Landing: d38b7b34f4dc
Project / Subsystem
gcc / cfgexpand
Date
2026-08-26
Author
Oleg Tolmatcev
Commit
d38b7b34f4dc69f896e1fbd984b859365f3dd282
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- cfgexpand
- patch_id
- —
- commit_hash
- d38b7b34f4dc69f896e1fbd984b859365f3dd282
- source_type
- github
- headline
- Cfgexpand: Consistently align stack variables.
- tldr
- Ensures consistent stack alignment calculation for local variables to fix alignment assertion failures.
- author
- Oleg Tolmatcev
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • stack
- • alignment
- • compiler
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-08-26T00:00:00.000Z
This fix in the cfgexpand pass ensures that stack-allocated local variables are consistently aligned. Previously, defer_stack_allocation and expand_one_stack_var_1 used different methods to calculate alignment, causing variables deemed small enough by one function to trigger a large-alignment assertion in the other. The change standardizes alignment computation using align_local_variable.