3 years agoOnly add -fshow-warning-groups for ghc >= 7.11 (#10752)
Thomas Miedema [Mon, 29 Feb 2016 12:49:05 +0000 (13:49 +0100)] 
Only add -fshow-warning-groups for ghc >= 7.11 (#10752)

3 years agoRemove some more Windows line endings [skip ci]
Thomas Miedema [Tue, 23 Feb 2016 03:43:58 +0000 (04:43 +0100)] 
Remove some more Windows line endings [skip ci]

3 years agoTestsuite: check actual_prof_file only when needed
Thomas Miedema [Fri, 26 Feb 2016 10:23:28 +0000 (11:23 +0100)] 
Testsuite: check actual_prof_file only when needed

Might be a little faster. Avoids testing for #6113 (.prof file not
written when process is killed with any signal but SIGINT) for tests
that don't have a .prof.sample file (which is almost all of them) when
running the profiling ways.
Tests that were failing because of #6113: T8089, overflow1, overflow2 and

3 years agoDynFlags: Add -Wredundant-constraints to -Wall
Ben Gamari [Mon, 29 Feb 2016 11:28:49 +0000 (12:28 +0100)] 
DynFlags: Add -Wredundant-constraints to -Wall

Test Plan: It works, I promise.

Reviewers: austin

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11370

3 years agoBuild system: Correctly pass `TARGETPLATFORM` as host
Nicolas Trangez [Mon, 29 Feb 2016 10:56:33 +0000 (11:56 +0100)] 
Build system: Correctly pass `TARGETPLATFORM` as host

When building the bundled GMP sources, the `HOSTPLATFORM` value was
passed to the `--host` flag of the `./configure` call. This is
incorrect: when building a cross-compiler, e.g. a compiler targeting
ARM but running on X86, the host on which GMP will run is ARM, i.e.
the target platform of the compiler, and the host platform (i.e. the
platform on which the compiler will run) is X86.

See e.g. [1] for more information about the meaning of and relation
between build, host and target.


Test Plan: Building ARM cross-compiler with `integer-gmp`

Reviewers: thomie, gracjan, austin, erikd, Phyx, hvr, bgamari

Reviewed By: erikd, bgamari

Subscribers: erikd, gracjan

Differential Revision:

3 years agoRefactor `warnMissingSignatures` in `RnNames.hs`
Rik Steenkamp [Mon, 29 Feb 2016 10:56:16 +0000 (11:56 +0100)] 
Refactor `warnMissingSignatures` in `RnNames.hs`

Reviewers: austin, thomie, bgamari

Reviewed By: thomie, bgamari

Differential Revision:

3 years agoFix bug where reexports of wired-in packages don't work.
Edward Z. Yang [Mon, 29 Feb 2016 10:53:34 +0000 (11:53 +0100)] 
Fix bug where reexports of wired-in packages don't work.

Signed-off-by: Edward Z. Yang <>
Test Plan: validate

Reviewers: hvr, bgamari, austin

Reviewed By: bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11589

3 years agobase: Mark Data.Type.Equality as Trustworthy
Ben Gamari [Mon, 29 Feb 2016 11:29:25 +0000 (12:29 +0100)] 
base: Mark Data.Type.Equality as Trustworthy

Test Plan: Validate

Reviewers: austin, ekmett, hvr

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11625

3 years agoMissing Proxy instances, make U1 instance more Proxy-like
RyanGlScott [Mon, 29 Feb 2016 11:28:18 +0000 (12:28 +0100)] 
Missing Proxy instances, make U1 instance more Proxy-like

This accomplishes three things:

* Adds missing `Alternative`, `MonadPlus`, and `MonadZip` instances for
* Adds a missing `MonadPlus` instance for `U1`
* Changes several existing `U1` instances to use lazy pattern-matching,
  exactly how `Proxy` does it (in case we ever replace `U1` with
  `Proxy`). This is technically a breaking change (albeit an extremely
  minor one).

Test Plan: ./validate

Reviewers: austin, ekmett, hvr, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11650

3 years agoDefault to -fno-show-warning-groups (re #10752)
Herbert Valerio Riedel [Sat, 27 Feb 2016 22:36:11 +0000 (23:36 +0100)] 
Default to -fno-show-warning-groups (re #10752)

As `-fno-show-warning-groups` shows associated warning groups regardless
of whether the respective warning group flag as been passed on the CLI,
the warning-group information may be confusing to users.

