[cfe-commits] r132983 - in /cfe/trunk: include/clang/Basic/DiagnosticSemaKinds.td lib/Sema/SemaType.cpp test/Sema/const-eval.c test/Sema/i-c-e.c test/Sema/struct-decl.c test/Sema/typedef-variable-type.c test/Sema/vla.c test/SemaCXX/c99-variable-l

[Eli Friedman]

On Mon, Jun 13, 2011 at 11:38 PM, Chris Lattner <sabre at nondot.org> wrote:
> Author: lattner
> Date: Tue Jun 14 01:38:10 2011
> New Revision: 132983
>
> URL: http://llvm.org/viewvc/llvm-project?rev=132983&view=rev
> Log:
> when compiling in a GNU mode (e.g. gnu99) treat VLAs with a size that can be folded to a constant
> as constant size arrays.  This has slightly different semantics in some insane cases, but allows
> us to accept some constructs that GCC does.  Continue to be pedantic in -std=c99 and other
> modes.  This addressed rdar://8733881 - error "variable-sized object may not be initialized"; g++ accepts same code
>
> Modified:
>    cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
>    cfe/trunk/lib/Sema/SemaType.cpp
>    cfe/trunk/test/Sema/const-eval.c
>    cfe/trunk/test/Sema/i-c-e.c
>    cfe/trunk/test/Sema/struct-decl.c
>    cfe/trunk/test/Sema/typedef-variable-type.c
>    cfe/trunk/test/Sema/vla.c
>    cfe/trunk/test/SemaCXX/c99-variable-length-array.cpp

This should probably get added to
http://clang.llvm.org/docs/UsersManual.html#c_modes .

-Eli