jun 2026 00:00:00 GMT

c++: CWG 1704, type checking in explicit inst of var tmpl [PR125575]

c: harmonize handling of arrays

Wed, 03 Jun 2026 00:00:00 GMT

c: harmonize handling of arrays

DOM avoids processing unreachable code with multiple SSA names.

Wed, 03 Jun 2026 00:00:00 GMT

The Dominator Optimiser now aborts processing unreachable code when a branch condition involves two SSA names, preventing incorrect global value assignments.

RISC-V multilib supports extra options for fine-grained configuration.

Wed, 03 Jun 2026 00:00:00 GMT

RISC-V multilib-generator now accepts additional options in its configuration string, allowing for more specific multilib builds.

RISC-V canonical extension order now matches the latest ISA specification.

Wed, 03 Jun 2026 00:00:00 GMT

RISC-V extension canonical order is updated to align with the latest ISA specification, moving 'v' before 'p' and dropping 'n'.

I386 gains function multiversioning support for AVX10.2 and APXF.

Wed, 03 Jun 2026 00:00:00 GMT

GCC now supports Function Multiversioning (FMV) for upcoming AVX10.2 and APXF instruction sets, allowing optimized code execution on newer Intel processors.

SLP vectorizer improves error recovery by prioritizing operand swaps.

Wed, 03 Jun 2026 00:00:00 GMT

The SLP vectorizer in GCC now prioritizes attempting operand swaps during child discovery to prevent premature scalar fallback and improve vectorization succes…

I386 enables fusion and SSE reduction tunings for znver6

Tue, 02 Jun 2026 00:00:00 GMT

GCC now applies specific instruction fusion and SSE reduction optimizations for AMD's Zen 6 (znver6) processors, improving performance.

aarch64: use ZIP1 instead of UZP1 for concatenation [PR125550]

Tue, 02 Jun 2026 00:00:00 GMT

aarch64: use ZIP1 instead of UZP1 for concatenation [PR125550]

MicroBlaze adds Linux signal frame unwinding support

Tue, 02 Jun 2026 00:00:00 GMT

GCC's libgcc for MicroBlaze Linux now supports DWARF unwinding through signal frames, enabling correct stack traces andpthread cancellation.

Testsuite: Removes duplicate Asan and pthread libraries for Darwin

Mon, 01 Jun 2026 00:00:00 GMT

GCC's testsuite for C++ on Darwin no longer includes redundant Asan and pthread libraries, avoiding linker complaints.

Fix spurious fails in mktemp tests on Darwin

Mon, 01 Jun 2026 00:00:00 GMT

GCC test suite now correctly handles temporary file creation functions by including both necessary headers and addressing deprecation warnings on Darwin.

Testsuite resolves non-unique test names under several sections

Mon, 01 Jun 2026 00:00:00 GMT

This patch improves readability of GCC test reports by appending options to test names, making many previously non-unique test entries distinct.

testsuite, c++, x86, Darwin: Adjust func body scan tests for Darwin ABI/asm.

Mon, 01 Jun 2026 00:00:00 GMT

testsuite, c++, x86, Darwin: Adjust func body scan tests for Darwin ABI/asm.

Register allocation for virtual register targets

Sun, 31 May 2026 00:00:00 GMT

AVR: Support [[len=nl]] in asm templates

Sun, 31 May 2026 00:00:00 GMT

Inline assembly templates for AVR now support [[len=nl]] to conveniently specify instruction size as half the default.

AVR: Fix overly long URLs in the printed PDF documentation.

Sun, 31 May 2026 00:00:00 GMT

The AVR backend's documentation now has shorter URLs that fit within page boundaries in the PDF.

Improve code generation for select between register and -1 on RISC-V.

Sun, 31 May 2026 00:00:00 GMT

GCC now generates more compact RISC-V code for conditional assignments where one branch is -1.

hppa: Fix clear_cache pattern and use it in pa_trampoline_init

Sun, 31 May 2026 00:00:00 GMT

hppa: Fix clear_cache pattern and use it in pa_trampoline_init

testsuite, c, x86, Darwin: Adjust func body scan tests for Darwin ABI/asm.

Sun, 31 May 2026 00:00:00 GMT

testsuite, c, x86, Darwin: Adjust func body scan tests for Darwin ABI/asm.

need help with a g77 compile error

Sat, 30 May 2026 00:00:00 GMT

need help with a g77 compile error

c++: Don't ICE on the static constexpr expansion-stmt vars during mangling [PR125123]

Sat, 30 May 2026 00:00:00 GMT

c++: Don't ICE on the static constexpr expansion-stmt vars during mangling [PR125123]

Cobol: Include m4/autoconf.m4 for autoconf support.

Sat, 30 May 2026 00:00:00 GMT

The COBOL compiler now includes m4/autoconf.m4, likely for improved autoconf integration.

Fix scan-asm failure for loongarch64 after recent ext-dce changes

Sat, 30 May 2026 00:00:00 GMT

Fix scan-asm failure for loongarch64 after recent ext-dce changes

C: Implement bit-precise enums as specified in C2Y N3705

Sat, 30 May 2026 00:00:00 GMT

This commit implements bit-precise enums as defined in C2Y N3705.

Range-op: Teach multiplication about non-negative results.

Sat, 30 May 2026 00:00:00 GMT

The range analysis pass now understands that a*a is non-negative, which helps optimize RISC-V VSETVL.

Fix m68k bootstrap due to diagnostic

Sat, 30 May 2026 00:00:00 GMT

Fix m68k bootstrap due to diagnostic

testsuite: adjust tests for FIRSTP/LASTP SVE2 instructions

Sat, 30 May 2026 00:00:00 GMT

testsuite: adjust tests for FIRSTP/LASTP SVE2 instructions

AI Policy Working Group Met

Fri, 29 May 2026 00:00:00 GMT

The GCC AI policy working group met to discuss how they intend to work and discussed a recent email from RMS about AI policies for GNU projects.

FOSSY 2026 Toolchain Track CFP Deadline Approaching

Fri, 29 May 2026 00:00:00 GMT

The call for proposals for the toolchain track at FOSSY 2026 in Vancouver closes on June 1st.

GSoC Student Asks About Implementing OpenACC device_type Clause

Fri, 29 May 2026 00:00:00 GMT

A GSoC student asks about naming and resolving the type of the OpenACC device_type clause, which conflicts with an OpenMP clause.

GSoC Student Reports on First Week Implementing OpenACC Directives

Fri, 29 May 2026 00:00:00 GMT

A GSoC student details their progress implementing OpenACC init/shutdown/set directives in GCC, focusing on parsing in the Fortran front-end and linking API ru…

Inquiry About register_operand in Non-Strict RTL

Fri, 29 May 2026 00:00:00 GMT

Georg-Johann Lay asks whether a register_operand in non-strict RTL can contain a REG_P register that doesn't satisfy the operand's constraint.

Need help with a g77 compile error

Fri, 29 May 2026 00:00:00 GMT

A user is encountering a "ld: cannot open -lg2c" error when compiling with g77 and is seeking assistance.

C++: Fix build_value_init_noctor anon aggr handling

Fri, 29 May 2026 00:00:00 GMT

The C++ compiler now correctly initializes anonymous aggregates without default constructors, fixing a bootstrap failure.

GCC Cobol gains speedups, function prototypes, POSIX compatibility.

Fri, 29 May 2026 00:00:00 GMT

This commit improves the execution speed of arithmetic operations and file reads in GCC Cobol, adds function prototypes, and starts implementing a POSIX compat…

Contrib: Make dg-extract-results.py tolerant of unparseable files for GDB.

Fri, 29 May 2026 00:00:00 GMT

The `dg-extract-results.py` script now handles malformed test output files gracefully, preventing data loss in parallel test runs.

Fix -Wstringop-overflow warning in pr125453-1.c at -O2 on some targets.

Fri, 29 May 2026 00:00:00 GMT

The test case pr125453-1.c now suppresses the `-Wstringop-overflow` warning to avoid masking a more critical ICE issue.

Fix Missing End Brace in bb-slp-complex-mla-half-float.c Test

Fri, 29 May 2026 00:00:00 GMT

Adds a missing end brace to a test file, fixing a testsuite issue.

AVR: Use hard-reg constraints in FMUL[S[U]] instructions.

Fri, 29 May 2026 00:00:00 GMT

The AVR backend now uses hard register constraints for FMUL instructions, improving code generation.

I386: Rewrite index*1+disp into base+disp

Fri, 29 May 2026 00:00:00 GMT

GCC now optimizes i386 address calculations by rewriting index*1+displacement into base+displacement, reducing code size and improving efficiency.

Libgcc now supports -mcall-ms2sysv-xlogues on FreeBSD/x86.

Fri, 29 May 2026 00:00:00 GMT

Libgcc now provides the necessary symbols for `-mcall-ms2sysv-xlogues` on FreeBSD/x86, fixing linker errors in ABI tests.

Libgfortran: Use MapViewOfFileEx instead of MapViewOfFileExNuma in caf_shmem

Fri, 29 May 2026 00:00:00 GMT

Libgfortran now uses `MapViewOfFileEx` instead of `MapViewOfFileExNuma` for shared memory, maintaining Windows XP support.

libstdc++: Correct swapping order for flat_set.

Fri, 29 May 2026 00:00:00 GMT

The order of swapping members in `flat_set::swap` has been corrected to swap the container first.

Testsuite: Tweak sse2-p{add,sub}[bdw]-2.c tests for -march=cascadelake

Fri, 29 May 2026 00:00:00 GMT

The sse2-p{add,sub}[bdw]-2.c tests now support the -march=cascadelake option, ensuring proper functionality on newer Intel architectures.

OpenMP: Disallow omp_mem_alloc for static variables in ALLOCATE directive.

Fri, 29 May 2026 00:00:00 GMT

The OpenMP ALLOCATE directive can no longer be used with omp_mem_alloc allocators for static variables, aligning with OpenMP 6.1.

GTY markers added to `range_storage` classes for garbage collection.

Fri, 29 May 2026 00:00:00 GMT

GTY markers have been added to `vrange_storage` classes in GCC to prepare for future pointer analysis and garbage collection within value range data structures.

TREEDEF vs built-in for OpenACC directives

Thu, 28 May 2026 00:00:00 GMT

A GSoC student asks when to use TREEDEF nodes versus built-in functions for implementing OpenACC directives in GCC.

Understanding STANDARD_BINDIR_PREFIX and -B overrides

Thu, 28 May 2026 00:00:00 GMT

A developer seeks to understand how the `-B` flag overrides `STANDARD_BINDIR_PREFIX` in GCC to correctly locate COBOL include files.

AVR: Supports [[len=]] notes in inline asm to specify its size.

Thu, 28 May 2026 00:00:00 GMT

GCC now supports `[[len=]]` notes in AVR inline assembly to specify the size of the assembly code.

avr.opt.urls: Add options for assembly length notes.

Thu, 28 May 2026 00:00:00 GMT

The options `-masm-len-notes` and `-Wasm-len-notes` are added for controlling assembly length notes in the AVR backend.

AVR: Use hard-reg constraints in divmod instructions.

Thu, 28 May 2026 00:00:00 GMT

The AVR backend now uses hard-register constraints for division and modulo operations, simplifying the instruction patterns.

c++: Fix infinite looping with arr[arr] [PR125454]

Thu, 28 May 2026 00:00:00 GMT

Fixes an infinite recursion in C++ code when an array is indexed by itself, like arr[arr].

c++: Add fixed test [PR106957]

Thu, 28 May 2026 00:00:00 GMT

Adds a test case to verify the fix for a C++ compiler bug involving unevaluated lambda expressions.

Fortran: Fix character length checking for array element arguments.

Thu, 28 May 2026 00:00:00 GMT

The Fortran compiler now correctly checks character lengths when passing array element arguments to character dummy arguments.

Fortran's f_c_string Intrinsic Gets Performance and Docs Boost

Thu, 28 May 2026 00:00:00 GMT

Improves efficiency of the `f_c_string` intrinsic in Fortran, adds constant string folding, and provides documentation.

Fortran Gains New Intrinsic: c_f_strpointer for String Pointers

Thu, 28 May 2026 00:00:00 GMT

Adds the `c_f_strpointer` intrinsic to Fortran, enabling interoperability with C string pointers as part of Fortran 2023 support.

x86_64: Improves Cost Estimation for SSE 128-bit Rotations

Thu, 28 May 2026 00:00:00 GMT

Corrects the cost estimation for 128-bit rotations using SSE instructions on x86_64, fixing a performance regression in code generation.

RISC-V: Fix sync builtins unspec->unspecv.

Thu, 28 May 2026 00:00:00 GMT

This commit corrects the RISC-V sync builtins by moving and renaming atomic unspec enums to the unspecv enum.

Drop Compromised scan-asm Test After Vectorized Loop Epilogue Changes

Thu, 28 May 2026 00:00:00 GMT

Removes a scan-asm test for RISC-V due to recent changes in vectorized loop epilogues that caused the test to fail.

Fix expected testsuite output after ext-dce changes

Thu, 28 May 2026 00:00:00 GMT

The RISC-V testsuite is updated to accommodate changes in dead code elimination that may transform sign extensions into zero extensions.

x86 SSE: Improve vector increment/decrement on x86

Thu, 28 May 2026 00:00:00 GMT

The x86 backend now generates more efficient SSE code for incrementing and decrementing vectors by using subtraction instead of addition where appropriate.

Test Now Requires AVX-512 at Runtime, Not Just Compile Time

Thu, 28 May 2026 00:00:00 GMT

Updates a test case to require AVX512F support at runtime, ensuring the code behaves correctly when the feature is actually used.

x86_64: Improve SSE Code Generation for 128-bit Integer Comparisons

Thu, 28 May 2026 00:00:00 GMT

Enables scalar-to-vector transformation for 128-bit integer comparisons on x86_64 with SSE, resulting in more efficient code.

Ranger-fold: Avoid calling gimple_stmt_nonnegative_p with varying ranges.

Thu, 28 May 2026 00:00:00 GMT

Range folding now correctly handles varying ranges by setting the range to `[type_min, type_max]` instead of calling `gimple_stmt_nonnegative_p`.

Gccrs: Work around -Wrestrict false positive.

Thu, 28 May 2026 00:00:00 GMT

This commit addresses a false positive `-Wrestrict` warning in Gccrs by disabling the check within the affected code section.

i386: Emit 'lea' instruction directly to avoid ICE.

Thu, 28 May 2026 00:00:00 GMT

The i386 backend now directly emits a 'lea' instruction in certain cases to avoid an internal compiler error.

libstdc++: Improve complexity of flat_map insertion.

Thu, 28 May 2026 00:00:00 GMT

The flat_map::_M_insert function now merges in linearithmic time, rather than logarithmic time, for sorted input.

i386: Refines c86-4g fdiv scheduling model

Thu, 28 May 2026 00:00:00 GMT

GCC's i386 backend now refines the scheduling model for floating-point division to better reflect hardware behavior.

libstdc++: Fix availability of flat_meow::operator=(initializer_list)

Thu, 28 May 2026 00:00:00 GMT

Fixes an issue where the assignment operator for `flat_map`, `flat_set` and their multi variants using initializer lists was not properly inherited.

libstdc++: Fix -fno-exceptions support in testsuite_allocator.h

Thu, 28 May 2026 00:00:00 GMT

The libstdc++ testsuite now correctly handles code compiled without exception support by using __try/__catch blocks.

RISC-V: Enable LMUL cost scaling for fixed-length vector modes.

Thu, 28 May 2026 00:00:00 GMT

The RISC-V vectorizer now applies LMUL cost scaling to fixed-length vector modes, potentially leading to the selection of smaller LMULs.

libstdc++: Implement P3567R2 flat_meow fixes

Thu, 28 May 2026 00:00:00 GMT

Implements fixes from P3567R2 for the `flat_map` and `flat_set` containers in libstdc++.

testsuite: Add AVX512 requirement to a vectorization test.

Thu, 28 May 2026 00:00:00 GMT

The test case vect-early-break-no-epilog_11.c now requires AVX512 instructions on x86_64 to vectorize correctly.

SSA Loop Optimizations: Store Motion Gets More Efficient

Thu, 28 May 2026 00:00:00 GMT

Refactors loop store motion code in GCC to avoid redundant checks and reduce memory usage.

Fortran: Fixes ICE in DO CONCURRENT with DEFAULT(NONE) inside ASSOCIATE.

Thu, 28 May 2026 00:00:00 GMT

This commit resolves two bugs that caused an Internal Compiler Error (ICE) when a Fortran `DO CONCURRENT` loop with inline type-spec iterators was nested withi…

C++ OpenMP now handles ARRAY_TYPE array sections in mappers, not just pointers.

Thu, 28 May 2026 00:00:00 GMT

GCC now correctly handles C++ `ARRAY_TYPE` expressions, in addition to pointers, when mapping OpenMP array sections, fixing a bug introduced in a previous comm…

Make prange_storage::equal_p more efficient.

Thu, 28 May 2026 00:00:00 GMT

Make prange_storage::equal_p more efficient.

AGI CPU

Wed, 27 May 2026 00:00:00 GMT

A survey on AGI CPUs is available; sample reports can be shared upon request.

GCC 16 doesn't fill -MF dependency file on compilation failure

Wed, 27 May 2026 00:00:00 GMT

GCC 16 with -MD -MF doesn't write dependency files when compilation fails; the author seeks a workaround without patching GCC.

AArch64: Fix SVE to SIMD lowering optimization.

Wed, 27 May 2026 00:00:00 GMT

Corrects an SVE to SIMD lowering optimization bug that generated invalid code on AArch64.

AArch64: Uses UINTVAL consistently.

Wed, 27 May 2026 00:00:00 GMT

GCC's AArch64 backend now consistently uses UINTVAL instead of casting INTVAL to unsigned HOST_WIDE_INT.

c++: Avoid ICE when evaluating constants of error type.

Wed, 27 May 2026 00:00:00 GMT

Fixes an internal compiler error (ICE) in C++ code when evaluating a constant expression of error_mark_node type during error recovery.

fortran: fix ICE with procedure pointer declared in BLOCK

Wed, 27 May 2026 00:00:00 GMT

fortran: fix ICE with procedure pointer declared in BLOCK

Testsuite: Fix Winvalid-memory-model*.C

Wed, 27 May 2026 00:00:00 GMT

Corrects line numbers in Winvalid-memory-model test cases after a recent change added dg-additional-options.

libgomp: Fix ipr_vendor for OpenMP's Interop

Wed, 27 May 2026 00:00:00 GMT

Corrects the vendor ID for OpenMP interop to identify the compiler (GNU) rather than the foreign runtime (e.g., CUDA, ROCm).

Testsuite: Restrict mpc860_no_lwsync.c to Power ilp32 Targets

Wed, 27 May 2026 00:00:00 GMT

The mpc860_no_lwsync.c test is now restricted to 32-bit PowerPC targets to avoid conflicts with 64-bit options.

Vectorization: Skip scalar epilogue when it's unnecessary.

Wed, 27 May 2026 00:00:00 GMT

The vectorizer now avoids generating a scalar epilogue for loops when it's not needed, improving performance.

Vectorization: Refactor loop peeling for early exits.

Wed, 27 May 2026 00:00:00 GMT

Refactors loop peeling to handle early exits more explicitly, preparing for optimizations that avoid epilogues.

Vectorization: Drop prefetches during if-conversion.

Wed, 27 May 2026 00:00:00 GMT

The vectorizer will now drop prefetches during if-conversion, which simplifies later vectorization efforts.

Ada: Robustify error recovery of structural instantiation in generic formal part

Wed, 27 May 2026 00:00:00 GMT

GCC's Ada compiler improves error recovery for structural instantiations within generic formal parts, preventing cascading errors during compilation.

Ada: Fixes extra formal mismatch.

Wed, 27 May 2026 00:00:00 GMT

This commit corrects a condition that determines when to add finalization collection extra formals to BIP functions in the Ada compiler.

Fortran: Fixes ICE for ASSOCIATE selectors with type-bound user-defined operators.

Wed, 27 May 2026 00:00:00 GMT

This commit resolves three bugs that could cause an Internal Compiler Error (ICE) or incorrect code generation when `ASSOCIATE` selectors in Fortran involved t…

Assign copyright to FSF for GCC contributions

Tue, 26 May 2026 00:00:00 GMT

Henri Menke wants to assign copyright for their past and future GCC contributions to the Free Software Foundation.

Stage2 build failure due to uninitialized variable

Tue, 26 May 2026 00:00:00 GMT

GCC trunk fails to bootstrap due to a maybe-uninitialized variable warning being treated as an error in stage2.

Take middle-end stringop/array warnings out of -Wall?

Tue, 26 May 2026 00:00:00 GMT

Move middle-end stringop/array warnings out of `-Wall` and into `-Wextra`, adding a new `-Wmiddle-end` diagnostic group for finer control.

Visitors Database List For IAPP AI Governance Global Europe 2026

Tue, 26 May 2026 00:00:00 GMT

Spam regarding access to a database of visitors for IAPP AI Governance Global Europe 2026.

Ada: Fix build error with POSIX sed

Tue, 26 May 2026 00:00:00 GMT

The Ada compiler now builds correctly when using POSIX sed.

Bootstrap Fixes Uninitialized Variable Error in Tree Vectorization

Tue, 26 May 2026 00:00:00 GMT

The compiler now initializes a variable in the tree vectorization code to avoid a build failure with certain compiler flags (-Werror=maybe-uninitialized).

C++ Reflection Avoids ICE When Substituting Base Class Information

Tue, 26 May 2026 00:00:00 GMT

The compiler now avoids internal compiler errors (ICE) when substituting base class information during C++ reflection.

Finalize deprecation of -Wstrict-overflow.

Tue, 26 May 2026 00:00:00 GMT

The deprecated `-Wstrict-overflow` flag is now officially a no-op.

i386: Disable gather optimizations for Diamond Rapids

Tue, 26 May 2026 00:00:00 GMT

Gather optimizations are now disabled for Diamond Rapids processors to improve pipeline utilization.

Libffi Tests Use Correct Include Paths for Multilib Targets

Tue, 26 May 2026 00:00:00 GMT

Libffi tests now use the correct include paths when building for multilib targets, fixing include errors.

Libstdc++ now allocates only what it reports for P0401.

Tue, 26 May 2026 00:00:00 GMT

Libstdc++'s allocate_at_least now rounds allocation requests down to the reported size, addressing discrepancies during deallocation.

Libstdc++: Fix for freestanding [PR125450]

Tue, 26 May 2026 00:00:00 GMT

The header is modified to avoid defining range_format when building in a freestanding environment.

Libstdc++ Reverts to Dynamic Sizing for ref_view

Tue, 26 May 2026 00:00:00 GMT

The library now calculates the size of `ref_view` dynamically, reverting a change that made it statically sized and caused unexpected type changes.

RISC-V: Correct REGNO_REG_CLASS for FP hard registers.

Tue, 26 May 2026 00:00:00 GMT

The REGNO_REG_CLASS macro now returns the correct register class for all floating-point registers, fixing a cost model corruption in IRA.

Testsuite: Remove tests related to Wstrict-overflow.

Tue, 26 May 2026 00:00:00 GMT

The testsuite no longer includes tests for the `-Wstrict-overflow` flag, which is now deprecated.

Gfortran adds support for Fortran 2023 EX format read.

Tue, 26 May 2026 00:00:00 GMT

The Gfortran compiler now implements the Fortran 2023 `EX` edit-descriptor for reading hexadecimal-significand or decimal floating-point input.

Fix missing last bit read in bitmap_last_set_bit function

Mon, 25 May 2026 00:00:00 GMT

The `bitmap_last_set_bit` function now correctly identifies the last set bit in a bitmap, preventing it from missing the last bit in the first element.

Adjust stack-usage-realign.c to account for user visibility name

Mon, 25 May 2026 00:00:00 GMT

The stack-usage-realign.c test case is updated to include the user visibility name, matching a recent change in stack usage output.

Adjust stack-usage-realign.c for recent stack usage output format change.

Mon, 25 May 2026 00:00:00 GMT

Updates a test case to match the new format of the `-fstack-usage` output.

C parser: Remove errant `optimize` pragma

Mon, 25 May 2026 00:00:00 GMT

An unintended `#pragma optimize` was removed from the GCC C parser.

Restore original -fstack-usage format, add mangled name as field

Mon, 25 May 2026 00:00:00 GMT

The -fstack-usage option now includes the mangled function name in its output, minimizing backward compatibility breakage.

Remove Wstrict-overflow warning from maybe_optimize_sub_cmp_0

Mon, 25 May 2026 00:00:00 GMT

The compiler no longer warns about strict overflow in the maybe_optimize_sub_cmp_0 function.

libstdc++: Adjust test expectations for trivial unions (P3074R7).

Mon, 25 May 2026 00:00:00 GMT

Updates libstdc++ tests to reflect that trivial unions are now trivially destructible under `__cpp_trivial_union >= 202502L`.

libstdc++: Optimize stream output for piecewise distributions.

Mon, 25 May 2026 00:00:00 GMT

The `operator<<` for piecewise distributions avoids creating a temporary vector, improving performance.

libstdc++: Expand serialization test for piecewise distributions.

Mon, 25 May 2026 00:00:00 GMT

New serialization tests added for piecewise constant and linear distributions, but limited to x86_64 architectures.

Match: Reject non-integral types in `(smaller)a ==/!= (smaller) b` pattern.

Mon, 25 May 2026 00:00:00 GMT

The compiler avoids generating invalid GIMPLE when comparing pointers cast to smaller integer types.

OpenMP: Fix error message for duplicate variants.

Mon, 25 May 2026 00:00:00 GMT

Corrects the error message when duplicate variants are declared in OpenMP.

Remove compare_values_warnv function

Mon, 25 May 2026 00:00:00 GMT

The compare_values_warnv function, along with strict overflow warning logic, has been removed from the tree-vrp module.

xtensa: Optimize 'insvsi' insn pattern if TARGET_DEPBITS is not configured

Mon, 25 May 2026 00:00:00 GMT

xtensa: Optimize 'insvsi' insn pattern if TARGET_DEPBITS is not configured

xtensa: Remove '*splice_bits' insn pattern

Mon, 25 May 2026 00:00:00 GMT

xtensa: Remove '*splice_bits' insn pattern

Ada: Rejects structural instantiation in generic formal parts.

Mon, 25 May 2026 00:00:00 GMT

The Ada compiler now explicitly disallows structural instantiation within generic formal parts, as this feature is currently unsupported.

Ada: Avoids suspicious index warnings in expanded code.

Mon, 25 May 2026 00:00:00 GMT

The Ada compiler now prevents spurious 'suspicious index' warnings that arose in optimized or expanded code by checking only source-native elements.

Replace class format_prange with a function.

Mon, 25 May 2026 00:00:00 GMT

Replace class format_prange with a function.

Cortex-M52 is not affected by CVE-2021-35465.

Mon, 25 May 2026 00:00:00 GMT

The `cortex-m52` CPU definition no longer enables the `quirk_vlldm` feature, preventing unnecessary CVE-2021-35465 mitigations.

Starting patch review wiki

Sun, 24 May 2026 00:00:00 GMT

Andrew Pinski added recommendations to the patch review wiki for new developers to use tools for commit message and coding style correctness.

AVR: Use hard-reg constraints for __load_ insns.

Sun, 24 May 2026 00:00:00 GMT

The AVR backend now uses hard-register constraints for `__load_` instructions, simplifying code generation for flash memory accesses.

AVR: Implement fixed-point conversions to/from [u]int24_t.

Sun, 24 May 2026 00:00:00 GMT

The AVR backend now supports conversions between fixed-point numbers and 24-bit integers, resolving link errors.

Fortran: Add EX Format Rounding for Truncated Hex Mantissa

Sun, 24 May 2026 00:00:00 GMT

Implements proper rounding of the hex mantissa in Fortran's EX format, supporting all rounding modes and normalization.

Fortran: Fix EX format kind=8 output on ILP32 targets

Sun, 24 May 2026 00:00:00 GMT

The Fortran compiler now correctly outputs hexadecimal format for kind=8 real numbers on 32-bit systems, resolving a truncation issue.

C: Cleanups for function comptypes hierarchy

Sun, 24 May 2026 00:00:00 GMT

This commit refactors the comptypes function hierarchy in the C language frontend to improve code clarity and correctness.

Algol68: Open source files in binary mode

Sun, 24 May 2026 00:00:00 GMT

The Algol68 compiler now opens source files in binary mode, fixing issues with CRLF newlines on Windows.

Add indirect alignment tests for Win64 AVX

Sun, 24 May 2026 00:00:00 GMT

New tests confirm correct stack alignment when passing AVX/AVX512 values indirectly on Windows.

Optimize `(~y & x) ^ y` into `(y | x)`

Sun, 24 May 2026 00:00:00 GMT

GCC now optimizes the expression `(~y & x) ^ y` into `(y | x)` to simplify code.

x86: Fix stack alignment for AVX arguments on Windows.

Sun, 24 May 2026 00:00:00 GMT

Fixes stack alignment issues for indirect AVX arguments and return values on Windows, ensuring correct memory access.

Consider removing middle-end stringop/array warnings from -Wall

Sat, 23 May 2026 00:00:00 GMT

Richard Biener suggests using path rangers to prove paths to stringop/array warnings are not taken before emitting a diagnostic.

fortran: Module-contained PRIVATE procedures must have global ELF linkage

Sat, 23 May 2026 00:00:00 GMT

Fortran's PRIVATE module procedures now have global ELF linkage, allowing submodules to access them via host association.

Fortran: Fix scalar class to derived select type entities

Sat, 23 May 2026 00:00:00 GMT

Fixed an issue in Fortran's handling of scalar class to derived type assignment in select type constructs.

