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

llvm-svn: 152499
This commit is contained in:
Bill Wendling 2012-03-10 18:20:55 +00:00
parent fee6372daa
commit 2bbb7945e7
1 changed files with 6 additions and 6 deletions
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12
llvm/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 // If both sides are different identified objects, they aren't equal
// unless they're null. // unless they're null.
if (LHSPtr != RHSPtr && llvm::isIdentifiedObject(RHSPtr) && if (LHSPtr != RHSPtr && llvm::isIdentifiedObject(RHSPtr) &&
(Pred == CmpInst::ICMP_EQ || Pred == CmpInst::FCMP_UEQ)) Pred == CmpInst::ICMP_EQ)
return ConstantInt::get(ITy, false); return ConstantInt::get(ITy, false);
// A local identified object (alloca or noalias call) can't equal any // A local identified object (alloca or noalias call) can't equal any
// incoming argument, unless they're both null. // incoming argument, unless they're both null.
if (isa<Instruction>(LHSPtr) && isa<Argument>(RHSPtr) && if (isa<Instruction>(LHSPtr) && isa<Argument>(RHSPtr) &&
(Pred == CmpInst::ICMP_EQ || Pred == CmpInst::FCMP_UEQ)) Pred == CmpInst::ICMP_EQ)
return ConstantInt::get(ITy, false); return ConstantInt::get(ITy, false);
} }
// Assume that the constant null is on the right. // Assume that the constant null is on the right.
if (llvm::isKnownNonNull(LHSPtr) && isa<ConstantPointerNull>(RHSPtr)) { 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); 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); return ConstantInt::get(ITy, true);
} }
} else if (isa<Argument>(LHSPtr)) { } else if (isa<Argument>(LHSPtr)) {
RHSPtr = RHSPtr->stripInBoundsOffsets(); RHSPtr = RHSPtr->stripInBoundsOffsets();
// An alloca can't be equal to an argument. // An alloca can't be equal to an argument.
if (isa<AllocaInst>(RHSPtr)) { if (isa<AllocaInst>(RHSPtr)) {
if (Pred == CmpInst::ICMP_EQ || Pred == CmpInst::FCMP_UEQ) if (Pred == CmpInst::ICMP_EQ)
return ConstantInt::get(ITy, false); 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); return ConstantInt::get(ITy, true);
} }
} }