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If a instruction belongs to another function (and not current function) as per debug info attached with the instruction then ignore the dangling lexical scope of this instruction. Such scopes are unreachable.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93967 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2010-01-20 02:05:23 +00:00
parent 221925ecca
commit 42aafd7e57
2 changed files with 40 additions and 4 deletions
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16
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -2042,10 +2042,18 @@ bool DwarfDebug::extractScopeInformation(MachineFunction *MF) {
// Each scope has first instruction and last instruction to mark beginning
// and end of a scope respectively. Create an inverse map that list scopes
// starts (and ends) with an instruction. One instruction may start (or end)
// multiple scopes.
for (DenseMap<MDNode *, DbgScope *>::iterator DI = DbgScopeMap.begin(),
DE = DbgScopeMap.end(); DI != DE; ++DI) {
DbgScope *S = DI->second;
// multiple scopes. Ignore scopes that are not reachable.
SmallVector<DbgScope *, 4> WorkList;
WorkList.push_back(CurrentFnDbgScope);
while (!WorkList.empty()) {
DbgScope *S = WorkList.back(); WorkList.pop_back();
SmallVector<DbgScope *, 4> &Children = S->getScopes();
if (!Children.empty())
for (SmallVector<DbgScope *, 4>::iterator SI = Children.begin(),
SE = Children.end(); SI != SE; ++SI)
WorkList.push_back(*SI);
if (S->isAbstractScope())
continue;
const MachineInstr *MI = S->getFirstInsn();