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Re: FAIL: gcc.c-torture/compile/20000804-1.c -O0 with PIC on gcc-4_4-branch
Richard Guenther wrote:
> On Mon, Jul 13, 2009 at 5:39 AM, Jack Howarth<howarth@bromo.med.uc.edu> wrote:
>> On Mon, Jul 13, 2009 at 01:52:51AM +0100, Dave Korn wrote:
>>>> __complex__ long long f ()
>>>> {
>>>> int i[99];
>>>> __complex__ long long v;
>>>>
>>>> v += f ();
>>> Undefined behaviour, no?
>>>
>>> cheers,
>>> DaveK
>> So then the testcase is flawed and should have the darwin line corrected to...
>>
>> /* { dg-skip-if "PIC default" { { i?86-*-darwin* x86_64-*-darwin* } && ilp32 } { "*" } { "" } } */
>
> Probably yes. The testcase invokes undefined behavior because
> v is used uninitialized - but that may be the trigger for the original
> ICE, so better preserve that.
It would be useful as an experiment to try initialising it and see if that's
also what's triggering the reload failure in this particular case, because if
not then there's still a real bug to find on darwin.
cheers,
DaveK