[llvm] r335578 - [X86] Don't use getScalarShiftAmountTy to get the immediate type for target specific VSHLDQ/VSRLDQ nodes.

[Craig Topper via llvm-commits]

Author: ctopper
Date: Mon Jun 25 21:53:42 2018
New Revision: 335578

URL: http://llvm.org/viewvc/llvm-project?rev=335578&view=rev
Log:
[X86] Don't use getScalarShiftAmountTy to get the immediate type for target specific VSHLDQ/VSRLDQ nodes.

These opcodes have a fixed type of i8 for their immediate and shouldn't have anything to do with the scalar shift amount used by target independent shift nodes.

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=335578&r1=335577&r2=335578&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Mon Jun 25 21:53:42 2018
@@ -6655,9 +6655,8 @@ static SDValue getVShift(bool isLeft, EV
   MVT ShVT = MVT::v16i8;
   unsigned Opc = isLeft ? X86ISD::VSHLDQ : X86ISD::VSRLDQ;
   SrcOp = DAG.getBitcast(ShVT, SrcOp);
-  MVT ScalarShiftTy = TLI.getScalarShiftAmountTy(DAG.getDataLayout(), VT);
   assert(NumBits % 8 == 0 && "Only support byte sized shifts");
-  SDValue ShiftVal = DAG.getConstant(NumBits/8, dl, ScalarShiftTy);
+  SDValue ShiftVal = DAG.getConstant(NumBits/8, dl, MVT::i8);
   return DAG.getBitcast(VT, DAG.getNode(Opc, dl, ShVT, SrcOp, ShiftVal));
 }
 
@@ -10765,9 +10764,7 @@ static SDValue lowerVectorShuffleAsEleme
       V2 = DAG.getBitcast(MVT::v16i8, V2);
       V2 = DAG.getNode(
           X86ISD::VSHLDQ, DL, MVT::v16i8, V2,
-          DAG.getConstant(V2Index * EltVT.getSizeInBits() / 8, DL,
-                          DAG.getTargetLoweringInfo().getScalarShiftAmountTy(
-                              DAG.getDataLayout(), VT)));
+          DAG.getConstant(V2Index * EltVT.getSizeInBits() / 8, DL, MVT::i8));
       V2 = DAG.getBitcast(VT, V2);
     }
   }