[Git][ghc/ghc][wip/top-level-kind-signatures] 105 commits: Hadrian: fix binary-dir with --docs=none

Vladislav Zavialov gitlab at gitlab.haskell.org
Wed May 8 03:01:14 UTC 2019



Vladislav Zavialov pushed to branch wip/top-level-kind-signatures at Glasgow Haskell Compiler / GHC


Commits:
c401f8a4 by Sylvain Henry at 2019-04-11T23:51:24Z
Hadrian: fix binary-dir with --docs=none

Hadrian's "binary-dist" target must check that the "docs" directory
exists (it may not since we can disable docs generation).

- - - - -
091195a4 by Ömer Sinan Ağacan at 2019-04-11T23:57:38Z
Remove unused remilestoning script

- - - - -
fa0ccbb8 by Ömer Sinan Ağacan at 2019-04-11T23:57:38Z
Update a panic message

Point users to the right URL

- - - - -
beaa07d2 by Sylvain Henry at 2019-04-12T17:17:21Z
Hadrian: fix ghci wrapper script generation (#16508)

- - - - -
e05df3e1 by Ben Gamari at 2019-04-12T17:23:30Z
gitlab-ci: Ensure that version number has three components

- - - - -
885d2e04 by klebinger.andreas at gmx.at at 2019-04-12T18:40:04Z
Add -ddump-stg-final to dump stg as it is used for codegen.

Intermediate STG does not contain free variables which can be useful
sometimes. So adding a flag to dump that info.

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3c759ced by Alp Mestanogullari at 2019-04-12T18:46:54Z
Hadrian: add a --test-accept/-a flag, to mimic 'make accept'

When -a or --test-accept is passed, and if one runs the 'test' target, then
any test failing because of mismatching output and which is not expected to
fail will have its expected output adjusted by the test driver, effectively
considering the new output correct from now on.

When this flag is passed, hadrian's 'test' target becomes sensitive to the
PLATFORM and OS environment variable, just like the Make build system:
- when the PLATFORM env var is set to "YES", when accepting a result, accept it
  for the current platform;
- when the OS env var is set to "YES", when accepting a result, accept it
  for all wordsizes of the current operating system.

This can all be combined with `--only="..."` and `TEST="..." to only accept
the new output of a subset of tests.

- - - - -
f4b5a6c0 by Alp Mestanogullari at 2019-04-12T18:46:54Z
Hadrian: document -a/--test-accept

- - - - -
30a0988d by Ben Gamari at 2019-04-12T19:41:07Z
gitlab: Disable windows-hadrian job

Not only is it reliably failing due to #16574 but all of the quickly
failing builds also causes the Windows runners to run out of disk space.

- - - - -
8870a51b by Ben Gamari at 2019-04-12T19:41:07Z
gitlab: Don't run lint-submods job on Marge branches

This broke Marge by creating a second pipeline (consisting of only the
`lint-submods` job). Marge then looked at this pipeline and concluded
that CI for her merge branch passed. However, this is ignores the fact
that the majority of the CI jobs are triggered on `merge_request` and
are therefore in another pipeline.

- - - - -
7876d088 by Ben Gamari at 2019-04-13T13:51:59Z
linters: Fix check-version-number

This should have used `grep -E`, not `grep -e`
- - - - -
2e7b2e55 by Ara Adkins at 2019-04-13T14:00:02Z
[skip ci] Update CI badge in readme

This trivial MR updates the CI badge in the readme to point to the
new CI on gitlab, rather than the very out-of-date badge from
Travis.

- - - - -
40848a43 by Ben Gamari at 2019-04-13T14:02:36Z
base: Better document implementation implications of Data.Timeout

As noted in #16546 timeout uses asynchronous exceptions internally, an
implementation detail which can leak out in surprising ways.  Note this
fact.

Also expose the `Timeout` tycon.

[skip ci]

- - - - -
5f183081 by David Eichmann at 2019-04-14T05:08:15Z
Hadrian: add rts shared library symlinks for backwards compatability

Fixes test T3807 when building with Hadrian.

