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Pull in r203007 from upstream clang trunk:

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Don't produce an alias between destructors with different calling conventions.

  Fixes pr19007.

(Please note that is an LLVM PR identifier, not a FreeBSD one.)

This should fix Firefox and/or libxul crashes (due to problems with
regparm/stdcall calling conventions) on i386.

Reported by:	multiple users on freebsd-current
PR:		bin/187103
MFC after:	1 week
This commit is contained in:
Dimitry Andric 2014-03-05 22:43:30 +00:00
parent 256ea2aba9
commit 689f150570
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=262809
1 changed files with 6 additions and 0 deletions
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6
contrib/llvm/tools/clang/lib/CodeGen/CGCXX.cpp
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@ -92,7 +92,13 @@ bool CodeGenModule::TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D) {
if (!ClassLayout.getBaseClassOffset(UniqueBase).isZero())
return true;
// Give up if the calling conventions don't match. We could update the call,
// but it is probably not worth it.
const CXXDestructorDecl *BaseD = UniqueBase->getDestructor();
if (BaseD->getType()->getAs<FunctionType>()->getCallConv() !=
D->getType()->getAs<FunctionType>()->getCallConv())
return true;
return TryEmitDefinitionAsAlias(GlobalDecl(D, Dtor_Base),
GlobalDecl(BaseD, Dtor_Base),
false);