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As Duncan pointed out, pointers tend not to be in floating point format...for now.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152499 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2012-03-10 18:20:55 +00:00
parent 30a73022bb
commit 798d013bcb
1 changed files with 6 additions and 6 deletions
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12
lib/Analysis/InstructionSimplify.cpp
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@ -1610,30 +1610,30 @@ static Value *SimplifyICmpInst(unsigned Predicate, Value *LHS, Value *RHS,
// If both sides are different identified objects, they aren't equal
// unless they're null.
if (LHSPtr != RHSPtr && llvm::isIdentifiedObject(RHSPtr) &&
(Pred == CmpInst::ICMP_EQ || Pred == CmpInst::FCMP_UEQ))
Pred == CmpInst::ICMP_EQ)
return ConstantInt::get(ITy, false);
// A local identified object (alloca or noalias call) can't equal any
// incoming argument, unless they're both null.
if (isa<Instruction>(LHSPtr) && isa<Argument>(RHSPtr) &&
(Pred == CmpInst::ICMP_EQ || Pred == CmpInst::FCMP_UEQ))
Pred == CmpInst::ICMP_EQ)
return ConstantInt::get(ITy, false);
}
// Assume that the constant null is on the right.
if (llvm::isKnownNonNull(LHSPtr) && isa<ConstantPointerNull>(RHSPtr)) {
if (Pred == CmpInst::ICMP_EQ || Pred == CmpInst::FCMP_UEQ)
if (Pred == CmpInst::ICMP_EQ)
return ConstantInt::get(ITy, false);
else if (Pred == CmpInst::ICMP_NE || Pred == CmpInst::FCMP_ONE)
else if (Pred == CmpInst::ICMP_NE)
return ConstantInt::get(ITy, true);
}
} else if (isa<Argument>(LHSPtr)) {
RHSPtr = RHSPtr->stripInBoundsOffsets();
// An alloca can't be equal to an argument.
if (isa<AllocaInst>(RHSPtr)) {
if (Pred == CmpInst::ICMP_EQ || Pred == CmpInst::FCMP_UEQ)
if (Pred == CmpInst::ICMP_EQ)
return ConstantInt::get(ITy, false);
else if (Pred == CmpInst::ICMP_NE || Pred == CmpInst::FCMP_ONE)
else if (Pred == CmpInst::ICMP_NE)
return ConstantInt::get(ITy, true);
}
}