Landing: 8404a2538d64
Project / Subsystem
gcc / risc-v
Date
2026-01-07
Author
Monk Chiang
Commit
8404a2538d64ea6c4abb59d9db59b19cb265af79
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- risc-v
- patch_id
- —
- commit_hash
- 8404a2538d64ea6c4abb59d9db59b19cb265af79
- source_type
- github
- headline
- RISC-V: Use long jumps when crossing section boundaries.
- tldr
- 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.
- author
- Monk Chiang
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • risc-v
- • code generation
- • optimization
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-01-07T00:00:00.000Z
This patch addresses an issue in the RISC-V backend of GCC where jumps between different code sections (e.g., hot code in .text and cold code in .text.unlikely) could exceed the range of the JAL instruction when using -freorder-blocks-and-partition. To fix this, GCC now checks for cross-section jumps and uses the longer AUIPC+JALR instruction sequence (8 bytes) instead of the shorter JAL instruction (4 bytes) when necessary, ensuring that jumps can reach targets beyond the JAL instruction’s ±1MB range.