[X86] Simplify a shuffle mask copy. NFC

llvm-svn: 277947

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index e709455..53d06ca 100644 (file)
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -26075,10 +26075,8 @@ static SDValue combineShuffleToAddSub(SDNode *N, const X86Subtarget &Subtarget,
   if (N->getOpcode() != ISD::VECTOR_SHUFFLE)
     return SDValue();
 
-  auto *SVN = cast<ShuffleVectorSDNode>(N);
-  SmallVector<int, 8> Mask;
-  for (int M : SVN->getMask())
-    Mask.push_back(M);
+  ArrayRef<int> OrigMask = cast<ShuffleVectorSDNode>(N)->getMask();
+  SmallVector<int, 8> Mask(OrigMask.begin(), OrigMask.end());
 
   SDValue V1 = N->getOperand(0);
   SDValue V2 = N->getOperand(1);