[Bug rtl-optimization/58517] ifcvt (after combine) puts ccreg clobbering insn between ccset insn and ccreg use

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58517

--- Comment #11 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #9)
> The reason why r6-3654-g6b7e867187889 didn't fix this case is because it was
> not looking into clobbers only the set side. 
> 
> Note the conditional in my patch should have been
> if (reg_overlap_mentioned_p (DF_REF_REG (def), cond))
> 
> Maybe it should be bb_valid_for_noce_process_p instead, I am not 100% sure
> on that.

This does not fix the issue as (In reply to Andrew Pinski from comment #9)
> The reason why r6-3654-g6b7e867187889 didn't fix this case is because it was
> not looking into clobbers only the set side. 
> 
> Note the conditional in my patch should have been
> if (reg_overlap_mentioned_p (DF_REF_REG (def), cond))
> 
> Maybe it should be bb_valid_for_noce_process_p instead, I am not 100% sure
> on that.

This patch is not enough. Though the patch in comment #4 is not enough any more
either.