Merge commit 87f3407856e6 from llvm-project (by Phoebe Wang):
[X86][Driver] Do not add `-evex512` for `-march=native` when the target doesn't support AVX512 (#91694)
This prevents problems with ports that fail to build with
CPUTYPE=native, if the native CPU supports AVX512F, resulting in errors
like:
/wrkdirs/usr/ports/archivers/libdeflate/work/libdeflate-1.20/lib/x86/adler32_template.h:197:21: error: always_inline function '_mm512_set1_epi8' requires target feature 'evex512', but would be inlined into function 'adler32_x86_avx512_vl512_vnni' that is compiled without support for 'evex512'
197 | const vec_t ones = VSET1_8(1);
| ^
/wrkdirs/usr/ports/archivers/libdeflate/work/libdeflate-1.20/lib/x86/adler32_template.h:116:23: note: expanded from macro 'VSET1_8'
116 | # define VSET1_8(a) _mm512_set1_epi8(a)
| ^
/wrkdirs/usr/ports/archivers/libdeflate/work/libdeflate-1.20/lib/x86/adler32_template.h:197:21: error: AVX vector return of type '__m512i' (vector of 8 'long long' values) without 'evex512' enabled changes the ABI
/wrkdirs/usr/ports/archivers/libdeflate/work/libdeflate-1.20/lib/x86/adler32_template.h:116:23: note: expanded from macro 'VSET1_8'
116 | # define VSET1_8(a) _mm512_set1_epi8(a)
| ^Ports known to be affected are: archivers/libdeflate, devel/highway,
www/node20, and lang/rust.
(For rust itself there is also a similar issue reported at
https://github.com/rust-lang/rust/pull/121088).
PR: 276104
Reported by: netchild
MFC after: 3 days