Trac #16370

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9b142c53 by Sylvain Henry at 2019-04-14T05:14:23Z
Hadrian: add binary-dist-dir target

This patch adds an Hadrian target "binary-dist-dir". Compared to
"binary-dist", it only builds a binary distribution directory without
creating the Tar archive. It makes the use/test of the bindist
installation script easier.

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6febc444 by Krzysztof Gogolewski at 2019-04-14T05:20:29Z
Fix assertion failures reported in #16533

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edcef7b3 by Artem Pyanykh at 2019-04-14T05:26:35Z
codegen: unroll memcpy calls for small bytearrays

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6094d43f by Artem Pyanykh at 2019-04-14T05:26:35Z
docs: mention memcpy optimization for ByteArrays in 8.10.1-notes

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d2271fe4 by Simon Jakobi at 2019-04-14T12:43:17Z
Ord docs: Add explanation on 'min' and 'max' operator interactions

[ci skip]

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e7cad16c by Krzysztof Gogolewski at 2019-04-14T12:49:23Z
Add a safeguard to Core Lint

Lint returns a pair (Maybe a, WarnsAndErrs). The Maybe monad
allows to handle an unrecoverable failure.
In case of such a failure, the error should be added to the second
component of the pair. If this is not done, Lint will silently
accept bad programs. This situation actually happened during
development of linear types. This adds a safeguard.

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c54a093f by Ben Gamari at 2019-04-14T12:55:29Z
CODEOWNERS: Add simonmar as owner of rts/linker

I suspect this is why @simonmar wasn't notified of !706.

[skip ci]

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1825f50d by Alp Mestanogullari at 2019-04-14T13:01:38Z
Hadrian: don't accept p_dyn for executables, to fix --flavour=prof

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b024e289 by Giles Anderson at 2019-04-15T10:20:29Z
Document how -O3 is handled by GHC

    -O2 is the highest value of optimization.
    -O3 will be reverted to -O2.

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4b1ef06d by Giles Anderson at 2019-04-15T10:20:29Z
Apply suggestion to docs/users_guide/using-optimisation.rst
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71cf94db by Fraser Tweedale at 2019-04-15T10:26:37Z
GHCi: fix load order of .ghci files

Directives in .ghci files in the current directory ("local .ghci")
can be overridden by global files.  Change the order in which the
configs are loaded: global and $HOME/.ghci first, then local.

Also introduce a new field to GHCiState to control whether local
.ghci gets sourced or ignored.  This commit does not add a way to
set this value (a subsequent commit will add this), but the .ghci
sourcing routine respects its value.

Fixes: https://gitlab.haskell.org/ghc/ghc/issues/14689
Related: https://gitlab.haskell.org/ghc/ghc/issues/6017
Related: https://gitlab.haskell.org/ghc/ghc/issues/14250

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5c06b60d by Fraser Tweedale at 2019-04-15T10:26:38Z
users-guide: update startup script order

Update users guide to match the new startup script order.  Also
clarify that -ignore-dot-ghci does not apply to scripts specified
via the -ghci-script option.

Part of: https://gitlab.haskell.org/ghc/ghc/issues/14689

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aa490b35 by Fraser Tweedale at 2019-04-15T10:26:38Z
GHCi: add 'local-config' setting

Add the ':set local-config { source | ignore }' setting to control
whether .ghci file in current directory will be sourced or not.  The
directive can be set in global config or $HOME/.ghci, which are
processed before local .ghci files.

The default is "source", preserving current behaviour.

Related: https://gitlab.haskell.org/ghc/ghc/issues/6017
Related: https://gitlab.haskell.org/ghc/ghc/issues/14250

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ed94d345 by Fraser Tweedale at 2019-04-15T10:26:38Z
users-guide: document :set local-config

Document the ':set local-config' command and add a warning about
sourcing untrusted local .ghci scripts.

Related: https://gitlab.haskell.org/ghc/ghc/issues/6017
Related: https://gitlab.haskell.org/ghc/ghc/issues/14250

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be05bd81 by Gabor Greif at 2019-04-15T21:19:03Z
asm-emit-time IND_STATIC elimination

When a new closure identifier is being established to a
local or exported closure already emitted into the same
module, refrain from adding an IND_STATIC closure, and
instead emit an assembly-language alias.

