Landing: 6cd7436eb3d8

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Project / Subsystem

gcc / x86

Date

2026-08-20

Author

H.J. Lu

Commit

6cd7436eb3d83e7d9a4c767cdb2643919ad9c3c0

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: x86
patch_id: —
commit_hash: 6cd7436eb3d83e7d9a4c767cdb2643919ad9c3c0
source_type: github
headline: x86: Disable AVX512F in FMA4 tests
tldr: FMA4 tests now compile with AVX512F disabled to prevent failures.
author: H.J. Lu
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • x86
• fma4
• avx512f
• testsuite
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/6cd7436eb3d83e7d9a4c767cdb2643919ad9c3c0
date: 2026-08-20T00:00:00.000Z

FMA4 tests were failing when AVX512F was enabled by default, due to conflicts in generated instructions. This commit adds the -mno-avx512f flag to the test cases’ compilation options, resolving the failures by ensuring AVX512F instructions are not used.