[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 4 commits: Division by constants optimization

[Marge Bot (@marge-bot)]

Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC


Commits:
daff1e30 by Jannis at 2024-05-12T13:38:35-04:00
Division by constants optimization

- - - - -
413217ba by Andreas Klebinger at 2024-05-12T13:39:11-04:00
Tidy: Add flag to expose unfoldings if they take dictionary arguments.

Add the flag `-fexpose-overloaded-unfoldings` to be able to control this
behaviour.

For ghc's boot libraries file size grew by less than 1% when it was
enabled. However I refrained from enabling it by default for now.

I've also added a section on specialization more broadly to the users
guide.

-------------------------
Metric Decrease:
    MultiLayerModulesTH_OneShot
Metric Increase:
    T12425
    T13386
    hard_hole_fits
-------------------------

- - - - -
366427dd by Zubin Duggal at 2024-05-13T09:48:25-04:00
Don't store a GlobalRdrEnv in `mi_globals` for GHCi.

GHCi only needs the `mi_globals` field for modules imported with
:module +*SomeModule.

It uses this field to make the top level environment in `SomeModule` available
to the repl.

By default, only the first target in the command line parameters is
"star" loaded into GHCi. Other modules have to be manually "star" loaded
into the repl.

Storing the top level GlobalRdrEnv for each module is very wasteful, especially
given that we will most likely never need most of these environments.

Instead we store only the information needed to reconstruct the top level environment
in a module, which is the `IfaceTopEnv` data structure, consisting of all import statements
as well as all top level symbols defined in the module (not taking export lists into account)

When a particular module is "star-loaded" into GHCi (as the first commandline target, or via
an explicit `:module +*SomeModule`, we reconstruct the top level environment on demand using
the `IfaceTopEnv`.

- - - - -
2e0c7613 by Andrei Borzenkov at 2024-05-13T09:48:27-04:00
Improve pattern to type pattern transformation (23739)

`pat_to_type_pat` function now can handle more patterns:
  - TuplePat
  - ListPat
  - LitPat
  - NPat
  - ConPat

Allowing these new constructors in type patterns significantly
increases possible shapes of type patterns without `type` keyword.

This patch also changes how lookups in `lookupOccRnConstr` are
performed, because we need to fall back into
types when we didn't find a constructor on data level to perform
`ConPat` to type transformation properly.

- - - - -


30 changed files:

- compiler/GHC.hs
- compiler/GHC/Cmm/Config.hs
- compiler/GHC/Cmm/MachOp.hs
- compiler/GHC/Cmm/Opt.hs
- compiler/GHC/Cmm/Pipeline.hs
- compiler/GHC/Cmm/Sink.hs
- compiler/GHC/Driver/Backend.hs
- compiler/GHC/Driver/Config/Cmm.hs
- compiler/GHC/Driver/Config/Tidy.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Main.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/Iface/Make.hs
- compiler/GHC/Iface/Syntax.hs
- compiler/GHC/Iface/Tidy.hs
- compiler/GHC/IfaceToCore.hs
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Rename/Names.hs
- compiler/GHC/Rename/Pat.hs
- compiler/GHC/Runtime/Eval.hs
- compiler/GHC/Runtime/Loader.hs
- compiler/GHC/StgToCmm/Prim.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Head.hs
- compiler/GHC/Tc/Gen/HsType.hs
- compiler/GHC/Tc/Gen/Pat.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Tc/Types.hs
- compiler/GHC/Tc/Utils/Backpack.hs


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/ea8ff38f34d7f3437b6bbe899742496420699dc2...2e0c7613fabd7521f13222b9a8ef942b530f16c5

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/ea8ff38f34d7f3437b6bbe899742496420699dc2...2e0c7613fabd7521f13222b9a8ef942b530f16c5
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