At this point, `-fshow-warning-groups` is useful mostly to GHC
developers and possibly GHC users who want to see which warning groups
an emitted warning is part of. (Btw, this is particularly interesting in
combination with `-Weverything` which enables *every* warning flag known
to GHC.)

Consequently, starting with this commit, one has to opt-in via
`-fshow-warning-groups` for GHC to show warning groups.

In order to reduce the testsuite delta in this commit, the
`-fshow-warning-groups` flag has been added to TEST_HC_OPTS.

3 years agoAnnotate `[-Wdeferred-type-errors]` in warnings (re #10752)
Herbert Valerio Riedel [Sat, 27 Feb 2016 18:45:11 +0000 (19:45 +0100)] 
Annotate `[-Wdeferred-type-errors]` in warnings (re #10752)

This was missed in bb5afd3c274011c5ea302210b4c290ec1f83209c

3 years agoPrint which flag controls emitted SafeHaskell warnings
Herbert Valerio Riedel [Sat, 27 Feb 2016 17:48:04 +0000 (18:48 +0100)] 
Print which flag controls emitted SafeHaskell warnings

This is extends bb5afd3c274011c5ea302210b4c290ec1f83209c to cover
SafeHaskell warnings.

This implements yet another part of #10752

3 years agoAnnotate `[-Wredundant-constraints]` in warnings (re #10752)
Herbert Valerio Riedel [Sat, 27 Feb 2016 17:26:32 +0000 (18:26 +0100)] 
Annotate `[-Wredundant-constraints]` in warnings (re #10752)

This was missed in bb5afd3c274011c5ea302210b4c290ec1f83209c

3 years agoPrint which flag controls emitted lexer warnings
Herbert Valerio Riedel [Sat, 27 Feb 2016 16:34:14 +0000 (17:34 +0100)] 
Print which flag controls emitted lexer warnings

This is extends bb5afd3c274011c5ea302210b4c290ec1f83209c to cover
warnings emitted during lexing.

This implements another part of #10752

3 years agoPrint which flag controls emitted desugaring warnings
Herbert Valerio Riedel [Sat, 27 Feb 2016 12:50:10 +0000 (13:50 +0100)] 
Print which flag controls emitted desugaring warnings

This is extends bb5afd3c274011c5ea302210b4c290ec1f83209c to cover
warnings emitted during the desugaring phase.

This implements another part of #10752

Reviewed-by: quchen, bgamari
Differential Revision:

3 years agorts: drop unused global 'blackhole_queue'
Sergei Trofimovich [Sat, 27 Feb 2016 14:44:45 +0000 (14:44 +0000)] 
rts: drop unused global 'blackhole_queue'

Commit 5d52d9b64c21dcf77849866584744722f8121389 removed
global 'blackhole_queue' in favour of new mechanism:
when TSO hits blackhole TSO blocks waiting for
'MessgaeBlackhole' delivery.

Patch removed unused global and updates stale comments.
Noticed by Yuras Shumovich.

Signed-off-by: Sergei Trofimovich <>
Test Plan: build test

Reviewers: simonmar, austin, Yuras, bgamari

Reviewed By: Yuras, bgamari

Subscribers: thomie

Differential Revision:

3 years agoGHC.Generics: Ensure some, many for U1 don't bottom
Ben Gamari [Fri, 26 Feb 2016 22:02:31 +0000 (23:02 +0100)] 
GHC.Generics: Ensure some, many for U1 don't bottom

Reviewers: austin, hvr, ekmett, RyanGlScott

Reviewed By: RyanGlScott

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11650

3 years agoUpdate transformer submodule to v0.5.2.0 release
Herbert Valerio Riedel [Wed, 17 Feb 2016 17:23:08 +0000 (18:23 +0100)] 
Update transformer submodule to v0.5.2.0 release

Most notably, this update pulls in documentation improvements
and several INLINE pragmas for significant performance gains[1].


3 years agoTest Trac #11611
Simon Peyton Jones [Fri, 26 Feb 2016 17:45:18 +0000 (17:45 +0000)] 
Test Trac #11611

3 years agoFilter out BuiltinRules in occurrence analysis
Simon Peyton Jones [Fri, 26 Feb 2016 17:12:52 +0000 (17:12 +0000)] 
Filter out BuiltinRules in occurrence analysis

Fixes Trac #11651.  Merge to 8.0.

