> On Apr 27, 2021, at 1:30 AM, Richard Biener <rguent...@suse.de> wrote:
>
>>
>> equivalent in all respects. And if we were trying to make them
>> equivalent, we'd need to do much more than this.
>>
>> The same applies to the pattern case. If “x” is initialised to a pattern
>> that happens to point to a real decl, we don't have to preserve the
>> order of accesses to the decl wrt accesses to “*x” (especially since
>> we're hoping that “*x” will trap).
>>
>> I think for aliasing purposes, the .DEFERRED_INIT return value is still
>> analogous to an undefined SSA name, even though we will later generate
>> code to initialise it.
>
> (only replying to this part, I'll look at the next revised patch series)
Okay, thanks.
>
> Since .DEFERRED_INIT does not produce any pointers and is not a real
> initialization you don't need to do anything in PTA - but you might
> want to ignore it to not pessimize it by the default handling. Thus
>
> + if (gimple_call_internal_p (t, IFN_DEFERRED_INIT))
> + {
> + find_func_aliases_for_deferred_init (t);
> + return;
> + }
>
> should simply return and find_func_aliases_for_deferred_init can be
> removed.
Okay. Will do that.
thanks.
Qing
