[Bug objc/45925] New objc test failures

["nicola at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45925

Nicola Pero <nicola at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |nicola at gcc dot gnu.org

--- Comment #1 from Nicola Pero <nicola at gcc dot gnu.org> 2010-10-07 08:18:03 UTC ---
Is there any way I can see the detailed logs of the failure ?

If it's the same problem that IainS reported to me privately, then it's caused
by a bug in the Apple testcases (objc-foreach-1.m etc) --

@implementation MyList
- (unsigned int)countByEnumeratingWithState:(struct __objcFastEnumerationState
*)state objects:(id *)items count:(unsigned int)stackcount
{
        return 0;
}
@end

the return value should be 'long unsigned int', not 'unsigned int', and so for
'stackcount'.

What happens then is that the ObjC code generates a method call
returning/taking a 'long unsigned int', but the prototype says 'unsigned int',
and a gimplify check fails and aborts compilation.

I would imagine a fix would entail:

 * having the ObjC FE check that countByEnumeratingWithState:objects:count: has
the expected method signature; if not, produce an error.  The testcases would
still fail, but with an informative message rather than an internal compiler
error :-)

 * fix the testcases (and add a testcase for the above error).

Thanks