[llvm] r335617 - [DAGCombiner] Pull out VT bitwidth in visitSDIV. NFCI.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Tue Jun 26 08:39:16 2018
New Revision: 335617

URL: http://llvm.org/viewvc/llvm-project?rev=335617&view=rev
Log:
[DAGCombiner] Pull out VT bitwidth in visitSDIV. NFCI.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp?rev=335617&r1=335616&r2=335617&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Tue Jun 26 08:39:16 2018
@@ -3004,6 +3004,7 @@ SDValue DAGCombiner::visitSDIV(SDNode *N
   SDValue N0 = N->getOperand(0);
   SDValue N1 = N->getOperand(1);
   EVT VT = N->getValueType(0);
+  unsigned BitWidth = VT.getScalarSizeInBits();
 
   // fold vector ops
   if (VT.isVector())
@@ -3072,16 +3073,15 @@ SDValue DAGCombiner::visitSDIV(SDNode *N
 
     // Create constants that are functions of the shift amount value.
     EVT ShiftAmtTy = getShiftAmountTy(N0.getValueType());
-    SDValue Bits = DAG.getConstant(VT.getScalarSizeInBits(), DL, ShiftAmtTy);
+    SDValue Bits = DAG.getConstant(BitWidth, DL, ShiftAmtTy);
     SDValue C1 = DAG.getNode(ISD::CTTZ, DL, VT, N1);
     C1 = DAG.getZExtOrTrunc(C1, DL, ShiftAmtTy);
     SDValue Inexact = DAG.getNode(ISD::SUB, DL, ShiftAmtTy, Bits, C1);
     if (!isConstantOrConstantVector(Inexact))
       return SDValue();
     // Splat the sign bit into the register
-    SDValue Sign = DAG.getNode(
-        ISD::SRA, DL, VT, N0,
-        DAG.getConstant(VT.getScalarSizeInBits() - 1, DL, ShiftAmtTy));
+    SDValue Sign = DAG.getNode(ISD::SRA, DL, VT, N0,
+                               DAG.getConstant(BitWidth - 1, DL, ShiftAmtTy));
     AddToWorklist(Sign.getNode());
 
     // Add (N0 < 0) ? abs2 - 1 : 0;