Inter-module IND_STATIC objects still remain, and need to be
addressed by other measures.

Binary-size savings on nofib are around 0.1%.

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57eb5bc6 by erthalion at 2019-04-16T19:40:36Z
Show dynamic object files (#16062)

Closes #16062. When -dynamic-too is specified, reflect that in the
progress message, like:

$ ghc Main.hs -dynamic-too
[1 of 1] Compiling Lib              ( Main.hs, Main.o, Main.dyn_o )

instead of:

$ ghc Main.hs -dynamic-too
[1 of 1] Compiling Lib              ( Main.hs, Main.o )

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894ec447 by Andrey Mokhov at 2019-04-16T19:46:44Z
Hadrian: Generate GHC wrapper scripts

This is a temporary workaround for #16534. We generate wrapper scripts
<build-root>/ghc-stage1 and <build-root>/ghc-stage2 that can be used to
run Stage1 and Stage2 GHCs with the right arguments.

See https://gitlab.haskell.org/ghc/ghc/issues/16534.

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e142ec99 by Sven Tennie at 2019-04-18T03:19:00Z
Typeset Big-O complexities with Tex-style notation (#16090)

E.g. use `\(\mathcal{O}(n^2)\)` instead of `/O(n^2)/`.

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f0f495f0 by klebinger.andreas at gmx.at at 2019-04-18T03:25:10Z
Add an Outputable instance for SDoc with ppr = id.

When printf debugging this can be helpful.

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e28706ea by Sylvain Henry at 2019-04-18T12:12:07Z
Gitlab: allow execution of CI pipeline from the web interface
[skip ci]

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4c8a67a4 by Alp Mestanogullari at 2019-04-18T12:18:18Z
Hadrian: fix ghcDebugged and document it

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5988f17a by Alp Mestanogullari at 2019-04-19T02:46:12Z
Hadrian: fix the value we pass to the test driver for config.compiler_debugged

We used to pass YES/NO, while that particular field is set to True/False. This
happens to fix an unexpected pass, T9208.

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57cf1133 by Alec Theriault at 2019-04-19T02:52:25Z
TH: make `Lift` and `TExp` levity-polymorphic

Besides the obvious benefits of being able to manipulate `TExp`'s of
unboxed types, this also simplified `-XDeriveLift` all while making
it more capable.

  * `ghc-prim` is explicitly depended upon by `template-haskell`

  * The following TH things are parametrized over `RuntimeRep`:

      - `TExp(..)`
      - `unTypeQ`
      - `unsafeTExpCoerce`
      - `Lift(..)`

  * The following instances have been added to `Lift`:

      - `Int#`, `Word#`, `Float#`, `Double#`, `Char#`, `Addr#`
      - unboxed tuples of lifted types up to arity 7
      - unboxed sums of lifted types up to arity 7

    Ideally we would have levity-polymorphic _instances_ of unboxed
    tuples and sums.

  * The code generated by `-XDeriveLift` uses expression quotes
    instead of generating large amounts of TH code and having
    special hard-coded cases for some unboxed types.

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fdfd9731 by Alec Theriault at 2019-04-19T02:52:25Z
Add test case for #16384

Now that `TExp` accepts unlifted types, #16384 is fixed. Since the real
issue there was GHC letting through an ill-kinded type which
`-dcore-lint` rightly rejected, a reasonable regression test is that
the program from #16384 can now be accepted without `-dcore-lint`
complaining.

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eb2a4df8 by Michal Terepeta at 2019-04-20T03:32:08Z
StgCmmPrim: remove an unnecessary instruction in doNewArrayOp

Previously we would generate a local variable pointing after the array
header and use it to initialize the array elements. But we already use
stores with offset, so it's easy to just add the header to those offsets
during compilation and avoid generating the local variable (which would
become a LEA instruction when using native codegen; LLVM already
optimizes it away).

