[Git][ghc/ghc][wip/T22872] 92 commits: Add `Data.Functor.unzip`

Thu Mar 23 20:14:01 UTC 2023

Ben Gamari pushed to branch wip/T22872 at Glasgow Haskell Compiler / GHC

Commits:
fa559c28 by Ollie Charles at 2023-03-07T20:56:21+00:00
Add `Data.Functor.unzip`

This function is currently present in `Data.List.NonEmpty`, but `Data.Functor`
is a better home for it. This change was discussed and approved by the CLC
at https://github.com/haskell/core-libraries-committee/issues/88.

- - - - -
2aa07708 by MorrowM at 2023-03-07T21:22:22-05:00
Fix documentation for traceWith and friends

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f3ff7cb1 by David Binder at 2023-03-08T01:24:17-05:00
Remove utils/hpc subdirectory and its contents

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cf98e286 by David Binder at 2023-03-08T01:24:17-05:00
Add git submodule for utils/hpc

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605fbbb2 by David Binder at 2023-03-08T01:24:18-05:00
Update commit for utils/hpc git submodule

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606793d4 by David Binder at 2023-03-08T01:24:18-05:00
Update commit for utils/hpc git submodule

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4158722a by Sylvain Henry at 2023-03-08T01:24:58-05:00
linker: fix linking with aligned sections (#23066)

Take section alignment into account instead of assuming 16 bytes (which
is wrong when the section requires 32 bytes, cf #23066).

- - - - -
1e0d8fdb by Greg Steuck at 2023-03-08T08:59:05-05:00
Change hostSupportsRPaths to report False on OpenBSD

OpenBSD does support -rpath but ghc build process relies on some
related features that don't work there. See ghc/ghc#23011

- - - - -
bed3a292 by Alexis King at 2023-03-08T08:59:53-05:00
bytecode: Fix bitmaps for BCOs used to tag tuples and prim call args

fixes #23068

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321d46d9 by Ben Gamari at 2023-03-08T15:02:30-05:00
rts: Drop redundant prototype

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abb6070f by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Fix style

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be278901 by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Deduplicate assertion

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b9034639 by Ben Gamari at 2023-03-08T15:02:30-05:00
rts: Fix type issues in Sparks.h

Adds explicit casts to satisfy a C++ compiler.

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da7b2b94 by Ben Gamari at 2023-03-08T15:02:30-05:00
rts: Use release ordering when storing thread labels

Since this makes the ByteArray# visible from other cores.

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5b7f6576 by Ben Gamari at 2023-03-08T15:02:30-05:00
rts/BlockAlloc: Allow disabling of internal assertions

These can be quite expensive and it is sometimes useful to compile a
DEBUG RTS without them.

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6283144f by Ben Gamari at 2023-03-08T15:02:30-05:00
rts/Sanity: Mark pinned_object_blocks

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9b528404 by Ben Gamari at 2023-03-08T15:02:30-05:00
rts/Sanity: Look at nonmoving saved_filled lists

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0edc5438 by Ben Gamari at 2023-03-08T15:02:30-05:00
Evac: Squash data race in eval_selector_chain

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7eab831a by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Clarify implementation

This makes the intent of this implementation a bit clearer.

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532262b9 by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Clarify comment

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bd9cd84b by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Add missing no-op in busy-wait loop

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c4e6bfc8 by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Don't push empty arrays to update remembered set

Previously the write barrier of resizeSmallArray# incorrectly handled
resizing of zero-sized arrays, pushing an invalid pointer to the update
remembered set.

Fixes #22931.

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92227b60 by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Fix handling of weak pointers

This fixes an interaction between aging and weak pointer handling which
prevented the finalization of some weak pointers. In particular, weak
pointers could have their keys incorrectly marked by the preparatory
collector, preventing their finalization by the subsequent concurrent
collection.

While in the area, we also significantly improve the assertions
regarding weak pointers.

Fixes #22327.

