Forgot to handle these!  In they go, plus a test case.

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Thomas Miedema authored Jan 22, 2017 and Ben Gamari committed Jan 22, 2017

The `clean_cmd` and `extra_clean` setup functions don't do anything.
Remove them from .T files.

Created using https://github.com/thomie/refactor-ghc-testsuite. This
diff is a test for the .T-file parser/processor/pretty-printer in that
repository.

    find . -name '*.T' -exec ~/refactor-ghc-testsuite/Main "{}" \;

Tests containing inline comments or multiline strings are not modified.

Preparation for #12223.

Test Plan: Harbormaster

Reviewers: austin, hvr, simonmar, mpickering, bgamari

Reviewed By: mpickering

Subscribers: mpickering

Differential Revision: https://phabricator.haskell.org/D3000

GHC Trac Issues: #12223

These are only failing on Darwin, strangely enough, but do so quite
reproducibly.

Summary:
This reverts commit a0899b2f. This is because
removing these checks prompts panics in at least two different programs
reported in #12785.

Test Plan: ./validate

Reviewers: simonpj, goldfire, bgamari, austin

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2931

GHC Trac Issues: #12785

Currently we use `-Wl` which takes a list of
comma-separated options. Unfortunately that
breaks when you use it with `-rpath` and
a path that has commas in them.
Buck, the build system, produces paths with
commas in them.

`-Xlinker` doesn't have this disadvantage
and as far as I can tell is supported by
both `gcc` and `clang`. Anecdotally `nvcc`
supports `-Xlinker`, but not `-Wl`.

Test Plan: ./validate, harbourmaster

Reviewers: nomeata, simonmar, austin, bgamari, hvr

Reviewed By: simonmar, bgamari

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2971

Yuras authored Jan 20, 2017 and Ben Gamari committed Jan 20, 2017

Introduce a warning, -Wmissing-home-modules, to warn about home modules,
not listed in command line.

It is usefull for cabal when user fails to list a module in
`exposed-modules` and `other-modules`.

Test Plan: make TEST=MissingMod

Reviewers: mpickering, austin, bgamari

Reviewed By: bgamari

Subscribers: simonpj, mpickering, thomie

Differential Revision: https://phabricator.haskell.org/D2977

GHC Trac Issues: #13129

dobenour authored Jan 20, 2017 and Ben Gamari committed Jan 20, 2017

Test Plan: GHC CI

Reviewers: austin, hvr, bgamari

Reviewed By: bgamari

Subscribers: thomie, erikd

Differential Revision: https://phabricator.haskell.org/D2993

rwbarton authored Jan 20, 2017 and Ben Gamari committed Jan 20, 2017

Test Plan: harbormaster

Reviewers: austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2991

rwbarton authored Jan 20, 2017 and Ben Gamari committed Jan 20, 2017

Reviewers: austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2990

GHC Trac Issues: #13099

Phil de Joux authored Jan 20, 2017 and Ben Gamari committed Jan 20, 2017

This fixes #12441, where definitions in a Haskell module and its boot
file which differed only in their quantifiers produced a confusing error
message. Here we teach GHC to always show quantifiers for these errors.

Reviewers: goldfire, simonmar, erikd, austin, hvr, bgamari

Reviewed By: bgamari

Subscribers: snowleopard, simonpj, mpickering, thomie

Differential Revision: https://phabricator.haskell.org/D2734

GHC Trac Issues: #12441

takano-akio authored Jan 18, 2017 and Ben Gamari committed Jan 20, 2017

This commits relaxes the invariants of the Core syntax so that a
top-level variable can be bound to a primitive string literal of type
Addr#.

This commit:

* Relaxes the invatiants of the Core, and allows top-level bindings whose
  type is Addr# as long as their RHS is either a primitive string literal or
  another variable.

* Allows the simplifier and the full-laziness transformer to float out
  primitive string literals to the top leve.

* Introduces the new StgGenTopBinding type to accomodate top-level Addr#
  bindings.

* Introduces a new type of labels in the object code, with the suffix "_bytes",
  for exported top-level Addr# bindings.

* Makes some built-in rules more robust. This was necessary to keep them
  functional after the above changes.

This is a continuation of D2554.

