Landing: 04aefdc47fd6
Project / Subsystem
gcc / simplify-rtx
Date
2026-10-02
Author
Tamar Christina
Commit
04aefdc47fd6baeff572f5087d6c30f5d7c2a575
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- simplify-rtx
- patch_id
- —
- commit_hash
- 04aefdc47fd6baeff572f5087d6c30f5d7c2a575
- source_type
- github
- headline
- simplify-rtx: Avoid -Wuninitialized false positive
- tldr
- Fixes a false positive -Wuninitialized warning during profiled bootstraps by improving analysis of conditional initializations.
- author
- Tamar Christina
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • compiler
- • warning
- • bootstrap
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-10-02T00:00:00.000Z
This commit resolves a false positive -Wuninitialized warning that occurred during profiled bootstraps in GCC’s simplify-rtx pass. The warning stemmed from the compiler’s analyzer failing to recognize that a variable foo would be initialized if a specific condition (is_a <.., &foo>) passed. The fix rewrites the check to avoid an out-parameter, thus eliminating the spurious warning.