We used to create children DIEs for a scope, then check whether ScopeDIE is
null. If ScopeDIE is null, the children DIEs will be dangling. Other DIEs can
link to those dangling DIEs, which are not emitted at all, causing dwarf error.
The current testing case is 4k lines, from MultiSource/BenchMark/McCat/09-vor.
rdar://problem/
13071959
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174084
91177308-0d34-0410-b5e6-
96231b3b80d8
if (!Scope || !Scope->getScopeNode())
return NULL;
+ DIScope DS(Scope->getScopeNode());
+ // Early return to avoid creating dangling variable|scope DIEs.
+ if (!Scope->getInlinedAt() && DS.isSubprogram() && Scope->isAbstractScope() &&
+ !TheCU->getDIE(DS))
+ return NULL;
+
SmallVector<DIE *, 8> Children;
DIE *ObjectPointer = NULL;
for (unsigned j = 0, M = Scopes.size(); j < M; ++j)
if (DIE *Nested = constructScopeDIE(TheCU, Scopes[j]))
Children.push_back(Nested);
- DIScope DS(Scope->getScopeNode());
DIE *ScopeDIE = NULL;
if (Scope->getInlinedAt())
ScopeDIE = constructInlinedScopeDIE(TheCU, Scope);