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ba7e7972 by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Sanity check nonmoving large objects and compacts

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71b038a1 by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Sanity check mutable list

Assert that entries in the nonmoving generation's generational
remembered set (a.k.a. mutable list) live in nonmoving generation.

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99d144d5 by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Don't show occupancy if we didn't collect live words

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81d6cc55 by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Fix tracking of FILLED_SWEEPING segments

Previously we only updated the state of the segment at the head of each
allocator's filled list.

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58e53bc4 by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Assert state of swept segments

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2db92e01 by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Handle new closures in nonmovingIsNowAlive

We must conservatively assume that new closures are reachable since we
are not guaranteed to mark such blocks.

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e4c3249f by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Don't clobber update rem sets of old capabilities

Previously `storageAddCapabilities` (called by `setNumCapabilities`) would
clobber the update remembered sets of existing capabilities when
increasing the capability count. Fix this by only initializing the
update remembered sets of the newly-created capabilities.

Fixes #22927.

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1b069671 by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Add missing write barriers in selector optimisation

This fixes the selector optimisation, adding a few write barriers which
are necessary for soundness. See the inline comments for details.

Fixes #22930.

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d4032690 by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Post-sweep sanity checking

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0baa8752 by Ben Gamari at 2023-03-08T15:02:30-05:00
nonmoving: Avoid n_caps race

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5d3232ba by Ben Gamari at 2023-03-08T15:02:31-05:00
nonmoving: Don't push if nonmoving collector isn't enabled

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0a7eb0aa by Ben Gamari at 2023-03-08T15:02:31-05:00
nonmoving: Be more paranoid in segment tracking

Previously we left various segment link pointers dangling. None of this
wrong per se, but it did make it harder than necessary to debug.

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7c817c0a by Ben Gamari at 2023-03-08T15:02:31-05:00
nonmoving: Sync-phase mark budgeting

Here we significantly improve the bound on sync phase pause times by
imposing a limit on the amount of work that we can perform during the
sync. If we find that we have exceeded our marking budget then we allow
the mutators to resume, return to concurrent marking, and try
synchronizing again later.

Fixes #22929.

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ce22a3e2 by Ben Gamari at 2023-03-08T15:02:31-05:00
nonmoving: Allow pinned gen0 objects to be WEAK keys

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78746906 by Ben Gamari at 2023-03-08T15:02:31-05:00
rts: Reenable assertion

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b500867a by Ben Gamari at 2023-03-08T15:02:31-05:00
nonmoving: Move current segment array into Capability

The current segments are conceptually owned by the mutator, not the
collector. Consequently, it was quite tricky to prove that the mutator
would not race with the collect due to this shared state. It turns out
that such races are possible: when resizing the current segment array
we may concurrently try to take a heap census. This will attempt to walk
the current segment array, causing a data race.

Fix this by moving the current segment array into `Capability`, where it
belongs.

Fixes #22926.

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56e669c1 by Ben Gamari at 2023-03-08T15:02:31-05:00
nonmoving: Fix Note references

Some references to Note [Deadlock detection under the non-moving
collector] were missing an article.

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4a7650d7 by Ben Gamari at 2023-03-08T15:02:31-05:00
rts/Sanity: Fix block count assertion with non-moving collector

The nonmoving collector does not use `oldest_gen->blocks` to track its
block list. However, it nevertheless updates `oldest_gen->n_blocks` to
ensure that its size is accounted for by the storage manager.
Consequently, we must not attempt to assert consistency between the two.

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96a5aaed by Ben Gamari at 2023-03-08T15:02:31-05:00
nonmoving: Don't call prepareUnloadCheck

When the nonmoving GC is in use we do not call `checkUnload` (since we
don't unload code) and therefore should not call `prepareUnloadCheck`,
lest we run into assertions.

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6c6674ca by Ben Gamari at 2023-03-08T15:02:31-05:00
rts: Encapsulate block allocator spinlock

This makes it a bit easier to add instrumentation on this spinlock
while debugging.