Improve slli+zext+andi sequence for RISC-V

Sat, 23 May 2026 00:00:00 GMT

Improved RISC-V code generation by optimizing the slli+zext+andi sequence into slli+srli.

Fortran: Fix ICE in allocatable finalization expression

Sat, 23 May 2026 00:00:00 GMT

Fixes an internal compiler error (ICE) in Fortran when finalizing allocatable variables before assignment.

Agi Cpu

Fri, 22 May 2026 00:00:00 GMT

Unsolicited commercial email about an AGI CPU survey.

Gcc

Fri, 22 May 2026 00:00:00 GMT

Unsolicited commercial email about a conference attendee database.

Is it time to take middle-end stringop/array warnings out of -Wall?

Fri, 22 May 2026 00:00:00 GMT

Richard suggests that middle-end diagnostics should enable diagnostic-paths to show currently visible preconditions in C++.

cfgrtl: Forbid forwarder blocks from having clobbers [PR125375]

Fri, 22 May 2026 00:00:00 GMT

cfgrtl: Forbid forwarder blocks from having clobbers [PR125375]

Fortran: Fix .texi and comment typos

Fri, 22 May 2026 00:00:00 GMT

Fortran: Fix .texi and comment typos

Fortran: invoke.texi - document -fcoarray=shared [PR125416]

Fri, 22 May 2026 00:00:00 GMT

Fortran: invoke.texi - document -fcoarray=shared [PR125416]

gcc-17-577-gbc19036af435: 2 regressions on aarch64

Fri, 22 May 2026 00:00:00 GMT

gcc-17-577-gbc19036af435: 2 regressions on aarch64

c++: defaulted ctor vs template ctor

Fri, 22 May 2026 00:00:00 GMT

Fixes a compiler cycle related to defaulted constructors and template constructors in C++.

GCC now supports C++26 trivial unions per P3074R7 and CWG3189.

Fri, 22 May 2026 00:00:00 GMT

GCC now implements the C++26 trivial unions feature, allowing unions with simpler initialization and destruction semantics.

Match.pd now handles BUILT_IN_BITREVERSE8 like the other bitreverses.

Fri, 22 May 2026 00:00:00 GMT

GCC's pattern-matching pass now recognises `__builtin_bitreverse8` when optimising bit-reversal operations.

ifcvt: Factor: Turn asserts about abnormals to conditional

Fri, 22 May 2026 00:00:00 GMT

The ifcvt pass now avoids factoring in cases where SSA names are used in abnormal edges.

libstdc++: Fix some test failures due to vector using allocate_at_least

Fri, 22 May 2026 00:00:00 GMT

libstdc++: Fix some test failures due to vector using allocate_at_least

OpenMP: Enable 'declare mapper' mappers for 'target update' directives

Fri, 22 May 2026 00:00:00 GMT

OpenMP: Enable 'declare mapper' mappers for 'target update' directives

RISC-V: Add per-type reduction costs to the vector cost model

Fri, 22 May 2026 00:00:00 GMT

RISC-V: Add per-type reduction costs to the vector cost model

rs6000: Add MPCCORE to TARGET_NO_LWSYNC to avoid illegal instructions.

Fri, 22 May 2026 00:00:00 GMT

GCC avoids generating `lwsync` instructions on MPC8xx PowerQUICC cores, which can cause crashes due to hardware limitations.

Constant divisions are not converted to multiplications with -O3

Thu, 21 May 2026 00:00:00 GMT

GCC with -O3 doesn't always turn divisions by constants into multiplications; -freciprocal-math enables this optimization at the cost of precision.

Is it time to take middle-end stringop/array warnings out of -Wall?

Thu, 21 May 2026 00:00:00 GMT

Martin suggests new warning categories for memory-safety issues with aggressive warnings for potential safety problems.

Reminder - FOSSY 2026 toolchain track North America, deadlines

Thu, 21 May 2026 00:00:00 GMT

Submit talk proposals for the toolchain track at FOSSY 2026 by June 1st.

AArch64: Prefer w-regs for 32-Bit Move Immediate

Thu, 21 May 2026 00:00:00 GMT

GCC now uses w-registers for 32-bit immediate moves on AArch64, potentially improving code density and performance.

AVR: Overhaul CLZ, CTZ and FFS instructions with hard-reg constraints.

Thu, 21 May 2026 00:00:00 GMT

Improves CLZ, CTZ, and FFS instruction handling for AVR by using hard-reg constraints and code iterators.

'this' capture in template

Thu, 21 May 2026 00:00:00 GMT

Fixed an issue where the 'const' qualifier was dropped from 'this' capture proxies in templates.

Fixes name handling in coroutine lowering for C++26.

Thu, 21 May 2026 00:00:00 GMT

Fixes a miscompilation in C++26 coroutines by ensuring unique names for compiler-generated variables, avoiding conflicts when multiple unnamed variables exist…

Fixes ICE with BIND(C) and PRIVATE in Fortran.

Thu, 21 May 2026 00:00:00 GMT

Fixes an internal compiler error in Fortran when using BIND(C) and PRIVATE attributes together, by improving symbol lookup for private entities.

Adjusts IPA-CP cloning heuristics to reduce code size.

Thu, 21 May 2026 00:00:00 GMT

Adjusts interprocedural constant propagation (IPA-CP) cloning heuristics to reduce excessive code growth by increasing the cost/benefit threshold.

Libffi: Update list of local patches

Thu, 21 May 2026 00:00:00 GMT

The list of local patches applied to libffi within GCC has been updated.

Integrate libffi build with GCC

Thu, 21 May 2026 00:00:00 GMT

The libffi build process is now integrated with GCC's build system.

Integrate libffi testsuite with GCC testsuite

Thu, 21 May 2026 00:00:00 GMT

The libffi testsuite is now integrated with the GCC testsuite.

Sync with libffi 3.5.2

Thu, 21 May 2026 00:00:00 GMT

The libffi submodule has been synchronized with upstream libffi version 3.5.2.

Libffi: Remove debugging output

Thu, 21 May 2026 00:00:00 GMT

A debugging warning in libffi that caused test failures has been removed.

Libffi: Always define `WIN32_LEAN_AND_MEAN` before

Thu, 21 May 2026 00:00:00 GMT

`WIN32_LEAN_AND_MEAN` is now always defined before including `` in libffi to reduce header pollution.

Libstdc++: Combine duplicated tests for

Thu, 21 May 2026 00:00:00 GMT

Redundant C++20-specific tests for are removed and merged into the C++0x tests.

Libstdc++: Add missing constraints to vector and deque deduction guides

Thu, 21 May 2026 00:00:00 GMT

Adds constraints to `vector` and `deque` deduction guides to ensure they only accept valid allocator types.

Libstdc++: Deprecate std::memory_order::consume

Thu, 21 May 2026 00:00:00 GMT

Deprecates `std::memory_order::consume` in libstdc++ as part of implementing P3475R2.

Libstdc++: Fix recent std::flat_map test with COW std::string

Thu, 21 May 2026 00:00:00 GMT

The std::flat_map test is fixed to disable constant evaluation when std::string is not constexpr.

Update email address in MAINTAINERS file

Thu, 21 May 2026 00:00:00 GMT

The maintainer's email address was updated in the MAINTAINERS file.

GCC now handles `X != INT_MIN ? -X : INT_MIN` without bailing out.

Thu, 21 May 2026 00:00:00 GMT

GCC optimizes a conditional negation involving `INT_MIN` by using an unsigned negation to avoid undefined behavior.

Regenerate RISC-V opt URLs.

Thu, 21 May 2026 00:00:00 GMT

Regenerates `riscv.opt.urls` to restore the trailing blank line.

Ada fixes finalize address for arrays of protected types

Thu, 21 May 2026 00:00:00 GMT

GCC's Ada compiler now correctly calculates finalization addresses for arrays of protected types, preventing crashes.

De-duplicate '#define _GNU_SOURCE' in libgomp/config/linux/allocator.c

Thu, 21 May 2026 00:00:00 GMT

The `_GNU_SOURCE` macro is de-duplicated in `libgomp/config/linux/allocator.c`, resolving a minor redundancy.

'#define _GNU_SOURCE' in 'libgomp/plugin/plugin-gcn.c'

Thu, 21 May 2026 00:00:00 GMT

'#define _GNU_SOURCE' in 'libgomp/plugin/plugin-gcn.c'

Is it time to take the middle-end stringop/array warnings out of -Wall?

Wed, 20 May 2026 00:00:00 GMT

Jonathan Wakely argues for removing middle-end stringop/array warnings from -Wall due to high false positive rates and lack of actionable information.

Is it time to take the middle-end stringop/array warnings out of -Wall?

Wed, 20 May 2026 00:00:00 GMT

Richard Biener agrees it may be time to move middle-end stringop/array warnings out of -Wall.

PowerPC GCC maintainer

Wed, 20 May 2026 00:00:00 GMT

Michael Meissner proposes himself as a GCC PowerPC maintainer to address bandwidth issues.

Should stringop/array warnings move from -Wall to -Wextra?

Wed, 20 May 2026 00:00:00 GMT

Debate continues on whether certain GCC warnings about string and array operations should be moved from `-Wall` to `-Wextra` due to high false-positive rates.

aarch64: Add bitreverse expanders [PR50481]

Wed, 20 May 2026 00:00:00 GMT

aarch64: Add bitreverse expanders [PR50481]

Algol68 Now Accepts FLOOR As Synonym for ENTIER

Wed, 20 May 2026 00:00:00 GMT

The Algol68 frontend now recognizes `FLOOR` as an alternative name for the `ENTIER` operator, which rounds a real number towards negative infinity.

analyzer: Add Pointer Difference Folding

Wed, 20 May 2026 00:00:00 GMT

The static analyzer now folds pointer subtraction expressions, allowing it to better handle `std::string::size()` on non-empty strings.

arc: Check If The Addend Fits When Referencing Small Data Memory

Wed, 20 May 2026 00:00:00 GMT

The compiler now checks if the offset fits when accessing small data memory on ARC, preventing potential linker errors.

Fix ICE in variadic using-declaration with conversion functions.

Wed, 20 May 2026 00:00:00 GMT

Fixes an internal compiler error (ICE) when using variadic using-declarations with conversion functions due to incorrect argument rewriting.

Cobol: Add assertion to prevent false array-bounds warning.

Wed, 20 May 2026 00:00:00 GMT

An assertion was added to symfind.cc to avoid a false positive from -Warray-bounds when compiling COBOL code with std::vector.

cselib: Simplify references_value_p

Wed, 20 May 2026 00:00:00 GMT

The function `references_value_p` in cselib is simplified by removing an unused parameter and converting it to use iterators, potentially improving compile tim…

cselib: Optimize Value Invalidation by Avoiding Repeated discard_useless_locs

Wed, 20 May 2026 00:00:00 GMT

This commit optimizes value invalidation in `cselib` by avoiding the repeated discarding of useless locations, improving compile time, especially with RTL chec…

cselib: Cache CSELIB_VAL_PTR in new_elt_loc_list

Wed, 20 May 2026 00:00:00 GMT

This commit caches `CSELIB_VAL_PTR` in `new_elt_loc_list` for improved readability and minor optimization.

Fixes Inlining of Matmul With -fno-automatic in Fortran

Wed, 20 May 2026 00:00:00 GMT

This commit fixes an issue where allocatable arrays used for front-end optimization caused problems when inlining matmul with the `-fno-automatic` flag.

I386: Use vpaddq + vpermilpd for some non-const permutations

Wed, 20 May 2026 00:00:00 GMT

The compiler now uses `vpaddq` and `vpermilpd` to implement certain vector permutations on x86, improving performance.

i386: Fix Peephole2s With const359_operand

Wed, 20 May 2026 00:00:00 GMT

Fixes an ICE on i386 by ensuring peephole optimizations for multiplications avoid using the stack pointer as an index register.

The C++ front end does not use extensions

Wed, 20 May 2026 00:00:00 GMT

Clarified that the C++ front end in GCC does not use extensions.

Simplify (T)(x) == (T)(y) to (T)(x ^ y) == 0 in match.pd

Wed, 20 May 2026 00:00:00 GMT

The compiler now simplifies equality comparisons between narrowed integral types by converting them into XOR operations against zero.

RISC-V: Adds RVV main-loop overhead comparison in cost model

Wed, 20 May 2026 00:00:00 GMT

GCC now compares RISC-V RVV main-loop overhead in the cost model to favor loop elimination.

Add Reduced Test For -fanalyzer On std::string

Wed, 20 May 2026 00:00:00 GMT

A new test case was added to verify the fix for a false positive in the static analyzer related to std::string.

Add libstdc++ -fanalyzer Test Coverage

Wed, 20 May 2026 00:00:00 GMT

Added minimal test coverage for `-fanalyzer`'s handling of basic libstdc++ usage, providing end-to-end testing of the interaction between the static analyzer a…

Add analyzer-torture.exp

Wed, 20 May 2026 00:00:00 GMT

Introduces a new testsuite script, `analyzer-torture.exp`, to run analyzer torture tests.

Tree-CFGCleanup Retains Forwarder Blocks with PHIs and Abnormal Uses

Wed, 20 May 2026 00:00:00 GMT

The compiler now avoids incorrectly removing forwarder blocks that contain PHI nodes with abnormal uses, preventing potential code generation issues.

Ada fixes internal error on abstract primitive with access result

Wed, 20 May 2026 00:00:00 GMT

GCC's Ada front end correctly sets the scope for derived subprogram access types, resolving an internal error.

Ada now validates intrinsic subprograms declared with aspects

Wed, 20 May 2026 00:00:00 GMT

GCC's Ada front end now correctly validates intrinsic subprograms whether they are declared via pragmas or language aspects, preventing potential miscompilatio…

arm: support star-mc3 CPU

Wed, 20 May 2026 00:00:00 GMT

arm: support star-mc3 CPU

aarch64: mingw: Enable init priority order.

Tue, 19 May 2026 00:00:00 GMT

Enables init priority order for aarch64-w64-mingw32, which is required for winpthreads and allows building from upstream repos.

AArch64: Testsuite: Update pr123748.c to use "long long" instead of "long"

Tue, 19 May 2026 00:00:00 GMT

Updates a test case to use "long long" instead of "long" to ensure correct behavior on MinGW AArch64.

analyzer: fix pointer comparisons

Tue, 19 May 2026 00:00:00 GMT

Fixes a bug in the static analyzer that caused false positives due to incorrect pointer comparison logic.

analyzer: bulletproof binop_svalue::maybe_get_value_range_1

Tue, 19 May 2026 00:00:00 GMT

Adds a type check to prevent crashes in the static analyzer when handling binary operations.

AVR: Add insns and libgcc functions for __builtin_bitreverse16/32.

Tue, 19 May 2026 00:00:00 GMT

AVR: Add insns and libgcc functions for __builtin_bitreverse16/32.

AVR: Add bitreverseqi2 insns.

Tue, 19 May 2026 00:00:00 GMT

AVR: Add bitreverseqi2 insns.

Another constexpr empty class tweak

Tue, 19 May 2026 00:00:00 GMT

Improved constexpr handling for empty class types by checking for empty fields during subobject initialization.

Fix bogus error with xobj member function

Tue, 19 May 2026 00:00:00 GMT

Fixed a false positive error in C++ parsing related to xobj member functions and requires clauses.

Fixes typos in comments and diagnostics.

Tue, 19 May 2026 00:00:00 GMT

Corrects several minor typos across GCC's source code, improving readability and code quality.

Fortran: Fixes data corruption with allocatable array components.

Tue, 19 May 2026 00:00:00 GMT

This commit resolves a data corruption issue in Fortran when passing non-contiguous slices of allocatable arrays to procedures expecting g77-style arguments.

rs6000: Add missing ISA 3.0 atomic memory operation instructions

Tue, 19 May 2026 00:00:00 GMT

GCC now supports additional atomic memory operation instructions for the rs6000 architecture's ISA 3.0.

stack_usage: Print out the user visibility name, too

Tue, 19 May 2026 00:00:00 GMT

The GCC stack usage tool now prints human-readable function names alongside mangled names.

i386: Optimize ptestz(x,-1) as ptestz(x,x) on x86

Tue, 19 May 2026 00:00:00 GMT

i386: Optimize ptestz(x,-1) as ptestz(x,x) on x86

i386: Return wider vectors in registers for x86_64 MS ABI.

Tue, 19 May 2026 00:00:00 GMT

Enables returning 256-bit and 512-bit vectors in registers for x86_64 MS ABI, improving code generation for AVX/AVX512.

i386: Use vpermilps for some non-const permutations [PR125357]

Tue, 19 May 2026 00:00:00 GMT

i386: Use vpermilps for some non-const permutations [PR125357]

libstdc++: Fix Build Failures After acfdad706d8

Tue, 19 May 2026 00:00:00 GMT

This commit fixes build failures in libstdc++ caused by a recent commit.

libstdc++: Use #embed For Static tzdata.zi File

Tue, 19 May 2026 00:00:00 GMT

The libstdc++ now uses `#embed` to include the `tzdata.zi` file, simplifying the build process.

Libstdc++: Split and only include it in [PR125371]

Tue, 19 May 2026 00:00:00 GMT

Splits `` into smaller headers and includes them selectively to avoid unnecessary forward declarations and improve compiler fix-it hints.

Deprecates numeric_limits::has_denorm for C++23.

Tue, 19 May 2026 00:00:00 GMT

Deprecates `numeric_limits::has_denorm` and related features in libstdc++ for C++23, following the P2614R2 paper.

Fixes incorrect move operation in flat_map emplace.

Tue, 19 May 2026 00:00:00 GMT

The libstdc++ `flat_map` now correctly forwards the key in `_M_try_emplace`, preventing potential issues when inserting new elements.

MAINTAINERS: Sort the CPU maintainers entries.

Tue, 19 May 2026 00:00:00 GMT

The `CPU Maintainers` section in `MAINTAINERS` is now sorted by CPU architecture and then user.

MAINTAINERS: Sort the OS Port Maintainers.

Tue, 19 May 2026 00:00:00 GMT

The `OS Port Maintainers` section in `MAINTAINERS` is now sorted by operating system and then user.

MAINTAINERS: Sort the Language Front Ends Maintainers.

Tue, 19 May 2026 00:00:00 GMT

The `Language Front Ends Maintainers` section in `MAINTAINERS` is now sorted by language and then maintainer.

MAINTAINERS: Sort the Reviewers.

Tue, 19 May 2026 00:00:00 GMT

Sort the MAINTAINERS file's `Reviewers` section by area and then user.

MAINTAINERS: Improve checking in check-MAINTAINERS.py.

Tue, 19 May 2026 00:00:00 GMT

Enhances the check-MAINTAINERS.py script with stricter sorting and regex-based field matching.

MAINTAINERS: Improve Write After Approval sort.

Tue, 19 May 2026 00:00:00 GMT

Improve the MAINTAINERS sort for Write After Approval by adding a secondary sort by email address.

MAINTAINERS: Sort various maintainers.

Tue, 19 May 2026 00:00:00 GMT

Sort the MAINTAINERS file's `Various Maintainers` section by area and then name, clarifying formatting.

MAINTAINERS: Sort DCO entries by email address.

Tue, 19 May 2026 00:00:00 GMT

Sorts the DCO section of the MAINTAINERS file secondarily by email address.

OpenMP: Fortran "!$omp declare mapper" parser support

Tue, 19 May 2026 00:00:00 GMT

Adds support for the OpenMP declare mapper directive in Fortran.

optabs: Handle bitreverse using widening or two bitreverses of halves [PR50481]

Tue, 19 May 2026 00:00:00 GMT

optabs: Handle bitreverse using widening or two bitreverses of halves [PR50481]

RISC-V: Fix several bugs in macro fusion logic.

Tue, 19 May 2026 00:00:00 GMT

This patch fixes correctness and minor issues in the RISC-V macro fusion logic, including incorrect checks and typos.

RISC-V: Use table-driven dispatch in riscv-fusion.cc.

Tue, 19 May 2026 00:00:00 GMT

The RISC-V macro fusion logic now uses a table-driven approach to simplify and extend instruction fusion.

Testsuite: Update CRC dump scan regex for reversed crc table

Tue, 19 May 2026 00:00:00 GMT

Updates testsuite regexes to match the new "emitting reversed crc table" message in CRC table dumps.

Removed an unused global variable from the Ada front end

Tue, 19 May 2026 00:00:00 GMT

A global variable previously used for a GNAT Pro variant has been removed from the Ada front end, cleaning up dead code.

C++ frontend improves alias recognition with lambda template arguments

Tue, 19 May 2026 00:00:00 GMT

GCC's C++ frontend now more efficiently recognizes aliases involving lambda template arguments, leading to minor compilation speed improvements.

Fixes ambiguous exploded_cluster and dump_args_t type mismatches

Mon, 18 May 2026 00:00:00 GMT

This PR fixes compilation failures in the analyzer engine due to ambiguous class references and type mismatches.

Fixes various compiler warnings

Mon, 18 May 2026 00:00:00 GMT

This PR resolves compiler warnings related to formatting, uninitialized variables, non-virtual destructors, and unused variables in GCC.

Proposes factoring common pure operations across PHIs

Mon, 18 May 2026 00:00:00 GMT

Guoce Feng proposes an optimization to factor out common pure operations like `sqrt` across PHIs and branches to reduce redundant calls, especially in vectoriz…

Proposes initial patches for GSoC contribution

Mon, 18 May 2026 00:00:00 GMT

Zeinab Ayman proposes patches to fix compiler warnings in diagnostics and analyzer modules as part of a GSoC application.

Reports download_prerequisites failing from AWS

Mon, 18 May 2026 00:00:00 GMT

Haochen Jiang reports that `download_prerequisites` script fails with a 403 Forbidden error when run on AWS systems, suspecting potential IP blocking.

AArch64 introduces partial AdvSIMD vector modes.

Mon, 18 May 2026 00:00:00 GMT

GCC now supports partial (16- and 32-bit) AdvSIMD vector modes on AArch64 for duplication into full-sized registers.

Analyzer parameter renamed for clarity on supernode explosion factor.

Mon, 18 May 2026 00:00:00 GMT

The analyzer's `-param=analyzer-bb-explosion-factor=` is now `-param=analyzer-supernode-explosion-factor=` to better reflect its function after a recent change.

Analyzer: Remove unused field in exploded_node.

Mon, 18 May 2026 00:00:00 GMT

The `exploded_node::m_num_processed_stmts` field in the GCC static analyzer is no longer used and has been removed.

Fix MASM ptwrite output for Intel syntax

Mon, 18 May 2026 00:00:00 GMT

Fixes incorrect MASM ptwrite output when using Intel syntax by using an alternative code sequence.

Improve SI->DI zero/sign extension patterns for RISC-V

Mon, 18 May 2026 00:00:00 GMT

Improves code generation for zero-extension on RISC-V by using shift pairs when Zba/Zbb extensions are unavailable.

Improve ext-dce's live bit tracking for IOR/AND with a constant argument

Mon, 18 May 2026 00:00:00 GMT

Improves dead code elimination by tracking live bits for IOR/AND operations with constant arguments.

Update Swedish translation for GCC.

Mon, 18 May 2026 00:00:00 GMT

This commit updates the Swedish translation file (sv.po) for GCC.

Modernize optrecord JSON writer with smart pointers.

Mon, 18 May 2026 00:00:00 GMT

The `optrecord_json_writer` class is updated to use modern C++ features like `std::unique_ptr` for memory management.

LoongArch: Rename rbit to bitreverse for consistency.

Mon, 18 May 2026 00:00:00 GMT

The LoongArch-specific reverse-bits builtin is now named bitreverse instead of rbit to match standard optab names.

mingw: GCC now identifies function ends by checking for .seh_endproc directives.

Mon, 18 May 2026 00:00:00 GMT

GCC can now identify the end of functions in MinGW binaries by checking for the .seh_endproc directive.

x86: Avoid inlining cold memmove calls in size-optimised code.

Mon, 18 May 2026 00:00:00 GMT

GCC now avoids inlining calls to memmove when optimizing for size, for rarely-executed code paths on x86.

i386: Implement bitreverse2 optab for GFNI

Mon, 18 May 2026 00:00:00 GMT

GCC now uses the GFNI instruction set to accelerate bit reversal operations on x86 when compiling with `-mgfni` and `-msse2`.

JIT: Clarify documentation for adding compiler options.

Mon, 18 May 2026 00:00:00 GMT

The documentation for `gcc_jit_context_add_command_line_option` and `gcc_jit_context_add_driver_option` now explicitly states that multiple options require mul…

libstdc++: Make is_exhaustive const for layout_(left/right)_padded

Mon, 18 May 2026 00:00:00 GMT

The `is_exhaustive` member function for `layout_left_padded` and `layout_right_padded` in libstdc++ is now correctly marked as `const`.

libstdc++: Make chrono::parse fail for bad %z [PR125369]

Mon, 18 May 2026 00:00:00 GMT

libstdc++: Make chrono::parse fail for bad %z [PR125369]

libstdc++: Move std::bitset test to correct directory

Mon, 18 May 2026 00:00:00 GMT

Moves a std::bitset test file to the correct directory in the libstdc++ testsuite.

libstdc++: Dangling braced-init-list access is now ill-formed.

Mon, 18 May 2026 00:00:00 GMT

Accessing dangling braced-init-list using `std::begin`, `std::end`, and `std::data` is now ill-formed, as per P3016R6.

LoongArch: Fix missing plugin header for cpu-features.h

Mon, 18 May 2026 00:00:00 GMT

Fixes a build failure when compiling GCC plugins that include target headers on LoongArch due to a missing header file.

Adds Zilsd alignment control options for RISC-V.

Mon, 18 May 2026 00:00:00 GMT

Introduces `-mzilsd-word-align` and `-mzilsd-strict-align` options to control alignment policies for RISC-V Zilsd/Zclsd doubleword memory accesses.

RISC-V: Add intrinsic detection macros for compiler support.

Mon, 18 May 2026 00:00:00 GMT

Adds macros to detect compiler support for RISC-V intrinsic APIs, independent of the target architecture.

RISC-V: Add XuanTie C950 (xt-c9501fdvt) CPU support

Mon, 18 May 2026 00:00:00 GMT

Adds support for the XuanTie C950 (xt-c9501fdvt) RISC-V CPU in GCC.

Testsuite: Fix pr112095.c for vector lowering

Mon, 18 May 2026 00:00:00 GMT

Modifies test case pr112095.c to correctly test vector lowering.

tree-optimization: Fix profile update in loop splitting (initial_true=false)

Mon, 18 May 2026 00:00:00 GMT

Fixes a bug in loop splitting that caused incorrect profile updates when the loop guard condition is inverted.

RX: Correct the size of mov instruction

Mon, 18 May 2026 00:00:00 GMT

This patch fixes incorrect code generation in the RX backend when expanding `extendqisi2` or `extendhisi2` operations.

Ada reuses Is_Rewrite_Substitution where possible

Mon, 18 May 2026 00:00:00 GMT

The Ada front end refactors code to consolidate checks using `Is_Rewrite_Substitution` for clarity.

Ada unbounded holder no longer dereferences null pointers

Mon, 18 May 2026 00:00:00 GMT

GCC's Ada runtime for `Bounded_Indefinite_Holders` now checks for empty holders before dereferencing, preventing null pointer errors.

Ada accessibility check function renamed for clarity

Mon, 18 May 2026 00:00:00 GMT

A function that checks accessibility in Ada has been renamed to better reflect its broader use beyond just parameters, improving code readability.

Ada: Text_IO now raises Data_Error for out-of-range input.

Mon, 18 May 2026 00:00:00 GMT

The Ada compiler now correctly raises `Data_Error` instead of `Constraint_Error` for out-of-range input in `Text_IO` functions, conforming to the Ada Reference…

Ada return objects now recognize local anonymous access types

Mon, 18 May 2026 00:00:00 GMT

GCC's Ada compiler now correctly flags the anonymous access types of return objects as local, aligning with Ada 2012 rules for preventing standalone objects.

Switch-conv: Stabilize qsort in case_bit_test by using target BB index.

Sun, 17 May 2026 00:00:00 GMT

The switch conversion code now uses the target basic block index to stabilize qsort, removing the need for a label in `case_bit_test`.

Reflows lines made longer than 80 characters by typo fixes

Sun, 17 May 2026 00:00:00 GMT

This commit reflows lines in various files that exceeded 80 characters due to recent typo fixes.

libstdc++: Reduce iterations in PSTL test for Debug Mode to avoid timeouts.

Sun, 17 May 2026 00:00:00 GMT

The number of iterations in a libstdc++ test for the Parallel STL (PSTL) is reduced when Debug Mode is enabled to prevent timeouts.

RISC-V: Add C API and hwprobe bit for the zicfiss extension.

Sun, 17 May 2026 00:00:00 GMT

Adds metadata and runtime feature-bit probing for the RISC-V zicfiss extension, aligning with the C API and Linux hwprobe.

RISC-V: Map existing extensions to Linux hwprobe constants.

Sun, 17 May 2026 00:00:00 GMT

Adds mappings between existing RISC-V extensions and their corresponding Linux hwprobe bits, enabling runtime feature detection.

RISC-V: Add C API feature bits for multiple extensions.

Sun, 17 May 2026 00:00:00 GMT

Adds RISC-V C API feature bit metadata for multiple extensions, enabling detection of these extensions.

RISC-V: Add C API feature bits for existing extensions.

Sun, 17 May 2026 00:00:00 GMT

Adds missing C API feature bits for existing RISC-V extensions, improving feature detection.

