[llvm] r295618 - [X86] Use peekThroughOneUseBitcasts helper. NFCI.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Sun Feb 19 15:40:51 2017
New Revision: 295618

URL: http://llvm.org/viewvc/llvm-project?rev=295618&view=rev
Log:
[X86] Use peekThroughOneUseBitcasts helper. NFCI.

Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=295618&r1=295617&r2=295618&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Sun Feb 19 15:40:51 2017
@@ -28433,18 +28433,13 @@ static SDValue XFormVExtractWithShuffleI
 
   EVT OriginalVT = InVec.getValueType();
 
-  if (InVec.getOpcode() == ISD::BITCAST) {
-    // Don't duplicate a load with other uses.
-    if (!InVec.hasOneUse())
-      return SDValue();
-    EVT BCVT = InVec.getOperand(0).getValueType();
-    if (!BCVT.isVector() ||
-        BCVT.getVectorNumElements() != OriginalVT.getVectorNumElements())
-      return SDValue();
-    InVec = InVec.getOperand(0);
-  }
+  // Peek through bitcasts, don't duplicate a load with other uses.
+  InVec = peekThroughOneUseBitcasts(InVec);
 
   EVT CurrentVT = InVec.getValueType();
+  if (!CurrentVT.isVector() ||
+      CurrentVT.getVectorNumElements() != OriginalVT.getVectorNumElements())
+    return SDValue();
 
   if (!isTargetShuffle(InVec.getOpcode()))
     return SDValue();