3 years agoFix kind generalisation for pattern synonyms
Simon Peyton Jones [Fri, 26 Feb 2016 09:20:12 +0000 (09:20 +0000)] 
Fix kind generalisation for pattern synonyms

We were failing to zonk, after quantifyTyVars, and that left
un-zonked type variables in the final PatSyn.

This fixes the patsyn/ problems in Trac #11648, but not
the polykinds/ ones.

3 years agoComments and white space only
Simon Peyton Jones [Fri, 26 Feb 2016 09:07:39 +0000 (09:07 +0000)] 
Comments and white space only

3 years agoExclude TyVars from the constraint solver
Simon Peyton Jones [Fri, 26 Feb 2016 09:02:07 +0000 (09:02 +0000)] 
Exclude TyVars from the constraint solver

There is a general invariant that the constraint solver doesn't see
TyVars, only TcTyVars.  But when checking the generic-default
signature of a class, we called checkValidType on the generic-default
type, which had the class TyVar free. That in turn meant that it wasn't
considered during flattening, which led to the error reported in
Trac #11608.

The fix is simple: call checkValidType on the /closed/ type. Easy.

While I was at it, I added a bunch of ASSERTs about the TcTyVar

3 years agoGet the right in-scope set in specUnfolding
Simon Peyton Jones [Thu, 25 Feb 2016 15:55:56 +0000 (15:55 +0000)] 
Get the right in-scope set in specUnfolding

This fixes Trac #11600

3 years agoSpecial case for desugaring AbsBinds
Simon Peyton Jones [Thu, 25 Feb 2016 15:53:59 +0000 (15:53 +0000)] 
Special case for desugaring AbsBinds

When AbsBinds has no tyvars and no dicts, a rather simpler
desugaring is possible.  This patch implements it.

I don't think the optimised code changes, but there is
less clutter generated.

3 years agoFix and refactor strict pattern bindings
Simon Peyton Jones [Thu, 25 Feb 2016 15:53:03 +0000 (15:53 +0000)] 
Fix and refactor strict pattern bindings

This patch was triggered by Trac #11601, where I discovered that
-XStrict was really not doing the right thing. In particular,

  f y = let !(Just x) = blah[y] in body[y,x]

This was evaluating 'blah' but not pattern matching it
against Just until x was demanded.  This is wrong.

The patch implements a new semantics which ensures that strict
patterns (i.e. ones with an explicit bang, or with -XStrict)
are evaluated fully when bound.

* There are extensive notes in DsUtils:
  Note [mkSelectorBinds]

* To do this I found I need one-tuples;
  see Note [One-tuples] in TysWiredIn

I updated the user manual to give the new semantics

3 years agoTypos in comments, etc.
Gabor Greif [Fri, 26 Feb 2016 14:48:10 +0000 (15:48 +0100)] 
Typos in comments, etc.

3 years agoUnconditionally handle TH known key names.
Edward Z. Yang [Thu, 25 Feb 2016 20:47:30 +0000 (21:47 +0100)] 
Unconditionally handle TH known key names.

Previously, we didn't add Template Haskell key names to the list
of known uniques when building a stage 1 compiler.  But with
f16ddcee0c64a92ab911a7841a8cf64e3ac671fd we may refer to TH
names even in stage 1, and this was causing uniques to not
be setup properly.

Signed-off-by: Edward Z. Yang <>
Test Plan: validate and run stage1 test suite

Reviewers: osa1, austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #10382

3 years agoPrint which warning-flag controls an emitted warning
Michael Walker [Thu, 25 Feb 2016 16:34:07 +0000 (17:34 +0100)] 
Print which warning-flag controls an emitted warning

Both gcc and clang tell which warning flag a reported warning can be
controlled with, this patch makes ghc do the same. More generally, this
allows for annotated compiler output, where an optional annotation is
displayed in brackets after the severity.

This also adds a new flag `-f(no-)show-warning-groups` to control
whether to show which warning-group (such as `-Wall` or `-Wcompat`)
a warning belongs to. This flag is on by default.

This implements #10752

Reviewed By: quchen, bgamari, hvr

Differential Revision:

3 years agoTestsuite: do not write empty files on 'make accept'
Thomas Miedema [Tue, 23 Feb 2016 20:29:59 +0000 (21:29 +0100)] 
Testsuite: do not write empty files on 'make accept'

Also prevent showing '\ No newline at end of file' in diff output.