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e84f7167 by Ben Gamari at 2023-03-08T15:02:31-05:00
testsuite: Skip some tests when sanity checking is enabled

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3ae0f368 by Ben Gamari at 2023-03-08T15:02:31-05:00
nonmoving: Fix unregisterised build

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4eb9d06b by Ben Gamari at 2023-03-08T15:02:31-05:00
nonmoving: Ensure that sanity checker accounts for saved_filled segments

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f0cf384d by Ben Gamari at 2023-03-08T15:02:31-05:00
hadrian: Add +boot_nonmoving_gc flavour transformer

For using GHC bootstrapping to validate the non-moving GC.

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581e58ac by Ben Gamari at 2023-03-08T15:02:31-05:00
gitlab-ci: Add job bootstrapping with nonmoving GC

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487a8b58 by Ben Gamari at 2023-03-08T15:02:31-05:00
nonmoving: Move allocator into new source file

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8f374139 by Ben Gamari at 2023-03-08T15:02:31-05:00
nonmoving: Split out nonmovingAllocateGC

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662b6166 by Ben Gamari at 2023-03-08T15:02:31-05:00
testsuite: Only run T22795* in the normal way

It doesn't make sense to run these in multiple ways as they merely test
whether `-threaded`/`-single-threaded` flags.

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0af21dfa by Ben Gamari at 2023-03-08T15:02:31-05:00
rts: Rename clear_segment(_free_blocks)?

To reflect the fact that these are to do with the nonmoving collector,
now since they are exposed no longer static.

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7bcb192b by Ben Gamari at 2023-03-08T15:02:31-05:00
rts: Fix incorrect STATIC_INLINE

This should be INLINE_HEADER lest we get unused declaration warnings.

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f1fd3ffb by Ben Gamari at 2023-03-08T15:02:31-05:00
testsuite: Mark ffi023 as broken due to #23089

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a57f12b3 by Ben Gamari at 2023-03-08T15:02:31-05:00
testsuite: Skip T7160 in the nonmoving way

Finalization order is different under the nonmoving collector.

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f6f12a36 by Ben Gamari at 2023-03-08T15:02:31-05:00
rts: Capture GC configuration in a struct

The number of distinct arguments passed to GarbageCollect was getting a
bit out of hand.

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ba73a807 by Ben Gamari at 2023-03-08T15:02:31-05:00
nonmoving: Non-concurrent collection

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7c813d06 by Alexis King at 2023-03-08T15:03:10-05:00
hadrian: Fix flavour compiler stage options off-by-one error

!9193 pointed out that ghcDebugAssertions was supposed to be a predicate
on the stage of the built compiler, but in practice it was a predicate
on the stage of the compiler used to build. Unfortunately, while it
fixed that issue for ghcDebugAssertions, it documented every other
similar option as behaving the same way when in fact they all used the
old behavior.

The new behavior of ghcDebugAssertions seems more intuitive, so this
commit changes the interpretation of every other option to match. It
also improves the enableProfiledGhc and debugGhc flavour transformers by
making them more selective about which stages in which they build
additional library/RTS ways.

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f97c7f6d by Luite Stegeman at 2023-03-09T09:52:09-05:00
Delete created temporary subdirectories at end of session.

This patch adds temporary subdirectories to the list of
paths do clean up at the end of the GHC session. This
fixes warnings about non-empty temporary directories.

Fixes #22952

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9ea719f2 by Apoorv Ingle at 2023-03-09T09:52:45-05:00
Fixes #19627.

Previously the solver failed with an unhelpful "solver reached too may iterations" error.
With the fix for #21909 in place we no longer have the possibility of generating such an error if we have `-fconstraint-solver-iteration` > `-fgivens-fuel > `-fwanteds-fuel`. This is true by default, and the said fix also gives programmers a knob to control how hard the solver should try before giving up.

This commit adds:
* Reference to ticket #19627 in the Note [Expanding Recursive Superclasses and ExpansionFuel]
* Test `typecheck/should_fail/T19627.hs` for regression purposes

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ec2d93eb by Sebastian Graf at 2023-03-10T10:18:54-05:00
DmdAnal: Fix a panic on OPAQUE and trivial/PAP RHS (#22997)

We should not panic in `add_demands` (now `set_lam_dmds`), because that code
path is legimitely taken for OPAQUE PAP bindings, as in T22997.