Signed-off-by: Michal Terepeta <michal.terepeta at gmail.com>

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fcef26b6 by klebinger.andreas at gmx.at at 2019-04-20T03:38:16Z
Don't indent single alternative case expressions for STG.

Makes the width of STG dumps slightly saner.
Especially for things like unboxing.

Fixes #16580

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e7280c93 by Vladislav Zavialov at 2019-04-20T03:44:24Z
Tagless final encoding of ExpCmdI in the parser

Before this change, we used a roundabout encoding:

1. a GADT (ExpCmdG)
2. a class to pass it around (ExpCmdI)
3. helpers to match on it (ecHsApp, ecHsIf, ecHsCase, ...)

It is more straightforward to turn these helpers into class methods,
removing the need for a GADT.

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99dd5d6b by Alec Theriault at 2019-04-20T03:50:29Z
Haddock: support strict GADT args with docs

Rather than massaging the output of the parser to re-arrange docs and
bangs, it is simpler to patch the two places in which the strictness
info is needed (to accept that the `HsBangTy` may be inside an
`HsDocTy`).

Fixes #16585.

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10776562 by Andrey Mokhov at 2019-04-20T03:56:38Z
Hadrian: Drop old/unused CI scripts

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37b1a6da by Ben Gamari at 2019-04-20T15:55:20Z
gitlab-ci: Improve error message on failure of doc-tarball job

Previously the failure was quite nondescript.

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e3fe2601 by Ben Gamari at 2019-04-20T15:55:35Z
gitlab-ci: Allow doc-tarball job to fail

Due to allowed failure of Windows job.

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bd3872df by Ben Gamari at 2019-04-20T15:55:38Z
gitlab-ci: Only run release notes lint on release tags

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2145b738 by Ben Gamari at 2019-04-20T15:55:38Z
gitlab-ci: Add centos7 release job

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983c53c3 by Ben Gamari at 2019-04-20T15:55:38Z
gitlab-ci: Do not build profiled libraries on 32-bit Windows

Due to #15934.

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5cf771f3 by Ben Gamari at 2019-04-21T13:07:13Z
users-guide: Add pretty to package list

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6ac5da78 by Ben Gamari at 2019-04-21T13:07:13Z
users-guide: Add libraries section to 8.10.1 release notes

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3e963de3 by Andrew Martin at 2019-04-21T13:13:20Z
improve docs for casArray and casSmallArray

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98bffb07 by Andrew Martin at 2019-04-21T13:13:20Z
[skip ci] say "machine words" instead of "Int units" in the primops docs

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3aefc14a by Andrew Martin at 2019-04-21T13:13:20Z
[skip ci] correct formatting of casArray# in docs for casSmallArray#

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0e96d120 by Andrew Martin at 2019-04-21T13:13:20Z
[skip ci] correct the docs for casArray a little more. clarify that the returned element may be two different things

- - - - -
687152f2 by Artem Pyanykh at 2019-04-21T13:19:29Z
testsuite: move tests related to linker under tests/rts/linker

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36e51406 by Artem Pyanykh at 2019-04-21T13:19:29Z
testsuite: fix ifdef lint errors under tests/rts/linker

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1a7a329b by Matthew Pickering at 2019-04-22T18:37:30Z
Correct off by one error in ghci +c

Fixes #16569

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51655fd8 by Alp Mestanogullari at 2019-04-22T18:44:11Z
Hadrian: use the testsuite driver's config.haddock arg more correctly

4 haddock tests assume that .haddock files have been produced, by using the
'req_haddock' modifier. The testsuite driver assumes that this condition is
satisfied if 'config.haddock' is non-empty, but before this patch Hadrian was
always passing the path to where the haddock executable should be, regardless
of whether it is actually there or not.

Instead, we now pass an empty config.haddock when we can't find all of
<build root>/docs/html/libraries/<pkg>/<pkg>.haddock>, where <pkg> ranges over
array, base, ghc-prim, process and template-haskell, and pass the path
to haddock when all those file exists. This has the (desired) effect of skipping
the 4 tests (marked as 'missing library') when the docs haven't been built,
and running the haddock tests when they have.