3 years agoTestsuite: delete empty files [skip ci]
Thomas Miedema [Tue, 23 Feb 2016 20:37:22 +0000 (21:37 +0100)] 
Testsuite: delete empty files [skip ci]

3 years agoMark tests for #11643, #11644, #11645 and #9406 expect_broken
Thomas Miedema [Thu, 25 Feb 2016 13:15:41 +0000 (14:15 +0100)] 
Mark tests for #11643, #11644, #11645 and #9406 expect_broken

For opt_ways or prof_ways only.

indexed-types/should_compile/all.T called setTestOpts to not run
the tests with opt_ways. Since I'm finding regressions for opt_ways, I
removed it. This only makes a difference when running
`./validate --slow` or `make slowtest`.

Update submodule hpc.

3 years agoTestsuite: for tests that use TH, omit *all* prof_ways
Thomas Miedema [Mon, 22 Feb 2016 17:55:30 +0000 (18:55 +0100)] 
Testsuite: for tests that use TH, omit *all* prof_ways

Instead of just profasm and profthreaded. And at least until
-fexternal-interpreter is the default.

  * WAY=profc doesn't exist anymore.
  * Omit all threaded_ways for conc039, not just a few.

3 years agoTestsuite: Introduce config.plugin_way_flags.
Thomas Miedema [Thu, 25 Feb 2016 00:00:48 +0000 (01:00 +0100)] 
Testsuite: Introduce config.plugin_way_flags.

Refactoring only.

3 years agoImprove pattern synonym error messages (add `PatSynOrigin`)
Rik Steenkamp [Thu, 25 Feb 2016 18:27:54 +0000 (19:27 +0100)] 
Improve pattern synonym error messages (add `PatSynOrigin`)

Adds a new data constructor `PatSynOrigin Bool Name` to the `CtOrigin`
data type. This allows for better error messages when the origin of a
wanted constraint is a pattern synonym declaration.

Fixes T10873.

Reviewers: mpickering, simonpj, austin, thomie, bgamari

Reviewed By: simonpj, thomie, bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #10873

3 years agoNote new GHC.Generics instances in release notes
Ben Gamari [Thu, 25 Feb 2016 18:26:46 +0000 (19:26 +0100)] 
Note new GHC.Generics instances in release notes

3 years agoImprove accuracy of suggestion to use TypeApplications
Matthew Pickering [Thu, 25 Feb 2016 14:51:46 +0000 (15:51 +0100)] 
Improve accuracy of suggestion to use TypeApplications

The suggestion only makes sense when we try
to use an as pattern in an expression context.

It is misleading in the case of a lazy pattern and
view pattern.

Reviewers: austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision:

3 years agoHandle multiline named haddock comments properly
Thomas Miedema [Thu, 25 Feb 2016 14:51:38 +0000 (15:51 +0100)] 
Handle multiline named haddock comments properly

Fixes #10398 in a different way, thereby also fixing #11579.

I inverted the logic of the Bool argument to "worker", to hopefully make
it more self-explanatory.

Reviewers: austin, hvr, bgamari

Reviewed By: bgamari

Differential Revision:

3 years ago(Alternative way to) address #8710
George Karachalias [Thu, 25 Feb 2016 14:50:35 +0000 (15:50 +0100)] 
(Alternative way to) address #8710

Issue a separate warning per redundant (or inaccessible) clause.
This way each warning can have more precice location information
(the location of the clause under consideration and not the whole

I thought that this could be too much but actually the number of
such warnings is bound by the number of cases matched against (in
contrast to the non-exhaustive warnings which may be exponentially

Test Plan: validate

Reviewers: simonpj, austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #8710

3 years agocmpTypeX: Avoid kind comparison when possible
Ben Gamari [Thu, 25 Feb 2016 14:44:20 +0000 (15:44 +0100)] 
cmpTypeX: Avoid kind comparison when possible

This comparison is only necessary when the types being compared contain
casts. Otherwise the structural equality of the types implies that their
kinds are equal.

