Landing: 04b71bc24bc7
Project / Subsystem
gcc / i386
Date
2026-08-18
Author
H.J. Lu
Commit
04b71bc24bc7e1da1bb2ea347301056e1ddf3673
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- i386
- patch_id
- —
- commit_hash
- 04b71bc24bc7e1da1bb2ea347301056e1ddf3673
- source_type
- github
- headline
- zero-scratch-regs-[29|30].c: Disable TARGET_USE_FFREEP to fix testsuite failures
- tldr
- Disables an x87 FPU optimization in i386 test cases to prevent assembler scan failures.
- author
- H.J. Lu
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • i386
- • x87
- • testsuite
- • optimization
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-08-18T00:00:00.000Z
Test cases zero-scratch-regs-29.c and zero-scratch-regs-30.c were failing because the TARGET_USE_FFREEP option, which enables the ffreep instruction as a replacement for fstp, was enabled by default. This led to assembler scan failures as the tests expected fstp. This commit modifies the test cases to disable this optimization using -mtune-ctrl=^use_ffreep, resolving the failures.