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1959bad3 by Vladislav Zavialov at 2019-04-22T18:50:18Z
Stop misusing EWildPat in pattern match coverage checking

EWildPat is a constructor of HsExpr used in the parser to represent
wildcards in ambiguous positions:

* in expression context, EWildPat is turned into hsHoleExpr (see rnExpr)
* in pattern context, EWildPat is turned into WildPat (see checkPattern)

Since EWildPat exists solely for the needs of the parser, we could
remove it by improving the parser.

However, EWildPat has also been used for a different purpose since
8a50610: to represent patterns that the coverage checker cannot handle.
Not only this is a misuse of EWildPat, it also stymies the removal of
EWildPat.

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6a491726 by Fraser Tweedale at 2019-04-23T13:27:30Z
osReserveHeapMemory: handle signed rlim_t

rlim_t is a signed type on FreeBSD, and the build fails with a
sign-compare error.  Add explicit (unsigned) cast to handle this
case.

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ab9b3ace by Alexandre Baldé at 2019-04-23T13:33:37Z
Fix error message for './configure' regarding '--with-ghc' [skip ci]

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465f8f48 by Ben Gamari at 2019-04-24T16:19:24Z
gitlab-ci: source-tarball job should have no dependencies

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0fc69416 by Vladislav Zavialov at 2019-04-25T18:28:56Z
Introduce MonadP, make PV a newtype

Previously we defined   type PV = P,
this had the downside that if we wanted to change PV,
we would have to modify P as well.

Now PV is free to evolve independently from P.

The common operations addError, addFatalError, getBit, addAnnsAt,
were abstracted into a class called MonadP.

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f85efdec by Vladislav Zavialov at 2019-04-25T18:28:56Z
checkPattern error hint is PV context

There is a hint added to error messages reported in checkPattern.
Instead of passing it manually, we put it in a ReaderT environment inside PV.

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4e228267 by Ömer Sinan Ağacan at 2019-04-25T18:35:09Z
Minor RTS refactoring:

- Remove redundant casting in evacuate_static_object
- Remove redundant parens in STATIC_LINK
- Fix a typo in GC.c

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faa94d47 by Ben Gamari at 2019-04-25T21:16:21Z
update-autoconf: Initial commit

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4811cd39 by Ben Gamari at 2019-04-25T21:16:21Z
Update autoconf scripts

Scripts taken from autoconf a8d79c3130da83c7cacd6fee31b9acc53799c406

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0040af59 by Ben Gamari at 2019-04-25T21:16:21Z
gitlab-ci: Reintroduce DWARF-enabled bindists

It seems that this was inadvertently dropped in
1285d6b95fbae7858abbc4722bc2301d7fe40425.

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2c115085 by Wojciech Baranowski at 2019-04-30T01:02:38Z
rename: hadle type signatures with typos

When encountering type signatures for unknown names, suggest similar
alternatives.

This fixes issue #16504

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fb9408dd by Wojciech Baranowski at 2019-04-30T01:02:38Z
Print suggestions in a single message

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e8bf8834 by Wojciech Baranowski at 2019-04-30T01:02:38Z
osa1's patch: consistent suggestion message

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1deb2bb0 by Wojciech Baranowski at 2019-04-30T01:02:38Z
Comment on 'candidates' function

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8ee47432 by Wojciech Baranowski at 2019-04-30T01:02:38Z
Suggest only local candidates from global env

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e23f78ba by Wojciech Baranowski at 2019-04-30T01:02:38Z
Use pp_item

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1abb76ab by Ben Gamari at 2019-04-30T01:08:45Z
ghci: Ensure that system libffi include path is searched

Previously hsc2hs failed when building against a system FFI.

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014ed644 by Sebastian Graf at 2019-05-01T00:23:21Z
Compute demand signatures assuming idArity

This does four things:

1. Look at `idArity` instead of manifest lambdas to decide whether to use LetUp
2. Compute the strictness signature in LetDown assuming at least `idArity`
   incoming arguments
3. Remove the special case for trivial RHSs, which is subsumed by 2
4. Don't perform the W/W split when doing so would eta expand a binding.
   Otherwise we would eta expand PAPs, causing unnecessary churn in the
   Simplifier.

