[llvm-dev] [RFC] Expanding the scope of ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER

[Arthur Eubanks via llvm-dev]

https://reviews.llvm.org/D92433 for an example of changing LTO pass manager
defaults (not ready to submit yet, need to fix a couple things first)

On Tue, Dec 1, 2020 at 12:34 PM Arthur Eubanks <aeubanks at google.com> wrote:

> The ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER CMake flag currently only affects
> Clang. It should probably also change all other uses of pass managers where
> possible.
>
> There are a couple of uses inside LLD for LTO which already have
> new/legacy PM flags and should probably look at
> ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER to determine the default. Some
> <https://github.com/llvm/llvm-project/blob/1314a4938fba865412598b7227cb4657d59cd8bc/lld/wasm/Driver.cpp#L382>
> examples
> <https://github.com/llvm/llvm-project/blob/1314a4938fba865412598b7227cb4657d59cd8bc/llvm/include/llvm/LTO/Config.h#L53>
> .
>
> Also at some point in the future when check-llvm has been fixed to work
> with opt's -enable-new-pm flag by default, that should also be dependent
> upon ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER.
>
> Any objections?
>
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