[X86] Use APInt::isOneValue and ConstantSDNode::isOne. NFC

These are implemented slightly more efficiently than comparing
to 1 in the case that the value is more than 64 bits.

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index ff15c2b..65a7bb1 100644 (file)
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -4834,7 +4834,7 @@ static X86::CondCode TranslateX86CC(ISD::CondCode SetCCOpcode, const SDLoc &DL,
         // X >= 0   -> X == 0, jump on !sign.
         return X86::COND_NS;
       }
-      if (SetCCOpcode == ISD::SETLT && RHSC->getAPIntValue() == 1) {
+      if (SetCCOpcode == ISD::SETLT && RHSC->isOne()) {
         // X < 1   -> X <= 0
         RHS = DAG.getConstant(0, DL, RHS.getValueType());
         return X86::COND_LE;
@@ -39086,7 +39086,7 @@ static SDValue combineShiftLeft(SDNode *N, SelectionDAG &DAG) {
       // We shift all of the values by one. In many cases we do not have
       // hardware support for this operation. This is better expressed as an ADD
       // of two values.
-      if (N1SplatC->getAPIntValue() == 1)
+      if (N1SplatC->isOne())
         return DAG.getNode(ISD::ADD, SDLoc(N), VT, N0, N0);
     }
 
@@ -40493,7 +40493,7 @@ static SDValue combineOrShiftToFunnelShift(SDNode *N, SelectionDAG &DAG,
           (ShAmt1Op0 == ShAmt0 || ShAmt1Op0 == ShMsk0)) {
         if (Op1.getOpcode() == InnerShift &&
             isa<ConstantSDNode>(Op1.getOperand(1)) &&
-            Op1.getConstantOperandAPInt(1) == 1) {
+            Op1.getConstantOperandAPInt(1).isOneValue()) {
           return GetFunnelShift(Op0, Op1.getOperand(0), ShAmt0);
         }
         // Test for ADD( Y, Y ) as an equivalent to SHL( Y, 1 ).
@@ -42496,7 +42496,7 @@ static SDValue foldXor1SetCC(SDNode *N, SelectionDAG &DAG) {
     return SDValue();
 
   SDValue LHS = N->getOperand(0);
-  if (!OneConstant(N->getOperand(1)) || LHS->getOpcode() != X86ISD::SETCC)
+  if (!isOneConstant(N->getOperand(1)) || LHS->getOpcode() != X86ISD::SETCC)
     return SDValue();
 
   X86::CondCode NewCC = X86::GetOppositeBranchCondition(