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Once we're down to "setcc type constant1, constant2", at least come up

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with the right answer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30550 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2006-09-20 23:02:24 +00:00
parent f824868ed9
commit af2f1fe94e
2 changed files with 68 additions and 18 deletions
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32
lib/Transforms/Scalar/PredicateSimplifier.cpp
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@ -524,6 +524,9 @@ Value *PredicateSimplifier::resolve(SetCondInst *SCI,
const PropertySet &KP) {
// Attempt to resolve the SetCondInst to a boolean.
static ConstantBool *True = ConstantBool::True,
*False = ConstantBool::False;
Value *SCI0 = resolve(SCI->getOperand(0), KP),
*SCI1 = resolve(SCI->getOperand(1), KP);
@ -536,10 +539,8 @@ Value *PredicateSimplifier::resolve(SetCondInst *SCI,
if (NE != KP.Properties.end()) {
switch (SCI->getOpcode()) {
case Instruction::SetEQ:
return ConstantBool::False;
case Instruction::SetNE:
return ConstantBool::True;
case Instruction::SetEQ: return False;
case Instruction::SetNE: return True;
case Instruction::SetLE:
case Instruction::SetGE:
case Instruction::SetLT:
@ -553,25 +554,20 @@ Value *PredicateSimplifier::resolve(SetCondInst *SCI,
return SCI;
}
uint64_t I1 = CI1->getRawValue(), I2 = CI2->getRawValue();
switch(SCI->getOpcode()) {
case Instruction::SetLE:
case Instruction::SetGE:
case Instruction::SetEQ:
if (CI1->getRawValue() == CI2->getRawValue())
return ConstantBool::True;
else
return ConstantBool::False;
case Instruction::SetLT:
case Instruction::SetGT:
case Instruction::SetNE:
if (CI1->getRawValue() == CI2->getRawValue())
return ConstantBool::False;
else
return ConstantBool::True;
case Instruction::SetLE: if (I1 <= I2) return True; else return False;
case Instruction::SetGE: if (I1 >= I2) return True; else return False;
case Instruction::SetEQ: if (I1 == I2) return True; else return False;
case Instruction::SetLT: if (I1 < I2) return True; else return False;
case Instruction::SetGT: if (I1 > I2) return True; else return False;
case Instruction::SetNE: if (I1 != I2) return True; else return False;
default:
assert(0 && "Unknown opcode in SetContInst.");
break;
}
return SCI;
}
Value *PredicateSimplifier::resolve(BinaryOperator *BO,