maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
llvm/lib/Analysis/InstructionSimplify.cpp
View File

@ -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);
}
}