Rebasing notes:
This had two slightly suspicious performance regressions:

* T12425: bytes allocated regressed by roughly 5%
* T4029: bytes allocated regressed by a bit over 1%
* T13035: bytes allocated regressed by a bit over 5%

These deserve additional investigation.

Rebased by: bgamari.

Test Plan: ./validate --slow

Reviewers: goldfire, trofi, simonmar, simonpj, austin, hvr, bgamari

Reviewed By: trofi, simonpj, bgamari

Subscribers: trofi, simonpj, gridaphobe, thomie

Differential Revision: https://phabricator.haskell.org/D2605

GHC Trac Issues: #8472

Oleg Grenrus authored Jan 19, 2017 and Ben Gamari committed Jan 20, 2017

Reviewers: dfeuer, austin, bgamari, hvr

Subscribers: dfeuer, mpickering, RyanGlScott, ekmett, yav, lelf,
simonpj, thomie

Differential Revision: https://phabricator.haskell.org/D2632

GHC Trac Issues: #12162

Trac #13156 showed a lost opportunity for CSE. I found that it was
easy to fix, and it had the nice side effect of rendering a previous
nasty case, described in Note [Corner case for case expressions],
unnecessary.

Simpler code, does more.  Great.

This bug has been lurking for ages: Trac #13155

The important semantic change is to ensure that exprIsExpandable
returns False for primop calls.  Previously exprIsExpandable used
exprIsCheap' which always used primOpIsCheap.

I took the opportunity to combine the code for exprIsCheap' (two
variants: exprIsCheap and exprIsExpandable) with that for
exprIsWorkFree.  Result is simpler, tighter, easier to understand.
And correct (at least wrt this bug)!

David Feuer authored Jan 19, 2017 and David Feuer committed Jan 19, 2017

Eric Mertens pointed out that using the default `foldMap`
implementation for `Maybe` led to an efficiency problem by
implementing `foldMap f (Just x)` as `f x <> mempty` rather than
as `f x`. This should solve the problem.

Reviewers: hvr, austin, bgamari

Reviewed By: bgamari

Subscribers: glguy, thomie

Differential Revision: https://phabricator.haskell.org/D2988

Summary:
If Perl isn't needed, we don't need to error out.  Since all Perl is
used for is the splitter, we can just warn.

Test Plan: GHC CI

Reviewers: bgamari, hvr, austin

Reviewed By: bgamari

Subscribers: thomie, erikd

Differential Revision: https://phabricator.haskell.org/D2986

GHC Trac Issues: #13141

Following e7985ed2. HasDebugCallStack now
appears in IdInfo, which requires `FlexibleContexts` to be enabled when built
with GHC 7.10.

This commit implements the proposal in
https://github.com/ghc-proposals/ghc-proposals/pull/29 and
https://github.com/ghc-proposals/ghc-proposals/pull/35.

Here are some of the pieces of that proposal:

* Some of RuntimeRep's constructors have been shortened.

* TupleRep and SumRep are now parameterized over a list of RuntimeReps.
* This
means that two types with the same kind surely have the same
representation.
Previously, all unboxed tuples had the same kind, and thus the fact
above was
false.

* RepType.typePrimRep and friends now return a *list* of PrimReps. These
functions can now work successfully on unboxed tuples. This change is
necessary because we allow abstraction over unboxed tuple types and so
cannot
always handle unboxed tuples specially as we did before.

* We sometimes have to create an Id from a PrimRep. I thus split PtrRep
* into
LiftedRep and UnliftedRep, so that the created Ids have the right
strictness.

* The RepType.RepType type was removed, as it didn't seem to help with
* much.

* The RepType.repType function is also removed, in favor of typePrimRep.

* I have waffled a good deal on whether or not to keep VoidRep in
TyCon.PrimRep. In the end, I decided to keep it there. PrimRep is *not*
represented in RuntimeRep, and typePrimRep will never return a list
including
VoidRep. But it's handy to have in, e.g., ByteCodeGen and friends. I can
imagine another design choice where we have a PrimRepV type that is
PrimRep
with an extra constructor. That seemed to be a heavier design, though,
and I'm
not sure what the benefit would be.

* The last, unused vestiges of # (unliftedTypeKind) have been removed.

* There were several pretty-printing bugs that this change exposed;
* these are fixed.

