Landing: 081959973e38
Project / Subsystem
gcc / gcc
Date
2026-07-10
Author
Roger Sayle
Commit
081959973e38fde06077cbfa70e036e4f018489c
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc
- patch_id
- —
- commit_hash
- 081959973e38fde06077cbfa70e036e4f018489c
- source_type
- github
- headline
- PR tree-optimization/57371: Improved comparison of integers to FP constants.
- tldr
- Enhances optimization for integer-to-floating-point constant comparisons, considering trapping behavior and rounding.
- author
- Roger Sayle
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • optimization
- • floating-point
- • integer conversion
- • bugfix
- discussion_id_link
- github:gcc-mirror/gcc#57371
- bugzilla_pr
- —
- date
- 2026-07-10T00:00:00.000Z
This patch refines the tree-level optimization for comparing integers to floating-point constants, addressing PR57371. It now considers the flag_trapping_math to correctly preserve floating-point exception behavior. The core improvement involves determining if a comparison is unambiguous enough to be converted to a safer integer comparison, carefully handling potential rounding issues inherent in floating-point conversions.