[committed] testsuite: Fix for targets not passing argc/argv [PR116154]

[Jeff Law]

On 7/31/24 10:39 AM, Dimitar Dimitrov wrote:
> PRU and other simulator targets do not pass any argv arguments
> to main.  Instead of erroneously relying on argc==0, use a volatile
> variable instead.
> 
> I reverted the fix for PR67947 in r6-3891-g8a18fcf4aa1d5c, and made sure
> that the updated test case still fails for x86_64:
> 
>    $ make check-gcc-c RUNTESTFLAGS="dg-torture.exp=pr67947.c"
>    ...
>    FAIL: gcc.dg/torture/pr67947.c   -O1  execution test
>    ...
>    # of expected passes            8
>    # of unexpected failures        8
> 
> Fix was suggested by Andrew Pinski in PR116154.  Committed as obvious.
> 
> 	PR testsuite/116154
> 
> gcc/testsuite/ChangeLog:
> 
> 	* gcc.dg/torture/pr67947.c: Use volatile variable instead of
> 	argc.
Thanks.  I'd noted this failing in various targets in my tester and 
assumed it was the argc issue, but hadn't had the time to test a change.

jeff