Move condition out to prepare for more matching

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112805 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index e32df4dc5c5e90f6d6809b86ab024df59a30e067..a5e59edac8d519ccdef4efa41c7bed69c73b3dcb 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -5181,6 +5181,11 @@ X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
     }
   }
 
+  if (OptForSize) { // NOTE: isPSHUFDMask can also match this mask...
+    if (HasSSE2 && X86::isUNPCKL_v_undef_Mask(SVOp) && VT == MVT::v4i32)
+      return getTargetShuffleNode(X86ISD::PUNPCKLDQ, dl, VT, V1, V1, DAG);
+  }
+
   if (X86::isPSHUFDMask(SVOp)) {
     // The actual implementation will match the mask in the if above and then
     // during isel it can match several different instructions, not only pshufd
@@ -5188,10 +5193,6 @@ X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
     if (X86::isMOVDDUPMask(SVOp) && ((VT == MVT::v4f32 || VT == MVT::v2i64)))
         return getTargetShuffleNode(X86ISD::MOVLHPS, dl, VT, V1, V1, DAG);
 
-    if (OptForSize && HasSSE2 && X86::isUNPCKL_v_undef_Mask(SVOp) &&
-        VT == MVT::v4i32)
-      return getTargetShuffleNode(X86ISD::PUNPCKLDQ, dl, VT, V1, V1, DAG);
-
     unsigned TargetMask = X86::getShuffleSHUFImmediate(SVOp);
 
     if (HasSSE2 && (VT == MVT::v4f32 || VT == MVT::v4i32))