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IR: Restore the old behavior of getDISubprogram

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getDISubprogram was mistakenly thought to contain a bug: we thought we
might need to try harder if we found a DebugLoc we didn't find.

llvm-svn: 221044
This commit is contained in:
David Majnemer 2014-11-01 07:57:14 +00:00
parent 401e61e9a6
commit 20fdfc27f5
1 changed files with 9 additions and 10 deletions
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19
lib/IR/DebugInfo.cpp
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@ -914,17 +914,16 @@ DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
DISubprogram llvm::getDISubprogram(const Function *F) {
// We look for the first instr that has a debug annotation leading back to F.
const LLVMContext &Ctx = F->getParent()->getContext();
for (auto &BB : *F) {
for (auto &Inst : BB.getInstList()) {
DebugLoc DLoc = Inst.getDebugLoc();
if (DLoc.isUnknown())
continue;
const MDNode *Scope = DLoc.getScopeNode(Ctx);
DISubprogram Subprogram = getDISubprogram(Scope);
if (Subprogram.describes(F))
return Subprogram;
}
auto Inst = std::find_if(BB.begin(), BB.end(), [](const Instruction &Inst) {
return !Inst.getDebugLoc().isUnknown();
});
if (Inst == BB.end())
continue;
DebugLoc DLoc = Inst->getDebugLoc();
const MDNode *Scope = DLoc.getScopeNode(F->getParent()->getContext());
DISubprogram Subprogram = getDISubprogram(Scope);
return Subprogram.describes(F) ? Subprogram : DISubprogram();
}
return DISubprogram();