diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86TargetTransformInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86TargetTransformInfo.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp index 843d6cf839d..3dc59aeb263 100644 --- a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp +++ b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp @@ -3301,8 +3301,9 @@ X86TTIImpl::enableMemCmpExpansion(bool OptSize, bool IsZeroCmp) const { // version is not as fast for three way compare (see #33329). // TODO: enable AVX512 when the DAG is ready. // if (ST->hasAVX512()) Options.LoadSizes.push_back(64); - if (ST->hasAVX2()) Options.LoadSizes.push_back(32); - if (ST->hasSSE2()) Options.LoadSizes.push_back(16); + const unsigned PreferredWidth = ST->getPreferVectorWidth(); + if (PreferredWidth >= 256 && ST->hasAVX2()) Options.LoadSizes.push_back(32); + if (PreferredWidth >= 128 && ST->hasSSE2()) Options.LoadSizes.push_back(16); // All GPR and vector loads can be unaligned. SIMD compare requires integer // vectors (SSE2/AVX2). Options.AllowOverlappingLoads = true; |
