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Fix a crash compiling Obsequi 

llvm-svn: 26529
This commit is contained in:
Chris Lattner 2006-03-04 21:48:01 +00:00
parent f97c7f5dbb
commit 3e19c23765
1 changed files with 12 additions and 5 deletions
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17
llvm/lib/Analysis/BasicAliasAnalysis.cpp
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@ -637,17 +637,24 @@ CheckGEPInstructions(const Type* BasePtr1Ty, std::vector<Value*> &GEP1Ops,
// than the first constant index of GEP2.
// Advance BasePtr[12]Ty over this first differing constant operand.
BasePtr2Ty = cast<CompositeType>(BasePtr1Ty)->getTypeAtIndex(GEP2Ops[FirstConstantOper]);
BasePtr1Ty = cast<CompositeType>(BasePtr1Ty)->getTypeAtIndex(GEP1Ops[FirstConstantOper]);
BasePtr2Ty = cast<CompositeType>(BasePtr1Ty)->
getTypeAtIndex(GEP2Ops[FirstConstantOper]);
BasePtr1Ty = cast<CompositeType>(BasePtr1Ty)->
getTypeAtIndex(GEP1Ops[FirstConstantOper]);
// We are going to be using TargetData::getIndexedOffset to determine the
// offset that each of the GEP's is reaching. To do this, we have to convert
// all variable references to constant references. To do this, we convert the
// initial equal sequence of variables into constant zeros to start with.
for (unsigned i = 0; i != FirstConstantOper; ++i)
if (!isa<ConstantInt>(GEP1Ops[i]) || !isa<ConstantInt>(GEP2Ops[i]))
// initial sequence of array subscripts into constant zeros to start with.
const Type *ZeroIdxTy = GEPPointerTy;
for (unsigned i = 0; i != FirstConstantOper; ++i) {
if (!isa<StructType>(ZeroIdxTy))
GEP1Ops[i] = GEP2Ops[i] = Constant::getNullValue(Type::UIntTy);
if (const CompositeType *CT = dyn_cast<CompositeType>(ZeroIdxTy))
ZeroIdxTy = CT->getTypeAtIndex(GEP1Ops[i]);
}
// We know that GEP1Ops[FirstConstantOper] & GEP2Ops[FirstConstantOper] are ok
// Loop over the rest of the operands...