switch (RHSCC) {
default: llvm_unreachable("Unknown integer condition code!");
case ICmpInst::ICMP_EQ:
- if (LHSCst == SubOne(RHSCst)) {
- // (X == 13 | X == 14) -> X-13 <u 2
- Constant *AddCST = ConstantExpr::getNeg(LHSCst);
- Value *Add = Builder->CreateAdd(Val, AddCST, Val->getName()+".off");
- AddCST = ConstantExpr::getSub(AddOne(RHSCst), LHSCst);
- return Builder->CreateICmpULT(Add, AddCST);
- }
-
if (LHS->getOperand(0) == RHS->getOperand(0)) {
// if LHSCst and RHSCst differ only by one bit:
// (A == C1 || A == C2) -> (A & ~(C1 ^ C2)) == C1
}
}
+ if (LHSCst == SubOne(RHSCst)) {
+ // (X == 13 | X == 14) -> X-13 <u 2
+ Constant *AddCST = ConstantExpr::getNeg(LHSCst);
+ Value *Add = Builder->CreateAdd(Val, AddCST, Val->getName()+".off");
+ AddCST = ConstantExpr::getSub(AddOne(RHSCst), LHSCst);
+ return Builder->CreateICmpULT(Add, AddCST);
+ }
+
break; // (X == 13 | X == 15) -> no change
case ICmpInst::ICMP_UGT: // (X == 13 | X u> 14) -> no change
case ICmpInst::ICMP_SGT: // (X == 13 | X s> 14) -> no change