From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Sun, 19 Feb 2017 21:40:51 +0000 (+0000)
Subject: [X86] Use peekThroughOneUseBitcasts helper. NFCI.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f042c820ef6b1075ab595d5b6b83a8fa05eb58bc;p=llvm

[X86] Use peekThroughOneUseBitcasts helper. NFCI.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@295618 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 44e3f18c401..7d16dd9b623 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -28433,18 +28433,13 @@ static SDValue XFormVExtractWithShuffleIntoLoad(SDNode *N, SelectionDAG &DAG,
 
   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();