[fpc-devel] fpc trunk / parentfp for debugger / missing

[Jonas Maebe]

On 20/06/2020 14:31, Yuriy Sydorov wrote:
> On 20.06.2020 14:38, Jonas Maebe wrote:
>> On 20/06/2020 13:15, Yuriy Sydorov wrote:
>>> On 20.06.2020 2:04, Martin wrote:
>>>> I just updated to fpc trunk 45658
>>>>
>>>> It seems sometime in the last 3 or 4 month a change was made that
>>>> leads to "parentfp" being optimized away.
>>>> Even with -O- or -O1 (many users do O1 for debugging)
>>>
>>> I've turned off optimization of parentfp when -O- in r45661.
>>
>> Maybe it can be tied to the -Oostackframe optimisation setting.
> 
> Some CPU targets - jvm at least - doesn't support cs_opt_stackframe, but
> the parentfp optimization applies for any CPU target.

At first sight, the only thing that needs to be done to "support"
cs_opt_stackframe for the JVM target is to always set
pi_has_stackparameter there.

> The parentfp optimization need to be tied to some generic optimization.
> cs_opt_remove_empty_proc looks good for this.

That feels rather unrelated to me.


Jonas