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DebugInfo: Introduce DIBuilder::replaceTemporary()

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Add `DIBuilder::replaceTemporary()` as a replacement for
`DIDescriptor::replaceAllUsesWith()`.  I'll update clang to use the new
method, and then come back to delete the original.

This method dispatches to `replaceAllUsesWith()` or
`replaceWithUniqued()`, depending on whether the replacement is actually
a different node from the original.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234695 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith 2015-04-11 19:04:09 +00:00
parent 822147fcb2
commit 9b30c7bd38
1 changed files with 17 additions and 0 deletions
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17
include/llvm/IR/DIBuilder.h
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@ -701,6 +701,23 @@ namespace llvm {
/// resolve cycles.
void replaceArrays(DICompositeType &T, DIArray Elements,
DIArray TParems = DIArray());
/// \brief Replace a temporary node.
///
/// Call \a MDNode::replaceAllUsesWith() on \c N, replacing it with \c
/// Replacement.
///
/// If \c Replacement is the same as \c N.get(), instead call \a
/// MDNode::replaceWithUniqued(). In this case, the uniqued node could
/// have a different address, so we return the final address.
template <class NodeTy>
NodeTy *replaceTemporary(TempMDNode &&N, NodeTy *Replacement) {
if (N.get() == Replacement)
return cast<NodeTy>(MDNode::replaceWithUniqued(std::move(N)));
N->replaceAllUsesWith(Replacement);
return Replacement;
}
};
} // end namespace llvm