[PATCH] IPA-CP release transformation summary (PR jit/91928)

[Andrea Corallo]

Jeff Law writes:

> On 10/3/19 6:47 AM, Andrea Corallo wrote:
>>
>> Jeff Law writes:
>>
>>> On 10/1/19 4:11 AM, Andrea Corallo wrote:
>>>> Martin Jambor writes:
>>>>
>>>>> Hi,
>>>>>
>>>>> On Mon, Sep 30 2019, Andrea Corallo wrote:
>>>>>> Hi all,
>>>>>> I'd like to submit this patch.
>>>>>> It release the ipa cp transformation summary after functions being expanded.
>>>>>> This is to fix the compiler when used with libgccjit on subsequent
>>>>>> compilations (every new compilation should have a clean transformation
>>>>>> summary).
>>>>> if this is a general problem then I think we should instead add another
>>>>> hook to class ipa_opt_pass_d to free transformation summary, call it for
>>>>> all IPA passes at the appropriate time and implement it for IPA-CP. That
>>>>> way it will work for all IPA passes which might have a transformation
>>>>> summary.
>>>>>
>>>>> Martin
>>>>>
>>>>>
>>>>>> Bootstrap on arm64 and X86-64.
>>>>>>
>>>>>> Bests
>>>>>>   Andrea
>>>>>>
>>>>>> gcc/ChangeLog
>>>>>> 2019-??-??  Andrea Corallo  <andrea.corallo@arm.com>
>>>>>>
>>>>>> 	* cgraphunit.c (expand_all_functions): Release ipcp_transformation_sum
>>>>>> 	when finished.
>>>>>> 	* ipa-prop.c (ipcp_free_transformation_sum): New function.
>>>>>> 	* ipa-prop.h (ipcp_free_transformation_sum): Add declaration.
>>>> Hi,
>>>> actually looking around in order to implement the suggestions I realized
>>>> that already some code was put in place in toplev::finalize calling
>>>> then ipa_cp_c_finalize exactly for this purpose.
>>>>
>>>> I've updated the patch accordingly.
>>>>
>>>> Bootstraped on aarch64.
>>>>
>>>> Is it okay for trunk?
>>>>
>>>> Bests
>>>>   Andrea
>>>>
>>>> gcc/ChangeLog
>>>> 2019-??-??  Andrea Corallo  <andrea.corallo@arm.com>
>>>>
>>>> 	* ipa-cp.c (ipa_cp_c_finalize): Release ipcp_transformation_sum.
>>>> 	* ipa-prop.c (ipcp_free_transformation_sum): New function.
>>>> 	* ipa-prop.h (ipcp_free_transformation_sum): Add declaration.
>>> OK for the trunk.
>>>
>>> jeff
>>
>> Applied as r276507.
>>
>> The same patch applies cleanly onto gcc-9-branch, I think would be good to
>> back port it cause libgccjit is not very usable without.
>> Should we back port it?
> It's a bit out of the scope of what we usually backport, but I think
> this is a reasonable exception.  So, yea, if you want, go ahead.
>
> Thanks
> jeff

Thanks,
committed as r276625.

Bests
  Andrea