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Revert "DebugInfo: Ensure that all debug location scope chains from instructions within a function, lead to the function itself." 

This reverts commit r212205.

Reverting this again, still seeing crashes when building compiler-rt...
Sorry for the continued noise, not sure why I'm failing to reproduce
this locally.

llvm-svn: 212226
This commit is contained in:
David Blaikie 2014-07-02 21:42:28 +00:00
parent dda6194399
commit 9a0f7948a2
3 changed files with 4 additions and 34 deletions
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3
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -788,7 +788,8 @@ void DwarfDebug::finishVariableDefinitions() {
for (const auto &Var : ConcreteVariables) {
DIE *VariableDie = Var->getDIE();
// FIXME: There shouldn't be any variables without DIEs.
assert(VariableDie);
if (!VariableDie)
continue;
// FIXME: Consider the time-space tradeoff of just storing the unit pointer
// in the ConcreteVariables list, rather than looking it up again here.
// DIE::getUnit isn't simple - it walks parent pointers, etc.

9
llvm/lib/CodeGen/LexicalScopes.cpp
View File

@ -137,8 +137,6 @@ LexicalScope *LexicalScopes::findLexicalScope(DebugLoc DL) {
/// getOrCreateLexicalScope - Find lexical scope for the given DebugLoc. If
/// not available then create new lexical scope.
LexicalScope *LexicalScopes::getOrCreateLexicalScope(DebugLoc DL) {
if (DL.isUnknown())
return nullptr;
MDNode *Scope = nullptr;
MDNode *InlinedAt = nullptr;
DL.getScopeAndInlinedAt(Scope, InlinedAt, MF->getFunction()->getContext());
@ -174,12 +172,9 @@ LexicalScope *LexicalScopes::getOrCreateRegularScope(MDNode *Scope) {
std::make_tuple(Parent, DIDescriptor(Scope),
nullptr, false)).first;
if (!Parent) {
assert(DIDescriptor(Scope).isSubprogram());
assert(DISubprogram(Scope).describes(MF->getFunction()));
assert(!CurrentFnLexicalScope);
if (!Parent && DIDescriptor(Scope).isSubprogram() &&
DISubprogram(Scope).describes(MF->getFunction()))
CurrentFnLexicalScope = &I->second;
}
return &I->second;
}

26
llvm/lib/IR/DebugInfo.cpp
View File

@ -538,32 +538,6 @@ bool DISubprogram::Verify() const {
if (isLValueReference() && isRValueReference())
return false;
if (auto *F = getFunction()) {
LLVMContext &Ctxt = F->getContext();
for (auto &BB : *F) {
for (auto &I : BB) {
DebugLoc DL = I.getDebugLoc();
if (DL.isUnknown())
continue;
MDNode *Scope = nullptr;
MDNode *IA = nullptr;
// walk the inlined-at scopes
while (DL.getScopeAndInlinedAt(Scope, IA, F->getContext()), IA)
DL = DebugLoc::getFromDILocation(IA);
DL.getScopeAndInlinedAt(Scope, IA, Ctxt);
assert(!IA);
while (!DIDescriptor(Scope).isSubprogram()) {
DILexicalBlockFile D(Scope);
Scope = D.isLexicalBlockFile()
? D.getScope()
: DebugLoc::getFromDILexicalBlock(Scope).getScope(Ctxt);
}
if (!DISubprogram(Scope).describes(F))
return false;
}
}
}
return DbgNode->getNumOperands() == 20;
}