[X86] Use SDValue::operator== instead of DAG.isEqualTo in strictly integer matching.

isEqualTo is more useful for floating point. operator== is sufficient for integer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@340130 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/X86/X86ISelLowering.cpp

@@ -33046,7 +33046,7 @@ static SDValue combineSelect(SDNode *N, SelectionDAG &DAG,
     }
 
     if (Other.getNode() && Other->getNumOperands() == 2 &&
-        DAG.isEqualTo(Other->getOperand(0), Cond.getOperand(0))) {
+        Other->getOperand(0) == Cond.getOperand(0)) {
       SDValue OpLHS = Other->getOperand(0), OpRHS = Other->getOperand(1);
       SDValue CondRHS = Cond->getOperand(1);
 
@@ -33059,7 +33059,7 @@ static SDValue combineSelect(SDNode *N, SelectionDAG &DAG,
       // x >= y ? x-y : 0 --> subus x, y
       // x >  y ? x-y : 0 --> subus x, y
       if ((CC == ISD::SETUGE || CC == ISD::SETUGT) &&
-          Other->getOpcode() == ISD::SUB && DAG.isEqualTo(OpRHS, CondRHS))
+          Other->getOpcode() == ISD::SUB && OpRHS == CondRHS)
         return SplitOpsAndApply(DAG, Subtarget, DL, VT, { OpLHS, OpRHS },
                                 SUBUSBuilder);