From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Sat, 30 Jul 2016 20:51:26 +0000 (+0000)
Subject: [X86] Use peekThroughOneUseBitcasts helper function
X-Git-Tag: llvmorg-4.0.0-rc1~13736
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8bbd3650a6d24e878b03d1a22d78bead005e5ede;p=platform%2Fupstream%2Fllvm.git

[X86] Use peekThroughOneUseBitcasts helper function

llvm-svn: 277279
---

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index dde5a4f..098b982 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -25322,8 +25322,7 @@ static bool combineX86ShufflesRecursively(SDValue Op, SDValue Root,
     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(SDValue N, SelectionDAG &DAG,
          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);