[llvm] r310786 - [X86] Early out of combineInsertSubvector for mask vectors.

[Craig Topper via llvm-commits]

Author: ctopper
Date: Sat Aug 12 15:33:58 2017
New Revision: 310786

URL: http://llvm.org/viewvc/llvm-project?rev=310786&view=rev
Log:
[X86] Early out of combineInsertSubvector for mask vectors.

The combines here shouldn't be done for mask vectors, but it wasn't clear anything was preventing that.

Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=310786&r1=310785&r2=310786&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Sat Aug 12 15:33:58 2017
@@ -35504,13 +35504,18 @@ static SDValue combineInsertSubvector(SD
   if (DCI.isBeforeLegalizeOps())
     return SDValue();
 
+  MVT OpVT = N->getSimpleValueType(0);
+
+  // Early out for mask vectors.
+  if (OpVT.getVectorElementType() == MVT::i1)
+    return SDValue();
+
   SDLoc dl(N);
   SDValue Vec = N->getOperand(0);
   SDValue SubVec = N->getOperand(1);
   SDValue Idx = N->getOperand(2);
 
   unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
-  MVT OpVT = N->getSimpleValueType(0);
   MVT SubVecVT = SubVec.getSimpleValueType();
 
   // If this is an insert of an extract, combine to a shuffle. Don't do this