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| author | Richard Biener <rguenther@suse.de> | 2025-05-14 16:36:29 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2025-06-06 09:43:05 +0200 |
| commit | e93f02828faf7dc0df6a4d67b1b6b2a30bd713cb (patch) | |
| tree | 542d2becdbf19340d38b37c49cbd012a4207e32a /gcc/tree-ssa-phiopt.cc | |
| parent | 63465629ea118d27e59f3d97a92db1461c8b591e (diff) | |
| download | gcc-e93f02828faf7dc0df6a4d67b1b6b2a30bd713cb.zip gcc-e93f02828faf7dc0df6a4d67b1b6b2a30bd713cb.tar.gz gcc-e93f02828faf7dc0df6a4d67b1b6b2a30bd713cb.tar.bz2 | |
Fix regression from x86 multi-epilogue tuning
With the avx512_two_epilogues tuning enabled for zen4 and zen5
the gcc.target/i386/vect-epilogues-5.c testcase below regresses
and ends up using AVX2 sized vectors for the masked epilogue
rather than AVX512 sized vectors. The following patch rectifies
this and adds coverage for the intended behavior.
* config/i386/i386.cc (ix86_vector_costs::finish_cost):
Do not suggest a first epilogue mode for AVX512 sized
main loops with X86_TUNE_AVX512_TWO_EPILOGUES as that
interferes with using a masked epilogue.
* gcc.target/i386/vect-epilogues-1.c: New testcase.
* gcc.target/i386/vect-epilogues-2.c: Likewise.
* gcc.target/i386/vect-epilogues-3.c: Likewise.
* gcc.target/i386/vect-epilogues-4.c: Likewise.
* gcc.target/i386/vect-epilogues-5.c: Likewise.
(cherry picked from commit 75c7f90bfe6fa8e6c1a70b784e98a3412861646d)
Diffstat (limited to 'gcc/tree-ssa-phiopt.cc')
0 files changed, 0 insertions, 0 deletions