Fixes #22997.

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5b4628ae by Sylvain Henry at 2023-03-10T10:19:34-05:00
JS: remove dead code for old integer-gmp

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bab23279 by Josh Meredith at 2023-03-10T23:24:49-05:00
JS: Fix implementation of MK_JSVAL

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ec263a59 by Sebastian Graf at 2023-03-10T23:25:25-05:00
Simplify: Move `wantEtaExpansion` before expensive `do_eta_expand` check

There is no need to run arity analysis and what not if we are not in a
Simplifier phase that eta-expands or if we don't want to eta-expand the
expression in the first place.

Purely a refactoring with the goal of improving compiler perf.

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047e9d4f by Josh Meredith at 2023-03-13T03:56:03+00:00
JS: fix implementation of forceBool to use JS backend syntax

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559a4804 by Sebastian Graf at 2023-03-13T07:31:23-04:00
Simplifier: `countValArgs` should not count Type args (#23102)

I observed miscompilations while working on !10088 caused by this.

Fixes #23102.

Metric Decrease:
    T10421

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536d1f90 by Matthew Pickering at 2023-03-13T14:04:49+00:00
Bump Win32 to 2.13.4.0

Updates Win32 submodule

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ee17001e by Ben Gamari at 2023-03-13T21:18:24-04:00
ghc-bignum: Drop redundant include-dirs field
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c9c26cd6 by Teo Camarasu at 2023-03-16T12:17:50-04:00
Fix BCO creation setting caps when -j > -N

* Remove calls to 'setNumCapabilities' in 'createBCOs'
These calls exist to ensure that 'createBCOs' can benefit from
parallelism. But this is not the right place to call
`setNumCapabilities`. Furthermore the logic differs from that in the
driver causing the capability count to be raised and lowered at each TH
call if -j > -N.

* Remove 'BCOOpts'
No longer needed as it was only used to thread the job count down to `createBCOs`

Resolves #23049

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5ddbf5ed by Teo Camarasu at 2023-03-16T12:17:50-04:00
Add changelog entry for #23049

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6e3ce9a4 by Ben Gamari at 2023-03-16T12:18:26-04:00
configure: Fix FIND_CXX_STD_LIB test on Darwin

Annoyingly, Darwin's <cstddef> includes <version> and APFS is
case-insensitive. Consequently, it will end up #including the
`VERSION` file generated by the `configure` script on the second
and subsequent runs of the `configure` script.

See #23116.
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19d6d039 by sheaf at 2023-03-16T21:31:22+01:00
ghci: only keep the GlobalRdrEnv in ModInfo

The datatype GHC.UI.Info.ModInfo used to store a ModuleInfo,
which includes a TypeEnv. This can easily cause space leaks as we
have no way of forcing everything in a type environment.

In GHC, we only use the GlobalRdrEnv, which we can force completely.
So we only store that instead of a fully-fledged ModuleInfo.

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73d07c6e by Torsten Schmits at 2023-03-17T14:36:49-04:00
Add structured error messages for GHC.Tc.Utils.Backpack

Tracking ticket: #20119

MR: !10127

This converts uses of `mkTcRnUnknownMessage` to newly added constructors
of `TcRnMessage`.
One occurrence, when handing a nested error from the interface loading
machinery, was omitted. It will be handled by a subsequent changeset
that addresses interface errors.

- - - - -
a13affce by Andrei Borzenkov at 2023-03-21T11:17:17-04:00
Rename () into Unit, (,,...,,) into Tuple<n> (#21294)

This patch implements a part of GHC Proposal #475.
The key change is in GHC.Tuple.Prim:

  - data () = ()
  - data (a,b) = (a,b)
  - data (a,b,c) = (a,b,c)
  ...
  + data Unit = ()
  + data Tuple2 a b = (a,b)
  + data Tuple3 a b c = (a,b,c)
  ...