Testsuite: Fixes failures after typo fixes

Sun, 17 May 2026 00:00:00 GMT

Updates testsuite checks to match changes introduced by recent typo fixes.

tree: Move unshare_expr from gimplifier to generic tree

Sun, 17 May 2026 00:00:00 GMT

tree: Move unshare_expr from gimplifier to generic tree

x86: Avoid inlining memmove at -Os.

Sun, 17 May 2026 00:00:00 GMT

The compiler will no longer inline memmove when optimizing for size on x86, which should reduce code size.

ada: Simplify construction of internal string from characters

Sun, 17 May 2026 00:00:00 GMT

ada: Simplify construction of internal string from characters

Simplify code with membership test

Sun, 17 May 2026 00:00:00 GMT

The Ada compiler's `Is_Definite_Subtype` function was simplified using a membership test, improving code clarity without altering behavior.

Add assertions to Fully_Qualified_Name_String

Sun, 17 May 2026 00:00:00 GMT

The Ada front end now ensures correct function behavior by adding assertions to `Full_Qualified_Name_String` to validate its inputs and outputs.

Sourceware @ Conservancy Year Three

Sat, 16 May 2026 00:00:00 GMT

Sourceware highlights its activities and achievements over the past year as a Conservancy member project, including infrastructure improvements and community e…

Add __builtin_bitreverse128 intrinsic.

Sat, 16 May 2026 00:00:00 GMT

Introduces the `__builtin_bitreverse128` intrinsic for reversing the bit order of 128-bit integers.

Fortran: Emit correct prototypes for procedures defined via INTERFACE.

Sat, 16 May 2026 00:00:00 GMT

Fixes prototype generation for Fortran procedures defined via an interface block.

Fix libcaf_shmem build on Solaris.

Sat, 16 May 2026 00:00:00 GMT

This commit fixes a build failure for libcaf_shmem on Solaris by renaming a conflicting type definition.

libgomp: Fix compilation on Darwin by checking GOMP_DEFAULT_STACKSIZE.

Sat, 16 May 2026 00:00:00 GMT

Fixes a Darwin-specific libgomp compilation error due to a constant logical operand with GOMP_DEFAULT_STACKSIZE.

Remove Solaris workaround in float128 to_chars test.

Sat, 16 May 2026 00:00:00 GMT

Removes a Solaris-specific workaround in a libstdc++ test case, enabling the full test suite.

match.pd: Enable bswap optimizations for bitreverse builtins.

Sat, 16 May 2026 00:00:00 GMT

Extends existing bswap optimizations in match.pd to also cover bitreverse builtins.

tree-ssa-ccp: Correctly handle __builtin_bitreverse*.

Sat, 16 May 2026 00:00:00 GMT

Fixes bitwise constant propagation (CCP) for `__builtin_bitreverse*` intrinsics.

Uncprop: Optimize compile time by storing only switch case values.

Sat, 16 May 2026 00:00:00 GMT

The compiler now stores only the case value instead of the entire CASE_LABEL_EXPR for switch statements, improving compile time.

x86_64: Enable STV conversion for TImode register moves.

Sat, 16 May 2026 00:00:00 GMT

Extends x86_64's Scalar-To-Vector (STV) pass to handle TImode register moves with hard registers.

Improve the accuracy of Function_Call_Or_Allocator_Level

Sat, 16 May 2026 00:00:00 GMT

The Ada compiler's `Function_Call_Or_Allocator_Level` now correctly determines the accessibility level for object declarations, mirroring `Accessibility_Level`.

Ada accessibility function `Effective_Extra_Accessibility` removed

Sat, 16 May 2026 00:00:00 GMT

The redundant `Effective_Extra_Accessibility` function has been removed from the Ada front end, as `Extra_Accessibility` now handles object renamings automatic…

Disable a couple of static accessibility checks in dynamic cases

Sat, 16 May 2026 00:00:00 GMT

The Ada compiler now correctly applies accessibility rules for dynamic contexts by disabling certain static checks.

c++: Remove dead code

Fri, 15 May 2026 00:00:00 GMT

Removes dead code from the cxx_eval_bare_aggregate function in constexpr.cc.

Handles constexpr nested empty objects correctly.

Fri, 15 May 2026 00:00:00 GMT

GCC now correctly handles nested empty objects in constexpr contexts, preventing errors during compile-time evaluation.

Fixes constexpr crash with nested empty objects.

Fri, 15 May 2026 00:00:00 GMT

This commit prevents a crash in constexpr evaluation when dealing with nested empty objects by avoiding premature calls to `get_or_insert_ctor_field`.

Caller_save_regs: Return the enabled registers.

Fri, 15 May 2026 00:00:00 GMT

GCC now only considers enabled registers when determining caller-saved registers, fixing a potential optimization issue.

Dom: Optimize compile time by storing only switch case values.

Fri, 15 May 2026 00:00:00 GMT

The compiler now stores only the case value instead of the entire CASE_LABEL_EXPR for switch statements in the dominator tree, improving compile time.

OpenMP 5.0: Enables multiple map clauses for the same variable.

Fri, 15 May 2026 00:00:00 GMT

GCC now supports OpenMP 5.0's allowance of multiple map clauses on the same variable, requiring deduplication to avoid cycles during gimplification.

AArch64: Fix support for POSIX threads on MinGW

Fri, 15 May 2026 00:00:00 GMT

GCC now correctly supports POSIX threads when targeting AArch64 MinGW environments.

Adds __builtin_bitreverse{8,16,32,64} builtins.

Fri, 15 May 2026 00:00:00 GMT

GCC now provides built-in functions for bit reversal of 8, 16, 32, and 64-bit integers, potentially optimized for specific targets.

Introduces -Wconstant-logical-operand warning.

Fri, 15 May 2026 00:00:00 GMT

GCC now warns about constant values used as operands in logical expressions (&&, ||), which are often typos.

ssa_operands: Speed up GIMPLE_SWITCH handling

Fri, 15 May 2026 00:00:00 GMT

GCC's SSA operand scanner now processes only the index operand of GIMPLE_SWITCH statements, improving performance.

Testsuite: Fix Wuninitialized-pr107919-1.C

Fri, 15 May 2026 00:00:00 GMT

The test case 'Wuninitialized-pr107919-1.C' in GCC's testsuite has been fixed to avoid false positives.

HPPA64: Use aligned encoding for EH data on 64-bit HP-UX.

Fri, 15 May 2026 00:00:00 GMT

GCC now uses aligned Dwarf EH encodings on HP-UX due to dynamic linker limitations.

Fixes handling of IEEE min/max instructions on x86.

Fri, 15 May 2026 00:00:00 GMT

GCC's x86 backend now correctly handles IEEE min/max instructions, ensuring proper register usage and preventing incorrect code generation.

ICF: Remove redundant check for CASE_LABEL_EXPR.

Fri, 15 May 2026 00:00:00 GMT

Removes a redundant check in the compiler's identical code folding pass, simplifying the code.

libstdc++: Fix atomic check on Windows for MinGW builds.

Fri, 15 May 2026 00:00:00 GMT

Fixes configure check for atomics on native MinGW-w64 builds in libstdc++.

libstdc++: Add begin, end, (const_)iterator members to valarray.

Fri, 15 May 2026 00:00:00 GMT

Implements P3016R6 by adding iterator support to `std::valarray` in libstdc++.

Libstdc++: Use IANA name for ISO-8859-1 in format tests.

Fri, 15 May 2026 00:00:00 GMT

Libstdc++ format tests now consistently use the IANA name for ISO-8859-1 encoding and require iconv support.

Fixes SSP assembly generation with xtheadmemidx extension in RISC-V.

Fri, 15 May 2026 00:00:00 GMT

Fixes stack smashing protection (SSP) assembly generation for RISC-V when the xtheadmemidx extension is enabled, using correct move instructions.

Adds a testcase for consteval-only types.

Fri, 15 May 2026 00:00:00 GMT

A new test case was added to ensure that consteval-only type computations in GCC are not quadratic in complexity.

Testsuite: Add AArch64 SVE support to slp-reduc-15.c

Fri, 15 May 2026 00:00:00 GMT

The slp-reduc-15.c test now supports AArch64 SVE and uses -mavx2 for x86 to cover all x86 modes.

RFC: GCC support for masked compress stores and VPCOMPRESS codegen

Thu, 14 May 2026 00:00:00 GMT

Proposes extending GCC's loop vectorizer to generate AVX-512 VPCOMPRESS instructions for predicated stores into a buffer.

AVR: Make -mno-call-main work with -flto.

Thu, 14 May 2026 00:00:00 GMT

The -mno-call-main option now works correctly with -flto by using --defsym to avoid multiple definitions of __call_main.

c++: capture of reference to global in template

Thu, 14 May 2026 00:00:00 GMT

Fixes a bug in C++ that caused a crash when capturing a reference to a global variable in a template lambda.

c++/reflection: undeduced auto, deferred noexcept [PR124628]

Thu, 14 May 2026 00:00:00 GMT

c++/reflection: undeduced auto, deferred noexcept [PR124628]

Drop unused parameters to restore bootstrap

Thu, 14 May 2026 00:00:00 GMT

Drop unused parameters to restore bootstrap

Fix typos in various gcc/[s-z]* files

Thu, 14 May 2026 00:00:00 GMT

Corrects typos in various GCC source files, specifically those under the `gcc/` directory with names starting from 's' to 'z'.

PR fortran/125092 - implement for binding label argument mismatch.

Thu, 14 May 2026 00:00:00 GMT

PR fortran/125092 - implement for binding label argument mismatch.

Fix typos in various gcc/[o-r]* files

Thu, 14 May 2026 00:00:00 GMT

Corrects typos in multiple GCC source files, specifically those under the `gcc/` directory with names starting from 'o' to 'r'.

Fix typos in various gcc/[a-d]* files

Thu, 14 May 2026 00:00:00 GMT

Corrects typos in various GCC source files, specifically those under the `gcc/` directory with names starting from 'a' to 'd'.

Fix typos in various gcc/[e-m]* files

Thu, 14 May 2026 00:00:00 GMT

Corrects typos in various GCC source files, specifically those under the `gcc/` directory with names starting from 'e' to 'm'.

Fold `popcount(x ^ (x - 1))` to `ctz(x) + 1` when supported

Thu, 14 May 2026 00:00:00 GMT

GCC now transforms `popcount(x ^ (x - 1))` into `ctz(x) + 1` when compiling for architectures that directly support the count trailing zeros instruction.

pr124532: Reset musttail attribute in compound statements

Thu, 14 May 2026 00:00:00 GMT

GCC now resets the 'musttail' attribute after a statement in a compound statement, fixing bogus errors.

tree-cfg: Revert code that incorrectly removed case labels

Thu, 14 May 2026 00:00:00 GMT

GCC has reverted a change that incorrectly removed case labels, fixing optimizations and a switch statement issue.

i386: Remove TARGET_SHIFT1 Tuning Feature

Thu, 14 May 2026 00:00:00 GMT

The `TARGET_SHIFT1` tuning feature for i386 is removed, simplifying shift instruction encoding.

Libatomic: Corrected typos in multiple files.

Thu, 14 May 2026 00:00:00 GMT

This commit fixes typos in various libatomic files.

Libbacktrace: Correct typos in source files.

Thu, 14 May 2026 00:00:00 GMT

This commit fixes typos across multiple libbacktrace source files.

Libcody: Correct typos in README.md.

Thu, 14 May 2026 00:00:00 GMT

This commit fixes typos in the README.md file for libcody.

Libcpp: Correct typos in source files.

Thu, 14 May 2026 00:00:00 GMT

This commit fixes typos across multiple libcpp source files.

Libdecnumber: Correct typos in source files.

Thu, 14 May 2026 00:00:00 GMT

This commit fixes typos across multiple libdecnumber source files.

Libgcc: Correct typos in source files.

Thu, 14 May 2026 00:00:00 GMT

This commit fixes typos across multiple libgcc source files.

Libgfortran: Correct typos in source files.

Thu, 14 May 2026 00:00:00 GMT

This commit fixes typos across multiple libgfortran source files.

Libgm2: Fix typos in configure.ac.

Thu, 14 May 2026 00:00:00 GMT

This commit fixes typos in the configure.ac file for libgm2.

Libgomp: Correct typos in source files.

Thu, 14 May 2026 00:00:00 GMT

This commit fixes typos across multiple libgomp source files.

libiberty: Fixes typos in various files

Thu, 14 May 2026 00:00:00 GMT

Corrects typos in libiberty, improving code quality and reducing potential for errors.

libitm: Fixes typos in various files

Thu, 14 May 2026 00:00:00 GMT

This commit corrects typos in libitm, improving code quality and reducing potential errors.

libquadmath: Fixes typos in various files

Thu, 14 May 2026 00:00:00 GMT

Corrects typos in libquadmath, improving code clarity and reducing potential errors.

libstdc++: Merge __type_identity and type_identity for C+20.

Thu, 14 May 2026 00:00:00 GMT

libstdc++: Merge __type_identity and type_identity for C+20.

libstdc++: Mark gencanon_eng_neg test as unsupported if __float128 is unavailable.

Thu, 14 May 2026 00:00:00 GMT

The gencanon_eng_neg test is marked as unsupported when __float128 is not available, preventing errors.

libstdc++: Include range_access.h from for C++11 and later.

Thu, 14 May 2026 00:00:00 GMT

The `` header now includes `` for C++11 and later, providing `begin`/`end` support for valarrays.

libstdc++: Include range_access.h from and

Thu, 14 May 2026 00:00:00 GMT

libstdc++ now includes range_access.h in and to implement resolutions for LWG4131 and LWG3625 related to range support.

libstdc++: Fixes typos in various files

Thu, 14 May 2026 00:00:00 GMT

Corrects typos in libstdc++, improving code quality and reducing potential for errors.

libvtv: Fixes typos in various files

Thu, 14 May 2026 00:00:00 GMT

This commit corrects typos in libvtv, enhancing code clarity and reducing potential errors.

lto-plugin: Fixes typos in lto-plugin.c

Thu, 14 May 2026 00:00:00 GMT

Corrects typos in lto-plugin.c, improving code readability and maintainability.

Match.pd: Allow FNMA fold through conversions.

Thu, 14 May 2026 00:00:00 GMT

GCC can now fold FMA operations into FNMA even when type conversions are present, improving AArch64 SVE code generation.

OpenMP: mapper [C/C++] reject w/o map usage, reject C++98, fix map decay

Thu, 14 May 2026 00:00:00 GMT

OpenMP: mapper [C/C++] reject w/o map usage, reject C++98, fix map decay

OpenMP: Improve comments for the omp_deep_mapping language hooks.

Thu, 14 May 2026 00:00:00 GMT

The interface comments for the OpenMP deep mapping language hooks have been improved for clarity.

testsuite: Remove debugging puts from check_profiling_available

Thu, 14 May 2026 00:00:00 GMT

testsuite: Remove debugging puts from check_profiling_available

The Ada front end guards against empty switches in `Getopt`

Thu, 14 May 2026 00:00:00 GMT

The Ada front end's command-line parsing utility `GNAT.Command_Line.Getopt` now safely handles empty switch strings, preventing potential errors.

The Ada front end fixes missing error for deep access results in generics

Thu, 14 May 2026 00:00:00 GMT

The Ada front end now correctly identifies and flags errors when generic functions declare deeply nested access types, enforcing proper accessibility rules.

Question on regression tests

Wed, 13 May 2026 00:00:00 GMT

Discussion about which branch to target for regression tests related to an OpenACC bug fix.

Ada: Fix typos in various files

Wed, 13 May 2026 00:00:00 GMT

This commit corrects typos across multiple Ada-related files in the GCC project.

Analyzer: Correct Typographical Errors in Various Files

Wed, 13 May 2026 00:00:00 GMT

This commit fixes typos in various files within the GCC analyzer, improving code quality.

c++/reflection: Reject invalid annotation on class [PR123609]

Wed, 13 May 2026 00:00:00 GMT

The C++ compiler now rejects invalid attributes on class declarations, improving error reporting.

Doc: Correct Typographical Errors in Documentation Files

Wed, 13 May 2026 00:00:00 GMT

This commit fixes typos in various documentation files, improving clarity and accuracy for GCC users.

CP: Fixes Typographical Errors in C++ Front-End Files

Wed, 13 May 2026 00:00:00 GMT

This commit corrects typos in various C++ front-end files, improving code clarity and maintainability.

D Language: Correct Typographical Errors in Various Files

Wed, 13 May 2026 00:00:00 GMT

This commit resolves typos in multiple files related to the D language support in GCC, improving code quality.

C-Family, C: Fix Typographical Errors in Various Files

Wed, 13 May 2026 00:00:00 GMT

This commit corrects typos in the C language family and C-specific files, enhancing code readability.

Algol68, Libga68: Fix Typographical Errors in Various Files

Wed, 13 May 2026 00:00:00 GMT

This commit corrects typos in multiple Algol68 compiler and runtime library files, improving code readability and maintainability.

Record (de-)composition type in ls_type for VMAT_STRIDED_SLP accesses.

Wed, 13 May 2026 00:00:00 GMT

This commit records vector decomposition information for strided SLP accesses, which will help in target-specific cost modeling.

Fix typos in various Fortran files

Wed, 13 May 2026 00:00:00 GMT

Corrects typos found in multiple Fortran-related source files.

Cobol, Libgcobol: Correct Typographical Errors in Various Files

Wed, 13 May 2026 00:00:00 GMT

Typos are fixed across multiple files in the Cobol compiler and runtime library, improving code quality and readability.

Fix typos in various generator files

Wed, 13 May 2026 00:00:00 GMT

Corrects typos across multiple source files in GCC's code generators.

RISC-V: Avoid late splitting of 64-bit vector extracts on 32-bit targets.

Wed, 13 May 2026 00:00:00 GMT

GCC now avoids emitting 64-bit vector extracts on 32-bit RISC-V targets, fixing a compilation failure.

Jit: Corrected typos in various files.

Wed, 13 May 2026 00:00:00 GMT

This commit fixes typos in the JIT compiler's code and documentation.

Fix typos in various IPA files

Wed, 13 May 2026 00:00:00 GMT

Corrects typos across multiple IPA-related source files.

Fix typos in various GIMPLE files

Wed, 13 May 2026 00:00:00 GMT

Corrects typos in multiple GIMPLE-related source files.

Libgomp.texi: Add the missing closing brace

Wed, 13 May 2026 00:00:00 GMT

Fixes a GCC build error in libgomp.texi due to a missing closing brace.

libgomp: Add stub omp_control_tool for OMPT

Wed, 13 May 2026 00:00:00 GMT

Adds a stub implementation for `omp_control_tool` to libgomp, enabling OpenMP Tooling support.

libstdc++: Use on_month_day istream operator in ZoneInfo parsing.

Wed, 13 May 2026 00:00:00 GMT

libstdc++'s ZoneInfo parsing now uses the `on_month_day` istream operator for more flexible date parsing.

Rebuild configure

Wed, 13 May 2026 00:00:00 GMT

This commit rebuilds the configure script for libstdc++.

Remove trailing whitespace in shared_ptr_atomic.h

Wed, 13 May 2026 00:00:00 GMT

Removed trailing whitespace from a libstdc++ header file.

Add call to test_format in std/time/clock/local/io.cc

Wed, 13 May 2026 00:00:00 GMT

This change adds a missing call to `test_format` in a libstdc++ test file.

Use type_identity_t for operator<=> parameter [PR114400]

Wed, 13 May 2026 00:00:00 GMT

This commit updates the `operator<=>` parameter type in `std::string_view` to use `type_identity_t`.

libstdc++: Prevent overflow in piecewise distribution with empty input.

Wed, 13 May 2026 00:00:00 GMT

Avoids reserving size_t(-1) elements when constructing piecewise_constant_distribution or piecewise_linear_distribution with an empty initializer list.

Libstdc++: Add test for unsupported engine range for 128-bit floats.

Wed, 13 May 2026 00:00:00 GMT

This change adds a test case to libstdc++ to verify that `std::generate_canonical` does not support certain non-power-of-two ranges when used with 128-bit floa…

Lto: Fixed typos in various files.

Wed, 13 May 2026 00:00:00 GMT

This commit fixes typos in the LTO module.

MAINTAINERS: Add myself to write after approval and DCO.

Wed, 13 May 2026 00:00:00 GMT

This commit adds Zhongyao Chen to the MAINTAINERS file with write after approval and DCO rights.

PR124316: Fix ptwrite assembler mode

Wed, 13 May 2026 00:00:00 GMT

PR124316: Fix ptwrite assembler mode

rs6000: Fix [su]mul3_highpart patterns to use RTL codes.

Wed, 13 May 2026 00:00:00 GMT

This commit fixes the `smul` and `umul` highpart patterns on rs6000 to properly generate widened multiply instructions.

Rtl-ssa: Fixes typos in multiple files.

Wed, 13 May 2026 00:00:00 GMT

This commit corrects typos in the rtl-ssa module.

Testsuite: Skip arm/muldi-1.c test case when compiling with -mthumb.

Wed, 13 May 2026 00:00:00 GMT

This commit disables the `muldi-1.c` test on ARM when compiled with `-mthumb` due to an incompatibility.

Testsuite: Move pr123286.c to gcc.target/aarch64/

Wed, 13 May 2026 00:00:00 GMT

Moves a test case to the aarch64-specific directory because it requires AArch64-specific headers.

SCEV now maintains affine CHRECs in the presence of type conversions.

Wed, 13 May 2026 00:00:00 GMT

SCEV analysis is improved to recognize affine loop accesses even with type conversions, enabling better vectorization.

Tree: Corrected typos in various files.

Wed, 13 May 2026 00:00:00 GMT

This commit fixes typos in the tree module of GCC.

Preserve alignment of access during address forwarding.

Wed, 13 May 2026 00:00:00 GMT

GCC now preserves the alignment of memory accesses when forwarding addresses during tree optimization.

Tree-ssa: Fixed typos in various files.

Wed, 13 May 2026 00:00:00 GMT

This commit fixes typos in the tree-ssa module.

Vect: Fixed typos across multiple files.

Wed, 13 May 2026 00:00:00 GMT

Corrected typos in the vectorization module to improve code clarity.

x86: Generate shorter load-immediate constants with -Oz.

Wed, 13 May 2026 00:00:00 GMT

This change reduces code size on x86 by using `xorl` and `movb` to load small constants, replacing larger `movl` instructions at -Oz.

Ada fixes missing error for deep accessibility in aggregate returns.

Wed, 13 May 2026 00:00:00 GMT

GCC's Ada compiler now correctly flags accessibility errors in aggregate returns and refines static accessibility checks for anonymous access types.

Inline for proof without creating extra objects

Wed, 13 May 2026 00:00:00 GMT

The GNATprove tool now avoids creating unnecessary object declarations when inlining subprograms for proof, streamlining its process.

The Ada front end fixes assertion error in subunit attribute references

Wed, 13 May 2026 00:00:00 GMT

The Ada front end now correctly handles attribute references within separate subunits, resolving a compiler `Assertion_Error`.

Advise GSoC student to follow master for regression testing.

Tue, 12 May 2026 00:00:00 GMT

Martin Jambor advises a GSoC student to generally follow master for regression testing unless an issue is specific to a release branch.

Propose warnings for partially-unused structured bindings in C++26.

Tue, 12 May 2026 00:00:00 GMT

In C++26, enable `-Wunused` warnings for unused variables in structured bindings, now that unnamed placeholders are available.

Uncounted loop vectorization example doesn't work with unsigned index

Tue, 12 May 2026 00:00:00 GMT

Richard Biener investigates why certain seemingly vectorizable loops with unsigned indices are not being vectorized by GCC, pointing to cost model issues.

Unsolicited advertisement for FESPA Global Print Expo attendee data.

Tue, 12 May 2026 00:00:00 GMT

Alicja Emil offers a list of attendees for the FESPA Global Print Expo 2026.

C++: Suppresses -Wzero-as-null-pointer-constant for spaceship operator.

Tue, 12 May 2026 00:00:00 GMT

Disables the `-Wzero-as-null-pointer-constant` warning when using the spaceship operator (`<=>`) in the standard way.

c++/reflection: overzealous complete_type in consteval_only_p [PR125280]

Tue, 12 May 2026 00:00:00 GMT

The commit fixes a bogus "has incomplete type" error in C++ reflection by removing an unnecessary `complete_type` call.

COBOL: Improves GENERIC for conditionals and comparisons

Tue, 12 May 2026 00:00:00 GMT

Improves execution speed of conditional logic and comparisons in COBOL programs.

Document GET_MODE_MASK limit using HOST_BITS_PER_WIDE_INT.

Tue, 12 May 2026 00:00:00 GMT

The documentation for GET_MODE_MASK is updated to reflect its actual behavior regarding mode sizes.

Documentation: Removes unused reference to @gol macro.

Tue, 12 May 2026 00:00:00 GMT

Removes a stale reference to the `@gol` macro in the GCC documentation build system.

Delay setting of slp_node->data improvements in vectorization.

Tue, 12 May 2026 00:00:00 GMT

This commit delays setting `slp_node->data` in vectorizable loads/stores to allow for late adjustments, improving vectorization decisions.

Avoid setting ls_type when unused

Tue, 12 May 2026 00:00:00 GMT

The compiler now avoids setting `ls_type` unnecessarily in vectorization, improving efficiency.

Make aarch64_output_simd_mov_imm_low return const char *

Tue, 12 May 2026 00:00:00 GMT

Changes the return type of aarch64_output_simd_mov_imm_low to const char * to avoid a -Werror=write-strings failure.

c: Avoid false positive for useless casts and generic [PR125261]

Tue, 12 May 2026 00:00:00 GMT

The compiler now avoids issuing false warnings for useless casts in C code, particularly with generic selections.

Simplify ((~x) & y) ^ (x | y) to x or ~x

Tue, 12 May 2026 00:00:00 GMT

GCC now simplifies certain bitwise operations involving XOR, AND, OR, and NOT into simpler forms, potentially improving code generation.

Allow Commutative Operand Swap for IFN in SLP Reduction

Tue, 12 May 2026 00:00:00 GMT

GCC can now swap commutative operands in SLP vectorization for internal functions (IFN) like `.COND_ADD`, improving vectorization of code generated by if-conve…

hppa64: Avoids incorrect linker selection on HPUX systems.

Tue, 12 May 2026 00:00:00 GMT

Prevents the HP linker from being inadvertently selected over GNU ld on HP-UX systems.

Allow Single-Lane SLP Fallback When Limit Is Exhausted

Tue, 12 May 2026 00:00:00 GMT

GCC now allows single-lane SLP vectorization to proceed even when the multi-lane SLP discovery limit is exhausted, fixing missed optimizations in loops with co…

libstdc++: Support ON-format DAY in Zone UNTIL field [PR124852]

Tue, 12 May 2026 00:00:00 GMT

The libstdc++ now correctly parses complex day specifications in timezone definitions, fixing misinterpretations of historical dates.

Fix -Wsign-compare warning in new test

Tue, 12 May 2026 00:00:00 GMT

This commit fixes a sign comparison warning in a new libstdc++ test case.

Add RISC-V test cases for scalar unsigned SAT form 9.

Tue, 12 May 2026 00:00:00 GMT

This commit adds test cases for scalar unsigned SAT form 9 in RISC-V to improve code reliability.

Add RISC-V test cases for scalar unsigned SAT form 10.

Tue, 12 May 2026 00:00:00 GMT

This commit adds new test cases for scalar unsigned SAT form 10 in the RISC-V architecture.

Add RISC-V test cases for scalar unsigned SAT form 8.

Tue, 12 May 2026 00:00:00 GMT

This commit adds new test cases for scalar unsigned SAT form 8 in the RISC-V architecture.

RX: Fix infinite-loop on LRA

Tue, 12 May 2026 00:00:00 GMT

The RX backend now avoids an infinite loop during LRA by correcting register class definitions and stack frame manipulation.

Scev: Sign extend step in peeled converted IV handling [PR 125291]

Tue, 12 May 2026 00:00:00 GMT

GCC's scalar evolution analysis now correctly handles peeled converted induction variables by sign-extending the step.

SRA: Fix build_user_friendly_ref_for_offset for bit-fields

Tue, 12 May 2026 00:00:00 GMT

The compiler now correctly handles bit-field propagation with Scalar Replacement of Aggregates (SRA), improving warning accuracy and fixing a verification issu…

Testsuite: Fix reflect/bases_of5.C for -m32

Tue, 12 May 2026 00:00:00 GMT

The test case reflect/bases_of5.C now compiles correctly in 32-bit mode by using `decltype (sizeof 0)` instead of `unsigned long`.

Testsuite: Include stddef.h for size_t in pr94994

Tue, 12 May 2026 00:00:00 GMT

Fixes a testcase that used size_t without including stddef.h.

Testsuite: RISC-V: Reset -march for tests with -mcpu

Tue, 12 May 2026 00:00:00 GMT

Resets the architecture flag (-march) in RISC-V tests when using -mcpu to ensure the architecture implied by -mcpu prevails.

Tree-optimization: Fold SAT_ADD at GIMPLE level

Tue, 12 May 2026 00:00:00 GMT

Extends scalar SAT_ADD constant folding to recognize cases where one operand is zero.

AArch64: Turn on GPR narrowing pass by default

Mon, 11 May 2026 00:00:00 GMT

The GPR narrowing pass is now enabled by default for all AArch64 targets, optimizing code by using smaller register sizes where possible.

C++: Correctly parses default arguments referring to parameters.

Mon, 11 May 2026 00:00:00 GMT

Fixes a bug where default arguments could not refer to earlier parameters in the function declaration.

