[llvm] r277279 - [X86] Use peekThroughOneUseBitcasts helper function

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Sat Jul 30 15:51:26 2016
New Revision: 277279

URL: http://llvm.org/viewvc/llvm-project?rev=277279&view=rev
Log:
[X86] Use peekThroughOneUseBitcasts helper function

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=277279&r1=277278&r2=277279&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Sat Jul 30 15:51:26 2016
@@ -25322,8 +25322,7 @@ static bool combineX86ShufflesRecursivel
     return false;
 
   // Directly rip through bitcasts to find the underlying operand.
-  while (Op.getOpcode() == ISD::BITCAST && Op.getOperand(0).hasOneUse())
-    Op = Op.getOperand(0);
+  Op = peekThroughOneUseBitcasts(Op);
 
   MVT VT = Op.getSimpleValueType();
   if (!VT.isVector())
@@ -25923,9 +25922,7 @@ static SDValue combineTargetShuffle(SDVa
          V.getOpcode() == X86ISD::PSHUFHW) &&
         V.getOpcode() != N.getOpcode() &&
         V.hasOneUse()) {
-      SDValue D = V.getOperand(0);
-      while (D.getOpcode() == ISD::BITCAST && D.hasOneUse())
-        D = D.getOperand(0);
+      SDValue D = peekThroughOneUseBitcasts(V.getOperand(0));
       if (D.getOpcode() == X86ISD::PSHUFD && D.hasOneUse()) {
         SmallVector<int, 4> VMask = getPSHUFShuffleMask(V);
         SmallVector<int, 4> DMask = getPSHUFShuffleMask(D);