[X86][SSE] Combine shuffles to MOVSS/MOVSD whatever the domain.

We already do the same thing in shuffle lowering; but don't do it if we have SSE41 (PBLEND) instead.

llvm-svn: 289937

1 files changed, 9 insertions, 9 deletions

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 2b496b04f01..1de40c12562 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -26072,17 +26072,17 @@ static bool matchBinaryVectorShuffle(MVT MaskVT, ArrayRef<int> Mask,
       ShuffleVT = MVT::v4f32;
       return true;
     }
-    if (isTargetShuffleEquivalent(Mask, {0, 3}) && FloatDomain) {
-      if (Subtarget.hasSSE2()) {
-        std::swap(V1, V2);
-        Shuffle = X86ISD::MOVSD;
-        ShuffleVT = MVT::v2f64;
-        return true;
-      }
+    if (isTargetShuffleEquivalent(Mask, {0, 3}) && Subtarget.hasSSE2() &&
+        (FloatDomain || !Subtarget.hasSSE41())) {
+      std::swap(V1, V2);
+      Shuffle = X86ISD::MOVSD;
+      ShuffleVT = MaskVT;
+      return true;
     }
-    if (isTargetShuffleEquivalent(Mask, {4, 1, 2, 3}) && FloatDomain) {
+    if (isTargetShuffleEquivalent(Mask, {4, 1, 2, 3}) &&
+        (FloatDomain || !Subtarget.hasSSE41())) {
       Shuffle = X86ISD::MOVSS;
-      ShuffleVT = MVT::v4f32;
+      ShuffleVT = MaskVT;
       return true;
     }
   }