Add VPERMQ/VPERMPD to the list of target specific shuffles that can be looked through for DAG combine purposes.

llvm-svn: 156266

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 24d95a9977f..e282617e3e0 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -2914,6 +2914,7 @@ static bool isTargetShuffle(unsigned Opcode) {
   case X86ISD::UNPCKH:
   case X86ISD::VPERMILP:
   case X86ISD::VPERM2X128:
+  case X86ISD::VPERMI:
     return true;
   }
 }
@@ -4455,6 +4456,11 @@ static bool getTargetShuffleMask(SDNode *N, EVT VT,
     DecodePSHUFLWMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
     IsUnary = true;
     break;
+  case X86ISD::VPERMI:
+    ImmN = N->getOperand(N->getNumOperands()-1);
+    DecodeVPERMMask(cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
+    IsUnary = true;
+    break;
   case X86ISD::MOVSS:
   case X86ISD::MOVSD: {
     // The index 0 always comes from the first element of the second source,