diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 925796cae7a..4c80b86d449 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -25593,6 +25593,11 @@ bool X86TargetLowering::isVectorShiftByScalarCheap(Type *Ty) const { if (Bits == 8) return false; + // XOP has v16i8/v8i16/v4i32/v2i64 variable vector shifts. + if (Subtarget.hasXOP() && Ty->getPrimitiveSizeInBits() == 128 && + (Bits == 8 || Bits == 16 || Bits == 32 || Bits == 64)) + return false; + // AVX2 has vpsllv[dq] instructions (and other shifts) that make variable // shifts just as cheap as scalar ones. if (Subtarget.hasAVX2() && (Bits == 32 || Bits == 64)) |
