[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

Chris Lattner clattner at apple.com
Tue Jun 14 15:44:53 PDT 2011

On Jun 14, 2011, at 1:57 PM, Eli Friedman wrote:

> 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
> http://smooshlab.apple.com:8013/builders/gccTestSuite_clang-x86_64-darwin10-RA__c

Interesting, one instance (array-5.c) is failing exactly because of what we're trying to do here.  Passing -std=c99 fixes the failure.  Does anyone know how to do this to the test?


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