[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 6 commits: Replace `SizedSeq` with `FlatBag` for flattened structure

[Marge Bot (@marge-bot)]

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


Commits:
5f085d3a by Fendor at 2024-04-04T14:47:33-04:00
Replace `SizedSeq` with `FlatBag` for flattened structure

LinkedLists are notoriously memory ineffiecient when all we do is
traversing a structure.
As 'UnlinkedBCO' has been identified as a data structure that impacts
the overall memory usage of GHCi sessions, we avoid linked lists and
prefer flattened structure for storing.

We introduce a new memory efficient representation of sequential
elements that has special support for the cases:

* Empty
* Singleton
* Tuple Elements

This improves sharing in the 'Empty' case and avoids the overhead of
'Array' until its constant overhead is justified.

- - - - -
82cfe10c by Fendor at 2024-04-04T14:47:33-04:00
Compact FlatBag array representation

`Array` contains three additional `Word`'s we do not need in `FlatBag`. Move
`FlatBag` to `SmallArray`.

Expand the API of SmallArray by `sizeofSmallArray` and add common
traversal functions, such as `mapSmallArray` and `foldMapSmallArray`.
Additionally, allow users to force the elements of a `SmallArray`
via `rnfSmallArray`.

- - - - -
36a75b80 by Andrei Borzenkov at 2024-04-04T14:48:10-04:00
Change how invisible patterns represented in  haskell syntax and TH AST (#24557)

Before this patch:
  data ArgPat p
    = InvisPat (LHsType p)
    | VisPat (LPat p)

With this patch:
  data Pat p
    = ...
    | InvisPat (LHsType p)
    ...

And the same transformation in the TH land. The rest of the
changes is just updating code to handle new AST and writing tests
to check if it is possible to create invalid states using TH.

Metric Increase:
    MultiLayerModulesTH_OneShot

- - - - -
28009fbc by Matthew Pickering at 2024-04-04T14:48:46-04:00
Fix off by one error in seekBinNoExpand and seekBin

- - - - -
367b9b71 by Ben Gamari at 2024-04-04T15:19:35-04:00
compiler: Allow more types in GHCForeignImportPrim

For many, many years `GHCForeignImportPrim` has suffered from the rather
restrictive limitation of not allowing any non-trivial types in arguments
or results. This limitation was justified by the code generator allegely
barfing in the presence of such types.

However, this restriction appears to originate well before the NCG
rewrite and the new NCG does not appear to have any trouble with such
types (see the added `T24598` test). Lift this restriction.

Fixes #24598.

- - - - -
94543adb by Alan Zimmerman at 2024-04-04T15:19:36-04:00
EPA: Use EpaLocation not SrcSpan in ForeignDecls

This allows us to update them for makeDeltaAst in ghc-exactprint

- - - - -


30 changed files:

- compiler/GHC/Builtin/Names/TH.hs
- compiler/GHC/ByteCode/Asm.hs
- compiler/GHC/ByteCode/Linker.hs
- compiler/GHC/ByteCode/Types.hs
- + compiler/GHC/Data/FlatBag.hs
- compiler/GHC/Data/SmallArray.hs
- compiler/GHC/Hs/Decls.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/Instances.hs
- compiler/GHC/Hs/Pat.hs
- compiler/GHC/Hs/Syn/Type.hs
- compiler/GHC/Hs/Utils.hs
- compiler/GHC/HsToCore/Arrows.hs
- compiler/GHC/HsToCore/Expr.hs
- compiler/GHC/HsToCore/Match.hs
- compiler/GHC/HsToCore/Pmc/Desugar.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/HsToCore/Ticks.hs
- compiler/GHC/HsToCore/Utils.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Iface/Ext/Utils.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Annotation.hs
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Rename/Bind.hs
- compiler/GHC/Rename/Expr.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/Rename/Pat.hs
- compiler/GHC/Rename/Utils.hs
- compiler/GHC/Tc/Deriv/Functor.hs


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/fc6495586eeac7f975db9219a861119561c235ad...94543adb99830343aa651973697a36342450cee5

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/fc6495586eeac7f975db9219a861119561c235ad...94543adb99830343aa651973697a36342450cee5
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