[X86] Enable EVEX512 when host CPU has AVX512 #90479
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This is used when -march=native is not a known CPU to LLVM old version.
You can test this locally with the following command:git-clang-format --diff 8d5386669ed63548daf1bee415596582d6d78d7d 9e84562bbea4d733199bef8d760c8e7a02bdb941 -- llvm/lib/TargetParser/Host.cppView the diff from clang-format here.diff --git a/llvm/lib/TargetParser/Host.cpp b/llvm/lib/TargetParser/Host.cpp
index e911d15498..c71adadbb7 100644
--- a/llvm/lib/TargetParser/Host.cpp
+++ b/llvm/lib/TargetParser/Host.cpp
@@ -1801,7 +1801,7 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
Features["rtm"] = HasLeaf7 && ((EBX >> 11) & 1);
// AVX512 is only supported if the OS supports the context save for it.
Features["avx512f"] = HasLeaf7 && ((EBX >> 16) & 1) && HasAVX512Save;
- Features["evex512"] = Features["avx512f"];
+ Features["evex512"] = Features["avx512f"];
Features["avx512dq"] = HasLeaf7 && ((EBX >> 17) & 1) && HasAVX512Save;
Features["rdseed"] = HasLeaf7 && ((EBX >> 18) & 1);
Features["adx"] = HasLeaf7 && ((EBX >> 19) & 1);
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cherry-pick b329179 |
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/cherry-pick b329179 |
llvmbot
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Apr 30, 2024
This is used when -march=native run on an unknown CPU to old version of LLVM. (cherry picked from commit b329179)
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/pull-request #90545 |
tstellar
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to llvmbot/llvm-project
that referenced
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May 1, 2024
This is used when -march=native run on an unknown CPU to old version of LLVM. (cherry picked from commit b329179)
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This is used when -march=native run on an unknown CPU to old version of LLVM.