C-family: Look through non-user-facing typedef

Mon, 11 May 2026 00:00:00 GMT

The compiler now correctly identifies user-facing types even when going through non-user-facing typedefs.

Combine pass rejects instructions with hard register constraints.

Mon, 11 May 2026 00:00:00 GMT

This commit prevents the combine pass from merging instructions that use hard register constraints, fixing code generation errors.

Combine pass checks for CLOBBER in `make_compound_operation_int`.

Mon, 11 May 2026 00:00:00 GMT

This commit prevents an ICE in the combine pass by checking for CLOBBER instructions before calling `simplify_subreg`.

Contrib: Fix check_GNU_style.py for some .opt issues [PR125275]

Mon, 11 May 2026 00:00:00 GMT

Updates check_GNU_style.py to ignore line length and spacing rules for .opt files.

Fixincludes: Correct Typographical Errors in Various Files

Mon, 11 May 2026 00:00:00 GMT

This commit rectifies typos across multiple fixincludes files, enhancing code readability and maintainability.

Fortran: Implement EX format specifier for WRITE

Mon, 11 May 2026 00:00:00 GMT

The Fortran compiler now supports the EX format specifier for WRITE statements, outputting floating-point numbers in hexadecimal format.

Simplify RTL bit-flipping operations to use XOR

Mon, 11 May 2026 00:00:00 GMT

The compiler can now simplify certain bit-flipping RTL patterns into XOR operations, improving code generation for RISC-V and potentially other architectures.

Update Email in MAINTAINERS

Mon, 11 May 2026 00:00:00 GMT

This commit updates the author's email address and adds them to the DCO section in the MAINTAINERS file.

AArch64: Use fmov for some low-lane FP SIMD constant vectors.

Mon, 11 May 2026 00:00:00 GMT

This commit extends AArch64's AdvSIMD constant materialization to use `fmov` for vectors with a single low-element FP constant, improving code generation.

Include: Fixed typos in multiple header files.

Mon, 11 May 2026 00:00:00 GMT

Typos in various header files were corrected to improve code readability.

HPPA64: Fix linking of libgcc on HP-UX with GNU ld

Mon, 11 May 2026 00:00:00 GMT

Enables correct linking of libgcc on HP-UX for the HPPA64 architecture when using GNU ld.

libstdc++: VxWorks: Enable clock_gettime

Mon, 11 May 2026 00:00:00 GMT

libstdc++ now uses `clock_gettime` on VxWorks, enabling more precise time measurements with `chrono`.

LM32: Enable LRA after testing showed minimal regressions

Mon, 11 May 2026 00:00:00 GMT

The LM32 architecture now enables live range splitting after testing showed few regressions.

match.pd: Rearrange (VCE (BFR)) simplification conditions

Mon, 11 May 2026 00:00:00 GMT

The compiler now correctly handles view conversions from bit-fields to integer types by adding a type precision check in match.pd.

Toplevel: Fix typos in build files

Mon, 11 May 2026 00:00:00 GMT

This commit fixes typos in the toplevel build files.

Loop idiom recognition avoids speculating no-op load/store.

Mon, 11 May 2026 00:00:00 GMT

GCC's loop idiom recognition avoids speculating load/store pairs for modes that cannot transfer bits, preventing undefined behavior.

VxWorks: Support aarch64 errata

Mon, 11 May 2026 00:00:00 GMT

AArch64 errata are now supported on VxWorks, and related test skips have been reverted.

ada: Remove forced inlining of generics for configurable run times

Mon, 11 May 2026 00:00:00 GMT

ada: Remove forced inlining of generics for configurable run times

Industry environment analysis report for the Inkjet Printer Head sector

Sun, 10 May 2026 00:00:00 GMT

Michelle offers an industry analysis report for the Inkjet Printer Head sector.

Gcc-17-20260510 is now available

Sun, 10 May 2026 00:00:00 GMT

GCC 17 snapshot gcc-17-20260510 is now available for download.

a68: Removes unimplemented math functions from is_mappable_routine.

Sun, 10 May 2026 00:00:00 GMT

The Algol68 compiler now excludes unimplemented math functions from the list of mappable routines.

Ada: Fixes Image attribute for derived enumeration types.

Sun, 10 May 2026 00:00:00 GMT

The Ada compiler now correctly handles the Image attribute for derived enumeration types with representation clauses.

Ada: Sets LDFLAGS to configure setting in gnattools.

Sun, 10 May 2026 00:00:00 GMT

The Ada build system now aligns LDFLAGS settings in gnattools with configure settings.

Gcov now reads the correct arc flag in JSON output.

Sun, 10 May 2026 00:00:00 GMT

Gcov now correctly identifies true arcs in JSON output.

x86-64: Use R11 for DRAP register in preserve_none functions

Sun, 10 May 2026 00:00:00 GMT

The compiler now uses R11 for the DRAP register in preserve_none functions on x86-64, improving stack alignment.

Xtensa: Assert the results of several validate_change() calls

Sun, 10 May 2026 00:00:00 GMT

The Xtensa backend now validates the results of RTX changes, triggering an ICE if a change fails.

Xtensa: Revise xtensa_expand_prologue()

Sun, 10 May 2026 00:00:00 GMT

This commit refactors ``xtensa_expand_prologue()`` to use C++ references instead of pointers for return values.

gcc-16-20260509 is now available

Sat, 09 May 2026 00:00:00 GMT

gcc-16-20260509 is now available

NDT Ultrasonic Transducer

Sat, 09 May 2026 00:00:00 GMT

NDT Ultrasonic Transducer

Spoofing Rust's `Self` type in C++26

Sat, 09 May 2026 00:00:00 GMT

Spoofing Rust's `Self` type in C++26

C++: Always Walk DECL_VALUE_EXPR in cp_genericize_r

Sat, 09 May 2026 00:00:00 GMT

cp_genericize_r now always walks DECL_VALUE_EXPR, fixing a potential issue during template instantiation.

C++/reflection: Add null_reflection_p

Sat, 09 May 2026 00:00:00 GMT

Introduces a null_reflection_p function to check for null reflection objects, improving code readability.

cfghooks: Move IR Type Inside cfghooks Structure

Sat, 09 May 2026 00:00:00 GMT

The IR type is now part of the `cfg_hooks` structure, which helps with future constification efforts.

cfghooks: Remove Name Field from cfg_hooks Structure

Sat, 09 May 2026 00:00:00 GMT

The `name` field has been removed from the `cfg_hooks` structure, as it's no longer needed with the introduction of the IR field.

cfghooks: Make cfg_hooks const to Prevent Runtime Modification

Sat, 09 May 2026 00:00:00 GMT

The cfg_hooks struct is now const to prevent accidental runtime modification, improving code safety.

fortran: Add -fcoarray=shared option to auto-link -lcaf_shmem

Sat, 09 May 2026 00:00:00 GMT

fortran: Add -fcoarray=shared option to auto-link -lcaf_shmem

RISC-V: No Longer Emit cm.popret When zcmp + zicfiss Is Enabled

Sat, 09 May 2026 00:00:00 GMT

GCC now uses cm.pop + sspopchk + a regular return instead of cm.popret when both zcmp and zicfiss are enabled, for better shadow stack management.

x86_cse: Add a Test for PR target/125245

Sat, 09 May 2026 00:00:00 GMT

A new test case is added to verify the fix for PR target/125245, which involves checking CONST0_RTX and CONSTM1_RTX in the x86 common subexpression elimination…

x86: Converts vector load to constant integer load.

Sat, 09 May 2026 00:00:00 GMT

The x86 compiler now converts vector loads to constant integer loads for better optimization.

ada: Lift restriction on Valid_Scalars attribute for private tagged types

Sat, 09 May 2026 00:00:00 GMT

ada: Lift restriction on Valid_Scalars attribute for private tagged types

Cleans up visibility checks in `Is_Visible_Component`

Sat, 09 May 2026 00:00:00 GMT

This commit refactors the `Is_Visible_Component` function in the Ada front end for improved clarity and maintainability, without altering its functional behavi…

Gcc-15-20260508 is now available

Fri, 08 May 2026 00:00:00 GMT

GCC 15 snapshot gcc-15-20260508 is available for testing.

Gcc16 or 17: when is the pointed type relevant for emitted assembler code?

Fri, 08 May 2026 00:00:00 GMT

Basile asks if using `void*` and explicit casts affects assembly code generation in GCC, sparking a discussion on type-based alias analysis.

Uncounted loop vectorization example doesn't work with unsigned index

Fri, 08 May 2026 00:00:00 GMT

The uncounted loop vectorization in GCC 16 doesn't work with unsigned loop indexes in the example.

AArch64 vectorization costs adjusted for scalar-to-vector conversion.

Fri, 08 May 2026 00:00:00 GMT

This change improves AArch64 code generation by more accurately costing scalar-to-vector conversions during vectorization, preventing inefficient code.

Fortran: Allows access to coarray elements within modules.

Fri, 08 May 2026 00:00:00 GMT

The Fortran compiler now correctly handles access to coarray elements within modules.

RISC-V: Utilize slliw instruction for left shifted signed bitfield extractions.

Fri, 08 May 2026 00:00:00 GMT

RISC-V code generation now uses `slliw` instruction to optimize left-shifted signed bitfield extractions, improving performance in specific scenarios.

Restore bootstrap on aarch64

Fri, 08 May 2026 00:00:00 GMT

Restore bootstrap on aarch64

Simplify-rtx: Handle (X & C) | ((X^Y) & ~C) -> X ^ (Y & ~C) transformation.

Fri, 08 May 2026 00:00:00 GMT

Extends simplify-rtx to handle the expression `(X & C) | ((X^Y) & ~C)` and simplify it to `X ^ (Y & ~C)`, resulting in optimized code.

Fixed passing padded constant structs in registers on big-endian targets.

Fri, 08 May 2026 00:00:00 GMT

Corrects how GCC places padding bytes within constant structs passed in registers on big-endian architectures, resolving a code generation bug.

Match: Corrected merged patterns for a!=b implying a and b are not zero.

Fri, 08 May 2026 00:00:00 GMT

Fixes a bug in pattern matching that caused incorrect boolean results when comparing variables against zero.

Libfortran: Fixed static analyzer warning in free_format_data.

Fri, 08 May 2026 00:00:00 GMT

Addresses a cppcheck warning by changing the argument to free_format_data to pass a pointer to a pointer.

libstdc++: Replace assert with __glibcxx_assert to reduce overhead.

Fri, 08 May 2026 00:00:00 GMT

Replaces `assert` with `__glibcxx_assert` in libstdc++ to reduce runtime overhead in release builds.

Match: Move saturation alu patterns into match-sat-alu.pd [NFC]

Fri, 08 May 2026 00:00:00 GMT

Saturation arithmetic patterns in match.pd are moved to a new file, ``match-sat-alu.pd``, for better organization.

Match.pd: Added pattern to simplify nested boolean comparisons.

Fri, 08 May 2026 00:00:00 GMT

A new pattern in match.pd simplifies `(bool >= A) >= A` expressions to `bool >= A`.

MinGW: Quote symbols in Intel syntax to avoid misinterpretation.

Fri, 08 May 2026 00:00:00 GMT

This commit ensures that symbols are properly quoted in Intel syntax when using the MinGW compiler, resolving errors where symbols were misinterpreted as opera…

RISC-V: Remove interleaved vector synthesis optimization [PR125215]

Fri, 08 May 2026 00:00:00 GMT

The "hi/lo" optimization path for interleaved stepped constant vector synthesis in RISC-V has been removed due to performance concerns.

rs6000: Emit insn with proper rounding mode for nearbyint

Fri, 08 May 2026 00:00:00 GMT

rs6000: Emit insn with proper rounding mode for nearbyint

x86_cse: Check CONST0_RTX and CONSTM1_RTX During Vectorization

Fri, 08 May 2026 00:00:00 GMT

The x86 CSE pass now correctly handles CONST0_RTX and CONSTM1_RTX for constant vectors during vectorization, improving code generation.

Xtensa: Define HONOR_REG_ALLOC_ORDER as 1

Fri, 08 May 2026 00:00:00 GMT

This commit disables incorrect register save cost estimation in function prologues/epilogues for Xtensa, potentially reducing stack frame usage.

Testsuite: Fix test requirements for diagnostic-test-paths-4.py

Fri, 08 May 2026 00:00:00 GMT

The testsuite now correctly checks diagnostic paths in the presence of compiler plugins.

ada: Fix file access time information in __gnat_copy_attribs

Fri, 08 May 2026 00:00:00 GMT

ada: Fix file access time information in __gnat_copy_attribs

Gcc-14-20260507 is now available

Thu, 07 May 2026 00:00:00 GMT

GCC 14 snapshot gcc-14-20260507 is available for download.

Gccjit dynamic down casting (GCC16 or future GCC17)

Thu, 07 May 2026 00:00:00 GMT

Basile Starynkevitch asks about dynamic downcasting capabilities in GCCJIT to determine the type of a `gcc_jit_object` pointer.

Gnu Tools Cauldron 2026

Thu, 07 May 2026 00:00:00 GMT

The GNU Tools Cauldron 2026 will be held in Prague from October 2nd to 4th, with a Toolchains Track at the Linux Plumbers Conference.

Transitioning libgomp from C to C++ implementation

Thu, 07 May 2026 00:00:00 GMT

Thomas Schwinge proposes transitioning libgomp from C to C++ to improve type safety and enable better OpenMP OMPT implementation.

alloc-pool: Allow non-default constructors.

Thu, 07 May 2026 00:00:00 GMT

The object_allocator now supports allocating objects using non-default constructors.

c++: refine decl_defined_p

Thu, 07 May 2026 00:00:00 GMT

c++: refine decl_defined_p

C++ Reflection Fixes Sharing of Type Information for Anonymous Unions

Thu, 07 May 2026 00:00:00 GMT

GCC now handles reflection on anonymous unions/structs correctly by differentiating between `CLASSTYPE_TYPEINFO_VAR` and `ANON_AGGR_TYPE_FIELD`. This prevents…

C++: Fixed internal compiler error with invalid template argument.

Thu, 07 May 2026 00:00:00 GMT

Addresses an ICE caused by temporary objects in template argument deduction by skipping a problematic check for ignored declarations.

Constant Evaluation Handles Pointer Conversions in Object Size Builtins

Thu, 07 May 2026 00:00:00 GMT

GCC now performs constant evaluation of the `__builtin_object_size` and `__builtin_dynamic_object_size` builtins, handling pointer conversions for more accurat…

C++: Ignore consteval-only uses inside USING_STMT.

Thu, 07 May 2026 00:00:00 GMT

Prevents USING_STMT operands from being considered as consteval-only uses in the C++ compiler.

C++ Reflection: Fixes Exception Handling in `extract_ref`

Thu, 07 May 2026 00:00:00 GMT

GCC now correctly throws exceptions in `extract_ref` when reflection encounters invalid array types, preventing internal compiler errors.

C++: Improve printing of REFLECT_EXPR in diagnostics.

Thu, 07 May 2026 00:00:00 GMT

Enhances REFLECT_EXPR printing in diagnostics to use C++ syntax where possible, improving readability.

c++/reflection: Fix ICE with bases_of.

Thu, 07 May 2026 00:00:00 GMT

The compiler no longer crashes when using bases_of on a TREE_BINFO in reflection.

C++/reflection: Fixes for comparing reflections [PR125208]

Thu, 07 May 2026 00:00:00 GMT

Fixes bugs in comparing C++ reflections, including a crash and incorrect alias comparison.

combine: Improve PLUS/MINUS cases in make_compound_operation.

Thu, 07 May 2026 00:00:00 GMT

The combine pass now uses simplify_gen_binary for PLUS/MINUS in make_compound_operation to improve simplification and operand ordering.

Fortran: Generate array bounds checks in the scalarizer block.

Thu, 07 May 2026 00:00:00 GMT

Moves array bounds checking code to the scalarizer block in gfc_conv_expr_descriptor to avoid use-before-definition issues.

Fortran: Fixed automatic deallocation with derived type IO.

Thu, 07 May 2026 00:00:00 GMT

Corrects an issue in Fortran derived type IO that prevented automatic deallocation of local variables by adjusting the function specification.

Fortran: Pass only the block for bounds check generation.

Thu, 07 May 2026 00:00:00 GMT

Refactors the array bounds check generation to pass only the code block, simplifying the function signature.

Fortran Fixes Complex Associate-Name with Inferred Kind

Thu, 07 May 2026 00:00:00 GMT

GCC now correctly handles complex associate-names with inferred kinds in Fortran, resolving a type mismatch error.

Add post_ra_split_completed to allow later condition-code clobbers.

Thu, 07 May 2026 00:00:00 GMT

Allows targets to introduce new condition-code register clobbers after the first post-RA split, converting the RX port to this form.

Improve code for (1 << N) & 0x1 on RISC-V.

Thu, 07 May 2026 00:00:00 GMT

A RISC-V-specific code splitter improves the generated assembly for the expression (1 << N) & 0x1.

Improve RTL expansion of doubleword multiplications.

Thu, 07 May 2026 00:00:00 GMT

Improves RTL expansion of doubleword multiplications by handling shifts greater than BITS_PER_WORD and preventing generation of unnecessary multiplications.

Match: Fold min/max patterns for integral types only.

Thu, 07 May 2026 00:00:00 GMT

match.pd: fold (X - (X<0)) ^ -(X<0) into ABS_EXPR.

Thu, 07 May 2026 00:00:00 GMT

A new match.pd pattern folds (X - (X<0)) ^ -(X<0) into ABS_EXPR.

rtlanal: Refine operator precedence for comparisons.

Thu, 07 May 2026 00:00:00 GMT

Operator precedence in rtlanal is tweaked to ensure all binary operators have higher precedence than unary operators.

Testsuite: Correctly initialize struct in divide-by-zero test.

Thu, 07 May 2026 00:00:00 GMT

Fixes the gcc.dg/analyzer/divide-by-zero-6.c test by ensuring the struct is fully initialized on all architectures.

Adds preliminary support for new SPARK attribute `At`

Thu, 07 May 2026 00:00:00 GMT

GCC's Ada compiler now includes basic parsing and legality checks for the new SPARK attribute `At`, laying groundwork for formal verification.

Corrects context checks for the Initialized attribute

Thu, 07 May 2026 00:00:00 GMT

This commit fixes an issue where the Ada `Initialized` attribute was incorrectly checked in ghost code contexts, preventing compile-time errors.

Optimizes memory layout for Ada tagged type data

Thu, 07 May 2026 00:00:00 GMT

This commit improves the memory layout of type-specific data records for Ada tagged types, reducing memory consumption on 64-bit targets.

Gcc-13-20260506 Is Now Available

Wed, 06 May 2026 00:00:00 GMT

GCC 13 snapshot gcc-13-20260506 is available for testing.

analyzer: Show value ranges in svalue::dump

Wed, 06 May 2026 00:00:00 GMT

The static analyzer now displays value range information when dumping svalue nodes, aiding debugging.

Analyzer: Add data flow events

Wed, 06 May 2026 00:00:00 GMT

The analyzer now provides more detailed data flow events to help users understand warnings related to problematic values.

AArch64: Move pass_narrow_gp_writes before pass_free_cfg to fix DF state.

Wed, 06 May 2026 00:00:00 GMT

The narrow_gp_writes pass now runs before pass_free_cfg in GCC for AArch64, preventing stale dataflow (DF) state issues.

Analyzer: generating raw state for rewinding data flow

Wed, 06 May 2026 00:00:00 GMT

The analyzer now retains raw state when rewinding data flow, improving diagnostic accuracy without disabling state purging.

Rewrite and memoize consteval_only_p for C++ reflection.

Wed, 06 May 2026 00:00:00 GMT

Speeds up compile times with C++ reflection by rewriting and memoizing the consteval_only_p predicate.

Fortran Adds Debug Functions for OpenMP Data Structures

Wed, 06 May 2026 00:00:00 GMT

The Fortran compiler now includes debug functions for OpenMP data structures, enabling easier inspection during debugging.

Add vector_costs::add_slp_cost grouping hook.

Wed, 06 May 2026 00:00:00 GMT

GCC introduces a hook for targets to correlate cost events from SLP operations, simplifying cost analysis for vectorization.

Adjust OpenMP SIMD call cost model.

Wed, 06 May 2026 00:00:00 GMT

This commit adjusts the cost of OpenMP SIMD calls in the GCC cost model, which can influence optimization decisions.

value-range.h: Fix typo in comment

Wed, 06 May 2026 00:00:00 GMT

A stray slash is removed from a comment in `value-range.h`.

i386: Keep SEH enabled for Win64 sysv_abi functions

Wed, 06 May 2026 00:00:00 GMT

SEH is now kept enabled for Win64 functions compiled with SysV ABI, ensuring consistent exception handling.

libstdc++: Reduce instantiations in `__formatter_str::_M_format_range`.

Wed, 06 May 2026 00:00:00 GMT

This commit reorders compile-time checks in `__formatter_str::_M_format_range` to reduce unnecessary template instantiations, potentially improving compile tim…

range-ops: Use const/static where possible

Wed, 06 May 2026 00:00:00 GMT

This commit improves code clarity and reduces potential errors by adding `const` and `static` keywords to range-ops functions and variables.

Match: Simplify max/min of ANDed variables.

Wed, 06 May 2026 00:00:00 GMT

New match.pd patterns optimize min/max operations on variables ANDed with constants.

RISC-V: Scale vector operation costs by LMUL for latency and register pressure.

Wed, 06 May 2026 00:00:00 GMT

The RISC-V backend now accounts for the increased cost of larger LMULs in vector operations, which should improve code generation.

tree-optimization/125174 - cost OMP SIMD calls

Wed, 06 May 2026 00:00:00 GMT

tree-optimization/125174 - cost OMP SIMD calls

Ada removes conversion of ignored pragmas to if-statements

Wed, 06 May 2026 00:00:00 GMT

The Ada front end no longer transforms ignored pragmas into if-statements, simplifying their handling.

Resolves incorrect validity check for array components

Wed, 06 May 2026 00:00:00 GMT

This commit fixes a bug where the compiler incorrectly reported validity check failures for floating-point components within arrays having reverse storage orde…

Fixes `Valid_Scalars` attribute for private tagged types

Wed, 06 May 2026 00:00:00 GMT

This commit resolves an issue where the Ada `Valid_Scalars` attribute failed to work correctly with certain private tagged types.

Justificante pago 05-05-2026

Tue, 05 May 2026 00:00:00 GMT

Email with a payment confirmation attached.

Lto: How to handle static variables in LTO compilations?

Tue, 05 May 2026 00:00:00 GMT

The avr backend uses a static variable set in TARGET_INSERT_ATTRIBUTES and used in TARGET_ASM_FILE_END, but this doesn't work in LTO compilations. The author…

New GCC Mirror in Iran

Tue, 05 May 2026 00:00:00 GMT

A new GCC mirror in Iran may face legal obstacles due to U.S. export regulations.

analyzer: Remove unused variable to resolve compiler warning.

Tue, 05 May 2026 00:00:00 GMT

Removes an unused variable in the analyzer to fix a compiler warning.

c++/modules: Fixes false ABI tag mismatch with modules.

Tue, 05 May 2026 00:00:00 GMT

Resolves a false positive ABI tag mismatch in C++ modules by ignoring inherited tags during comparison when mangling status differs.

Fortran: Fix namelist read for input with comments

Tue, 05 May 2026 00:00:00 GMT

The Fortran compiler now correctly parses namelist input containing comments.

Fixes ICE in D compiler due to forward reference of nested struct.

Tue, 05 May 2026 00:00:00 GMT

Avoids an internal compiler error in the D compiler when a forward reference changes the type mode of an enclosing struct.

Update gcc de.po.

Tue, 05 May 2026 00:00:00 GMT

Updates the German translation file for GCC.

C++ modules: Handle ENOTSUP from posix_fallocate.

Tue, 05 May 2026 00:00:00 GMT

Fixes a failure when building GCC on FreeBSD with ZFS due to posix_fallocate returning ENOTSUP when creating module cache files.

Improve documentation and example for building Modula-2 shared libraries.

Tue, 05 May 2026 00:00:00 GMT

The documentation and example code for building shared libraries with Modula-2 have been updated and improved, including a new test case.

Adjust expected output after recent jump threader change.

Tue, 05 May 2026 00:00:00 GMT

Updates a test case for RISC-V vector extensions to match the new output after a jump threader change.

i386: Don't split volatile memory tests into 8-bit tests.

Tue, 05 May 2026 00:00:00 GMT

Avoids undesirable splitting of 16/32-bit volatile memory tests into 8-bit tests when `-ffuse-ops-with-volatile-access` is enabled.

libga68: Remove redundant attribute visibility check macro.

Tue, 05 May 2026 00:00:00 GMT

The libga68 library now uses the shared GCC macro for checking attribute visibility.

libssp: Change __stack_chk_guard to uintptr_t.

Tue, 05 May 2026 00:00:00 GMT

Modifies libssp to declare __stack_chk_guard as uintptr_t to match its internal declaration in GCC.

libstdc++: Remove non-concepts fallback for make_shared_for_overwrite

Tue, 05 May 2026 00:00:00 GMT

The libstdc++ now requires compilers to support C++20 concepts for `std::make_shared_for_overwrite`.

Fixes experimental::__is_x86_pd() in libstdc++.

Tue, 05 May 2026 00:00:00 GMT

Corrects macro names and refactors experimental x86 SIMD detection in libstdc++.

Libstdc++: Replace uses of EBO with [[no_unique_address]]

Tue, 05 May 2026 00:00:00 GMT

The libstdc++ now uses the `[[no_unique_address]]` attribute instead of empty base optimization (EBO) to reduce the size of class layouts.

Libstdc++: Simplify std::shared_ptr internals

Tue, 05 May 2026 00:00:00 GMT

The `_Impl` classes inside `_Sp_counted_deleter` and `_Sp_counted_ptr_inplace` are removed, simplifying the internal layout of `std::shared_ptr`.

libstdc++: Improve docs for range access functions [PR97001]

Tue, 05 May 2026 00:00:00 GMT

The libstdc++ now includes improved documentation for range access functions in `range_access.h`.

libstdc++: Update Doxygen link to 'topics.html' from 'modules.html'.

Tue, 05 May 2026 00:00:00 GMT

Updates an internal link in libstdc++ documentation to point to the correct Doxygen-generated page.

RISC-V: Add test for vec_duplicate and vmsgt.vv combine

Tue, 05 May 2026 00:00:00 GMT

This commit adds a new test case to verify the combining of vec_duplicate and vmsgt.vv instructions into vmsgt.vx on RISC-V.

RISC-V: Combine vec_duplicate + vmsgt.vv to vmsgt.vx

Tue, 05 May 2026 00:00:00 GMT

The compiler now combines `vec_duplicate` with `vmsgt.vv` into `vmsgt.vx` on RISC-V when the cost of GR2VR is zero.

testsuite: Refine requirements for pr122569*.c tests.

Tue, 05 May 2026 00:00:00 GMT

Updates testsuite to require ctzll/clzll targets and lp64/llp64 for pr122569 tests.

Fix ICE when associating DOT_PROD_EXPR in SLP vectorization.

Tue, 05 May 2026 00:00:00 GMT

Prevents an internal compiler error (ICE) during SLP vectorization when handling DOT_PROD_EXPR by avoiding non-binary associatable statements.

ada: Update the documentation of Iterable in the GNAT RM

Tue, 05 May 2026 00:00:00 GMT

ada: Update the documentation of Iterable in the GNAT RM

GCC 14.3.1 Status Report (2026-05-04)

Mon, 04 May 2026 00:00:00 GMT

GCC 14.4 release candidate is planned for June 19th, with the release a week after; developers are asked to review and backport regression fixes.

GCC 15.2.1 Status Report (2026-05-04)

Mon, 04 May 2026 00:00:00 GMT

GCC 15.3 release candidate is planned for June 5th, with the release the following week; developers should review and backport regression fixes.

New GCC Mirror in Iran

Mon, 04 May 2026 00:00:00 GMT

A new public mirror for GCC is proposed to be hosted in Iran.

RFC: Standalone AutoFDO Profile Tool for GCC

Mon, 04 May 2026 00:00:00 GMT

An RFC proposes a standalone AutoFDO profile tool for GCC, aiming for simplicity and minimal dependencies, sparking discussion on dependency choices.

AArch64: Fix SVE vec_perm for VL2048 VNx16QI.

Mon, 04 May 2026 00:00:00 GMT

Fixes an issue with SVE vector permutations for VL2048 that could lead to incorrect results due to truncation.

C++/Reflection: Fix ICE on is_accessible [PR124241].

Mon, 04 May 2026 00:00:00 GMT

Fixes an internal compiler error (ICE) when using `is_accessible` with anonymous unions by adding a missing check.

Simplify ``x + y == y`` into ``x == 0``

Mon, 04 May 2026 00:00:00 GMT

GCC now simplifies ``x + y == y`` into ``x == 0``, potentially improving code generation on RISC-V.

x86: Improve code generation by relaxing predicates in BT splitters.

Mon, 04 May 2026 00:00:00 GMT

The x86 backend now allows wider forms of operands for the BT (bit test) instruction, improving code generation and enabling better instruction propagation.

MAINTAINERS: Add Myself to Write After Approval

Mon, 04 May 2026 00:00:00 GMT

The GCC MAINTAINERS file was updated to grant write-after-approval privileges to Vijay Shankar.

Fold_stmt releases SSA names on simplification failure.

Mon, 04 May 2026 00:00:00 GMT

The fold_stmt function now releases SSA names when match-and-simplify fails, preventing memory leaks.

Libbacktrace Now Supports Multiple Zstd Frames

Mon, 04 May 2026 00:00:00 GMT

Libbacktrace can now decompress multi-frame zstd compressed data, improving its ability to handle complex backtraces.

