Added support for _mm_move_ss and _mm_move_sd.
llvm-svn: 27575
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 3daad28..725dd16 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -1684,6 +1684,26 @@
return true;
}
+/// isMOVSMask - Return true if the specified VECTOR_SHUFFLE operand
+/// specifies a shuffle of elements that is suitable for input to MOVS{S|D}.
+bool X86::isMOVSMask(SDNode *N) {
+ assert(N->getOpcode() == ISD::BUILD_VECTOR);
+
+ unsigned NumElems = N->getNumOperands();
+ if (NumElems != 2 && NumElems != 4)
+ return false;
+
+ if (!isUndefOrEqual(N->getOperand(0), NumElems))
+ return false;
+
+ for (unsigned i = 1; i < NumElems; ++i) {
+ SDOperand Arg = N->getOperand(i);
+ if (!isUndefOrEqual(Arg, i))
+ return false;
+ }
+
+ return true;
+}
/// isSplatMask - Return true if the specified VECTOR_SHUFFLE operand specifies
/// a splat of a single element.
@@ -2680,6 +2700,10 @@
if (NumElems == 2)
return Op;
+ if (X86::isMOVSMask(PermMask.Val))
+ // Leave the VECTOR_SHUFFLE alone. It matches MOVS{S|D}.
+ return Op;
+
if (X86::isUNPCKLMask(PermMask.Val) ||
X86::isUNPCKL_v_undef_Mask(PermMask.Val) ||
X86::isUNPCKHMask(PermMask.Val))
@@ -3106,10 +3130,11 @@
// Only do shuffles on 128-bit vector types for now.
if (MVT::getSizeInBits(VT) == 64) return false;
return (Mask.Val->getNumOperands() == 2 ||
- X86::isSplatMask(Mask.Val) ||
+ X86::isSplatMask(Mask.Val) ||
+ X86::isMOVSMask(Mask.Val) ||
X86::isPSHUFDMask(Mask.Val) ||
isPSHUFHW_PSHUFLWMask(Mask.Val) ||
- X86::isSHUFPMask(Mask.Val) ||
+ X86::isSHUFPMask(Mask.Val) ||
X86::isUNPCKLMask(Mask.Val) ||
X86::isUNPCKL_v_undef_Mask(Mask.Val) ||
X86::isUNPCKHMask(Mask.Val));