And the rest of the patch makes sure that Unit and Tuple<n>
are pretty-printed as () and (,,...,,) in various contexts.

Updates the haddock submodule.

Co-authored-by: Vladislav Zavialov <vlad.z.4096 at gmail.com>

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23642bf6 by Adam Sandberg Ericsson at 2023-03-21T11:17:53-04:00
docs: fix some wrongs in the eventlog format documentation

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90159773 by Adam Sandberg Ericsson at 2023-03-21T11:17:53-04:00
docs: explain the BLOCK_MARKER event

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ab1c25e8 by Adam Sandberg Ericsson at 2023-03-21T11:17:53-04:00
docs: add BlockedOnMVarRead thread status in eventlog encodings

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898afaef by Adam Sandberg Ericsson at 2023-03-21T11:17:53-04:00
docs: add TASK_DELETE event in eventlog encodings

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bb05b4cc by Adam Sandberg Ericsson at 2023-03-21T11:17:53-04:00
docs: add WALL_CLOCK_TIME event in eventlog encodings

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eeea0343 by Torsten Schmits at 2023-03-21T11:18:34-04:00
Add structured error messages for GHC.Tc.Utils.Env

Tracking ticket: #20119

MR: !10129

This converts uses of `mkTcRnUnknownMessage` to newly added constructors
of `TcRnMessage`.

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be1d4be8 by Bodigrim at 2023-03-21T11:19:13-04:00
Document pdep / pext primops

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e8b4aac4 by Alex Mason at 2023-03-21T18:11:04-04:00
Allow LLVM backend to use HDoc for faster file generation.

Also remove the MetaStmt constructor from LlvmStatement and places the annotations into the Store statement.

Includes “Implement a workaround for -no-asm-shortcutting bug“ (https://gitlab.haskell.org/ghc/ghc/-/commit/2fda9e0df886cc551e2cd6b9c2a384192bdc3045)

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ea24360d by Luite Stegeman at 2023-03-21T18:11:44-04:00
Compute LambdaFormInfo when using JavaScript backend.

CmmCgInfos is needed to write interface files, but the
JavaScript backend does not generate it, causing
"Name without LFInfo" warnings.

This patch adds a conservative but always correct
CmmCgInfos when the JavaScript backend is used.

Fixes #23053

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926ad6de by Simon Peyton Jones at 2023-03-22T01:03:08-04:00
Be more careful about quantification

This MR is driven by #23051. It does several things:

* It is guided by the generalisation plan described in #20686.
  But it is still far from a complete implementation of that plan.

* Add Note [Inferred type with escaping kind] to GHC.Tc.Gen.Bind.
  This explains that we don't (yet, pending #20686) directly
  prevent generalising over escaping kinds.

* In `GHC.Tc.Utils.TcMType.defaultTyVar` we default RuntimeRep
  and Multiplicity variables, beause we don't want to quantify over
  them.  We want to do the same for a Concrete tyvar, but there is
  nothing sensible to default it to (unless it has kind RuntimeRep,
  in which case it'll be caught by an earlier case). So we promote
  instead.

* Pure refactoring in GHC.Tc.Solver:
  * Rename decideMonoTyVars to decidePromotedTyVars, since that's
    what it does.

  * Move the actual promotion of the tyvars-to-promote from
    `defaultTyVarsAndSimplify` to `decidePromotedTyVars`.  This is a
    no-op; just tidies up the code.  E.g then we don't need to
    return the promoted tyvars from `decidePromotedTyVars`.

  * A little refactoring in `defaultTyVarsAndSimplify`, but no
    change in behaviour.

* When making a TauTv unification variable into a ConcreteTv
  (in GHC.Tc.Utils.Concrete.makeTypeConcrete), preserve the occ-name
  of the type variable.  This just improves error messages.