Test Plan: Validate

Reviewers: goldfire, austin, simonpj

Reviewed By: simonpj

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11597

3 years agoBump haddock.base allocations
Ben Gamari [Thu, 25 Feb 2016 14:35:25 +0000 (15:35 +0100)] 
Bump haddock.base allocations

I believe this is probably due to the recent RuntimeRep change.

3 years agoReconstruct record expression in bidir pattern synonym
Matthew Pickering [Thu, 25 Feb 2016 13:52:39 +0000 (14:52 +0100)] 
Reconstruct record expression in bidir pattern synonym

Reviewers: austin, rdragon, bgamari

Reviewed By: bgamari

Subscribers: rdragon, thomie

Differential Revision:

3 years agoMake warning names more consistent
Manav Rathi [Thu, 25 Feb 2016 13:51:32 +0000 (14:51 +0100)] 
Make warning names more consistent

- Replace "Sigs" with "Signatures" in WarningFlag data constructors.
- Replace "PatSyn" with "PatternSynonym" in WarningFlag data
- Deprecate "missing-local-sigs" in favor of "missing-local-signatures".
- Deprecate "missing-exported-sigs" in favor of
- Deprecate "missing-pat-syn-signatures" in favor of
- Replace "ddump-strsigs" with "ddump-str-signatures"

These complete the tasks that were explicitly mentioned in #11583

Test Plan:
Executed `ghc --show-options` and verified that the flags were changed
as expected.

Reviewers: svenpanne, austin, bgamari

Reviewed By: austin, bgamari

Subscribers: mpickering, thomie

Differential Revision:

GHC Trac Issues: #11583

3 years agoAdd more type class instances for GHC.Generics
RyanGlScott [Thu, 25 Feb 2016 13:49:48 +0000 (14:49 +0100)] 
Add more type class instances for GHC.Generics

GHC.Generics provides several representation data types that have
obvious instances of various type classes in base, along with various
other types of meta-data (such as associativity and fixity).
Specifically, instances have been added for the following type classes
(where possible):

    - Applicative
    - Data
    - Functor
    - Monad
    - MonadFix
    - MonadPlus
    - MonadZip
    - Foldable
    - Traversable
    - Enum
    - Bounded
    - Ix
    - Generic1

Thanks to ocharles for starting this!

Test Plan: Validate

Reviewers: ekmett, austin, hvr, bgamari

Reviewed By: bgamari

Subscribers: RyanGlScott, thomie

Differential Revision:

GHC Trac Issues: #9043

3 years agoHscMain: Delete some unused code
Ömer Sinan Ağacan [Thu, 25 Feb 2016 13:47:47 +0000 (14:47 +0100)] 
HscMain: Delete some unused code

Reviewers: bgamari, austin

Reviewed By: austin

Subscribers: thomie

Differential Revision:

3 years agoApplicativeDo: Handle terminal `pure` statements
Ben Gamari [Thu, 25 Feb 2016 13:47:34 +0000 (14:47 +0100)] 
ApplicativeDo: Handle terminal `pure` statements

ApplicativeDo handled terminal `return` statements properly, but not

Test Plan: Validate with included testcase

Reviewers: austin, simonmar

Reviewed By: austin, simonmar

Subscribers: simonpj, thomie

Differential Revision:

GHC Trac Issues: #11607

3 years agobase: A selection of fixes to the comments in GHC.Stats
David Turner [Thu, 25 Feb 2016 13:46:28 +0000 (14:46 +0100)] 
base: A selection of fixes to the comments in GHC.Stats

Use `-- |` comments throughout.
Note that numByteUsageSamples is also the number of major GCs
Note that numGcs counts GCs for all generations
Note that 'current' really means 'at the end of the last major GC'

Reviewers: ezyang, hvr, simonmar, austin, bgamari

Reviewed By: ezyang, simonmar, bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11603

3 years agotestsuite: mark tests broken on powerpc64
Peter Trommler [Thu, 25 Feb 2016 13:46:13 +0000 (14:46 +0100)] 
testsuite: mark tests broken on powerpc64

The following tests fail on powerpc64 and have a ticket.
Mark those tests as expect_broken.

Here are the details:
The PowerPC native code generator does not support DWARF debug
information. This is tracked in ticket #11261. Mark the respective
tests broken on powerpc64.

testsuite: mark print022 broken on powerpc64
Ticket #11262 tracks difference in stdout for print022.

testsuite: mark recomp015 broken on powerpc64
testsuite: mark recomp011 broken on powerpc64
This is tracked as ticket #11323 and #11260.

testsuite: mark linker tests broken on powerpc64
Ticket #11259 tracks tests failing because there is no RTS
linker on powerpc64.

