On Fri, Aug 3, 2012 at 10:39 AM, Benjamin Kramer <[email protected]>wrote:
> Author: d0k > Date: Fri Aug 3 03:39:58 2012 > New Revision: 161236 > > URL: http://llvm.org/viewvc/llvm-project?rev=161236&view=rev > Log: > Fix failed to generate vtables in certain cases. > > By C++ standard, the vtable should be generated if the first non-inline > virtual function is defined in the TU. Current version of clang doesn't > generate vtable if the first virtual function is defaulted, because the > key function is regarded as the defaulted function. > > Patch by Li Kan! > > Added: > cfe/trunk/test/CodeGenCXX/cxx11-vtable-key-function.cpp > Modified: > cfe/trunk/lib/AST/RecordLayoutBuilder.cpp > > Modified: cfe/trunk/lib/AST/RecordLayoutBuilder.cpp > URL: > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/RecordLayoutBuilder.cpp?rev=161236&r1=161235&r2=161236&view=diff > > ============================================================================== > --- cfe/trunk/lib/AST/RecordLayoutBuilder.cpp (original) > +++ cfe/trunk/lib/AST/RecordLayoutBuilder.cpp Fri Aug 3 03:39:58 2012 > @@ -2351,6 +2351,9 @@ > if (MD->hasInlineBody()) > continue; > > + if (!MD->isUserProvided()) > + continue; > + > // We found it. > return MD; > } > > Added: cfe/trunk/test/CodeGenCXX/cxx11-vtable-key-function.cpp > URL: > http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/cxx11-vtable-key-function.cpp?rev=161236&view=auto > > ============================================================================== > --- cfe/trunk/test/CodeGenCXX/cxx11-vtable-key-function.cpp (added) > +++ cfe/trunk/test/CodeGenCXX/cxx11-vtable-key-function.cpp Fri Aug 3 > 03:39:58 2012 > @@ -0,0 +1,11 @@ > +// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - > -std=c++11 | FileCheck %s > +// PR13424 > + > +struct X { > + virtual ~X() = default; > + virtual void f(); > +}; > + > +void X::f() {} > + > +// CHECK: @_ZTV1X = unnamed_addr constant > > > _______________________________________________ > cfe-commits mailing list > [email protected] > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits > I somehow doubt that the C++ Standard would require anything like that, since it does not even mention virtual tables to begin with. Is it not the Itanium ABI ? -- Matthieu
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