[llvm-dev] OptBisect implementation for new pass manager

[Fedor Sergeev via llvm-dev]

On 09/26/2018 08:57 PM, Philip Pfaffe wrote:
> Well, I think we don't have a clear idea about new-PM codegen should 
> work in general. Is this really something that concerns us right now?
I dont believe it has anything to do specifically with New-PM.
It is just a property of getting a "real code".
There are passes that you cant skip if you want to get down to the 
runnable code.

regards,
   Fedor.

>
> Philip
>
> On Wed, Sep 26, 2018 at 7:54 PM Friedman, Eli <efriedma at codeaurora.org 
> <mailto:efriedma at codeaurora.org>> wrote:
>
>     On 9/26/2018 10:47 AM, Philip Pfaffe via llvm-dev wrote:
>     > Hi Fedor,
>     >
>     > can you make an example where a pass actually needs to opt-out?
>     > Because IMO, bisect should quite literally to DebugCounter-style
>     skip
>     > every step in every ::run method's loop. Passes should not even be
>     > concerned with this.
>
>     This isn't so much an issue for the optimization pipeline, but code
>     generation involves some passes which are mandatory (e.g. isel).
>
>     -Eli
>
>     -- 
>     Employee of Qualcomm Innovation Center, Inc.
>     Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
>     a Linux Foundation Collaborative Project
>

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