Test Plan: validate

Reviewers: erikd, austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11259, #11260, #11261, #11262, #11323

3 years agoOverload the static form to reduce verbosity.
Facundo Domínguez [Thu, 25 Feb 2016 13:33:43 +0000 (14:33 +0100)] 
Overload the static form to reduce verbosity.

Static pointers are rarely used naked: most often they are defined at
the base of a Closure, as defined in e.g. the distributed-closure and
distributed-static packages. So a typical usage pattern is:

    distributeMap (closure (static (\x -> x * 2)))

which is more verbose than it needs to be. Ideally we'd just have to

    distributeMap (static (\x -> x * 2))

and let the static pointer be lifted to a Closure implicitly. i.e.
what we want is to overload static literals, just like we already
overload list literals and string literals.

This is achieved by introducing the IsStatic type class and changing
the typing rule for static forms slightly:

    static (e :: t) :: IsStatic p => p t

Test Plan: ./validate

Reviewers: austin, hvr, bgamari

Reviewed By: bgamari

Subscribers: simonpj, mboes, thomie

Differential Revision:

GHC Trac Issues: #11585

3 years agoTyCoRep: Add haddock sections
Ben Gamari [Wed, 24 Feb 2016 10:20:26 +0000 (11:20 +0100)] 
TyCoRep: Add haddock sections

3 years agoRemove "use mask" from StgAlt syntax
Ömer Sinan Ağacan [Wed, 24 Feb 2016 21:22:36 +0000 (16:22 -0500)] 
Remove "use mask" from StgAlt syntax

Reviewers: austin, bgamari, simonpj

Reviewed By: simonpj

Subscribers: thomie

Differential Revision:

3 years agoAddress #11471 by putting RuntimeRep in kinds.
Richard Eisenberg [Thu, 4 Feb 2016 15:42:56 +0000 (10:42 -0500)] 
Address #11471 by putting RuntimeRep in kinds.

See Note [TYPE] in TysPrim. There are still some outstanding
pieces in #11471 though, so this doesn't actually nail the bug.

This commit also contains a few performance improvements:

* Short-cut equality checking of nullary type syns

* Compare types before kinds in eqType

* INLINE coreViewOneStarKind

* Store tycon binders separately from kinds.

This resulted in a ~10% performance improvement in compiling
the Cabal package. No change in functionality other than
performance. (This affects the interface file format, though.)

This commit updates the haddock submodule.

3 years agoFollow-up to 32a9a7f514bdd33ff72a673ade
Herbert Valerio Riedel [Tue, 23 Feb 2016 22:55:23 +0000 (23:55 +0100)] 
Follow-up to 32a9a7f514bdd33ff72a673ade

...forgot to stage/add this alpha renaming to the previous commit

3 years agoExtend `-Wunrecognised-warning-flag` to cover `-f(no-)warn-*`
Herbert Valerio Riedel [Tue, 23 Feb 2016 22:13:33 +0000 (23:13 +0100)] 
Extend `-Wunrecognised-warning-flag` to cover `-f(no-)warn-*`

The original implementation for #11429 covers only `-W*` flags. However,
old packages will continue to use `-f(no-)warn-*` flags, so it seems
desirable to have `-Wunrecognised-warning-flag` apply to those legacy aliases
as well.

Reviewed By: bgamari

Differential Revision:

3 years agoTestsuite: MAKEFLAGS is magic, do not unexport it
Thomas Miedema [Tue, 23 Feb 2016 18:27:43 +0000 (19:27 +0100)] 
Testsuite: MAKEFLAGS is magic, do not unexport it

Call `+$(PYTHON) ...` to fix #11569 instead.

See Note [Communicating options and variables to a submake].

3 years agoAllow combining characters in identifiers (#7650)
Thomas Miedema [Sat, 20 Feb 2016 22:50:28 +0000 (23:50 +0100)] 
Allow combining characters in identifiers (#7650)

Reviewed by: austin, rwbarton

Differential Revision:

3 years agoTestsuite: failing profiling tests (#10037)
Thomas Miedema [Mon, 22 Feb 2016 16:57:43 +0000 (17:57 +0100)] 
Testsuite: failing profiling tests (#10037)

These tests fail not only for WAY=prof, but also for WAY=profllvm.

