[X86][SSE] Use scaleShuffleMask helper. NFCI.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274988 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index b8250c2..4e3a85a 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -24879,17 +24879,8 @@ static bool matchPermuteVectorShuffle(MVT SrcVT, ArrayRef<int> Mask,
 
   // Narrow the repeated mask for 32-bit element permutes.
   SmallVector<int, 4> WordMask = RepeatedMask;
-  if (MaskScalarSizeInBits == 64) {
-    WordMask.clear();
-    for (int M : RepeatedMask) {
-      if (M == SM_SentinelUndef) {
-        WordMask.append(2, SM_SentinelUndef);
-        continue;
-      }
-      WordMask.push_back((M * 2) + 0);
-      WordMask.push_back((M * 2) + 1);
-    }
-  }
+  if (MaskScalarSizeInBits == 64)
+    scaleShuffleMask(2, RepeatedMask, WordMask);
 
   Shuffle = (FloatDomain ? X86ISD::VPERMILPI : X86ISD::PSHUFD);
   ShuffleVT = (FloatDomain ? MVT::f32 : MVT::i32);