NoFib Results

--------------------------------------------------------------------------------
        Program         Allocs    Instrs
--------------------------------------------------------------------------------
 fannkuch-redux          +0.3%      0.0%
             gg          -0.0%     -0.1%
       maillist          +0.2%     +0.2%
        minimax           0.0%     +0.8%
         pretty           0.0%     -0.1%
        reptile          -0.0%     -1.2%
--------------------------------------------------------------------------------
            Min          -0.0%     -1.2%
            Max          +0.3%     +0.8%
 Geometric Mean          +0.0%     -0.0%

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d37d91e9 by John Ericson at 2019-05-01T00:29:31Z
Generate settings by make/hadrian instead of configure

This allows it to eventually become stage-specific

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53d1cd96 by John Ericson at 2019-05-01T00:29:31Z
Remove settings.in

It is no longer needed

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2988ef5e by John Ericson at 2019-05-01T00:29:31Z
Move cGHC_UNLIT_PGM to be "unlit command" in settings

The bulk of the work was done in #712, making settings be make/Hadrian
controlled. This commit then just moves the unlit command rules in
make/Hadrian from the `Config.hs` generator to the `settings` generator
in each build system.

I think this is a good change because the crucial benefit is *settings*
don't affect the build: ghc gets one baby step closer to being a regular
cabal executable, and make/Hadrian just maintains settings as part of
bootstrapping.

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37a4fd97 by Alp Mestanogullari at 2019-05-01T00:35:35Z
Build Hadrian with -Werror in the 'ghc-in-ghci' CI job

- - - - -
1bef62c3 by Ben Gamari at 2019-05-01T00:41:42Z
ErrUtils: Emit progress messages to eventlog

- - - - -
ebfa3528 by Ben Gamari at 2019-05-01T00:41:42Z
Emit GHC timing events to eventlog

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4186b410 by Sven Tennie at 2019-05-03T17:40:36Z
Typeset Big-O complexities with Tex-style notation (#16090)

Use `\min` instead of `min` to typeset it as an operator.

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9047f184 by Shayne Fletcher at 2019-05-03T18:54:50Z
Make Extension derive Bounded

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0dde64f2 by Ben Gamari at 2019-05-03T18:54:50Z
testsuite: Mark concprog001 as fragile

Due to #16604.
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8f929388 by Alp Mestanogullari at 2019-05-03T18:54:50Z
Hadrian: generate JUnit testsuite report in Linux CI job

We also keep it as an artifact, like we do for non-Hadrian jobs, and list it
as a junit report, so that the test results are reported in the GitLab UI for
merge requests.

- - - - -
52fc2719 by Vladislav Zavialov at 2019-05-03T18:54:50Z
Pattern/expression ambiguity resolution

This patch removes 'EWildPat', 'EAsPat', 'EViewPat', and 'ELazyPat'
from 'HsExpr' by using the ambiguity resolution system introduced
earlier for the command/expression ambiguity.

Problem: there are places in the grammar where we do not know whether we
are parsing an expression or a pattern, for example:

	do { Con a b <- x } -- 'Con a b' is a pattern
	do { Con a b }      -- 'Con a b' is an expression

Until we encounter binding syntax (<-) we don't know whether to parse
'Con a b' as an expression or a pattern.

The old solution was to parse as HsExpr always, and rejig later:

	checkPattern :: LHsExpr GhcPs -> P (LPat GhcPs)

This meant polluting 'HsExpr' with pattern-related constructors. In
other words, limitations of the parser were affecting the AST, and all
other code (the renamer, the typechecker) had to deal with these extra
constructors.

We fix this abstraction leak by parsing into an overloaded
representation:

	class DisambECP b where ...
	newtype ECP = ECP { runECP_PV :: forall b. DisambECP b => PV (Located b) }

See Note [Ambiguous syntactic categories] for details.

Now the intricacies of parsing have no effect on the hsSyn AST when it
comes to the expression/pattern ambiguity.

