[SDAG, x86] allow targets to override test for binop opcodes

This follows the pattern of the existing isCommutativeBinOp().

x86 shows improvements from vector narrowing for the min/max opcodes.

llvm-svn: 360639

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index fe982b1aa96..3f3305f3ab9 100644
--- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -1747,8 +1747,9 @@ bool TargetLowering::SimplifyDemandedVectorElts(SDValue Op,
 static APInt getKnownUndefForVectorBinop(SDValue BO, SelectionDAG &DAG,
                                          const APInt &UndefOp0,
                                          const APInt &UndefOp1) {
+  const TargetLowering &TLI = DAG.getTargetLoweringInfo();
   EVT VT = BO.getValueType();
-  assert(ISD::isBinaryOp(BO.getNode()) && VT.isVector() && "Vector binop only");
+  assert(TLI.isBinOp(BO.getOpcode()) && VT.isVector() && "Vector binop only");
 
   EVT EltVT = VT.getVectorElementType();
   unsigned NumElts = VT.getVectorNumElements();