Preserve edge flags in cleanup_control_expr_graph.

Mon, 04 May 2026 00:00:00 GMT

The cleanup_control_expr_graph function now preserves edge flags like EDGE_IRREDUCIBLE_LOOP, instead of clearing them unintentionally.

RS6000: Added -mcpu=future and built-in gating infrastructure.

Mon, 04 May 2026 00:00:00 GMT

The RS6000 architecture now supports the `-mcpu=future` option for enabling experimental processor features, along with gating infrastructure for built-in func…

Added testcase for tree-optimization/125153.

Mon, 04 May 2026 00:00:00 GMT

Added a new testcase (gcc.dg/torture/pr125153.c) for PR tree-optimization/125153 to verify the fix from a reverted commit.

Tree-optimization/125124: Disable sanity checking of BB SLP partitioning

Mon, 04 May 2026 00:00:00 GMT

Disables a sanity check that verifies the correctness of basic block SLP partitioning, likely due to a bug in the check itself.

xtensa: Improve address legitimation for wider memory accesses.

Mon, 04 May 2026 00:00:00 GMT

Improves code generation for Xtensa by allowing larger displacements for memory accesses wider than 1 byte.

ada: Fix ICE on static predicate when all case alternatives are False

Mon, 04 May 2026 00:00:00 GMT

ada: Fix ICE on static predicate when all case alternatives are False

testsuite: Make function body scans more flexible to ABI and asm syntax.

Mon, 04 May 2026 00:00:00 GMT

testsuite: Make function body scans more flexible to ABI and asm syntax.

Gcc-17-20260503 is now available

Sun, 03 May 2026 00:00:00 GMT

A GCC 17 snapshot is available for download.

Ada: Fix Build Failure on 32-bit FreeBSD

Sun, 03 May 2026 00:00:00 GMT

A build failure in the Ada runtime library on 32-bit FreeBSD systems has been resolved by adjusting a FreeBSD-specific subunit.

RISC-V: Correct conditional move expansion after operand canonicalization.

Sun, 03 May 2026 00:00:00 GMT

The RISC-V port now correctly handles changes to operand modes during conditional move expansion, fixing a bug introduced by recent improvements.

Testsuite: Skip x86 function-body scan tests on Darwin.

Sun, 03 May 2026 00:00:00 GMT

The testsuite now skips certain x86 function-body scan tests on Darwin because 64-bit Darwin doesn't support non-PIC code.

RISC-V: Improve Code Generation for Select Between 2^n and 0

Sun, 03 May 2026 00:00:00 GMT

GCC now generates more efficient RISC-V code for selecting between a power of 2 and zero, potentially saving bytes and improving performance.

ginclude: Avoid Redefining __STDC_VERSION_LIMITS_H__

Sun, 03 May 2026 00:00:00 GMT

The compiler now avoids redefining the `__STDC_VERSION_LIMITS_H__` macro, preventing warnings when including system headers.

or1k: Allow SImode for the condition flag register.

Sun, 03 May 2026 00:00:00 GMT

Fixes internal compiler errors on or1k by allowing SImode for the condition flag register.

Gcc-16-20260502 is now available.

Sat, 02 May 2026 00:00:00 GMT

GCC 16 snapshot gcc-16-20260502 is available for download.

Document Several ``force_l32`` Features for Xtensa

Sat, 02 May 2026 00:00:00 GMT

The Xtensa target now has documentation for the ``force_l32`` named address space, attribute, and command-line option.

Fortran/OpenMP: Simplify `gfc_free_omp_namelist` interface.

Sat, 02 May 2026 00:00:00 GMT

The `gfc_free_omp_namelist` function in the Fortran front end now uses an enum to specify what needs to be freed, simplifying its interface and improving code…

RISC-V: Optimize shift+rotate sequences to simple shift instructions.

Sat, 02 May 2026 00:00:00 GMT

The RISC-V backend now optimizes specific shift and rotate sequences into a single shift instruction, improving code generation for bit manipulation.

Minor testsuite tweaks

Sat, 02 May 2026 00:00:00 GMT

This commit removes an unnecessary optimization flag and renames some test files in the GCC testsuite.

LoongArch: Add spaceship expanders.

Sat, 02 May 2026 00:00:00 GMT

GCC now supports the spaceship operator for LoongArch, enabling better code generation for nested ternary operations.

Optimize ``A > B ? ABS(A) : B`` to ``MAX(A, B)`` When B >= 0

Sat, 02 May 2026 00:00:00 GMT

GCC now optimizes ``A > B ? ABS(A) : B`` to ``MAX(A, B)`` when it knows ``B`` is non-negative, enabling more efficient code generation.

RISC-V: Update riscv.opt.urls for -mmpy-option

Sat, 02 May 2026 00:00:00 GMT

Updates riscv.opt.urls to include the -mmpy-option, which was missing documentation.

Testsuite: Reorder clock::now calls in semaphore test

Sat, 02 May 2026 00:00:00 GMT

Reorders clock::now calls in a semaphore test to avoid false positives on VxWorks due to slow clock calls.

X86: Avoid AVX-512 instruction generation on non-AVX512 CPUs.

Sat, 02 May 2026 00:00:00 GMT

Fixes a SIGILL error that occurred when AVX512 instructions were generated on CPUs lacking AVX512 support by adding a runtime CPU feature check.

Implement ``__force_l32`` Named Address Space

Sat, 02 May 2026 00:00:00 GMT

The Xtensa backend gained a ``__force_l32`` named address space to handle sub-word loads from instruction memory.

Implement ``-mforce-l32`` Target-Specific Option

Sat, 02 May 2026 00:00:00 GMT

The Xtensa backend gained a ``-mforce-l32`` option to allow sub-word reads from instruction memory even in generic address spaces or without the ``force_l32``…

Fix internal error on private tagged types in instance with -gnateV.

Sat, 02 May 2026 00:00:00 GMT

An internal compiler error with private tagged types and `-gnateV` in Ada generics is resolved.

Dos and don'ts while removing multilib

Fri, 01 May 2026 00:00:00 GMT

An RFC discusses how to properly remove multilib support for s390 after dropping 31-bit support, while maintaining library directory conventions.

Gcc-15-20260501 is now available

Fri, 01 May 2026 00:00:00 GMT

GCC 15 snapshot is available for download.

Link with PIC Static Ada Runtime When -pie Is Specified

Fri, 01 May 2026 00:00:00 GMT

The Ada compiler now correctly links with the position-independent code (PIC) static runtime when the `-pie` flag is used for building executables.

Algol68: Correct typo exeect -> exeext

Fri, 01 May 2026 00:00:00 GMT

This commit fixes a typo in the Algol68 compiler's build system, that prevented compilation on Windows.

Build: Set default CPP_FOR_BUILD in all cases.

Fri, 01 May 2026 00:00:00 GMT

Ensure CPP_FOR_BUILD is always defaulted, which is important for build systems using autoconf.

Build: Preserve *_FOR_BUILD environment variables.

Fri, 01 May 2026 00:00:00 GMT

The build process now consistently preserves *_FOR_BUILD environment variables, enabling custom build tool configurations.

Build: Check solaris_{as,ld} where appropriate.

Fri, 01 May 2026 00:00:00 GMT

The build system now directly checks for Solaris assembler and linker, improving clarity and simplification.

C++/modules: Handle noexcept and deduced auto when merging functions.

Fri, 01 May 2026 00:00:00 GMT

Fixes a return type issue when merging functions with instantiated noexcept specifiers and deduced return types in C++ modules.

Improve RISC-V Constant Synthesis for Some HImode Constants

Fri, 01 May 2026 00:00:00 GMT

The RISC-V backend now synthesizes HImode constants more efficiently, using `addi` instead of `li+xori` sequences in some cases, and allows CSE to derive const…

Update gcc .po files

Fri, 01 May 2026 00:00:00 GMT

Synchronise the GCC message translations.

Correct Example Code Comment in GCC Documentation

Fri, 01 May 2026 00:00:00 GMT

Fixed a typo in a comment within the example code for the -Wunused-variable flag in the GCC documentation.

Fix typo in gcov-tool Makefile

Fri, 01 May 2026 00:00:00 GMT

Corrects a typo in the gcov-tool Makefile that prevented the correct removal of executable extensions.

Improve RISC-V code generation for xor+xor+ior sequences

Fri, 01 May 2026 00:00:00 GMT

Improves RISC-V code generation by transforming `xor+xor+ior` sequences into more efficient `andn+xor` instructions.

Match: Only enable `(A>>bool) EQ 0 -> (unsigned)A LE bool` for non-vector types.

Fri, 01 May 2026 00:00:00 GMT

The `(A>>bool) EQ 0 -> (unsigned)A <= bool` optimization pattern now only applies to non-vector integral types.

Match.pd: Add pattern for `(A>>bool) == 0 -> (unsigned)A <= bool`.

Fri, 01 May 2026 00:00:00 GMT

The compiler can now transform `(A>>bool) == 0` into `(unsigned)A <= bool`, potentially improving performance.

Match.pd: Implement `(A>>C) != (B>>C) -> (A^B) >= (1<
Fri, 01 May 2026 00:00:00 GMT
The compiler now optimizes `(A>>C) != (B>>C)` into `(A^B) >= (1<

Match.pd: Make `if (c) a |= CST1 else a &= ~CST1` unconditional.

Fri, 01 May 2026 00:00:00 GMT
The compiler transforms conditional bit setting/clearing into an unconditional form, potentially improving performance.

Add HF vector mode support to s390 secondary reload

Fri, 01 May 2026 00:00:00 GMT
This commit adds support for handling HF vector modes in the s390 backend's secondary reload mechanism.

Remove redundant condition in tree-vect-loop.cc

Fri, 01 May 2026 00:00:00 GMT
This removes a pointless `&& 1` condition in the `vectorizable_reduction` function, cleaning up the code.

Corrected condition for last_4x_vec_label in ix86_expand_movmem

Fri, 01 May 2026 00:00:00 GMT
Fixes a condition that prevented the generation of a label for certain memory move sizes, affecting inlined memmove performance.

i386: Reduce build time by improving division modeling.

Fri, 01 May 2026 00:00:00 GMT
Reduces GCC build time by optimizing the modeling of division operations in the i386 backend.

i386: Disable PIE for tests using check_function_bodies due to PIE incompatibilities.

Fri, 01 May 2026 00:00:00 GMT
Several i386 tests using `check_function_bodies` now disable PIE to avoid mismatches in expected function body output.

i386: Disable stack protector for tests allocating arrays on the stack.

Fri, 01 May 2026 00:00:00 GMT
Stack protection is now disabled for specific i386 tests that allocate arrays on the stack to prevent failures when stack protection is enabled by default.

Suppress Doxygen Docs for Internals in

Fri, 01 May 2026 00:00:00 GMT
This commit prevents internal details within `` from being included in the generated Doxygen documentation.

Improve Doxygen Comments for Contents

Fri, 01 May 2026 00:00:00 GMT
This commit enhances Doxygen documentation for iterators in libstdc++ by using markdown, suppressing internal details, and improving comment wording.

Tweak Doxygen Comments for Experimental SIMD

Fri, 01 May 2026 00:00:00 GMT
This commit improves Doxygen documentation generation for the experimental SIMD features in libstdc++ by adjusting macro definitions and comment placement.

LoongArch: Improve xor+xor+ior sequence when possible [PR 96692]

Fri, 01 May 2026 00:00:00 GMT
LoongArch: Improve xor+xor+ior sequence when possible [PR 96692]

Fix Missing Braces in riscv_rtx_costs for slli.uw Pattern

Fri, 01 May 2026 00:00:00 GMT
Fixes a RISC-V code generation issue where an AND case lacked braces, leading to incorrect cost calculations and potentially skipping other pattern checks.

LoongArch: Allow printing symbolic name with "%c" in inline asm

Fri, 01 May 2026 00:00:00 GMT
LoongArch: Allow printing symbolic name with "%c" in inline asm

RISC-V: Add Synopsys RMX-100 series pipeline description.

Fri, 01 May 2026 00:00:00 GMT
Adds pipeline description for Synopsys RMX-100 series processor to the RISC-V GCC backend.

RISC-V: Move macro fusion logic to a separate file.

Fri, 01 May 2026 00:00:00 GMT
The RISC-V macro fusion logic was moved to riscv-fusion.cc to prevent riscv.cc from becoming too large.

RISC-V: Add Synopsys RHX-100 series pipeline description.

Fri, 01 May 2026 00:00:00 GMT
Adds pipeline description for Synopsys RHX-100 series processor to the RISC-V GCC backend.

RISC-V: Optimize power-of-2 boundary comparisons in conditional moves.

Fri, 01 May 2026 00:00:00 GMT
Optimizes conditional moves by converting power-of-2 boundary comparisons into shift-based equality tests.

Adjust objsz Arg in __strcat_chk -> __stpcpy_chk Transformation

Fri, 01 May 2026 00:00:00 GMT
The compiler now correctly transforms calls to `__strcat_chk` into calls to `__stpcpy_chk` when optimizing `strlen`, avoiding potential buffer overflows.

Testsuite: Prevent linking top-level assembly tests as PIE.

Fri, 01 May 2026 00:00:00 GMT
Top-level assembly tests are now linked without PIE to avoid runtime text relocations.

Avoid use-before-definition within library unit subprograms.

Fri, 01 May 2026 00:00:00 GMT
The compiler now correctly inserts attribute-related subprograms for library units, preventing use-before-definition errors.

Access to enum definition at run time

Thu, 30 Apr 2026 00:00:00 GMT
Yair Lenga seeks feedback on a GCC plugin that generates enum metadata at compile time for runtime access in C.

34th Guangzhou Fair 2026 Overseas Property, Immigration & Study Abroad Expo

Thu, 30 Apr 2026 00:00:00 GMT
Advertisement for the Guangzhou Overseas Property, Immigration & Study Abroad Expo in August 2026.

Access to enum definition at run time

Thu, 30 Apr 2026 00:00:00 GMT
Yair Lenga acknowledges David Malcolm's suggestion of ref-track plugins and will investigate them.

Gcc-14-20260430 is now available

Thu, 30 Apr 2026 00:00:00 GMT
A new snapshot of GCC 14 is available for testing.

GCC 16.1 Released

Thu, 30 Apr 2026 00:00:00 GMT
GCC 16.1 is released with GNU C++20 as default, experimental C++26 features, enhanced C23 support, and an Algol68 frontend.

Welcome GCC GSoC 2026 participants!

Thu, 30 Apr 2026 00:00:00 GMT
GCC welcomes five contributors for Google Summer of Code 2026, working on static analysis, GCC Rust, OpenMP, and OpenACC.

Ada: Fix build of GNAT tools with coverage enabled

Thu, 30 Apr 2026 00:00:00 GMT
Fixes the build of GNAT tools when code coverage is enabled.

Ada: Fix spurious error on primitive function of tagged task type

Thu, 30 Apr 2026 00:00:00 GMT
The Ada compiler no longer incorrectly reports an error related to the controlling result subtype in primitive functions of tagged task types.

Process operand NO_REGS class for register cost calculation

Thu, 30 Apr 2026 00:00:00 GMT
Fixes register cost calculation for operands with the NO_REGS class, potentially changing generated code.

C++ Contracts: Fix testsuite failure due to incorrect caching.

Thu, 30 Apr 2026 00:00:00 GMT
Prevents caching of constexpr function results when contract violations occur, fixing a testsuite failure.

Fix soft conflict and hard register cost calculation

Thu, 30 Apr 2026 00:00:00 GMT
Corrects the use of conflict allocno mode when finding soft conflicts in IRA, improving code generation.

Update gennews for GCC 16.

Thu, 30 Apr 2026 00:00:00 GMT
The `gennews` script, which generates release notes, is updated for GCC 16.

Do Not Assume URBG::result_type Exists

Thu, 30 Apr 2026 00:00:00 GMT
The `ranges::sample` and `ranges::shuffle` algorithms now work with random number generators that don't define `result_type`, improving compatibility.

libstdc++: Remove duplicated mdspan::is_constant_wrapper.

Thu, 30 Apr 2026 00:00:00 GMT
Removes a duplicated `__is_constant_wrapper` in libstdc++, replacing it with `std::__is_constant_wrapper_v` from the `utility` header.

libstdc++: Improve SFINAE-friendliness of `std::unique_ptr::operator`.

Thu, 30 Apr 2026 00:00:00 GMT
Makes `std::unique_ptr::operator` SFINAE-friendly by adding a constraint for C++20 and adjusting the noexcept-specifier for older standards.

libstdc++: Use hardware_destructive_interference_size in atomic.cc.

Thu, 30 Apr 2026 00:00:00 GMT
The libstdc++ now uses `std::hardware_destructive_interference_size` for aligning atomic variables to improve performance.

libstdc++: Add to freestanding headers [PR125112]

Thu, 30 Apr 2026 00:00:00 GMT
Fixes freestanding builds of libstdc++ by including .

LoongArch: Fix ICE caused by incomplete split conditions [PR125057].

Thu, 30 Apr 2026 00:00:00 GMT
This patch fixes an internal compiler error (ICE) in the LoongArch backend by completing the split conditions for vector moves.

MAINTAINERS: Add myself to write after approval

Thu, 30 Apr 2026 00:00:00 GMT
The MAINTAINERS file now lists Christopher Bazley as a contributor with write access after approval.

RISC-V: Prevent tuple vector modes from tying to non-tuple modes.

Thu, 30 Apr 2026 00:00:00 GMT
Fixes type conversions when using RISC-V vector intrinsics with the zvl extension by preventing tuple vector modes from being tieable to non-tuple modes.

Tree-optimization/125088 - some TLC to the new vect_bb_slp_scalar_cost

Thu, 30 Apr 2026 00:00:00 GMT
The SLP vectorization cost estimation code is refactored for clarity and to avoid Coverity warnings.

x86: Disable 16-bit immediate stores when TARGET_LCP_STALL is enabled

Thu, 30 Apr 2026 00:00:00 GMT
Avoid 16-bit immediate integer store when TARGET_LCP_STALL is enabled.

x86_cse: Add X86_CSE_CONST_VECTOR for native CONST_VECTOR.

Thu, 30 Apr 2026 00:00:00 GMT
GCC's x86 common subexpression elimination (CSE) now handles CONST_VECTOR and constant integer loads more efficiently.

Reorder code for pragma Interrupts_System_By_Default.

Thu, 30 Apr 2026 00:00:00 GMT
Code related to the `Interrupts_System_By_Default` pragma has been reordered for alphabetical consistency and improved readability.

Allow limited type initialization via constructors.

Thu, 30 Apr 2026 00:00:00 GMT
Ada now supports initializing limited types using constructors, enhancing type safety and flexibility.

Revert "Remove unnecessary workaround".

Thu, 30 Apr 2026 00:00:00 GMT
A previous commit that removed a workaround in Ada has been reverted.

libstdc++: Implement P4206R0: Revert string support in std::constant_wrapper.

Thu, 30 Apr 2026 00:00:00 GMT
libstdc++: Implement P4206R0: Revert string support in std::constant_wrapper.

Gcc-13-20260429 is now available

Wed, 29 Apr 2026 00:00:00 GMT
GCC 13 snapshot is available for testing.

RFC: Optimize unsigned division by constant when wider machine modes are available

Wed, 29 Apr 2026 00:00:00 GMT
RFC: Optimize unsigned division by constant when wider machine modes are available

Revert back asap

Wed, 29 Apr 2026 00:00:00 GMT
Inquiry about the operational status of an email address for a potential business project.

Second GCC 16.1 Release Candidate available from gcc.gnu.org

Wed, 29 Apr 2026 00:00:00 GMT
Confirmation that GCC 16.1 RC2 bootstraps and tests cleanly on Power architectures.

AArch64: Clean up code models by removing unused definitions.

Wed, 29 Apr 2026 00:00:00 GMT
This commit simplifies AArch64 code model handling by removing unused code model definitions, without changing generated code.

AArch64: Handle opts_set parameter properly in aarch64_option_restore

Wed, 29 Apr 2026 00:00:00 GMT
The AArch64 backend now correctly restores options, avoiding potential inconsistencies when target options are overridden.

bitintlower: Padding bit fixes, part 6 [PR123635]

Wed, 29 Apr 2026 00:00:00 GMT
This commit fixes an issue in bitintlower on big-endian architectures related to padding bits and overflow handling in multiplication.

c++: Fix up REFLECT_BASE comparison

Wed, 29 Apr 2026 00:00:00 GMT
This commit fixes an ICE (Internal Compiler Error) in `cp_tree_equal` when comparing `REFLECT_BASE` nodes in C++ reflection.

C++ Modules: Handle typedef struct { } A with reflection

Wed, 29 Apr 2026 00:00:00 GMT
Fixes module merging for typedefs to unnamed types when reflection is enabled.

C++ Modules: Fix merging of member functions

Wed, 29 Apr 2026 00:00:00 GMT
Declaration merging now considers whether a member function has an implicit or explicit object parameter to avoid ICEs.

Fix a bug in updating live info during rematerialization.

Wed, 29 Apr 2026 00:00:00 GMT
The compiler's register allocation phase now correctly handles multi-register pseudo-registers during rematerialization.

Use correct allocno when building conflicts in IRA.

Wed, 29 Apr 2026 00:00:00 GMT
A bug in the IRA conflict building process has been fixed by using the correct allocno, improving internal assertions.

C++/reflection: Propagate cv-qualifiers for SPLICE_SCOPE.

Wed, 29 Apr 2026 00:00:00 GMT
Fixes propagation of const/volatile qualifiers for SPLICE_SCOPE in C++ reflection.

Match: Simplify patterns for `a != b` implies a or b is non-zero

Wed, 29 Apr 2026 00:00:00 GMT
The compiler's pattern-matching code for simplifying logical expressions is now more concise.

Disable epilogue vectorization for certain x86 shift tests.

Wed, 29 Apr 2026 00:00:00 GMT
Epilogue vectorization is temporarily disabled for specific x86 shift tests to ensure consistent pass/fail results with varying cost comparison settings.

Fix a bug in finding conflicts during rematerialization.

Wed, 29 Apr 2026 00:00:00 GMT
The LRA rematerialization pass now uses the correct mode when identifying register conflicts, preventing incorrect rematerialization.

Adjust x86 vectorization tests for cost comparison.

Wed, 29 Apr 2026 00:00:00 GMT
GCC test suite updates include duplicating vectorization tests with explicit cost comparison flags to ensure accurate behavior.

HPPA64: Remove incorrect statement about GNU ld support.

Wed, 29 Apr 2026 00:00:00 GMT
The documentation for HPPA64 no longer incorrectly claims GNU ld is supported on HP-UX 11.

i386: Add support for HYGON c86-4g series processors

Wed, 29 Apr 2026 00:00:00 GMT
Adds support for HYGON c86-4g series processors with appropriate cost models and tuning.

Libsanitizer: Fix up build against latest kernel headers

Wed, 29 Apr 2026 00:00:00 GMT
This commit fixes a build failure in libsanitizer caused by the removal of the linux/scc.h header from recent Linux kernels.

Libstdc++: Adjust SIMD functions to handle 64-bit long double on x86

Wed, 29 Apr 2026 00:00:00 GMT
The libstdc++ SIMD functions now handle 64-bit long double types on x86 architectures.

Libstdc++: Format all contiguous ranges using span

Wed, 29 Apr 2026 00:00:00 GMT
Libstdc++ now formats all contiguous ranges as spans, enabling non-locking formatter optimization.

Libstdc++: Map 64-bit long double to double on SSE

Wed, 29 Apr 2026 00:00:00 GMT
libstdc++ now maps 64-bit `long double` to `double` on SSE when using the `-mlong-double-64` option.

Libstdc++: Follow the standard for numeric_limits::traps

Wed, 29 Apr 2026 00:00:00 GMT
Libstdc++ now correctly sets `numeric_limits::traps` to `false`, aligning with the C++ standard.

Libstdc++: Test ATOMIC__LOCK_FREE macros for

Wed, 29 Apr 2026 00:00:00 GMT
This commit adds a test case for the ATOMIC__LOCK_FREE macros in , ensuring compliance with the C++ standard.

Niter: Make MAX_DOMINATORS_TO_WALK configurable at runtime

Wed, 29 Apr 2026 00:00:00 GMT
The maximum number of dominators to walk in loop analysis can now be configured at runtime via a new `--param` option.

OpenMP: Enable declare mapper on target data directives

Wed, 29 Apr 2026 00:00:00 GMT
Extends support for OpenMP declare mapper to target enter/exit/data directives, aligning with OpenMP 5.2.

testsuite: Add plugin to verify bits/std.cc exports

Wed, 29 Apr 2026 00:00:00 GMT
A new GCC plugin verifies that all necessary symbols from `bits/std.cc` are exported, preventing omissions in the standard library's module interface.

Testsuite: Improve failure detection

Wed, 29 Apr 2026 00:00:00 GMT
The GCC testsuite now reliably detects test failures, preventing them from going unnoticed.

testsuite: Add C++ plugin to check for libstdc++ header uglification

Wed, 29 Apr 2026 00:00:00 GMT
A new GCC plugin checks for proper name uglification in libstdc++ headers, improving code obfuscation.

Testsuite: Fix and enhance cond-add-vec tests.

Wed, 29 Apr 2026 00:00:00 GMT
Adjustments to conditional add vector tests ensure that the correct transformations are applied, especially when using AVX-512.

testsuite: Diagnose non-uglified names even in requires exprs

Wed, 29 Apr 2026 00:00:00 GMT
The GCC testsuite now checks for non-uglified names in requires expressions, lambda parameters, and captures, enhancing code obfuscation capabilities.

SLP: Keep scalar statements for instance roots in externs

Wed, 29 Apr 2026 00:00:00 GMT
Fixes SLP vectorization to prevent errors when instance roots are mentioned in externs of other instances.

x86_cse: Convert CONST_VECTOR load to constant integer load

Wed, 29 Apr 2026 00:00:00 GMT
The x86 compiler can now convert constant vector loads into constant integer loads, improving code generation for certain operations.

ada: GNATprove inlining/unrolling messages now controlled by two Booleans

Wed, 29 Apr 2026 00:00:00 GMT
ada: GNATprove inlining/unrolling messages now controlled by two Booleans

Adjust bugbox URL in GNATprove mode.

Wed, 29 Apr 2026 00:00:00 GMT
Bug reports for FSF frontend crashes in GNATprove mode now point to the SPARK repository.

Dermatologist Contacts

Tue, 28 Apr 2026 00:00:00 GMT
Dermatologist Contacts

Forge: Add scaffolding for managing forge labels

Tue, 28 Apr 2026 00:00:00 GMT
Forge: Add scaffolding for managing forge labels

GSoC 2026: Extending -fanalyzer for CPython API Checking (Bug 107646)

Tue, 28 Apr 2026 00:00:00 GMT
GSoC 2026: Extending -fanalyzer for CPython API Checking (Bug 107646)

RFC: AutoFDO GCOV Profile Format Version 4

Tue, 28 Apr 2026 00:00:00 GMT
Reviewer requests a sample data file to create a GNU poke pickle for the proposed AutoFDO GCOV profile format.

Fix register elimination for INC/DEC RTL instructions.

Tue, 28 Apr 2026 00:00:00 GMT
This patch corrects a typo in the LRA pass that prevented the proper elimination of hard registers for increment/decrement RTL instructions.

Fortran: Avoid symbol collisions with internal names

Tue, 28 Apr 2026 00:00:00 GMT
Fortran now prefixes internally generated symbols with two underscores to prevent naming conflicts.

Update EnableTaggingAbi for RISC-V Linux.

Tue, 28 Apr 2026 00:00:00 GMT
GCC now correctly enables pointer tagging in the userspace ABI for RISC-V Linux, fixing an error during HWASAN initialization.

Improve equality test of sign bit splat against zero

Tue, 28 Apr 2026 00:00:00 GMT
GCC now optimizes equality tests on RISC-V by converting sign bit splats against zero into simpler less-than/greater-than-or-equal tests.

Enable RISC-V to generate shNadd instructions.

Tue, 28 Apr 2026 00:00:00 GMT
Improve RISC-V code generation by promoting intermediate operations from SI to DI, enabling the use of shNadd instructions.

BB SLP: Enabling reduction root finding for sum-of-diff kind of patterns

Tue, 28 Apr 2026 00:00:00 GMT
This commit enables vectorization of "sum of diffs" patterns by allowing the SLP vectorizer to recognize chains involving both PLUS and MINUS expressions.

IRA: Fix implicit preference calculation for hard registers.

Tue, 28 Apr 2026 00:00:00 GMT
This patch corrects an issue in the IRA that could lead to suboptimal code generation by improving the hard register preference calculation.

C++: Avoid ICE with [[trivial_abi]]

Tue, 28 Apr 2026 00:00:00 GMT
Fixes an internal compiler error (ICE) when using the [[trivial_abi]] attribute in C++ templates.

C, middle-end: Implement C2Y N3747 paper, Integer Sets, v5

Tue, 28 Apr 2026 00:00:00 GMT
Implements the C2Y N3747 paper, allowing signed _BitInt(1) and changing the type of 0wb to _BitInt(1).

Enable AVX-512 epilogue optimisations for ZNVER6.

Tue, 28 Apr 2026 00:00:00 GMT
The compiler can now use AVX-512 optimisations that avoid zeroing registers at function ends on AMD Zenver6 CPUs.

Fold-mem-offsets: Move RISC-V size-optimization workaround to the backend.

Tue, 28 Apr 2026 00:00:00 GMT
A workaround for RISC-V size optimizations has been moved from the fold-mem-offsets pass to the RISC-V backend, improving performance for other targets.

