Landing: 5d7c74258d3a

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Project / Subsystem

gcc / gcc/tree-optimization

Date

2026-07-03

Author

Philipp Tomsich

Commit

5d7c74258d3a4b95cd5022acd5fa51381d922a40

Source

github

Perf win

No

Breaking

No

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All attributes

project: gcc
subsystem: gcc/tree-optimization
patch_id: —
commit_hash: 5d7c74258d3a4b95cd5022acd5fa51381d922a40
source_type: github
headline: Use target-independent types for carry overflow checks
tldr: Ensures target-independent carry overflow checks by using predefined width types.
author: Philipp Tomsich
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • gcc
• compiler
• optimization
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/5d7c74258d3a4b95cd5022acd5fa51381d922a40
date: 2026-07-03T00:00:00.000Z

The uns_carry() helper function in GCC’s tree-optimization passes previously used fixed-width types (unsigned int and unsigned long) for its narrow and wide type comparisons. This commit modifies the helper to use __UINT32_TYPE__ and __UINT64_TYPE__ instead. This change makes the comparison target-independent, resolving issues on ILP32 (32-bit) targets where unsigned long might not be wider than unsigned int, ensuring the test suite accurately reflects carry behavior across different architectures.