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Add support to preserve type info for the variables that are removed by the optimizer.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103798 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2010-05-14 21:01:35 +00:00
parent 1b2c761a9c
commit 98e1cac52c
4 changed files with 43 additions and 17 deletions
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lib/Analysis/DebugInfo.cpp
+7 -2
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@@ -1028,7 +1028,7 @@ DIVariable DIFactory::CreateVariable(unsigned Tag, DIDescriptor Context,
StringRef Name,
DIFile F,
unsigned LineNo,
DIType Ty) {
DIType Ty, bool OptimizedBuild) {
Value *Elts[] = {
GetTagConstant(Tag),
Context,
@@ -1037,7 +1037,12 @@ DIVariable DIFactory::CreateVariable(unsigned Tag, DIDescriptor Context,
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
Ty,
};
return DIVariable(MDNode::get(VMContext, &Elts[0], 6));
MDNode *Node = MDNode::get(VMContext, &Elts[0], 6);
if (OptimizedBuild) {
NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.lv");
NMD->addOperand(Node);
}
return DIVariable(Node);
}