- Supposely movlhps is faster / better than unpcklpd.
- Don't forget pshufd is only available with sse2.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26956 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index d26d787..bea938a 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -2242,7 +2242,7 @@
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1,
DAG.getNode(ISD::UNDEF, V1.getValueType()),
PermMask);
- } else if (X86::isPSHUFDMask(PermMask.Val)) {
+ } else if (Subtarget->hasSSE2() && X86::isPSHUFDMask(PermMask.Val)) {
if (V2.getOpcode() == ISD::UNDEF)
// Leave the VECTOR_SHUFFLE alone. It matches PSHUFD.
return SDOperand();
@@ -2375,5 +2375,6 @@
/// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
/// are assumed to be legal.
bool X86TargetLowering::isShuffleMaskLegal(SDOperand Mask) const {
- return (X86::isSplatMask(Mask.Val) || X86::isPSHUFDMask(Mask.Val));
+ return (X86::isSplatMask(Mask.Val) ||
+ (Subtarget->hasSSE2() && X86::isPSHUFDMask(Mask.Val)));
}