diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86Subtarget.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86Subtarget.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86Subtarget.cpp b/llvm/lib/Target/X86/X86Subtarget.cpp index db5792a2b28..c2f60be3219 100644 --- a/llvm/lib/Target/X86/X86Subtarget.cpp +++ b/llvm/lib/Target/X86/X86Subtarget.cpp @@ -255,6 +255,10 @@ void X86Subtarget::AutoDetectSubtargetFeatures() { HasX86_64 = true; ToggleFeature(X86::Feature64Bit); } + if ((ECX >> 5) & 0x1) { + HasLZCNT = true; + ToggleFeature(X86::FeatureLZCNT); + } if (IsAMD && ((ECX >> 6) & 0x1)) { HasSSE4A = true; ToggleFeature(X86::FeatureSSE4A); @@ -285,6 +289,7 @@ X86Subtarget::X86Subtarget(const std::string &TT, const std::string &CPU, , HasMOVBE(false) , HasRDRAND(false) , HasF16C(false) + , HasLZCNT(false) , IsBTMemSlow(false) , IsUAMemFast(false) , HasVectorUAMem(false) |
