[llvm-dev] registering passes at the beginning/end of opt passes (new pass manager)

[Juneyoung Lee via llvm-dev]

Wow, I should use the rewriter when the migration happens.
Thanks for the info!

On Wed, Dec 9, 2020 at 8:03 AM Arthur Eubanks <aeubanks at google.com> wrote:

> Currently there isn't such a rewriter. Although I may want to create one
> so we can mass migrate tests to use the `-passes=` form after the NPM
> switch.
>
> On Mon, Dec 7, 2020 at 4:33 PM Juneyoung Lee <juneyoung.lee at sf.snu.ac.kr>
> wrote:
>
>> Is there a rewriter tool that converts input passes into a string with
>> full adaptor stacks?
>>
>> It seems manually updating existing tests' passes to have full adaptor
>> stack is a tricky job; it would be great if there is an automatic way of
>> doing that.
>>
>> Thanks,
>> Juneyoung
>>
>>
>> On Tue, Dec 8, 2020 at 3:36 AM Arthur Eubanks <aeubanks at google.com>
>> wrote:
>>
>>> You could always specify the full adaptor stack for loop passes, e.g.
>>> "module(function(loop(unswitch<nontrivial>)))".
>>>
>>> Another option is to register your passes via the flags mentioned above
>>> and run default<O0>, which should invoke all the registered callbacks.
>>>
>>> On Mon, Dec 7, 2020 at 2:47 AM Juneyoung Lee via llvm-dev <
>>> llvm-dev at lists.llvm.org> wrote:
>>>
>>>> Okay, I tried something like this:
>>>>
>>>> Given opt -passes='...', my bash script strips the quotes, puts
>>>> module(mypass) at the begin/end, put quotes again, and runs it. mypass is a
>>>> module-level pass.
>>>>
>>>> ex) Given opt -passes='sroa' , it emits opt
>>>> -passes='module(mypass),sroa,module(mypass)'
>>>>
>>>> The emitted command seems working in this case, but I found that it
>>>> breaks when loop-level passes are there:
>>>>
>>>> ex) Running opt
>>>> -passes='module(mypass),loop(unswitch<nontrivial>),module(mypass)'
>>>>  shows:
>>>> build/bin/opt: invalid use of 'loop' pass as module pipeline
>>>>
>>>>
>>>> Is there a way to correctly add 'mypass' to the begin/end of the passes
>>>> regardless of the level of the pipeline?
>>>>
>>>> Thanks,
>>>> Juneyoung
>>>>
>>>> On Fri, Dec 4, 2020 at 1:28 PM Juneyoung Lee <
>>>> juneyoung.lee at sf.snu.ac.kr> wrote:
>>>>
>>>>> Hello all,
>>>>>
>>>>> Can I register passes at the beginning/end of opt passes (new pass
>>>>> manager)?
>>>>>
>>>>> I found that
>>>>> registerPipelineStartEPCallback/registerOptimizerLastEPCallback work
>>>>> successfully for clang, but they don't fire when opt -passes="" is used.
>>>>>
>>>>> Thanks,
>>>>> Juneyoung
>>>>>
>>>>>
>>>>
>>>> --
>>>>
>>>> Juneyoung Lee
>>>> Software Foundation Lab, Seoul National University
>>>> _______________________________________________
>>>> LLVM Developers mailing list
>>>> llvm-dev at lists.llvm.org
>>>> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>>>
>>>
>>
>> --
>>
>> Juneyoung Lee
>> Software Foundation Lab, Seoul National University
>>
>

-- 

Juneyoung Lee
Software Foundation Lab, Seoul National University
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