[PATCH] Fix PR103028

[Jeff Law]

On 11/5/2021 4:19 AM, Andreas Krebbel via Gcc-patches wrote:
> This prevents find_cond_trap from being invoked after reload.  It may
> generate compares which would require reloading.
>
> Bootstrapped and regression tested on s390x.
>
> Ok for mainline?
>
> gcc/ChangeLog:
>
> 	PR rtl-optimization/103028
> 	* ifcvt.c (find_if_header): Invoke find_cond_trap only before
> 	reload.
>
> gcc/testsuite/ChangeLog:
>
> 	PR rtl-optimization/103028
> 	* gcc.dg/pr103028.c: New test.
Shouldn't this be handled by the target by rejecting creating the trap 
after reload has completed since the target seems to need new pseudos to 
generate a conditional trap?  Otherwise we're penalizing targets which 
don't need new pseudos to generate conditional traps.





jeff