Libstdc++: Update documentation about default -std option.

Tue, 28 Apr 2026 00:00:00 GMT
The libstdc++ documentation now correctly describes the default value for the ``-std`` compiler option.

Range-op-float: Avoid ICE on undefined ranges

Tue, 28 Apr 2026 00:00:00 GMT
Fixes an internal compiler error (ICE) that occurs when processing undefined ranges in floating-point operations.

Libstdc++: Update C++23 status table.

Tue, 28 Apr 2026 00:00:00 GMT
The libstdc++ documentation now reflects the C++23 features included in GCC 16.

i386: Avoid Redundant Argument Classification in construct_container

Tue, 28 Apr 2026 00:00:00 GMT
This commit optimizes argument handling in the i386 backend by removing a redundant call to classify_argument in construct_container.

LRA: Fix mode of subreg of const in constant pool.

Tue, 28 Apr 2026 00:00:00 GMT
This patch corrects the mode used for subregisters of constants placed in the constant pool by the LRA.

RISC-V: Support Zalasr extension.

Tue, 28 Apr 2026 00:00:00 GMT
GCC now supports the RISC-V Zalasr extension for load-acquire/store-release operations, improving synchronization primitives.

gcc/toplev.cc: Output mangled function names with -fstack-usage

Tue, 28 Apr 2026 00:00:00 GMT
The -fstack-usage option now outputs mangled function names.

Improve x86 epilogue loop selection with cost comparison.

Tue, 28 Apr 2026 00:00:00 GMT
The compiler now prefers existing epilogues unless a new candidate offers optimal vectorization, resolving a test failure.

Adjust x86 strided vectorization tests for cost comparison.

Tue, 28 Apr 2026 00:00:00 GMT
Strided vectorization tests in GCC are updated with explicit cost comparison flags and adjusted code generation expectations.

Improve masked main loop selection for x86 vectorization.

Tue, 28 Apr 2026 00:00:00 GMT
The compiler now prefers masked main loops when they reduce epilogue iterations on x86, preventing performance regressions.

libgomp.fortran/map-subarray-6.f90: Fix and robustify

Tue, 28 Apr 2026 00:00:00 GMT
Fixed and improved the `map-subarray-6.f90` test in libgomp.fortran, addressing initialization issues and adding more checks for pointer handling.

Libsanitizer: RISC-V now supports HWASAN.

Tue, 28 Apr 2026 00:00:00 GMT
Enables building libsanitizer with HWASAN support for RISC-V targets.

libstdc++: Make pointer_traits::pointer_to constexpr for main template.

Tue, 28 Apr 2026 00:00:00 GMT
The `pointer_traits::pointer_to` function in libstdc++ is now `constexpr` since C++20, allowing compile-time evaluation.

Improve libstdc++ handling of leap second expiry time

Tue, 28 Apr 2026 00:00:00 GMT
libstdc++ can now use its built-in leap second list even after the expiry date by consulting the OS tzdata, avoiding filesystem reads where possible.

LoongArch: harden SSP canary set and test routines [PR 125049]

Tue, 28 Apr 2026 00:00:00 GMT
LoongArch: harden SSP canary set and test routines [PR 125049]

MAINTAINERS: Add myself to write after approval and DCO.

Tue, 28 Apr 2026 00:00:00 GMT
The MAINTAINERS file was updated to grant write access to a new developer after approval and DCO sign-off.

Fix typo in phiprop's can_handle_load function.

Tue, 28 Apr 2026 00:00:00 GMT
This patch corrects a typo in the phiprop optimization pass, ensuring that load operations are handled correctly during propagation.

Enable address tagging on 64-bit RISC-V with pointer masking.

Tue, 28 Apr 2026 00:00:00 GMT
GCC now supports hardware-assisted address sanitization (HWASan) on RISC-V 64-bit architectures with pointer masking.

Implement ``force_l32`` Target-Specific Attribute

Tue, 28 Apr 2026 00:00:00 GMT
The Xtensa backend gained a ``force_l32`` attribute to enable sub-word reads from instruction memory in other languages besides C.

FOSSY 2026 toolchain track North America, Aug 6-9

Mon, 27 Apr 2026 00:00:00 GMT
FOSSY 2026 toolchain track North America, Aug 6-9

Policy on use of LLM tools and bug fixes

Mon, 27 Apr 2026 00:00:00 GMT
Policy on use of LLM tools and bug fixes

RFC: AutoFDO GCOV Profile Format Version 4

Mon, 27 Apr 2026 00:00:00 GMT
RFC: AutoFDO GCOV Profile Format Version 4

RFC: AutoFDO GCOV Profile Format Version 4

Mon, 27 Apr 2026 00:00:00 GMT
RFC: AutoFDO GCOV Profile Format Version 4

Update br_mispredict_factor for generic tunings

Mon, 27 Apr 2026 00:00:00 GMT
The `br_mispredict_factor` for generic AArch64 tunings is updated from 6 to 7, improving performance on SPEC2017 fp rate.

aarch64/testsuite: add LTO coverage for branch-protection notes and attributes

Mon, 27 Apr 2026 00:00:00 GMT
aarch64/testsuite: add LTO coverage for branch-protection notes and attributes

build: Add diagnostics/ to TAGS

Mon, 27 Apr 2026 00:00:00 GMT
The build system now includes the diagnostics/ directory when generating TAGS files for Emacs.

Fix decltype(id) for pointer-to-data-member access expressions

Mon, 27 Apr 2026 00:00:00 GMT
Fixes an issue where `decltype` incorrectly deduced the type of pointer-to-data-member access expressions, yielding `const int` instead of `int`.

Defer completion of streamed-in cNTTPs in C++ modules

Mon, 27 Apr 2026 00:00:00 GMT
This commit defers the completion of streamed-in constant non-type template parameters (cNTTPs) in C++ modules to avoid lazy loading recursion.

Diagnostics: Update status comment in html-sink.cc

Mon, 27 Apr 2026 00:00:00 GMT
Updates a status comment in html-sink.cc.

Add splitters to improve andn generation

Mon, 27 Apr 2026 00:00:00 GMT
Add splitters to improve andn generation

Fix some cost calculation.

Mon, 27 Apr 2026 00:00:00 GMT
Fix some cost calculation.

Fix reg notes update

Mon, 27 Apr 2026 00:00:00 GMT
Fix reg notes update

Update gcc sv.po

Mon, 27 Apr 2026 00:00:00 GMT
This commit updates the Swedish translation file (sv.po) for GCC.

Detect more czero opportunities on RISC-V

Mon, 27 Apr 2026 00:00:00 GMT
The RISC-V backend now recognizes more cases where `czero.eqz` can replace a sequence of `sgt`, `snez`, and `and` instructions.

Fix some typos and remove unused code

Mon, 27 Apr 2026 00:00:00 GMT
Fix some typos and remove unused code

Ivopts: Improve doloop support for enum and bitint types

Mon, 27 Apr 2026 00:00:00 GMT
Extends doloop recognition to enum and bitint types by converting them to a full mode integer type.

Libgdiagnostics: Doc fixes

Mon, 27 Apr 2026 00:00:00 GMT
Fixes documentation for libgdiagnostics, correcting indentation and a duplicate entry.

Libstdc++: Fixes std::is_scalar for std::meta::info.

Mon, 27 Apr 2026 00:00:00 GMT
`std::is_scalar` now correctly identifies `std::meta::info` as a scalar type, as required by the C++ standard.

Simplify conditional additions involving constants and vectors.

Mon, 27 Apr 2026 00:00:00 GMT
GCC simplifies conditional expressions of the form 'x != CST1 ? x + CST2 : CST3' to 'x + CST2' when CST1 + CST2 == CST3, including uniform vectors.

RISC-V: Combine vec_duplicate + vmsgtu.vv to vmsgtu.vx based on GR2VR cost

Mon, 27 Apr 2026 00:00:00 GMT
Combines vec_duplicate + vmsgtu.vv to vmsgtu.vx when the cost of GR2VR is zero.

RISC-V: Add tests for vector duplicate and vmsgtu.vv combine

Mon, 27 Apr 2026 00:00:00 GMT
Adds test cases for combining vec_duplicate and vmsgtu.vv to vmsgtu.vx with different GR2VR costs.

Testsuite Fixed bitint-95.c Test.

Mon, 27 Apr 2026 00:00:00 GMT
The bitint-95.c test now includes necessary guards for bitint features, preventing failures on targets without full `_BitInt` support.

Tree-optimization Lowers mempcpy to memcpy When Result is Unused.

Mon, 27 Apr 2026 00:00:00 GMT
The compiler now optimizes `mempcpy` calls to `memcpy` when the return value is ignored, potentially improving performance.

Testsuite Extended object-readelf to accept regexes.

Mon, 27 Apr 2026 00:00:00 GMT
The testsuite's object-readelf function now supports regular expressions for more flexible checks of object file metadata.

Tree-optimization: Avoids ICE with niter Analysis and UBSAN.

Mon, 27 Apr 2026 00:00:00 GMT
The compiler now avoids an internal compiler error (ICE) when using niter analysis with UBSAN by preventing negation of the most negative signed integer.

ada: Fix ICE on Case_Expression a Pragma_Predicate

Mon, 27 Apr 2026 00:00:00 GMT
ada: Fix ICE on Case_Expression a Pragma_Predicate

Gcc-17-20260426 is now available

Sun, 26 Apr 2026 00:00:00 GMT
A new GCC 17 snapshot is available for download.

Second GCC 16.1 Release Candidate available from gcc.gnu.org

Sun, 26 Apr 2026 00:00:00 GMT
Second GCC 16.1 Release Candidate available from gcc.gnu.org

Second GCC 16.1 Release Candidate available from gcc.gnu.org

Sun, 26 Apr 2026 00:00:00 GMT
Frank Scheiner reports that the second GCC 16.1 release candidate bootstrapped fine on ia64-linux.

Improve equality comparisons of a logical AND expressions

Sun, 26 Apr 2026 00:00:00 GMT
GCC on RISC-V now optimizes equality comparisons of logical AND results, potentially reducing code size and improving instruction scheduling.

PR tree-optimization/124715: pow(0,-1) sets errno with -fmath-errno

Sun, 26 Apr 2026 00:00:00 GMT
GCC now avoids transforming pow(x,-1) into 1.0/x when x could be zero and `-fmath-errno` is enabled, preventing incorrect errno settings.

C: Argument expressions may be evaluated too often by typeof.

Sun, 26 Apr 2026 00:00:00 GMT
Fixes a bug where argument expressions within `typeof` were evaluated multiple times.

i386: Refactor AVX512 comparisons in machine description sse.md.

Sun, 26 Apr 2026 00:00:00 GMT
GCC's x86 backend now has a cleaner organization of AVX512 vector comparisons, avoiding nonsensical instruction combinations.

install: Use Binutils over binutils

Sun, 26 Apr 2026 00:00:00 GMT
The GCC install documentation now consistently uses "Binutils" (capitalized) instead of "binutils" when referring to the project.

libstdc++: Fix numeric save offset on Zone lines [PR124851]

Sun, 26 Apr 2026 00:00:00 GMT
Fixes a bug in libstdc++ that caused incorrect timezone offsets when Zone lines specified numeric DST save values.

rtl-optimization: Simplify vec_select of a vec_select.

Sun, 26 Apr 2026 00:00:00 GMT
GCC now simplifies consecutive vector permutations, reducing redundant instructions and improving code generation for vector operations.

Tree-optimization: Fixed ICE with recurrence vectorization.

Sun, 26 Apr 2026 00:00:00 GMT
The compiler avoids an internal compiler error (ICE) during recurrence vectorization by properly guarding against hitting the last statement when searching for…

Fwd: Please cherry pick to merge this patch from LLVM upstream

Sat, 25 Apr 2026 00:00:00 GMT
A patch merged into LLVM upstream fixes a build breakage in GCC caused by recent Linux kernel changes to libsanitizer.

GCC 16.1 Release Candidate available from gcc.gnu.org

Sat, 25 Apr 2026 00:00:00 GMT
Frank Scheiner reports that GCC 16.1 RC1 bootstrapped fine on ia64-linux and the testsuite results are even better than before.

Gcc-16-20260425 is now available

Sat, 25 Apr 2026 00:00:00 GMT
A new GCC 16 snapshot is available for download.

Policy on use of LLM tools and bug fixes

Sat, 25 Apr 2026 00:00:00 GMT
The discussion continues on the policy for using LLMs in GCC development, focusing on appropriate use cases and code review processes.

Policy on use of LLM tools and bug fixes

Sat, 25 Apr 2026 00:00:00 GMT
The discussion continues on the policy for using LLMs in GCC development, covering maintainability, code quality, and definition of LLM-generated code.

Policy on use of LLM tools and bug fixes

Sat, 25 Apr 2026 00:00:00 GMT
Chris Albert provides an updated, public link to their GCC commits that include LLM assistance.

Improve code generation for RISC-V shifts with constant counts

Sat, 25 Apr 2026 00:00:00 GMT
GCC now generates better code for RISC-V shifts with a constant count derived from a subtraction, such as ``31 - n``, by using the bitwise NOT operation.

Improve bit masking of shifted values

Sat, 25 Apr 2026 00:00:00 GMT
GCC on RISC-V now optimizes bit masking operations on shifted values, potentially reducing code size and improving performance.

c: Fix use of variably-modified structure/union types in nested context

Sat, 25 Apr 2026 00:00:00 GMT
Nested functions now correctly handle variably-modified structure/union types that depend on the enclosing context.

Optimize signed < 0 ? positive : min to (signed)min<(unsigned), (unsigned)positive>

Sat, 25 Apr 2026 00:00:00 GMT
GCC now optimizes ternary expressions where a signed value is compared to zero against the minimum of the signed value and a positive one, reducing code size a…

testsuite: Fix gcc.target/x86_64/abi tests on FreeBSD

Sat, 25 Apr 2026 00:00:00 GMT
The GCC testsuite now passes the x86_64 ABI tests on FreeBSD by adding `.note.GNU-stack` and adjusting compiler arguments.

Remove redundant m_curr_insn initialization/de-initialization

Fri, 24 Apr 2026 00:00:00 GMT
Removes redundant initialization and de-initialization of `m_curr_insn` in the `narrow_gp_writes` class for AArch64, simplifying the code.

arm: Fix MVE load/store with writeback intrinsics [PR124870]

Fri, 24 Apr 2026 00:00:00 GMT
arm: Fix MVE load/store with writeback intrinsics [PR124870]

Disallow reflection on block-scope extern declarations in C++.

Fri, 24 Apr 2026 00:00:00 GMT
The C++ reflection feature now forbids reflecting on block-scope extern declarations, aligning with the CWG 3065 resolution and fixing a crash.

Enable compare costs by default for x86 vectorization.

Fri, 24 Apr 2026 00:00:00 GMT
GCC now enables vector cost comparison by default for x86, improving vectorization decisions.

libstdc++: Support integer-class sized range in inplace_vector.

Fri, 24 Apr 2026 00:00:00 GMT
Allows `inplace_vector` to accept ranges sized by integer-class types by casting the range size to `size_t`.

Libstdc++: Merged concept for ranges with static sized.

Fri, 24 Apr 2026 00:00:00 GMT
Consolidates duplicated static size concepts into a single `ranges::__static_sized_range` concept.

Libstdc++: Make ref_view statically sized if R has static size

Fri, 24 Apr 2026 00:00:00 GMT
Makes `ref_view` statically sized when the underlying range `R` has a static size, avoiding runtime dereferences.

Libstdc++: Static_assert that static sized range size is less than inplace_vector capacity

Fri, 24 Apr 2026 00:00:00 GMT
Adds static assertions to `inplace_vector` to ensure the size of a statically-sized input range doesn't exceed its capacity.

Builtins for C++26 integer atomic reductions

Thu, 23 Apr 2026 00:00:00 GMT
The author provides a detailed explanation with litmus tests demonstrating the necessity of new builtins for C++26 integer atomic reductions due to memory mode…

Fortran coarray tests now require target sleep due to recent changes.

Thu, 23 Apr 2026 00:00:00 GMT
Fixes test failures for Fortran coarrays by requiring target sleep where calls were recently added.

tree-ssa-strlen: Use gimple_build/gimple_convert_to_ptrofftype

Thu, 23 Apr 2026 00:00:00 GMT
The strlen pass in GCC now uses gimple_build and gimple_convert_to_ptrofftype for building GIMPLE statements, simplifying the code.

ada: Minor cosmetic refactoring

Thu, 23 Apr 2026 00:00:00 GMT
ada: Minor cosmetic refactoring

libstdc++: Expand tests for std::type_order.

Wed, 22 Apr 2026 00:00:00 GMT
Expanded libstdc++ tests for `std::type_order` to include arrays of unknown bounds, function types/pointers, and data/function member pointers.

Libstdc++ Constrains Tuple Move Constructor for C++20

Wed, 22 Apr 2026 00:00:00 GMT
The libstdc++ `std::tuple` move constructor is now constrained in C++20 mode, ensuring it's only available when all elements are move-constructible.

c++/reflection: Fix error with ODR-used inline consteval variables.

Tue, 21 Apr 2026 00:00:00 GMT
The compiler now correctly handles ODR-used inline variables of consteval-only types by checking for DECL_INITIAL.

Chrec: Move rtype Definition Closer to Its Use

Tue, 21 Apr 2026 00:00:00 GMT
The rtype variable in tree-chrec.cc is now defined only within the scope where it's actually used, improving code clarity.

C++: Fix handling of && after a class definition.

Mon, 20 Apr 2026 00:00:00 GMT
The compiler now correctly parses rvalue references (&&) immediately following a class definition, fixing a regression.

C++: Correctly Print EXACT_DIV_EXPR as '/'

Mon, 20 Apr 2026 00:00:00 GMT
GCC now prints EXACT_DIV_EXPR as `/` instead of `unknown operator`, aligning the output with FLOOR_DIV_EXPR.

c++: constexpr union with no active member [PR124910]

Mon, 20 Apr 2026 00:00:00 GMT
c++: constexpr union with no active member [PR124910]

Improve diagnostic messages for dependent C++ splices.

Mon, 20 Apr 2026 00:00:00 GMT
This commit improves error messages for dependent splices in C++ reflection, providing more helpful diagnostics to developers.

Support Constant_Reference in Iterable aspect.

Fri, 17 Apr 2026 00:00:00 GMT
Ada's Iterable aspect now supports `Constant_Reference` functions for container iteration.

phiopt: Trigger CFG cleanup when cselim-limited makes changes.

Thu, 16 Apr 2026 00:00:00 GMT
The phiopt pass now triggers control flow graph cleanup when the cselim-limited optimization makes changes, preventing empty basic blocks.

Ada removes an unnecessary overflow suppression workaround

Thu, 16 Apr 2026 00:00:00 GMT
The Ada front end removes a no-longer-needed workaround for overflow suppression.

RISC-V: Use vnsrl instruction for even-odd shuffles.

Wed, 15 Apr 2026 00:00:00 GMT
GCC now uses vnsrl instruction in RISC-V for even-odd shuffles, potentially improving performance versus vcompress.

x86: Remove DI/SI registers from x86_64 integer return registers

Wed, 15 Apr 2026 00:00:00 GMT
The x86-64 ABI only uses AX/DX and XMM0/XMM1 for function returns, so GCC now reflects that.

Ada applies ignored ghost regions for ignored pragmas

Wed, 15 Apr 2026 00:00:00 GMT
The Ada front end now marks ignored pragmas as belonging to 'ignored ghost regions,' improving their cleanup.

LoongArch: Add RTX cost support for ORDERED comparison.

Tue, 14 Apr 2026 00:00:00 GMT
The LoongArch backend now defines the RTX cost for the ORDERED operation to prevent incorrect cost evaluations and test failures.

Completes removal of obsolete project manager sources

Tue, 14 Apr 2026 00:00:00 GMT
This commit removes a final leftover function related to a long-removed project manager from the GCC Ada front end.

The Ada front end moves gnatmake-specific logic from libgnat

Tue, 14 Apr 2026 00:00:00 GMT
The Ada front end now relocates `gnatmake`-specific library naming logic from the shared `libgnat` to `gnatmake` itself, eliminating a hardcoded workaround.

libiberty: avoid exponential back reference issue in D demangler

Tue, 14 Apr 2026 00:00:00 GMT
libiberty: avoid exponential back reference issue in D demangler

Call back-end even in case of errors.

Fri, 10 Apr 2026 00:00:00 GMT
The Ada compiler now calls the back-end even with front-end errors in GNATprove mode for SARIF reporting.

GCC testsuite documentation for `arm_mixed_fp` is now complete.

Fri, 10 Apr 2026 00:00:00 GMT
The GCC testsuite documentation now includes a description of `arm_mixed_fp`, clarifying its purpose and usage.

Testsuite: Add phiprop testcase that is already fixed.

Thu, 09 Apr 2026 00:00:00 GMT
A new test case for the phiprop optimization pass has been added to the GCC testsuite.

Tree-optimization: Avoid Shift-by-64 Undefined Behavior

Thu, 09 Apr 2026 00:00:00 GMT
The DeBruijn CLZ table validator now avoids undefined behavior by special-casing the MSB bit, resolving a long-standing issue.

ada: Fix directories being identified as executables on Windows

Thu, 09 Apr 2026 00:00:00 GMT
ada: Fix directories being identified as executables on Windows

Avoid stack overflow in verify_vssa for large functions

Wed, 08 Apr 2026 00:00:00 GMT
Reduces stack usage in `verify_vssa` by replacing recursion with iteration.

testsuite: munge absolute paths like compiler do on Windows

Wed, 08 Apr 2026 00:00:00 GMT
testsuite: munge absolute paths like compiler do on Windows

Fixes ICE with -Winfinite-recursion by using iteration instead of recursion.

Tue, 07 Apr 2026 00:00:00 GMT
Avoids stack overflows when using -Winfinite-recursion on very large functions by switching to an iterative approach.

Testsuite gets a predictable ordered array for comparison

Tue, 07 Apr 2026 00:00:00 GMT
This patch fixes a `TypeError` in the GCC testsuite by ensuring arrays used for comparison have a predictable order without attempting to hash dictionaries.

libstdc++ leverages allocate_at_least for string and vector.

Sat, 04 Apr 2026 00:00:00 GMT
The `std::string` and `std::vector` classes in libstdc++ now use `allocate_at_least` to better utilize allocated memory, potentially improving performance with…

testsuite: scan for case sensitive file extensions in lto.exp

Thu, 02 Apr 2026 00:00:00 GMT
testsuite: scan for case sensitive file extensions in lto.exp

libstdc++: Restore allocator constructor for std::packaged_task.

Wed, 01 Apr 2026 00:00:00 GMT
Restores the allocator constructor for `std::packaged_task` and removes incorrect allocator-related specializations from `std::promise`.

Enhances error message for incomplete record definitions

Wed, 01 Apr 2026 00:00:00 GMT
This commit improves error reporting when an Ada record is frozen with incompletely defined component types.

Simplify RTX comparisons of bitwise operations with constants.

Tue, 31 Mar 2026 00:00:00 GMT
GCC now simplifies certain comparisons involving bitwise AND/OR operations with constants, potentially fixing an ICE on RISC-V.

Reapply extension after bit insert in store-forwarding

Tue, 31 Mar 2026 00:00:00 GMT
GCC's avoid-store-forwarding pass now correctly reapplies sign/zero extensions to values after bit-field insertions for non-eliminated loads.

PhiProp now handles stores between loads and PHIs.

Sat, 28 Mar 2026 00:00:00 GMT
PhiProp pass can now propagate values through a store instruction between a load and the PHI node, improving optimization for certain C++ code patterns.

Phi-node Propagation: Skip Clobbers More Effectively

Sat, 28 Mar 2026 00:00:00 GMT
The phi-node propagation pass now skips over clobbering instructions more effectively, improving optimization opportunities.

Ada: Fix bug when reading multibyte utf-8 character

Fri, 27 Mar 2026 00:00:00 GMT
A bug in the Ada compiler that caused issues when reading multibyte UTF-8 characters from a terminal has been fixed.

Avoid-store-forwarding: Reject bit-inserts that clobber live hard regs

Fri, 27 Mar 2026 00:00:00 GMT
The avoid-store-forwarding pass now avoids generating bit-insert sequences that would corrupt live hardware registers.

Avoid-store-forwarding: Continue BB analysis after complex memory ops

Fri, 27 Mar 2026 00:00:00 GMT
The avoid-store-forwarding pass now continues analysis after encountering complex memory operations, potentially catching more optimization opportunities.

Phirop: Factor out the VDEF check into a new function.

Fri, 27 Mar 2026 00:00:00 GMT
The VDEF check in the phiprop pass is now in its own function, improving code readability and maintainability.

Phirop: Move the VUSE check before dominator tests.

Fri, 27 Mar 2026 00:00:00 GMT
The VUSE check now happens before the dominator tests in the phiprop pass, which should result in a small optimization.

match: Simplify min|max(a+|-c,b+|-c) to min|max(a,b)+|-c

Fri, 27 Mar 2026 00:00:00 GMT
The compiler now simplifies `min|max(a+|-c,b+|-c)` to `min|max(a,b)+|-c`, potentially improving code efficiency.

phiprop: Move vuse variable declaration closer to its use.

Fri, 27 Mar 2026 00:00:00 GMT
This commit improves code readability in the phiprop pass by moving the declaration of the `vuse` variable closer to where it is used.

RISC-V: Use more whole-register loads and stores.

Fri, 27 Mar 2026 00:00:00 GMT
The RISC-V backend can now emit more whole-register loads and stores, improving code generation by allowing more flexible vsetvl placement.

Fix typo in Ada documentation

Thu, 26 Mar 2026 00:00:00 GMT
This commit fixes a minor typo in the Ada documentation related to destructors.

Ada: Cleanup of Analyze_Aspect_Specifications and related code

Thu, 26 Mar 2026 00:00:00 GMT
This commit improves the Ada compiler by refactoring code related to aspect specifications, enhancing readability and maintainability.

Complete fix for light runtime configuration in Ada

Thu, 26 Mar 2026 00:00:00 GMT
This commit removes an unused include directive to complete a previous fix for light runtime configurations in Ada.

Configure EditorConfig for Git commit messages

Thu, 26 Mar 2026 00:00:00 GMT
GCC's repository now includes EditorConfig settings for Git commit messages, enforcing consistent formatting.

Match: Add simplifications for min/max comparisons.

Thu, 26 Mar 2026 00:00:00 GMT
The compiler can now simplify comparisons between min(a, b) and max(a, b) to true, false, a!=b, or a==b.

RISC-V: Remove blanket else in riscv_hard_regno_mode_ok

Thu, 26 Mar 2026 00:00:00 GMT
This commit removes unreachable code in `riscv_hard_regno_mode_ok` function in the RISC-V backend.

RISC-V: Fix format specifier

Thu, 26 Mar 2026 00:00:00 GMT
This commit fixes a format specifier warning in the RISC-V backend when using a GCC 15 host compiler.

Add boolean version of Warnings_Suppressed in Ada

Wed, 25 Mar 2026 00:00:00 GMT
The commit introduces a boolean overload of `Warnings_Suppressed` in Ada to simplify checking for suppressed warnings.

Fix light runtime configurations in Ada by moving code

Wed, 25 Mar 2026 00:00:00 GMT
This commit resolves a dependency issue in Ada's light runtime configurations by moving environment-related code from `argv.c` to `env.c`.

Improve Ada error message insertion methods

Wed, 25 Mar 2026 00:00:00 GMT
This commit refactors Ada's error message insertion logic to improve code organization and remove redundancy.

analyzer: add known_function handler for strcasecmp

Wed, 25 Mar 2026 00:00:00 GMT
analyzer: add known_function handler for strcasecmp

Analyzer: Split exploded_path into its own files

Wed, 25 Mar 2026 00:00:00 GMT
The GCC analyzer's `exploded_path` implementation has been split into separate files for better organization.

pru: Inline muldi3 when optimizing for speed

Wed, 25 Mar 2026 00:00:00 GMT
Inlines 32-bit multiplication operations for PRU when optimizing for speed, improving performance.

pru: Transform patterns to use hard register constraints

Wed, 25 Mar 2026 00:00:00 GMT
Refactors PRU backend to use hard register constraints, simplifying register class definitions.

match: (X C1) + (X << C2) -> X * (C1 + (1 << C2)) [PR124886]

Wed, 25 Mar 2026 00:00:00 GMT
match: (X * C1) + (X << C2) -> X * (C1 + (1 << C2)) [PR124886]

Refine conformance warning logic in Ada

Tue, 24 Mar 2026 00:00:00 GMT
This commit simplifies Ada's conformance warning logic by removing redundant checks.

Fixes Crash During Unnesting With Qualified Bounds

Tue, 24 Mar 2026 00:00:00 GMT
Fixes a crash in the Ada compiler that occurred during unnesting when dealing with qualified bounds, specifically for package entities.

Ada: Implement AI22-0154 (Revised resolution of indexing aspects)

Tue, 24 Mar 2026 00:00:00 GMT
The Ada compiler now correctly handles indexing aspects, adhering to the revised rules specified in AI22-0154, improving code legality and diagnostics.

Avoid-store-forwarding: Remove unnecessary store_exprs_del mechanism

Tue, 24 Mar 2026 00:00:00 GMT
The avoid-store-forwarding pass removes an unnecessary mechanism that caused O(n^2) behavior for large basic blocks.

Analyzer: Split setjmp/longjmp implementation to its own file

Mon, 23 Mar 2026 00:00:00 GMT
The GCC analyzer's `setjmp`/`longjmp` handling is now in its own file for better code organization.