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9b59e126 by Ningning Xie at 2019-05-03T18:54:50Z
Only skip decls with CUSKs with PolyKinds on (fix #16609)

- - - - -
87bc954a by Ömer Sinan Ağacan at 2019-05-03T18:54:50Z
Fix interface version number printing in --show-iface

Before

    Version: Wanted [8, 0, 9, 0, 2, 0, 1, 9, 0, 4, 2, 5],
             got    [8, 0, 9, 0, 2, 0, 1, 9, 0, 4, 2, 5]

After

    Version: Wanted 809020190425,
             got    809020190425

- - - - -
cc495d57 by Ryan Scott at 2019-05-03T18:54:50Z
Make equality constraints in kinds invisible

Issues #12102 and #15872 revealed something strange about the way GHC
handles equality constraints in kinds: it treats them as _visible_
arguments! This causes a litany of strange effects, from strange
error messages
(https://gitlab.haskell.org/ghc/ghc/issues/12102#note_169035)
to bizarre `Eq#`-related things leaking through to GHCi output, even
without any special flags enabled.

This patch is an attempt to contain some of this strangeness.
In particular:

* In `TcHsType.etaExpandAlgTyCon`, we propagate through the
  `AnonArgFlag`s of any `Anon` binders. Previously, we were always
  hard-coding them to `VisArg`, which meant that invisible binders
  (like those whose kinds were equality constraint) would mistakenly
  get flagged as visible.
* In `ToIface.toIfaceAppArgsX`, we previously assumed that the
  argument to a `FunTy` always corresponding to a `Required`
  argument. We now dispatch on the `FunTy`'s `AnonArgFlag` and map
  `VisArg` to `Required` and `InvisArg` to `Inferred`. As a
  consequence, the iface pretty-printer correctly recognizes that
  equality coercions are inferred arguments, and as a result,
  only displays them in `-fprint-explicit-kinds` is enabled.
* Speaking of iface pretty-printing, `Anon InvisArg` binders were
  previously being pretty-printed like `T (a :: b ~ c)`, as if they
  were required. This seemed inconsistent with other invisible
  arguments (that are printed like `T @{d}`), so I decided to switch
  this to `T @{a :: b ~ c}`.

Along the way, I also cleaned up a minor inaccuracy in the users'
guide section for constraints in kinds that was spotted in
https://gitlab.haskell.org/ghc/ghc/issues/12102#note_136220.

Fixes #12102 and #15872.

- - - - -
f862963b by Ömer Sinan Ağacan at 2019-05-04T00:50:03Z
rts: Properly free the RTSSummaryStats structure

`stat_exit` always allocates a `RTSSummaryStats` but only sometimes
frees it, which casues leaks. With this patch we unconditionally free
the structure, fixing the leak.

Fixes #16584

- - - - -
0af93d16 by Ömer Sinan Ağacan at 2019-05-04T00:56:18Z
StgCmmMonad: remove emitProc_, don't export emitProc

- - - - -
0a3e4db3 by Ömer Sinan Ağacan at 2019-05-04T00:56:18Z
PrimOps.cmm: remove unused stuff

- - - - -
63150b9e by iustin at 2019-05-04T21:54:23Z
Fix typo in 8.8.1 notes related to traceBinaryEvent

- fixes double mention of `traceBinaryEvent#` (the second one should be `traceEvent#`, I think)
- fixes note about `traceEvent#` taking a `String` - the docs say it takes a zero-terminated ByteString.
- - - - -
dc8a5868 by gallais at 2019-05-04T22:00:30Z
[ typo ] 'castFloatToWord32' -> 'castFloatToWord64'

Probably due to a copy/paste gone wrong.
- - - - -
615b4be6 by Chaitanya Koparkar at 2019-05-05T14:39:24Z
Fix #16593 by having only one definition of -fprint-explicit-runtime-reps

[skip ci]

- - - - -
ead3f835 by Vladislav Zavialov at 2019-05-05T14:39:24Z
'warnSpaceAfterBang' only in patterns (#16619)

- - - - -
27941064 by John Ericson at 2019-05-06T18:59:29Z
Remove cGhcEnableTablesNextToCode

Get "Tables next to code" from the settings file instead.

