That's what I roughly thought.
Thank you very much for your explanation.
On Tue, Aug 30, 2022 at 7:05 AM Jakob Kummerow <jkumme...@chromium.org>
wrote:
> On Tue, Aug 30, 2022 at 3:37 PM Terrence Lim <heuichan....@gmail.com>
> wrote:
>
>> Hi Jakob,
>>
>> I came across a follow-up question regarding the optimization phases.
>> What would happen (assume that we can) if we forcefully disable the
>> mandatory phases, e.g., SimplifiedLowering?
>> Will the JIT compiler fail (crash) during the compilation?
>>
>
> Yes.
>
> Think of the different IR levels as different languages. They need to be
> translated ("lowered") into each other, and that chain must be complete.
> The translation steps in the middle are just as essential as translating
> from the input format to a high-level IR graph at the beginning, and
> translating from a low-level IR graph to machine code at the very end.
>
>
>>
>> Thanks! Regards
>>
>> On Fri, Aug 26, 2022 at 1:58 AM Jakob Kummerow <jkumme...@chromium.org>
>> wrote:
>>
>>> No, some Turbofan passes cannot be disabled, because they are required.
>>> SimplifiedLowering is a great example -- it changes ("lowers") the graph to
>>> the format that subsequent passes require.
>>>
>>>
>>> On Fri, Aug 26, 2022 at 4:18 AM TL <heuichan....@gmail.com> wrote:
>>>
>>>> I am curious whether there are any options for the 'd8' to disable
>>>> specific TurboFan
>>>> optimizations, e.g., simplified-lowering, type-lowering, etc, for *all* the
>>>> optimization
>>>> options or not. I know there are options for some optimizations, such as
>>>> escape-analysis, loop-peeling, etc. But, can we have control of "all"
>>>> the optimizations
>>>> without actually modifying the v8 source code?
>>>>
>>>> --
>>>> --
>>>
>>> --
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--
HeuiChan (Terrence) Lim
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Computer Science
The University of Arizona
Profile Page: terrencejlim.com <http://www.terrencejlim.com>
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