Analyzer: Split pending_diagnostic subclasses from region-model.cc

Mon, 23 Mar 2026 00:00:00 GMT
The GCC analyzer's diagnostic subclasses have been split into separate files for better organization and maintainability.

libcody Now Supports Non-ASCII Module Names

Sun, 22 Mar 2026 00:00:00 GMT
Extends libcody to allow non-ASCII characters in module names, fixing an issue where such characters were incorrectly rejected.

Implement Error Filtering and Deletion in Ada Compiler

Sat, 21 Mar 2026 00:00:00 GMT
Adds a new function, Filter_And_Delete_Errors, to allow targeted removal of error messages in the Ada compiler.

Removes Obsolete Return Handling Code

Sat, 21 Mar 2026 00:00:00 GMT
Removes code related to temporary aggregate returns, which are no longer created by the Ada compiler.

Refactor Error Handling in Ada Compiler

Sat, 21 Mar 2026 00:00:00 GMT
Refactors error handling code in the Ada compiler by extracting common functionality to erroutc and adding new subprograms for message deletion.

analyzer: add test_passthrough for getenv

Sat, 21 Mar 2026 00:00:00 GMT
analyzer: add test_passthrough for getenv

Simplify Suppressed Warning Checks in Ada Compiler

Fri, 20 Mar 2026 00:00:00 GMT
Introduces Warning_Is_Suppressed to simplify checks for suppressed warnings in the Ada compiler.

Improve Debug Messaging in the Ada Compiler

Fri, 20 Mar 2026 00:00:00 GMT
The Ada compiler's internal debugging messages have been enhanced with more contextual information, including locations and fixes.

Add Function to Check for Suppressed Loop Warnings

Fri, 20 Mar 2026 00:00:00 GMT
Adds In_Loop_With_Suppressed_Warnings to check if warnings are suppressed within loops, improving Ada compiler diagnostics.

Consolidate Error Message Deletion in Ada Compiler

Fri, 20 Mar 2026 00:00:00 GMT
Refactors error message deletion code in the Ada compiler by extracting common code into a new subprogram, Delete_Error_Msg.

analyzer: model mktemp-family success/failure outcomes [PR105890]

Fri, 20 Mar 2026 00:00:00 GMT
analyzer: model mktemp-family success/failure outcomes [PR105890]

ext-dce: Narrow Sign-Extending Loads to Zero-Extending When Upper Bits Are Dead

Fri, 20 Mar 2026 00:00:00 GMT
The ext-dce pass now optimizes sign-extending loads to zero-extending loads when the upper bits are unused, improving code generation.

ext-dce: Fix Off-By-One in Subreg Liveness for 32-Bit Modes

Fri, 20 Mar 2026 00:00:00 GMT
Corrects a bit liveness calculation in ext-dce, enabling lw -> lwu narrowing on RV64.

AArch64 gains support for vectorizing long-to-float conversions.

Wed, 18 Mar 2026 00:00:00 GMT
The compiler can now vectorize conversions from long to float on AArch64, improving performance when converting arrays of integers to floating-point values.

analyzer: model getenv

Wed, 18 Mar 2026 00:00:00 GMT
analyzer: model getenv

Ada: Avoid spurious resolution errors in inlined static functions

Tue, 17 Mar 2026 00:00:00 GMT
Fixes spurious resolution errors by unsetting Comes_From_Source in inlined static Ada functions.

Fixes Compiler Crash with Expression Functions

Tue, 17 Mar 2026 00:00:00 GMT
A compiler crash has been fixed when using expression functions in Ada.

Ada No Longer Depends on gnat_envp for Environment Variables

Tue, 17 Mar 2026 00:00:00 GMT
The Ada runtime no longer relies on the non-standard `gnat_envp` global for accessing environment variables, improving compatibility and correctness.

analyzer: generalize mktemp-family warnings; add -Wanalyzer-mkostemp-redundant-flags [PR105890]

Tue, 17 Mar 2026 00:00:00 GMT
analyzer: generalize mktemp-family warnings; add -Wanalyzer-mkostemp-redundant-flags [PR105890]

Pretty-Print Loop Parameter Specification Filters

Mon, 16 Mar 2026 00:00:00 GMT
The Ada compiler's debug output now includes filters for loop parameter specifications, improving debuggability.

Ada: Fix assertion failure in entry barrier with object notation calls

Mon, 16 Mar 2026 00:00:00 GMT
Prevents an assertion failure when calling a subprogram using object notation within an Ada entry barrier.

Suppress Warning for Quantified Expressions with Filters

Mon, 16 Mar 2026 00:00:00 GMT
The Ada compiler now suppresses a warning about unused variables in quantified expressions when a filter is present.

Retain enumeration literal names in GNATprove mode

Mon, 16 Mar 2026 00:00:00 GMT
This commit prevents the Ada compiler from discarding enumeration literal names when in GNATprove mode to support the `Image` attribute.

Suppress Warning About Unused Variable in Trivial Quantification

Fri, 13 Mar 2026 00:00:00 GMT
The Ada compiler now suppresses warnings about unused variables in trivial quantification expressions (e.g., `for all X in ... => True`).

Ada: Implement missing overflow check for Integer_128 in GNATProve mode

Fri, 13 Mar 2026 00:00:00 GMT
Adds overflow checks for universal integer to 128-bit integer conversions in GNATProve to enhance code verification.

AArch64: Add preliminary definitions for SVE2.2/SME2.2

Thu, 12 Mar 2026 00:00:00 GMT
This commit introduces preliminary definitions for SVE2.2 and SME2.2 in GCC, laying the groundwork for future SVE enhancements.

AArch64: Add __ARM_FEATURE_ macros for SVE2.2 and SME2.2.

Thu, 12 Mar 2026 00:00:00 GMT
The compiler now defines `__ARM_FEATURE_` macros for the SVE2.2 and SME2.2 extensions on AArch64.

Ada: Enable inheritance of pragma/aspect unchecked_union

Thu, 12 Mar 2026 00:00:00 GMT
Enables derived types to inherit the `unchecked_union` pragma/aspect in Ada, ensuring consistent behavior.

Add Chain Check to VAST for Entity Consistency

Thu, 12 Mar 2026 00:00:00 GMT
Adds a check to ensure entity chains in VAST are consistent, specifically for entities used as Scope.

Ada: Fix reStructuredText markup

Thu, 12 Mar 2026 00:00:00 GMT
Corrected errors in reStructuredText markup within the Ada documentation.

Simplify Implementation of Instantiation Messages in Ada

Thu, 12 Mar 2026 00:00:00 GMT
The Ada compiler's message generation for template instantiations has been refactored for clarity and reduced code duplication.

Ada: Enhance debugging with entity chain print routines and consistency checks

Thu, 12 Mar 2026 00:00:00 GMT
Improves Ada debugging by adding routines to print entity chains and check their consistency, aiding in compiler development.

analyzer: new warnings -Wanalyzer-mkstemp-missing-suffix and -Wanalyzer-mkstemp-of-string-literal [PR105890]

Thu, 12 Mar 2026 00:00:00 GMT
analyzer: new warnings -Wanalyzer-mkstemp-missing-suffix and -Wanalyzer-mkstemp-of-string-literal [PR105890]

Diagnostics: Use label_text in diagnostics::option_id_manager

Thu, 12 Mar 2026 00:00:00 GMT
Improves memory management in the diagnostics subsystem by using label_text for option IDs.

match.pd: Relax single_use for fold-to-zero comparisons

Thu, 12 Mar 2026 00:00:00 GMT
match.pd: Relax single_use for fold-to-zero comparisons

Document the gnatg switch in Ada

Wed, 11 Mar 2026 00:00:00 GMT
The commit adds documentation for the gnatg switch in Ada, including a new file and updates to existing documentation.

Ada: Add volatile abstract state to Interfaces.C.Strings creation functions

Wed, 11 Mar 2026 00:00:00 GMT
Adds volatile abstract state to C string creation functions in Ada to accurately model new pointer values for verification.

Ada: Suppress warning about unused quantified variables with junk names

Wed, 11 Mar 2026 00:00:00 GMT
Suppressed warnings for trivially-named unused variables in Ada quantified expressions.

Ada: Enable overloading resolution for Last and Previous in Iterable aspects

Wed, 11 Mar 2026 00:00:00 GMT
Fixes overloading resolution for `Last` and `Previous` primitives in Ada's `Iterable` aspects.

Ada: Fix iterator for Iterable aspect rejected without subtype indication.

Tue, 10 Mar 2026 00:00:00 GMT
The Ada compiler now correctly handles iterators for the Iterable aspect even when a subtype isn't explicitly specified.

Ada Now Requires Compilation Units to Have No Indentation

Tue, 10 Mar 2026 00:00:00 GMT
The Ada compiler now enforces a style rule disallowing indentation for the start of compilation units.

Add comment clarifying vectorization cost estimation.

Tue, 10 Mar 2026 00:00:00 GMT
A comment was added to GCC's vectorizer to explain the cost estimation of loop prologue and epilogue.

Use scalar costs for peeling cost estimation in vectorizer.

Tue, 10 Mar 2026 00:00:00 GMT
GCC's vectorizer now uses pre-calculated scalar costs when estimating loop peeling costs, improving accuracy and compile time.

Account scalar costs into vect_body.

Tue, 10 Mar 2026 00:00:00 GMT
GCC now records scalar statement costs as part of the vectorized loop body, ensuring accurate cost calculation for vectorization.

Simplify API for estimating peeling costs in vectorizer.

Tue, 10 Mar 2026 00:00:00 GMT
GCC simplifies the API and implementation of the function estimating loop peeling costs in the vectorizer.

Ada: Fix handling of qualified subtype with static predicate in array aggregate.

Mon, 09 Mar 2026 00:00:00 GMT
The Ada compiler now correctly handles qualified subtypes with static predicates in array aggregates.

Ada: Improve handling of return object declarations in conditional expressions

Mon, 09 Mar 2026 00:00:00 GMT
Enhances Ada compiler to distribute return object declarations into conditional expressions, lifting a previous limitation.

Ada: Refactor Inline_Static_Function_Call

Mon, 09 Mar 2026 00:00:00 GMT
The `Inline_Static_Function_Call` in Ada compiler has been refactored to reduce code nesting.

Ada: Calculate the sloc adjustment for inlined static functions

Mon, 09 Mar 2026 00:00:00 GMT
The Ada compiler now correctly calculates source location when inlining static functions, improving error message accuracy.

analyzer: add known function handling for atoi, atol, and atoll

Mon, 09 Mar 2026 00:00:00 GMT
analyzer: add known function handling for atoi, atol, and atoll

PRU: Allow device spec to append assembler command line.

Sat, 07 Mar 2026 00:00:00 GMT
The PRU target now allows appending assembler command-line options using the device spec.

Ada: Fix assertion failure for improper aggregate operation.

Fri, 06 Mar 2026 00:00:00 GMT
The Ada compiler no longer crashes when encountering an improper aggregate operation.

Ada: Fix assertion failure on invalid String_Literal aspect.

Fri, 06 Mar 2026 00:00:00 GMT
The Ada compiler no longer crashes when encountering an invalid `String_Literal` aspect.

Only remove REG_EQUAL/EQUIV notes on successful optimization

Fri, 06 Mar 2026 00:00:00 GMT
Fixes a bug in the extended dead code elimination pass where REG_EQUAL/EQUIV notes were removed even when the optimization failed.

ext-dce: Promote narrow operations to wider mode when extended bits are dead

Fri, 06 Mar 2026 00:00:00 GMT
The extended dead code elimination pass now promotes narrow operations to wider modes when extended bits are unused, which can enable better code generation on…

Avoid live code-generation for stmts kept as scalars

Thu, 05 Mar 2026 00:00:00 GMT
GCC now avoids unnecessary live code generation for scalar statements used in SLP graph leafs, simplifying the vectorization process.

Ada: Remove useless call to Can_Have_Formals.

Wed, 04 Mar 2026 00:00:00 GMT
Removes a useless call to `Can_Have_Formals` in `Is_Access_To_Subprogram_Wrapper` to fix an incorrect error message.

Ada: Stop adding .EXE to GNAT.Command_Line error messages.

Wed, 04 Mar 2026 00:00:00 GMT
GNAT no longer adds the .EXE suffix to command-line error messages to avoid testsuite differences.

Ada: Align alternate stack on Linux for address sanitizer.

Wed, 04 Mar 2026 00:00:00 GMT
The Ada runtime now aligns the alternate stack on Linux to meet the requirements of the address sanitizer.

Ada: Reject non-primitive operations in Finalizable aspect.

Wed, 04 Mar 2026 00:00:00 GMT
The Ada compiler now enforces that only primitive operations can be used in the `Finalizable` aspect.

Ada: Fix bogus visibility error for inherited operator of null extension.

Wed, 04 Mar 2026 00:00:00 GMT
The compiler no longer incorrectly flags visibility errors for inherited operators in null extensions.

RS6000 Gains Builtins for AES Acceleration Instructions

Wed, 04 Mar 2026 00:00:00 GMT
GCC now provides built-in functions for AES acceleration instructions on RS6000, enabled with the `-mcpu=future` option.

Remove warning about unused iterator variable in map clauses.

Wed, 04 Mar 2026 00:00:00 GMT
GCC no longer issues false positive warnings for unused iterator variables in OpenMP map clauses by removing the check from the gimplifier.

Ada: Fix unresolved symbols with partial -gnatVo compilation.

Tue, 03 Mar 2026 00:00:00 GMT
Addresses unresolved symbols when using partial `-gnatVo` compilation with standard containers.

Ada: Correct casing of reserved word in documentation.

Tue, 03 Mar 2026 00:00:00 GMT
Corrects the casing of a reserved word in the Ada documentation.

Ada: Protect against a predicate failure in VAST.

Tue, 03 Mar 2026 00:00:00 GMT
Adds a check to avoid a predicate failure in the VAST tree traversal.

Cost each BB vect live lane only once

Tue, 03 Mar 2026 00:00:00 GMT
GCC's vectorizer now costs each basic block's live lane only once, optimizing code generation for SLP trees.

Compute Full Scalar Statement Coverage During Vectorization

Tue, 03 Mar 2026 00:00:00 GMT
The compiler now computes full scalar statement coverage during basic block vectorization for simpler and more precise live lane determination and scalar costi…

Ada: Correct error message on use of 'Result with wrong prefix.

Mon, 02 Mar 2026 00:00:00 GMT
Fixes an incorrect error message related to the 'Result attribute with a wrong prefix.

Ada: Minor cleanup in aspect handling.

Mon, 02 Mar 2026 00:00:00 GMT
Uses Decorate to set fields for aspects, cleaning up the code.

Improve Code Flow in vect_slp_analyze_operations

Mon, 02 Mar 2026 00:00:00 GMT
This commit rearranges code within the vectorization analysis to improve code readability and isolate responsibilities.

Simplify Scalar Statement Coverage in vect_bb_slp_mark_live_stmts

Mon, 02 Mar 2026 00:00:00 GMT
The compiler now uses full scalar statement coverage to determine live lanes during vectorization more precisely.

Rewrite Analyze_Aspect_Specifications for clarity.

Sun, 01 Mar 2026 00:00:00 GMT
This commit refactors the Analyze_Aspect_Specifications function in the Ada compiler, improving code clarity and removing unnecessary gotos.

Fix recursive struct/union redeclaration with qualifiers

Sat, 28 Feb 2026 00:00:00 GMT
GCC now correctly handles recursive structure/union redeclarations involving qualifiers by checking for consistency after completing the variants.

RISC-V: Specify -mcpu When --with-cpu Is Used

Sat, 28 Feb 2026 00:00:00 GMT
The compiler now consistently uses `-mcpu` instead of `-march` when the `--with-cpu` option is used for RISC-V, aligning its behavior with explicit `-mcpu` usa…

AArch64 now initializes vectors from a common starting subsequence.

Thu, 26 Feb 2026 00:00:00 GMT
GCC now initializes AArch64 vectors more efficiently when elements can be generated from a common starting subsequence.

AArch64 now supports vector concatenation for sub-64-bit types.

Thu, 26 Feb 2026 00:00:00 GMT
GCC now handles 2-element `vec_concats` with scalar operands on AArch64, and emits `vec_duplicate` when operands are identical.

Avoid compiler hang with cyclic homonym lists.

Thu, 26 Feb 2026 00:00:00 GMT
The Ada compiler now avoids introducing cycles in homonym lists during error handling, preventing potential hangs.

Refactor APIs for Vectorization Operand Mapping

Thu, 26 Feb 2026 00:00:00 GMT
The APIs `vect_slp_child_index_for_operand` and `vect_get_operand_map` are updated to simplify how operand information is accessed during vectorization.

libstdc++: Optimize std::uninitialized_move to use memcpy when possible.

Thu, 26 Feb 2026 00:00:00 GMT
`std::uninitialized_move` and `std::uninitialized_move_n` are optimized to use `memcpy` when iterators are pointers, improving performance.

Introduce slp_oprnds Class to Manage SLP and GIMPLE Operands

Thu, 26 Feb 2026 00:00:00 GMT
A new helper class, slp_oprnds, facilitates the handling of operands between SLP and GIMPLE representations during vectorization.

Ada SARIF output now goes to current directory.

Wed, 25 Feb 2026 00:00:00 GMT
The Ada compiler now generates SARIF output files in the current working directory instead of next to the source file.

Fix crash on incorrect record field renaming.

Wed, 25 Feb 2026 00:00:00 GMT
This commit fixes a crash in the Ada compiler that occurred during incorrect renaming of record fields.

Avoid transient scope creation under GNATProve in more cases.

Wed, 25 Feb 2026 00:00:00 GMT
The Ada compiler avoids creating transient scopes under GNATProve mode even when only checking syntax and semantics.

Improve VIEW_CONVERT_EXPR Handling in vect_get_operand_map

Wed, 25 Feb 2026 00:00:00 GMT
The compiler now handles VIEW_CONVERT_EXPR nodes more cleanly during SLP vectorization by integrating the logic into `vect_get_operand_map`.

Libgo: Use 'gcloud storage cp' instead of deprecated 'gsutil cp'.

Wed, 25 Feb 2026 00:00:00 GMT
Switches from the deprecated 'gsutil cp' command to 'gcloud storage cp' in libgo's build scripts.

LoongArch: eliminate redundant extension after ctz.w

Wed, 25 Feb 2026 00:00:00 GMT
LoongArch: eliminate redundant extension after ctz.w

tree-optimization/124222 - rewrite BB SLP costing scalar coverage

Wed, 25 Feb 2026 00:00:00 GMT
GCC now uses vector coverage indicated by `SLP_TREE_TYPE` to improve and simplify basic block vector scalar costing, handling SLP patterns correctly.

Avoid transient scope creation under GNATProve mode.

Tue, 24 Feb 2026 00:00:00 GMT
The Ada compiler now avoids creating transient scopes under GNATProve mode, fixing a recent regression.

Fix premature VAST check on aspect consistency.

Tue, 24 Feb 2026 00:00:00 GMT
This commit adjusts a VAST check for aspect consistency in the Ada compiler, as it was being performed prematurely.

Introduce pretty-print-token-buffer.{cc,h}

Tue, 24 Feb 2026 00:00:00 GMT
Refactors diagnostic message handling by introducing pretty-print-token-buffer, improving token capture during pretty-printing.

Analyzer: Introduce `-Wanalyzer-div-by-zero` warning

Tue, 24 Feb 2026 00:00:00 GMT
The GCC analyzer now issues a `-Wanalyzer-div-by-zero` warning for potential division-by-zero errors.

Json: Implement JSON Pointer parsing (RFC 6901)

Tue, 24 Feb 2026 00:00:00 GMT
Adds JSON Pointer parsing (RFC 6901) to GCC's JSON library.

Json: Move pp_markup::quoted_json_pointer to its own header

Tue, 24 Feb 2026 00:00:00 GMT
Relocates pp_markup::quoted_json_pointer to its own header file for better code organization.

Add comment explaining the VAST 2-pass algorithm.

Tue, 24 Feb 2026 00:00:00 GMT
This commit adds a comment to the Ada compiler's VAST pass to explain the 2-pass algorithm.

Sarif-replay: Decode event IDs [PR123056]

Tue, 24 Feb 2026 00:00:00 GMT
Enables sarif-replay to decode event IDs within execution paths for round-trip SARIF processing.

Raise Program_Error for 'Constrained attribute on unchecked union parameters

Mon, 23 Feb 2026 00:00:00 GMT
The Ada compiler now raises Program_Error for the 'Constrained attribute when applied to non-In formal parameters of unchecked union types.

Fix discriminant check failure for unconstrained actual parameters

Mon, 23 Feb 2026 00:00:00 GMT
Fixes a bug where discriminant checks spuriously failed for unconstrained actual parameters in Ada when initialized by conditional expressions.

Rename Insert_Pragma to Insert_Aitem for broader functionality

Sat, 21 Feb 2026 00:00:00 GMT
The Ada compiler's `Insert_Pragma` procedure is renamed to `Insert_Aitem` to reflect its expanded support for attribute definition clauses.

Improve Aspect Specification Analysis

Fri, 20 Feb 2026 00:00:00 GMT
This commit cleans up and generalizes the `Analyze_Aspect_Specifications` procedure in the Ada compiler, in preparation for further improvements.

Disable inlining of subprograms with unchecked union parameters for GNATprove

Thu, 19 Feb 2026 00:00:00 GMT
The Ada compiler now prevents inlining of subprograms with unchecked union type formal parameters when compiling for GNATprove.

Disable dynamic accessibility checks when checks are suppressed

Thu, 19 Feb 2026 00:00:00 GMT
The Ada compiler no longer generates dynamic accessibility checks when accessibility checks are disabled or the `No_Dynamic_Accessibility_Checks` restriction i…

Simplify Limited Type test

Thu, 19 Feb 2026 00:00:00 GMT
The Ada compiler's test for limited types is simplified by removing a redundant condition.

Fix freezing of nested discriminated type

Thu, 19 Feb 2026 00:00:00 GMT
Fixes a compiler crash due to incorrect tree construction when freezing the base type of a nested discriminated type in Ada.

Apply check for all primitive equality operations in Ada

Wed, 18 Feb 2026 00:00:00 GMT
The compiler now checks for ghost equality functions in all branches when handling primitive subprograms in Ada.

Clean up aspects vs. pragmas in the Ada compiler

Wed, 18 Feb 2026 00:00:00 GMT
This commit cleans up minor inconsistencies and improves comments related to aspects and pragmas in the Ada compiler.

Fix crash evaluating class-wide preconditions with missing completion

Wed, 18 Feb 2026 00:00:00 GMT
This commit fixes a crash when evaluating class-wide preconditions for non-primitive subprograms with missing type completion in Ada.

match.pd: Remove bit set/bit clear branch mispredict

Wed, 18 Feb 2026 00:00:00 GMT
GCC now avoids branch mispredictions for certain bitwise operations by replacing conditional bit setting/clearing with unconditional operations.

Improve documentation and simplify `Is_Inherently_Limited_Type` in Ada

Wed, 18 Feb 2026 00:00:00 GMT
This commit improves documentation and simplifies the `Is_Inherently_Limited_Type` function by leveraging `Is_Immutably_Limited_Type`.

Add consistency checks for aspects and pragmas

Tue, 17 Feb 2026 00:00:00 GMT
VAST now includes checks for consistency between aspects and pragmas in Ada.

Ensure consistent handling of Master_Id for anonymous access result types

Tue, 17 Feb 2026 00:00:00 GMT
This commit standardizes the handling of `Master_Id` for anonymous access result types in Ada to improve consistency.

Ada: Disable Style Checks in System.Interrupt_Names Generation on VxWorks

Mon, 16 Feb 2026 00:00:00 GMT
Style checks are now disabled during the generation of `System.Interrupt_Names` for VxWorks.

Ada: Fixes System.Interrupt_Names Generation on VxWorks

Mon, 16 Feb 2026 00:00:00 GMT
The `System.Interrupt_Names` package is now correctly generated for VxWorks, handling a subtype declaration.

Remove spurious error on attribute Count with expansion disabled in Ada

Mon, 16 Feb 2026 00:00:00 GMT
This commit removes a false error on the `Count` attribute in specific scenarios where expansion is disabled.

Ada: Fixes build failure on Windows

Sat, 14 Feb 2026 00:00:00 GMT
This patch prevents the Ada compiler from filtering out comments in xsintnam.sed, resolving a build failure on Windows.

Ada: Fix build failure on Windows machines

Sat, 14 Feb 2026 00:00:00 GMT
This commit fixes an Ada build failure on Windows by removing the -E switch from the Makefile.

Ada: Adds suffix to names of procedures for accessibility checks

Fri, 13 Feb 2026 00:00:00 GMT
This commit renames procedures in `accessibility.adb` to clarify their purpose in accessibility checks for returns.

Ada: Implements overriding for tagged type primitives with First_Controlling_Parameter

Fri, 13 Feb 2026 00:00:00 GMT
This commit implements a rule for overriding primitives of tagged types that have the First_Controlling_Parameter aspect in Ada.

Ada: Fixes SPARK RM 6.9 Rule 32 check

Fri, 13 Feb 2026 00:00:00 GMT
This commit fixes a SPARK rule check to only apply to user-defined equality operations.

Ada: Fix error in deep delta array aggregate with others

Fri, 13 Feb 2026 00:00:00 GMT
The compiler no longer attempts an illegal scalar range check on the "others" choice in deep delta array aggregates.

Ada: Fixes missing accessibility check for anonymous access function result

Fri, 13 Feb 2026 00:00:00 GMT
This commit fixes a missing accessibility check for anonymous access function result in Ada, improving program safety.

Ada: Fixes build failure for Windows platforms

Fri, 13 Feb 2026 00:00:00 GMT
This commit adds a missing `with` clause to `s-interr__sigaction.adb`, resolving a build failure on Windows.

Document gnatdll -m switch in GNAT User's Guide

Thu, 12 Feb 2026 00:00:00 GMT
The documentation for the gnatdll -m switch has been copied from the help message into the GNAT User's Guide.

Ada: Makes Interrupt_State not require Ada.Interrupts

Thu, 12 Feb 2026 00:00:00 GMT
This commit removes the implicit dependency on `Ada.Interrupts` when using the `Interrupt_State` configuration pragma.

Ada: Fixes minor issues in interrupt handling

Thu, 12 Feb 2026 00:00:00 GMT
This commit fixes the task state for interrupt server tasks and improves comments and formatting in the Ada runtime library.

Missing initialization of aggregate components in Ada

Thu, 12 Feb 2026 00:00:00 GMT
Fixes a bug in Ada where tagged type conversions of qualified aggregate expressions could leave some components uninitialized.

Relocate Check_Valid_Ghost_Declaration in ada

Thu, 12 Feb 2026 00:00:00 GMT
The `Check_Valid_Ghost_Declaration` procedure in the Ada compiler has been relocated to maintain alphabetical order.

More memory efficient prange_storage

Wed, 11 Feb 2026 00:00:00 GMT
The `prange_storage` class now uses a more memory-efficient storage format that only allocates the required number of words.

Fix issue with qualified expressions of class-wide types in Ada

Tue, 10 Feb 2026 00:00:00 GMT
Fixes a long-standing issue in Ada with qualified expressions of class-wide types that could lead to spurious errors.

Implement SPARK RM 6.9 (23) for ghost code in Ada

Tue, 10 Feb 2026 00:00:00 GMT
Implements a rule for ghost code in SPARK Ada related to user-defined equality operations on record types.

Adds warnings for potentially-uninitialized padding bits.

Tue, 10 Feb 2026 00:00:00 GMT
Introduces `-Wzero-init-padding-bits=` to warn about code relying on zero-initialized padding, following a change in default behavior.

Simplify RISC-V Builtin Definitions

Tue, 10 Feb 2026 00:00:00 GMT
This commit simplifies the definition of RISC-V built-in functions within GCC.

scev/niter: Use INTEGRAL_NB_TYPE_P instead of direct comparison to INTEGER_TYPE

Tue, 10 Feb 2026 00:00:00 GMT
GCC's loop analysis now uses a more robust check for integer types, improving compatibility with extended integer types.

Add PIC/PIE support to large model

Mon, 09 Feb 2026 00:00:00 GMT
Added Position Independent Code (PIC) and Position Independent Executable (PIE) support to the AArch64 large memory model, improving code size.

Fix internal error on access to function as component via limited with

Mon, 09 Feb 2026 00:00:00 GMT
This commit fixes an internal compiler error related to accessing functions as components via limited with clauses in Ada.

Fixes Put_Image attribute_definition_clause being incorrectly ignored

Mon, 09 Feb 2026 00:00:00 GMT
The compiler was ignoring `Put_Image` aspect specifications defined using `attribute_definition_clause` syntax, now fixed.

Factor out common pattern in Exp_Ch6

Sat, 07 Feb 2026 00:00:00 GMT
This commit refactors the Exp_Ch6 module in the Ada compiler to extract a common code pattern, improving code maintainability.

Aarch64: Add support for range prefetch intrinsic

Fri, 06 Feb 2026 00:00:00 GMT
GCC now supports new AArch64 intrinsics for range prefetching, allowing better memory access optimization.

Fix recursion calls in Remove_Side_Effects

Thu, 05 Feb 2026 00:00:00 GMT
This commit fixes a latent issue in the Ada compiler's `Remove_Side_Effects` routine related to recursion calls.

Error on legal No_Return subprogram with formals subject to Type_Invariant

Thu, 05 Feb 2026 00:00:00 GMT
The Ada compiler no longer incorrectly flags errors for `No_Return` subprograms with formals subject to `Type_Invariant` aspects.

