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DebugInfo: Provide a utility for building a mapping from llvm::Function*s to llvm::DISubprograms

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Update DeadArgumentElimintation to use this, with the intent of reusing
the functionality for ArgumentPromotion as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212122 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie
2014-07-01 20:05:26 +00:00
parent 4f5fa35b59
commit f652ec594e
3 changed files with 23 additions and 31 deletions
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19
lib/IR/DebugInfo.cpp
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@ -1526,3 +1526,22 @@ unsigned llvm::getDebugMetadataVersionFromModule(const Module &M) {
return 0;
return cast<ConstantInt>(Val)->getZExtValue();
}
llvm::DenseMap<llvm::Function *, llvm::DISubprogram> llvm::makeSubprogramMap(Module &M) {
DenseMap<Function *, DISubprogram> R;
NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu");
if (!CU_Nodes)
return R;
for (MDNode *N : CU_Nodes->operands()) {
DICompileUnit CUNode(N);
DIArray SPs = CUNode.getSubprograms();
for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i) {
DISubprogram SP(SPs.getElement(i));
if (Function *F = SP.getFunction())
R.insert(std::make_pair(F, SP));
}
}
return R;
}