* We previously checked for levity polymorphism in the types of binders.
* But we
also must exclude levity polymorphism in function arguments. This is
hard to check
for, requiring a good deal of care in the desugarer. See Note [Levity
polymorphism
checking] in DsMonad.

* In order to efficiently check for levity polymorphism in functions, it
* was necessary
to add a new bit of IdInfo. See Note [Levity info] in IdInfo.

* It is now safe for unlifted types to be unsaturated in Core. Core Lint
* is updated
accordingly.

* We can only know strictness after zonking, so several checks around
* strictness
in the type-checker (checkStrictBinds, the check for unlifted variables
under a ~
pattern) have been moved to the desugarer.

* Along the way, I improved the treatment of unlifted vs. banged
* bindings. See
Note [Strict binds checks] in DsBinds and #13075.

* Now that we print type-checked source, we must be careful to print
* ConLikes correctly.
This is facilitated by a new HsConLikeOut constructor to HsExpr.
Particularly troublesome
are unlifted pattern synonyms that get an extra void# argument.

* Includes a submodule update for haddock, getting rid of #.

* New testcases:
  typecheck/should_fail/StrictBinds
  typecheck/should_fail/T12973
  typecheck/should_run/StrictPats
  typecheck/should_run/T12809
  typecheck/should_fail/T13105
  patsyn/should_fail/UnliftedPSBind
  typecheck/should_fail/LevPolyBounded
  typecheck/should_compile/T12987
  typecheck/should_compile/T11736

* Fixed tickets:
  #12809
  #12973
  #11736
  #13075
  #12987

* This also adds a test case for #13105. This test case is
* "compile_fail" and
succeeds, because I want the testsuite to monitor the error message.
When #13105 is fixed, the test case will compile cleanly.

rwbarton authored Jan 18, 2017 and Ben Gamari committed Jan 18, 2017

Test Plan: validate

Reviewers: simonpj, austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2985

GHC Trac Issues: #13132

Ryan Scott authored Jan 18, 2017 and Ben Gamari committed Jan 18, 2017

This adds a `CBool` type wrapping C99's `bool`, i.e., an `unsigned
char`.

Fixes #13136.

Test Plan: ./validate on Tier-1 platforms

Reviewers: austin, hvr, simonmar, bgamari

Reviewed By: simonmar, bgamari

Subscribers: thomie, erikd

Differential Revision: https://phabricator.haskell.org/D2982

GHC Trac Issues: #13136

Daishi Nakajima authored Jan 18, 2017 and Ben Gamari committed Jan 18, 2017

Test Plan:
Added 2 test cases, verified that  ghc can suggest in the following
cases:

  - for misspelled flag containing '=', ghc suggests flags that doesn't
    contain '='
  - for misspelled flag containing '=', ghc suggests flags that
    contains '='

Reviewers: austin, dfeuer, bgamari

Reviewed By: dfeuer, bgamari

Subscribers: dfeuer, mpickering, thomie

Differential Revision: https://phabricator.haskell.org/D2978

GHC Trac Issues: #11789

Shea Levy authored Jan 18, 2017 and Ben Gamari committed Jan 18, 2017

Reviewers: austin, rwbarton, simonmar, hvr, bgamari

Reviewed By: rwbarton, simonmar

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2970

Tamar Christina authored Jan 18, 2017 and Ben Gamari committed Jan 18, 2017

Clean up the linker code for PE.

1. Stop copying structures from the windows header
   and use those that are in the headers. There's no
   point in copying them and we got a few types wrong.

2. Replace custom typedef with C99 types. If we're not
   going to use the Windows type aliases, at least use
   standard ones.

Test Plan: ./validate

Reviewers: simonmar, austin, erikd, bgamari

Reviewed By: simonmar, bgamari

Subscribers: dfeuer, thomie, #ghc_windows_task_force

Differential Revision: https://phabricator.haskell.org/D2944

The fix in D2964 wasn't quite right; the sleep was in the wrong place, as
pointed out by @gracjan.

