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PR16995: DebugInfo: Don't overwrite existing member lists when adding template arguments

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With the added debug assertions this fix is covered by existing Clang
tests. (& found some other issues, also fixed)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189495 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie 2013-08-28 17:28:16 +00:00
parent cfe7a7c7e3
commit 980879e618
1 changed files with 18 additions and 1 deletions
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19
lib/IR/DebugInfo.cpp
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@ -655,7 +655,24 @@ void DICompositeType::setTypeArray(DIArray Elements, DIArray TParams) {
"If you're setting the template parameters this should include a slot "
"for that!");
TrackingVH<MDNode> N(*this);
N->replaceOperandWith(10, Elements);
if (Elements) {
#ifndef NDEBUG
// Check that we're not dropping any elements on the floor here
if (const MDNode *El = cast_or_null<MDNode>(N->getOperand(10))) {
for (unsigned i = 0; i != El->getNumOperands(); ++i) {
if (i == 0 && isa<ConstantInt>(El->getOperand(i)))
continue;
const MDNode *E = cast<MDNode>(El->getOperand(i));
bool found = false;
for (unsigned j = 0; !found && j != Elements.getNumElements(); ++j) {
found = E == Elements.getElement(j);
}
assert(found && "Losing a member during member list replacement");
}
}
#endif
N->replaceOperandWith(10, Elements);
}
if (TParams)
N->replaceOperandWith(13, TParams);
DbgNode = N;