Rename value_range::set_type for Clarity

Thu, 05 Feb 2026 00:00:00 GMT
Renamed `value_range::set_type` to `value_range::set_range_class` to better reflect its purpose.

Fix Assertion_Level dependency for Runtime level

Wed, 04 Feb 2026 00:00:00 GMT
This commit corrects the dependency condition for the Runtime assertion level in the Ada compiler.

Normalize the handling of assertion policies

Wed, 04 Feb 2026 00:00:00 GMT
The Ada compiler now normalizes assertion policies to `Check` and `Ignore` to prevent internal logic errors.

AArch64: Deprecate -mpc-relative-literal-loads.

Tue, 03 Feb 2026 00:00:00 GMT
The option `-mpc-relative-literal-loads` is now deprecated for AArch64 due to issues with special symbols in the text section.

Range check now verifies the supplied range type.

Tue, 03 Feb 2026 00:00:00 GMT
Fixed an incorrect range check in get_tree_range that checked the value_range, not the supplied range type.

Ada: Remove unnecessary Is_Boolean_Aspect flag.

Mon, 02 Feb 2026 00:00:00 GMT
The Ada compiler removes the Is_Boolean_Aspect flag, which was unnecessary and had an incorrect comment.

Ada: Remove temporary Aspect_Unimplemented code.

Sun, 01 Feb 2026 00:00:00 GMT
The Ada compiler removes the temporary Aspect_Unimplemented code, which had been present since 2015.

Ada: Remove exception handling from aspects.

Sun, 01 Feb 2026 00:00:00 GMT
The Ada compiler removes exception handling related to aspects, simplifying the code.

Remove Tempdir package from Ada compiler

Sat, 31 Jan 2026 00:00:00 GMT
The `Tempdir` package has been removed from the Ada compiler, as its functionality is now provided by `System.OS_Lib`.

Remove Tempdir from gnatmake

Sat, 31 Jan 2026 00:00:00 GMT
The Ada compiler no longer duplicates the Create_Temp_File routine provided by System.OS_Lib.

Remove Tempdir from gnatname

Sat, 31 Jan 2026 00:00:00 GMT
The `Tempdir` package is removed from `gnatname` and replaced with `System.OS_Lib`.

Fix crash when using address clause on declare-expression constant

Wed, 28 Jan 2026 00:00:00 GMT
This commit fixes a crash in the Ada compiler that occurred when using an address clause on a constant defined within a declare-expression.

Ada: Align VxWorks version of System.Interrupts.

Tue, 27 Jan 2026 00:00:00 GMT
The Ada compiler aligns the VxWorks-specific version of System.Interrupts with a recent fix made to the main version.

Refactors task checking in Ada anonymous access returns

Mon, 26 Jan 2026 00:00:00 GMT
Refactors `Check_Anonymous_Access_Return_With_Tasks` to use a predicate for task checking in Ada.

Ada: Remove libutil dependency on Linux.

Mon, 26 Jan 2026 00:00:00 GMT
The Ada compiler removes the dependency on libutil when targeting Linux.

Fixes wrong comments in Ada runtime library

Mon, 26 Jan 2026 00:00:00 GMT
Fixes misleading comments in the Ada runtime library regarding masked interrupts.

Improves comments and fixes formatting in Ada runtime library

Mon, 26 Jan 2026 00:00:00 GMT
Corrects a comment and fixes a message string in the Ada runtime library for clarity.

Ada: Use correct scope when unnesting a subprogram.

Fri, 23 Jan 2026 00:00:00 GMT
The Ada compiler fixes a bug where incorrect scope was used when unnesting a subprogram, preventing a potential assertion failure.

Ada: Add missing assertion level check in SPARK mode.

Fri, 23 Jan 2026 00:00:00 GMT
The Ada compiler adds a missing check for assertion levels inside aspect specifications in SPARK mode.

RISC-V: Simplify vector comparison by removing cbranch_all patterns.

Fri, 23 Jan 2026 00:00:00 GMT
GCC's RISC-V backend no longer uses cbranch_all patterns for vector comparisons, simplifying the code.

M32C: Remove all support for the M32C target.

Fri, 23 Jan 2026 00:00:00 GMT
The M32C target, deprecated since GCC 16 due to lack of a maintainer, has been completely removed from the GCC codebase.

Ada's Image_Should_Call_Put_Image Renamed to Image_Must_Call_Put_Image.

Wed, 21 Jan 2026 00:00:00 GMT
The Ada runtime function Image_Should_Call_Put_Image was renamed to Image_Must_Call_Put_Image due to its semantics.

Ada: Correct crash with unchecked union components of formal parameters.

Wed, 21 Jan 2026 00:00:00 GMT
Fixes a compiler crash when comparing unchecked union components of formal parameters in Ada.

Fixes parsing error for generic formal functions with declare expressions

Wed, 21 Jan 2026 00:00:00 GMT
Resolves a parsing error when using declare expressions in default expressions for generic formal functions in Ada.

Fixes exception message for attaching non-handler procedures

Wed, 21 Jan 2026 00:00:00 GMT
Improves the error message when attaching a non-interrupt-handler procedure in Ada.

Fixes boolean flag handling for Unsigned_Base_Range aspect

Wed, 21 Jan 2026 00:00:00 GMT
Corrects an issue where the `Unsigned_Base_Range` aspect was erroneously enabled when set to `False`.

Ada Fixes Differences between 'Img and 'Image for Enumeration Types.

Wed, 21 Jan 2026 00:00:00 GMT
The Ada compiler now ensures 'Img behaves like 'Image for enumeration types when using Put_Image, and folds more aggressively.

Fixes rejection of deep delta aggregates with core Ada extensions

Wed, 21 Jan 2026 00:00:00 GMT
Enables deep delta aggregates when core Ada extensions are enabled (e.g., -gnatX).

Zicfilp landing pads are now consistently 4-byte aligned

Wed, 21 Jan 2026 00:00:00 GMT
The Zicfilp extension for RISC-V now correctly aligns non-local goto target labels and exception landing pads to 4 bytes, preventing runtime errors.

Enables the Unsigned_Base_Range aspect in Ada

Tue, 20 Jan 2026 00:00:00 GMT
Enables the `Unsigned_Base_Range` language extension in Ada, removing the need for the `-gnatd.u` switch.

Ada Sets Etype Before Analysis for Conditions Generated for 'Old Attribute.

Tue, 20 Jan 2026 00:00:00 GMT
This change sets the Etype decoration for conditions generated for the 'Old attribute in Ada, which is required for GNATprove analysis.

Ada Accepts Formal Function Defaults with -gnatX Core Extensions.

Tue, 20 Jan 2026 00:00:00 GMT
The Ada compiler now allows default values for formal functions when using core extensions (-gnatX).

Ada Updates References to Parameter Associations RM 6.4.1.

Tue, 20 Jan 2026 00:00:00 GMT
This commit updates references to the Ada Reference Manual (RM) section 6.4.1 to account for a new paragraph added by AI12-0095-1.

Ada Fixes Crash on Declare Expression in Contract on Access to Subprogram Type.

Tue, 20 Jan 2026 00:00:00 GMT
The Ada compiler no longer crashes when using a declare expression in a contract on access to a subprogram type.

Forward Prop Allow More Vector Permutations

Tue, 20 Jan 2026 00:00:00 GMT
The forward propagation pass now creates more vector permutation expressions, relying on a later pass to legalize them, improving optimization.

Ada Now Rejects Duplicate CPU/Priority Pragmas when Aspects are Present.

Mon, 19 Jan 2026 00:00:00 GMT
The Ada compiler now rejects `pragma CPU` and `pragma Priority` when they duplicate corresponding aspects already defined for a subprogram.

Analyzer: Avoid naked "new"

Mon, 19 Jan 2026 00:00:00 GMT
Modernizes the analyzer by replacing raw `new` with `std::make_unique` for memory management.

Ada: Freezing change for expression functions requires fix

Sun, 18 Jan 2026 00:00:00 GMT
Reverts part of a change that unnecessarily prevented the profile of dispatching operations from being frozen by their subprogram body.

fold-const.cc: Remove strict_overflow_p from tree_expr_nonnegative helpers

Sat, 17 Jan 2026 00:00:00 GMT
The compiler removes the `strict_overflow_p` flag from helper functions used by `tree_expr_nonnegative`, further simplifying the code.

fold-const.cc: Remove strict_overflow_p flag from tree_single_nonnegative_p

Sat, 17 Jan 2026 00:00:00 GMT
The compiler removes the `strict_overflow_p` flag from `tree_single_nonnegative_p` and related Gimple functions.

fold-const.cc: Remove fold_overflow_warning()

Sat, 17 Jan 2026 00:00:00 GMT
The compiler no longer uses `fold_overflow_warning()` and `pointer_may_wrap_p` in constant folding.

fold-const.cc: Overhaul tree_expr_nonnegative_(warn)_p

Sat, 17 Jan 2026 00:00:00 GMT
The compiler refactors `tree_expr_nonnegative_warnv_p` to remove `strict_overflow_p`, simplifying its API and eliminating associated code.

fold-const.cc: Remove strict_overflow_p from maybe_canonicalize_comparison

Sat, 17 Jan 2026 00:00:00 GMT
The compiler removes the `strict_overflow_p` flag and `fold_overflow_warning` calls from `maybe_canonicalize_comparison`.

fold-const.cc: Remove strict_overflow_p from tree_unary_nonnegative

Sat, 17 Jan 2026 00:00:00 GMT
The compiler removes the `strict_overflow_p` flag from `tree_unary_nonnegative` and updates related code in `gimple-fold.cc`.

Remove strict_overflow_p from tree_unary_nonzero_warnv_p

Sat, 17 Jan 2026 00:00:00 GMT
The strict_overflow_p flag was removed from tree_unary_nonzero_warnv_p, which was then renamed to tree_unary_nonzero_p.

Remove strict_overflow_p Flag from tree_expr_nonzero_warnv_p

Sat, 17 Jan 2026 00:00:00 GMT
The strict_overflow_p flag was removed from tree_expr_nonzero_warnv_p, which simplifies code and removes a call to fold_overflow_warn.

Remove strict overflow flag from make_range helpers

Sat, 17 Jan 2026 00:00:00 GMT
The strict_overflow flag was removed from make_range helpers, as part of deprecating the -Wstrict_overflow warning.

Remove strict_overflow_p flag from extract_muldiv

Sat, 17 Jan 2026 00:00:00 GMT
The strict_overflow_p flag was removed from extract_muldiv, part of deprecating -Wstrict-overflow.

Remove strict_overflow_p from tree_binary_nonzero_warnv_p

Sat, 17 Jan 2026 00:00:00 GMT
The strict_overflow_p flag was removed from tree_binary_nonzero_warnv_p, and the function was renamed to tree_binary_nonzero_p.

fold-const.cc: Remove strict_overflow_p from tree_binary_nonnegative

Sat, 17 Jan 2026 00:00:00 GMT
The compiler removes the `strict_overflow_p` flag from `tree_binary_nonnegative` and updates `gimple-fold.cc` accordingly.

Remove strict_overflow_p from tree_single_nonzero_warnv_p

Sat, 17 Jan 2026 00:00:00 GMT
The strict_overflow_p flag was removed from tree_single_nonzero_warnv_p and the function was renamed to tree_single_nonzero_p.

AArch64: Implement FMUL SME instruction.

Fri, 16 Jan 2026 00:00:00 GMT
This commit implements the FMUL SME instruction for AArch64, enhancing support for streaming floating-point multiplication.

Ada: Fix spurious error with First_Controlling_Parameter type

Fri, 16 Jan 2026 00:00:00 GMT
Fixes a false error when dispatching primitives have formals with First_Controlling_Parameter types.

Ada: Fix fallout from change to Analyze_Subprogram_Renaming

Fri, 16 Jan 2026 00:00:00 GMT
Corrects an issue caused by replacing an expression with its Original_Node in subprogram renaming analysis.

Ada Rejects Exceptional Contracts on No_Raise Subprograms.

Fri, 16 Jan 2026 00:00:00 GMT
The Ada compiler now rejects the SPARK-specific `Exceptional_Cases` and `Exit_Cases` pragmas when used with `No_Raise` subprograms.

Remove strict_overflow logic from tree-ssa-loop-ch.cc.

Fri, 16 Jan 2026 00:00:00 GMT
The loop closing pass no longer considers `strict_overflow`.

Testsuite: Remove all Wstrict-overflow tests.

Fri, 16 Jan 2026 00:00:00 GMT
All remaining tests specifically checking for `-Wstrict-overflow` behavior have been removed.

Remove code related to deferring -Wstrict-overflow warnings.

Fri, 16 Jan 2026 00:00:00 GMT
The compiler no longer defers `-Wstrict-overflow` warnings, since they are no longer issued.

Remove strict_overflow_p from range_entry

Fri, 16 Jan 2026 00:00:00 GMT
The strict_overflow_p flag has been removed from range_entry in tree-ssa-reassoc, further deprecating the -Wstrict-overflow warning.

Ada now supports C++ constructor calls in array aggregates

Thu, 15 Jan 2026 00:00:00 GMT
Adds support for calling C++ constructors within Ada array aggregates.

Ada: Fixes missing contract checks for calls to formal subprograms in instances

Thu, 15 Jan 2026 00:00:00 GMT
Ensures that preconditions on formal subprograms are checked when called within package instantiations.

Ada: Improve handling of Ghost => True/False for Abstract_State

Thu, 15 Jan 2026 00:00:00 GMT
Enhances handling of Ghost aspects for Abstract_State pragmas, adding error checks for invalid usage.

Ada: Improve error message for premature freezing of deferred constant

Thu, 15 Jan 2026 00:00:00 GMT
Enhances the error message for premature freezing of deferred constants by including the constant's name.

analyzer: use concrete_binding_map for compound_svalue (PR analyzer/123145)

Thu, 15 Jan 2026 00:00:00 GMT
analyzer: use concrete_binding_map for compound_svalue (PR analyzer/123145)

Ada: Streamline semantic analysis of expression functions

Wed, 14 Jan 2026 00:00:00 GMT
This commit streamlines the implementation of semantic analysis for expression functions in Ada, with no intended functional changes.

AArch64: Add zeroing forms for predicated SVE FP-to-integer conversions

Wed, 14 Jan 2026 00:00:00 GMT
The compiler now supports zeroing predication for SVE FP-to-integer conversion instructions under SVE2.2 or SME2.2.

SLP vectorizer now skips reduction subgroups of size one.

Wed, 14 Jan 2026 00:00:00 GMT
GCC’s SLP vectorizer now explicitly avoids creating size-one reduction subgroups, improving code generation quality.

Ada: Improve freezing of tagged types by expression functions in nested packages

Tue, 13 Jan 2026 00:00:00 GMT
Delays the generation of stand-alone expression functions to fix freezing issues with tagged types in nested packages.

Improve libstdc++ P0952 generate_cannonical tests.

Tue, 13 Jan 2026 00:00:00 GMT
The libstdc++ `generate_canonical` tests are reworked to improve coverage and reflect generator range sizes.

RISC-V: Add test for vec_duplicate + vmsle.vv combine with GR2VR cost 0, 1 and 15

Tue, 13 Jan 2026 00:00:00 GMT
Added new tests with assembly checks for RISC-V vectorization combining vec_duplicate and vmsle.vv into vmsle.vx, covering various GR2VR costs.

RISC-V: Combine vec_duplicate + vmsle.vv to vmsle.vx based on GR2VR cost

Tue, 13 Jan 2026 00:00:00 GMT
GCC now combines RISC-V ``vec_duplicate`` and ``vmsle.vv`` instructions into ``vmsle.vx`` when the cost of moving data to vector registers is low enough.

Ada: Handle call to C++ constructor in generic instantiation

Mon, 12 Jan 2026 00:00:00 GMT
This commit adds missing support for C++ constructor calls passed as generic formal subprogram parameters in Ada.

Ada: Fix finalization of renamed function call at library level

Mon, 12 Jan 2026 00:00:00 GMT
This commit fixes a regression where renaming a controlled function call at the library level could lead to a dangling reference.

Ada: Refine semantic analysis of expression functions

Sun, 11 Jan 2026 00:00:00 GMT
This commit streamlines semantic analysis of expression functions in Ada, eliminating some redundant checks and messages.

AArch64: Add zeroing forms for predicated SVE top FP conversions

Sat, 10 Jan 2026 00:00:00 GMT
The compiler now supports zeroing predication for several SVE FP conversion instructions, enabled under SVE2.2 or SME2.2.

AArch64: Implement changes for COMPACT and EXPAND SVE instructions

Sat, 10 Jan 2026 00:00:00 GMT
The Arm Scalable Vector Extension (SVE) now supports COMPACT and EXPAND instructions in streaming mode under SME2.2, with new intrinsics defined in the ACLE ma…

AArch64: Add zeroing forms for predicated SVE integer unary operations

Fri, 09 Jan 2026 00:00:00 GMT
GCC now supports zeroing predication for SVE integer unary operations on AArch64, leveraging SVE2.2 and SME2.2 for optimized code generation.

AArch64: Add zeroing forms for predicated SVE FP unary operations

Fri, 09 Jan 2026 00:00:00 GMT
The compiler now supports zeroing predication for SVE floating-point unary operations under SVE2.2 or SME2.2.

Ada: Improve analysis and diagnostics for the Initialize aspect in constructors.

Fri, 09 Jan 2026 00:00:00 GMT
The compiler now better enforces and diagnoses issues related to the Initialize aspect in Ada constructors, preventing incorrect initialization order, flagging…

AArch64: Add zeroing forms for predicated SVE int-/FP-to-FP conversions

Fri, 09 Jan 2026 00:00:00 GMT
The compiler now supports zeroing predication for SVE integer/FP-to-FP conversion instructions under SVE2.2 or SME2.2 when the merge operand is a constant zero…

AArch64: Add zeroing forms for predicated SVE bit reversal operations

Fri, 09 Jan 2026 00:00:00 GMT
The compiler now supports zeroing predication for SVE bit reversal operations under SVE2.2 or SME2.2.

Ada: Enforce dynamic accessibility check for conditional expressions

Thu, 08 Jan 2026 00:00:00 GMT
This commit enforces a missing dynamic accessibility check when assigning a conditional expression to a stand-alone object of an anonymous access type (saooaaa…

Fix endless loop when using Address aspect with dynamic addresses.

Thu, 08 Jan 2026 00:00:00 GMT
The compiler no longer enters an infinite loop when freezing objects with dynamic addresses.

Refactor Analyze_Subprogram_Body_Helper for readability.

Thu, 08 Jan 2026 00:00:00 GMT
This commit refactors the Analyze_Subprogram_Body_Helper function for improved code clarity.

Make "finally" a non-reserved keyword when using GNAT extensions.

Wed, 07 Jan 2026 00:00:00 GMT
The keyword "finally" can now be used as an identifier when GNAT extensions are enabled.

Libstdc++ Fixes Potential Null-Dereference in istreambuf_iterator

Wed, 07 Jan 2026 00:00:00 GMT
Libstdc++ now avoids a potential null-dereference warning in `istreambuf_iterator` by adjusting how the internal stream buffer pointer is handled.

Ada: Fix visibility bug in generic with precondition on formal subprogram

Wed, 07 Jan 2026 00:00:00 GMT
This commit fixes a visibility issue in Ada generics with preconditions on formal subprograms, ensuring correct analysis and resolution of references.

Fix crash when using pragma Ignore_Pragma in SPARK mode.

Wed, 07 Jan 2026 00:00:00 GMT
The compiler no longer crashes when using `pragma Ignore_Pragma` in SPARK mode due to improved handling of protected bodies.

Print restrictions in the SARIF report

Wed, 07 Jan 2026 00:00:00 GMT
The Ada compiler now includes restriction information in its SARIF (Static Analysis Results Interchange Format) output.

RISC-V: Use long jumps when crossing section boundaries.

Wed, 07 Jan 2026 00:00:00 GMT
GCC now uses long jumps for RISC-V when jumping between code sections that may be far apart, preventing linker errors with -freorder-blocks-and-partition.

Add support for implicit parameterless constructors.

Tue, 06 Jan 2026 00:00:00 GMT
The Ada compiler now supports implicit parameterless constructors for tagged types.

Ada: Use aggregate in Save_Scan_State for better coverage.

Tue, 06 Jan 2026 00:00:00 GMT
The Ada compiler now uses an aggregate in `Save_Scan_State`, which enables full coverage checking.

Ada: Minor comment fixes.

Mon, 05 Jan 2026 00:00:00 GMT
The Ada compiler's code now contains minor comment fixes, including typos and rewrites.

Limit outer-loop unswitching by duplicated code size

Mon, 05 Jan 2026 00:00:00 GMT
The compiler avoids excessive code duplication by limiting outer-loop unswitching based on duplicated code size.

Improve Value Range Bound Snapping During Pair Construction

Mon, 05 Jan 2026 00:00:00 GMT
Bounds are now snapped during pair construction to improve value range accuracy.

AArch64 gains new floating-point to integer conversion intrinsics.

Mon, 05 Jan 2026 00:00:00 GMT
GCC now exposes new AArch64 NEON intrinsics for float-to-int conversions, expanding the available rounding and conversion options.

AArch64 gains support for FEAT_FPRCVT floating-point conversion instructions.

Mon, 05 Jan 2026 00:00:00 GMT
GCC now supports ARMv8.6-A's FEAT_FPRCVT extension, enabling efficient floating-point to integer conversions with various rounding modes.

Handle calls to C++ constructors within return statements.

Sun, 04 Jan 2026 00:00:00 GMT
The Ada compiler can now handle C++ constructor calls in the return statement of functions.

Ada: Fix typo in head comment of Sinput specification.

Sat, 03 Jan 2026 00:00:00 GMT
The Ada compiler's Sinput specification now has a corrected typo in its head comment.

AArch64: Add zeroing forms for predicated SVE integer extends

Wed, 31 Dec 2025 00:00:00 GMT
GCC now supports zeroing predication for SVE integer extension instructions on AArch64, improving code generation for SVE2.2 and SME2.2.

Configury: Consolidate CHECK_ATTRIBUTE_VISIBILITY macro.

Tue, 30 Dec 2025 00:00:00 GMT
The CHECK_ATTRIBUTE_VISIBILITY macro is now centralized in visibility.m4 and used by libatomic, libgfortran, libgomp, and libitm.

Ada: Improve machinery for generating predicate checks

Wed, 24 Dec 2025 00:00:00 GMT
This commit improves the code that generates predicate checks in Ada, adding support for incomplete types and factoring out common code.

Enable checks during analysis of expanded dispatching calls.

Tue, 23 Dec 2025 00:00:00 GMT
This commit re-enables run-time checks during the expansion of dispatching calls in Ada.

Ada: Stop propagation of by-constructor indication during composition.

Tue, 23 Dec 2025 00:00:00 GMT
The Ada compiler now correctly propagates the by-constructor indication only for derived tagged types, not during composition.

AArch64 SVE now combines AdvSIMD and SVE vector duplicates.

Mon, 22 Dec 2025 00:00:00 GMT
GCC now combines AdvSIMD and SVE vector duplicates into a single instruction for AArch64, improving code generation.

Ada: Fix spurious range check in class-wide preconditions.

Mon, 22 Dec 2025 00:00:00 GMT
The Ada compiler no longer generates spurious range checks for out-mode scalars in dynamic class-wide preconditions.

AArch64: Implement FIRSTP and LASTP SVE instructions

Wed, 17 Dec 2025 00:00:00 GMT
The Arm Scalable Vector Extension (SVE) now supports FIRSTP and LASTP instructions in streaming mode under SME2.2, with new intrinsics and constant folding opt…

Unify `range_of_address` for Consistent Range Handling

Wed, 17 Dec 2025 00:00:00 GMT
`range_of_address` now behaves consistently with other range analysis routines, enabling post-calculation processing.

Ada: Refactor assignments in constructor prologue.

Tue, 16 Dec 2025 00:00:00 GMT
The Ada compiler now uses a common routine for building component assignments in both constructor prologues and initialization procedures.

`range_of_expr` Handles No Context Without Crashing

Tue, 16 Dec 2025 00:00:00 GMT
Fixes a crash in `range_of_expr` when called without a statement context, ensuring global value ranges are properly returned.

Ada: Add new aspects for CodePeer's taint analysis.

Mon, 15 Dec 2025 00:00:00 GMT
The Ada compiler now accepts, but ignores, taint-related aspects for use by CodePeer, a static analysis tool.

Handle integer constants up front

Mon, 15 Dec 2025 00:00:00 GMT
The compiler now directly returns an integer constant value when `get_maxval_strlen` is passed an integer constant.

Enable POPCNT generation for 32-bit patterns from Hacker's Delight.

Thu, 11 Dec 2025 00:00:00 GMT
This commit enables the generation of the POPCNT instruction for several 32-bit bit counting patterns found in Hacker's Delight.

AArch64: Implement FRINT32/64 SVE instructions

Thu, 11 Dec 2025 00:00:00 GMT
GCC now supports FRINT32X/Z and FRINT64X/Z instructions in SVE2.2 and SME2.2, which round floating-point numbers to 32-bit or 64-bit integers.

Ada: Drop renamings when dropping an unused subprogram.

Fri, 05 Dec 2025 00:00:00 GMT
The Ada compiler ensures that renamings of unused subprograms are also dropped during unnesting, preventing potential issues.

Range Analysis Can Now Mark Statements for Recalculation

Wed, 03 Dec 2025 00:00:00 GMT
The range analysis can now mark statements as stale, forcing recalculation of their value ranges when next used.

Middle-end: Optimize reversed CRC table-based implementation

Fri, 28 Nov 2025 00:00:00 GMT
GCC now generates faster table-based CRC implementations by pre-reversing the lookup table.

Ada: Make __gnat_copy_attribs non-blocking on windows

Wed, 26 Nov 2025 00:00:00 GMT
The Ada runtime's `__gnat_copy_attribs` function now uses non-blocking file attribute fetching on Windows.

Extend runtime GPR files for building shared libraries.

Fri, 14 Nov 2025 00:00:00 GMT
The Ada runtime GPR files now support building shared and static PIC libraries.

AArch64 gains streaming SVE2 bit permutation instruction support.

Tue, 04 Nov 2025 00:00:00 GMT
GCC now supports the AArch64 FEAT_SSVE_BitPerm extension, enabling SVE2 bit permutation instructions in streaming mode.

AArch64 streaming SVE exponential instruction gating receives an update.

Tue, 04 Nov 2025 00:00:00 GMT
GCC's AArch64 support for the streaming SVE FEXPA intrinsic now correctly gates its availability based on hardware support.

C/C++: Enable user-defined stack protection guard symbols.

Sat, 13 Sep 2025 00:00:00 GMT
This change allows users to define the stack protection guard as a global symbol, and merges it if it matches the compiler's internal symbol.

GCC documentation now clarifies integer types as “integral”.

Thu, 29 May 2025 00:00:00 GMT
The GCC documentation now uses “integral” instead of the potentially confusing “fixed-point” when referring to integer types.

libstdc++: Reduce indirection in function_ref where possible.

Thu, 15 May 2025 00:00:00 GMT
The `std::function_ref` in libstdc++ avoids double indirection by optimizing construction and assignment.

Use collective entity kinds for access-to-subprogram types

Fri, 25 Apr 2025 00:00:00 GMT
The Ada front end now consistently uses more general entity kinds for access-to-subprogram types, standardizing internal representations without altering progr…

Reuse Boolean_Literals in rewriting of accessibility checks

Tue, 25 Mar 2025 00:00:00 GMT
The Ada compiler now reuses existing Boolean literal entities when rewriting accessibility checks, improving code efficiency.

Remove redundant guard against empty list of declarations

Thu, 20 Mar 2025 00:00:00 GMT
The Ada compiler's `Scan_Declarations` function was simplified by removing an unnecessary check for empty declaration lists.

Corrects unbalanced parentheses in an Ada front end comment

Thu, 26 Dec 2024 00:00:00 GMT
A commit in the Ada front end fixes a minor formatting error by correcting unbalanced parentheses in a comment within `sem_ch9.adb`.

Libgccjit allows casts between integers and pointers

Tue, 10 Dec 2024 00:00:00 GMT
The libgccjit library now permits explicit casts between integer and pointer types, increasing flexibility for JIT-compiled C code.

Simplify code in `Rep_Item_Too_Late` with a membership test

Mon, 24 Jun 2024 00:00:00 GMT
The Ada compiler function `Rep_Item_Too_Late` was simplified using a membership test, improving readability without changing its functionality.

Tune layout in membership test

Fri, 21 Jun 2024 00:00:00 GMT
Whitespace in the Ada compiler's `freeze.adb` and `sem_ch13.adb` was adjusted for better code formatting.

Darwin test suite now XFAILs -g3 tests with dyld on current OS versions.

Sun, 05 May 2024 00:00:00 GMT
Tests using -g3 debugging on Darwin are now marked as expected failures for current OS versions due to incompatibility with dyld's static linker.

libcpp/init: remove unnecessary `struct` keyword

Tue, 02 Apr 2024 00:00:00 GMT
libcpp/init: remove unnecessary `struct` keyword

libcpp/mkdeps: fix indentation

Tue, 02 Apr 2024 00:00:00 GMT
libcpp/mkdeps: fix indentation

libstdc++: Update tzdata to 2026b

Fri, 12 Jan 2024 00:00:00 GMT
Updates the libstdc++ timezone database to the 2026b release.

AArch64 assembler bug workaround becomes configurable in GCC.

Fri, 20 Oct 2023 00:00:00 GMT
GCC for AArch64 now allows configuring a workaround for an assembler bug, resolving conflicting issues across different assemblers.