Yuras authored Jan 17, 2017 and Ben Gamari committed Jan 17, 2017

Test Plan: build with ghc-7.10.1

Reviewers: austin, bgamari, dfeuer

Reviewed By: dfeuer

Subscribers: dfeuer, thomie

Differential Revision: https://phabricator.haskell.org/D2976

GHC Trac Issues: #13120

David Feuer authored Jan 17, 2017 and Ben Gamari committed Jan 17, 2017

Previously, `mkInlineUnfolding` took a `Maybe` argument indicating
whether the caller requested a specific arity.  This was not
self-documenting at call sites. Now we distinguish between
`mkInlineUnfolding` and `mkInlineUnfoldingWithArity`.

Reviewers: simonpj, austin, bgamari

Reviewed By: simonpj, bgamari

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2933

Rufflewind authored Jan 17, 2017 and Ben Gamari committed Jan 17, 2017

    In module ‘Prelude’:
      ‘True’ is a data constructor of ‘Bool’
    To import it use
      ‘import’ Prelude( Bool( True ) )

The quotes around `import` don't make any sense.

Test Plan: manual

Reviewers: austin, mpickering, bgamari

Reviewed By: mpickering, bgamari

Subscribers: dfeuer, thomie

Differential Revision: https://phabricator.haskell.org/D2935

Ben Gamari authored Jan 17, 2017 and Ben Gamari committed Jan 17, 2017

This fixes #12038, where the TimerManager would attempt to wake up a
manager that was already dead, resulting in setnumcapabilities001
occassionally failing during shutdown with unexpected output on stderr.

I'm frankly still not entirely confident in this solution but perhaps it
will help to get a few more eyes on this.

My hypothesis is that the TimerManager is racing:

  thread                   TimerManager worker
  -------                  --------------------
  requests that thread
  manager shuts down

                           begins to clean up,
                           closing eventfd

  calls wakeManager,
  which tries to write
  to closed eventfd

To prevent this `wakeManager` will need to synchronize with the
TimerManger worker to ensure that the worker doesn't clean up the
`Control` while another thread is trying to send a wakeup. However, this
would add a bit of overhead on every timer interaction, which feels
rather costly for what is really a problem only at shutdown.  Moreover,
it seems that the event manager (e.g.  `GHC.Event.Manager`) is also
afflicted by a similar race.

This patch instead simply tries to catch the write failure after it has
happened and silence it in the case that the fd has vanished. It feels
rather hacky but it seems to work.

Test Plan: Run `setnumcapabilities001` repeatedly

Reviewers: hvr, austin, simonmar

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2957

GHC Trac Issues: #12038

Simon Marlow authored Jan 17, 2017 and Ben Gamari committed Jan 17, 2017

Test Plan: Built it and looked at it

Reviewers: niteria, erikd, dfeuer, austin, hvr, bgamari

Reviewed By: bgamari

Subscribers: dfeuer, thomie, erikd

Differential Revision: https://phabricator.haskell.org/D2959

Unfortunately it's not clear why but this has been failing on Harbormaster.

Ben Gamari authored Jan 11, 2017 and Ben Gamari committed Jan 17, 2017

These are producing StgWords so foldl' is the natural choice. I'm not
sure how I didn't notice this when I wrote D1041.

Test Plan: Validate

Reviewers: austin, simonmar

Reviewed By: simonmar

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2955

GHC Trac Issues: #7450

Ben Gamari authored Jan 17, 2017 and Ben Gamari committed Jan 17, 2017

Some operating systems (e.g. Darwin) have very poor file timestamp
resolution.  On these systems GHC often fails to notice that B.hs
changes in this testsuite, leading to sporatic test failures. Add a
sleep to ensure the change is noticed.

Test Plan: Validate

Reviewers: ezyang, austin

Subscribers: mpickering, gracjan, thomie

Differential Revision: https://phabricator.haskell.org/D2964

An unboxed tuple such as

    (# | b | | | | | #)

Ends up in the parser via `tup_exprs` as

    Sum 2 7 lexp

where `lexp` is a `LHsExpr`

From an API annotation perspective, the 5 `AnnVbar`s after the `b` were attached
to `lexp`, but the leading `AnnVbar`s did not have a home.

This patch attaches them all to the the parent tuple expression. The first (alt
- 1) of them come before `lexp`, and the remaining (arity - alt) come after.

Test Plan: ./validate

Reviewers: osa1, austin, bgamari

Subscribers: thomie, mpickering

Differential Revision: https://phabricator.haskell.org/D2968

GHC Trac Issues: #12417