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Handle some kernel code than ends in [0 x sbyte]. I think this is safe

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27672 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Lenharth 2006-04-13 19:31:49 +00:00
parent 60d07eeffe
commit 99c1942ba7
1 changed files with 11 additions and 2 deletions
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13
lib/Analysis/DataStructure/Local.cpp
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@ -1116,8 +1116,17 @@ void GraphBuilder::MergeConstantInitIntoNode(DSNodeHandle &NH, Constant *C) {
const StructLayout *SL = TD.getStructLayout(CS->getType());
for (unsigned i = 0, e = CS->getNumOperands(); i != e; ++i) {
DSNode *NHN = NH.getNode();
DSNodeHandle NewNH(NHN, NH.getOffset()+(unsigned)SL->MemberOffsets[i]);
MergeConstantInitIntoNode(NewNH, cast<Constant>(CS->getOperand(i)));
//Some programmers think ending a structure with a [0 x sbyte] is cute
//This should be ok as the allocation type should grow this type when
//it is merged in if it is bigger.
if (SL->MemberOffsets[i] < SL->StructSize) {
DSNodeHandle NewNH(NHN, NH.getOffset()+(unsigned)SL->MemberOffsets[i]);
MergeConstantInitIntoNode(NewNH, cast<Constant>(CS->getOperand(i)));
} else if (SL->MemberOffsets[i] == SL->StructSize) {
DEBUG(std::cerr << "Zero size element at end of struct\n");
} else {
assert(0 && "type was smaller than offsets of of struct layout indicate");
}
}
} else if (isa<ConstantAggregateZero>(C) || isa<UndefValue>(C)) {
// Noop