Use MOVHLPS node instead of matching using movhlps and movhlps_undef pattern fragments
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112644 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index d413e6c..1b18eb6 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -2585,6 +2585,7 @@
case X86ISD::SHUFPD:
case X86ISD::SHUFPS:
case X86ISD::MOVLHPS:
+ case X86ISD::MOVHLPS:
case X86ISD::MOVSS:
case X86ISD::MOVSD:
case X86ISD::PUNPCKLDQ:
@@ -2624,6 +2625,7 @@
default: llvm_unreachable("Unknown x86 shuffle node");
case X86ISD::MOVLHPS:
case X86ISD::MOVLHPD:
+ case X86ISD::MOVHLPS:
case X86ISD::MOVSS:
case X86ISD::MOVSD:
case X86ISD::PUNPCKLDQ:
@@ -5021,6 +5023,22 @@
return getTargetShuffleNode(X86ISD::MOVLHPS, dl, VT, V1, V2, DAG);
}
+static
+SDValue getMOVHighToLow(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG) {
+ SDValue V1 = Op.getOperand(0);
+ SDValue V2 = Op.getOperand(1);
+ EVT VT = Op.getValueType();
+
+ assert((VT == MVT::v4i32 || VT == MVT::v4f32) &&
+ "unsupported shuffle type");
+
+ if (V2.getOpcode() == ISD::UNDEF)
+ V2 = V1;
+
+ // v4i32 or v4f32
+ return getTargetShuffleNode(X86ISD::MOVHLPS, dl, VT, V1, V2, DAG);
+}
+
SDValue
X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
@@ -5131,6 +5149,9 @@
if (X86::isMOVLHPSMask(SVOp) && !X86::isUNPCKLMask(SVOp))
return getMOVLowToHigh(Op, dl, DAG, HasSSE2);
+ if (X86::isMOVHLPSMask(SVOp))
+ return getMOVHighToLow(Op, dl, DAG);
+
if (X86::isMOVSHDUPMask(SVOp) ||
X86::isMOVSLDUPMask(SVOp) ||
X86::isMOVHLPSMask(SVOp) ||