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Don't emit structors for available_externally globals (PR19933)

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We would previously assert here when trying to figure out the section
for the global.

This makes us handle the situation more gracefully since the IR isn't
malformed.

Differential Revision: http://reviews.llvm.org/D4022

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210215 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hans Wennborg
2014-06-04 21:04:54 +00:00
parent cfee6c49ea
commit 6248abf28d
2 changed files with 20 additions and 5 deletions
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11
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
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@@ -1349,9 +1349,14 @@ void AsmPrinter::EmitXXStructorList(const Constant *List, bool isCtor) {
const TargetLoweringObjectFile &Obj = getObjFileLowering();
const MCSymbol *KeySym = nullptr;
const MCSection *KeySec = nullptr;
if (S.ComdatKey) {
KeySym = getSymbol(S.ComdatKey);
KeySec = getObjFileLowering().SectionForGlobal(S.ComdatKey, *Mang, TM);
if (GlobalValue *GV = S.ComdatKey) {
if (GV->hasAvailableExternallyLinkage())
// If the associated variable is available_externally, some other TU
// will provide its dynamic initializer.
continue;
KeySym = getSymbol(GV);
KeySec = getObjFileLowering().SectionForGlobal(GV, *Mang, TM);
}
const MCSection *OutputSection =
(isCtor ? Obj.getStaticCtorSection(S.Priority, KeySym, KeySec)