[llvm-dev] Pass reduction with new PM

[David Blaikie via llvm-dev]

+Arthur for more NPM context

On Fri, Jul 30, 2021 at 12:25 AM Markus Lavin via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi,
>
>
>
> Right now I am trying to analyze a bug that appears with new PM pipeline
> as follows
>
>
>
> $ opt -enable-new-pm=1 -disable-basic-aa -tbaa -O1 -o /dev/null reduced.ll
>
>
>
> the crashing pass is LICM but simply exporting IR before that pass and
> then running just that pass does not seem to capture enough state to
> reproduce the problem.
>
>
>
> So here one would either want bugpoint to help automatically reduce the
> pass list or simply use -debug-pass=Arguments and do it manually but as I
> understand it neither of those options work with the new PM.
>
>
>
> This has already been brought up in [llvm-dev] How to get from "opt -O3"
> to "opt <a-single-pass>" with the new PM?
> <https://lists.llvm.org/pipermail/llvm-dev/2021-March/148994.html>
>
> Has there been any progress since then?
>
>
>
> br
>
> Markus
>
>
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