* Kill off dead code: GHC.Tc.Utils.TcMType.newConcreteHole

- - - - -
0ab0cc11 by Sylvain Henry at 2023-03-22T01:03:48-04:00
Testsuite: use appropriate predicate for ManyUbxSums test (#22576)

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048c881e by romes at 2023-03-22T01:04:24-04:00
fix: Incorrect @since annotations in GHC.TypeError

Fixes #23128

- - - - -
a1528b68 by Sylvain Henry at 2023-03-22T01:05:04-04:00
Testsuite: use req_interp predicate for T16318 (#22370)

- - - - -
ad765b6f by Sylvain Henry at 2023-03-22T01:05:04-04:00
Testsuite: use req_interp predicate for T20214

- - - - -
e0b8eaf3 by Simon Peyton Jones at 2023-03-22T09:50:13+00:00
Refactor the constraint solver pipeline

The big change is to put the entire type-equality solver into
GHC.Tc.Solver.Equality, rather than scattering it over Canonical
and Interact.  Other changes

* EqCt becomes its own data type, a bit like QCInst.  This is
  great because EqualCtList is then just [EqCt]

* New module GHC.Tc.Solver.Dict has come of the class-contraint
  solver.  In due course it will be all.  One step at a time.

This MR is intended to have zero change in behaviour: it is a
pure refactor.  It opens the way to subsequent tidying up, we
believe.

- - - - -
cedf9a3b by Torsten Schmits at 2023-03-22T15:31:18-04:00
Add structured error messages for GHC.Tc.Utils.TcMType

Tracking ticket: #20119

MR: !10138

This converts uses of `mkTcRnUnknownMessage` to newly added constructors
of `TcRnMessage`.

- - - - -
30d45e97 by Sylvain Henry at 2023-03-22T15:32:01-04:00
Testsuite: use js_skip for T2615 (#22374)

- - - - -
833413f4 by Ben Gamari at 2023-03-23T16:13:56-04:00
rts: Fix barriers of IND and IND_STATIC

Previously IND and IND_STATIC lacked the acquire barriers enjoyed by
BLACKHOLE. As noted in the (now updated) Note [Heap memory barriers],
this barrier is critical to ensure that the indirectee is visible to the
entering core.

Fixes #22872.

- - - - -

30 changed files:

- .gitlab/gen_ci.hs
- .gitlab/jobs.yaml
- .gitmodules
- compiler/GHC.hs
- compiler/GHC/Builtin/Names.hs
- compiler/GHC/Builtin/Types.hs
- compiler/GHC/Builtin/Uniques.hs
- compiler/GHC/Builtin/primops.txt.pp
- compiler/GHC/ByteCode/Instr.hs
- compiler/GHC/CmmToLlvm.hs
- compiler/GHC/CmmToLlvm/Base.hs
- compiler/GHC/CmmToLlvm/CodeGen.hs
- compiler/GHC/CmmToLlvm/Ppr.hs
- compiler/GHC/Core/InstEnv.hs
- compiler/GHC/Core/Opt/DmdAnal.hs
- compiler/GHC/Core/Opt/Simplify/Utils.hs
- compiler/GHC/Data/Bag.hs
- compiler/GHC/Driver/Config.hs
- compiler/GHC/Driver/Main.hs
- compiler/GHC/HsToCore/Foreign/JavaScript.hs
- compiler/GHC/Linker/Loader.hs
- compiler/GHC/Linker/Static.hs
- compiler/GHC/Llvm/MetaData.hs
- compiler/GHC/Llvm/Ppr.hs
- compiler/GHC/Llvm/Syntax.hs
- compiler/GHC/Llvm/Types.hs
- compiler/GHC/Rename/Splice.hs
- compiler/GHC/Rename/Utils.hs
- compiler/GHC/Runtime/Interpreter.hs
- compiler/GHC/StgToByteCode.hs

The diff was not included because it is too large.

View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/4e1961e11457ba16eb99daa4ffd66d6fde637aeb...833413f4d85e252f88dbd1634ed2ae9c49fa8b53

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/4e1961e11457ba16eb99daa4ffd66d6fde637aeb...833413f4d85e252f88dbd1634ed2ae9c49fa8b53
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