- - - - -
821fa9e8 by Takenobu Tani at 2019-05-06T19:05:36Z
Remove `$(TOP)/ANNOUNCE` file

Remove `$(TOP)/ANNOUNCE` because maintaining this file is expensive
for each release.

Currently, release announcements of ghc are made on ghc blogs and wikis.

[skip ci]

- - - - -
e172a6d1 by Alp Mestanogullari at 2019-05-06T19:11:43Z
Enable external interpreter when TH is requested but no internal interpreter is available

- - - - -
ba0aed2e by Alp Mestanogullari at 2019-05-06T21:32:56Z
Hadrian: override $(ghc-config-mk), to prevent redundant config generation

This required making the 'ghc-config-mk' variable overridable in
testsuite/mk/boilerplate.mk, and then making use of this in hadrian
to point to '<build root>/test/ghcconfig' instead, which is where we
always put the test config.

Previously, we would build ghc-config and run it against the
GHC to be tested, a second time, while we're running the tests, because some
include testsuite/mk/boilerplate.mk. This was causing unexpected output
failures.

- - - - -
96197961 by Ryan Scott at 2019-05-07T10:35:58Z
Add /includes/dist to .gitignore

As of commit d37d91e9a444a7822eef1558198d21511558515e, the GHC build
now autogenerates a `includes/dist/build/settings` file. To avoid
dirtying the current `git` status, this adds `includes/dist` to
`.gitignore`.

[ci skip]

- - - - -
78a5c4ce by Ryan Scott at 2019-05-07T21:03:04Z
Check for duplicate variables in associated default equations

A follow-up to !696's, which attempted to clean up the error messages
for ill formed associated type family default equations. The previous
attempt, !696, forgot to account for the possibility of duplicate
kind variable arguments, as in the following example:

```hs
class C (a :: j) where
  type T (a :: j) (b :: k)
  type T (a :: k) (b :: k) = k
```

This patch addresses this shortcoming by adding an additional check
for this. Fixes #13971 (hopefully for good this time).

- - - - -
f58ea556 by Kevin Buhr at 2019-05-07T21:09:13Z
Add regression test for old typechecking issue #505

- - - - -
240f6bba by Vladislav Zavialov at 2019-05-08T03:00:36Z
WIP: Top-level kind signatures

- - - - -


30 changed files:

- .gitignore
- .gitlab-ci.yml
- + .gitlab/linters/check-version-number.sh
- − ANNOUNCE
- CODEOWNERS
- README.md
- aclocal.m4
- compiler/basicTypes/Demand.hs
- compiler/basicTypes/Id.hs
- compiler/basicTypes/IdInfo.hs
- compiler/basicTypes/Var.hs
- compiler/cmm/CLabel.hs
- compiler/cmm/CmmExpr.hs
- compiler/codeGen/StgCmmBind.hs
- compiler/codeGen/StgCmmMonad.hs
- compiler/codeGen/StgCmmPrim.hs
- compiler/coreSyn/CoreArity.hs
- compiler/coreSyn/CoreLint.hs
- compiler/coreSyn/CoreUnfold.hs
- compiler/deSugar/Check.hs
- compiler/deSugar/DsExpr.hs
- compiler/ghc.mk
- compiler/ghci/ByteCodeLink.hs
- compiler/hieFile/HieAst.hs
- compiler/hsSyn/HsBinds.hs
- compiler/hsSyn/HsDecls.hs
- compiler/hsSyn/HsExpr.hs
- compiler/hsSyn/HsExtension.hs
- compiler/hsSyn/HsInstances.hs
- compiler/hsSyn/HsTypes.hs


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/compare/2cb57eaeee39241f9ab857a4c2bf4af9722ba93c...240f6bba41ca2fa2e78b326a7d1a8d0a698f3533

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/compare/2cb57eaeee39241f9ab857a4c2bf4af9722ba93c...240f6bba41ca2fa2e78b326a7d1a8d0a698f3533
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