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Do not use named md nodes to track variables that are completely optimized. This does not scale while doing LTO with debug info. New approach is to include list of variables in the subprogram info directly.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138145 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2011-08-19 23:28:12 +00:00
parent 0780b6303b
commit 93d39be530
7 changed files with 100 additions and 55 deletions
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36
lib/Analysis/DIBuilder.cpp
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@ -43,6 +43,19 @@ void DIBuilder::finalize() {
DIArray SPs = getOrCreateArray(AllSubprograms);
DIType(TempSubprograms).replaceAllUsesWith(SPs);
for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i) {
DISubprogram SP(SPs.getElement(i));
if (NamedMDNode *NMD = getFnSpecificMDNode(M, SP)) {
SmallVector<Value *, 4> Variables;
for (unsigned ii = 0, ee = NMD->getNumOperands(); ii != ee; ++ii)
Variables.push_back(NMD->getOperand(ii));
if (MDNode *Temp = SP.getVariablesNodes()) {
DIArray AV = getOrCreateArray(Variables);
DIType(Temp).replaceAllUsesWith(AV);
}
NMD->eraseFromParent();
}
}
DIArray GVs = getOrCreateArray(AllGVs);
DIType(TempGVs).replaceAllUsesWith(GVs);
@ -674,13 +687,7 @@ DIVariable DIBuilder::createLocalVariable(unsigned Tag, DIDescriptor Scope,
// to preserve variable info in such situation then stash it in a
// named mdnode.
DISubprogram Fn(getDISubprogram(Scope));
StringRef FName = "fn";
if (Fn.getFunction())
FName = Fn.getFunction()->getName();
char One = '\1';
if (FName.startswith(StringRef(&One, 1)))
FName = FName.substr(1);
NamedMDNode *FnLocals = getOrInsertFnSpecificMDNode(M, FName);
NamedMDNode *FnLocals = getOrInsertFnSpecificMDNode(M, Fn);
FnLocals->addOperand(Node);
}
return DIVariable(Node);
@ -718,6 +725,11 @@ DISubprogram DIBuilder::createFunction(DIDescriptor Context,
Function *Fn,
MDNode *TParams,
MDNode *Decl) {
Value *TElts[] = { GetTagConstant(VMContext, DW_TAG_base_type) };
MDNode *Temp = MDNode::getTemporary(VMContext, TElts);
Value *TVElts[] = { Temp };
MDNode *THolder = MDNode::get(VMContext, TVElts);
Value *Elts[] = {
GetTagConstant(VMContext, dwarf::DW_TAG_subprogram),
llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
@ -737,7 +749,8 @@ DISubprogram DIBuilder::createFunction(DIDescriptor Context,
ConstantInt::get(Type::getInt1Ty(VMContext), isOptimized),
Fn,
TParams,
Decl
Decl,
THolder
};
MDNode *Node = MDNode::get(VMContext, Elts);
@ -760,6 +773,11 @@ DISubprogram DIBuilder::createMethod(DIDescriptor Context,
bool isOptimized,
Function *Fn,
MDNode *TParam) {
Value *TElts[] = { GetTagConstant(VMContext, DW_TAG_base_type) };
MDNode *Temp = MDNode::getTemporary(VMContext, TElts);
Value *TVElts[] = { Temp };
MDNode *THolder = MDNode::get(VMContext, TVElts);
Value *Elts[] = {
GetTagConstant(VMContext, dwarf::DW_TAG_subprogram),
llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
@ -779,6 +797,8 @@ DISubprogram DIBuilder::createMethod(DIDescriptor Context,
ConstantInt::get(Type::getInt1Ty(VMContext), isOptimized),
Fn,
TParam,
llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
THolder
};
MDNode *Node = MDNode::get(VMContext, Elts);
return DISubprogram(Node);