3 years agoFilter out -prof callstacks from test output (#11521)
Thomas Miedema [Mon, 22 Feb 2016 16:44:17 +0000 (17:44 +0100)] 
Filter out -prof callstacks from test output (#11521)

3 years agoTestsuite: cleanup profiling/should_run/all.T (#11521)
Thomas Miedema [Sun, 21 Feb 2016 12:40:56 +0000 (13:40 +0100)] 
Testsuite: cleanup profiling/should_run/all.T (#11521)

Refactoring only. I compared before and after with 'make slow', and it
still runs each test with the same 'ways' as before.

3 years agoTestsuite: delete Windows line endings [skip ci] (#11631)
Thomas Miedema [Mon, 22 Feb 2016 20:32:51 +0000 (21:32 +0100)] 
Testsuite: delete Windows line endings [skip ci] (#11631)

3 years agoTestsuite: delete Windows line endings [skip ci] (#11631)
Thomas Miedema [Mon, 22 Feb 2016 20:32:51 +0000 (21:32 +0100)] 
Testsuite: delete Windows line endings [skip ci] (#11631)

3 years agoTestsuite: accept output without Windows line endings (#11631)
Thomas Miedema [Tue, 23 Feb 2016 01:25:17 +0000 (02:25 +0100)] 
Testsuite: accept output without Windows line endings (#11631)

3 years agoTestsuite: accept output without Windows line endings (#11631)
Thomas Miedema [Tue, 23 Feb 2016 01:57:53 +0000 (02:57 +0100)] 
Testsuite: accept output without Windows line endings (#11631)

3 years agoTestsuite: delete Windows line endings [skip ci] (#11631)
Thomas Miedema [Mon, 22 Feb 2016 20:32:51 +0000 (21:32 +0100)] 
Testsuite: delete Windows line endings [skip ci] (#11631)

3 years agoTestsuite: delete Windows line endings [skip ci] (#11631)
Thomas Miedema [Mon, 22 Feb 2016 20:32:51 +0000 (21:32 +0100)] 
Testsuite: delete Windows line endings [skip ci] (#11631)

3 years agoTestsuite: delete Windows line endings [skip ci] (#11631)
Thomas Miedema [Mon, 22 Feb 2016 20:32:51 +0000 (21:32 +0100)] 
Testsuite: delete Windows line endings [skip ci] (#11631)

3 years agoTestsuite: delete Windows line endings [skip ci] (#11631)
Thomas Miedema [Mon, 22 Feb 2016 20:31:35 +0000 (21:31 +0100)] 
Testsuite: delete Windows line endings [skip ci] (#11631)

3 years agoTestsuite: delete Windows line endings [skip ci] (#11631)
Thomas Miedema [Mon, 22 Feb 2016 20:31:24 +0000 (21:31 +0100)] 
Testsuite: delete Windows line endings [skip ci] (#11631)

3 years agoAdd missing files
Simon Marlow [Tue, 23 Feb 2016 09:05:37 +0000 (09:05 +0000)] 
Add missing files

3 years agoDocs: -keep-llvm-file(s)/-ddump-llvm imply -fllvm
Thomas Miedema [Mon, 22 Feb 2016 13:31:40 +0000 (14:31 +0100)] 
Docs: -keep-llvm-file(s)/-ddump-llvm imply -fllvm

This fixes #9917.

3 years agoFix GHC.Stats documentation markup (#11619)
Thomas Miedema [Sun, 21 Feb 2016 17:31:00 +0000 (18:31 +0100)] 
Fix GHC.Stats documentation markup (#11619)

3 years agoBuild system: fix sed expression (#11537)
Thomas Miedema [Sun, 21 Feb 2016 11:23:25 +0000 (12:23 +0100)] 
Build system: fix sed expression (#11537)

This allows building ghc in '/ghc'.

3 years agoTestsuite: pass '-s --no-print-directory' to MAKE
Thomas Miedema [Sun, 21 Feb 2016 00:50:22 +0000 (01:50 +0100)] 
Testsuite: pass '-s --no-print-directory' to MAKE

This seems necessary after 9634e24 (#11569).

3 years agoAdd test for #6132: hash bang + CPP
Thomas Miedema [Sat, 20 Feb 2016 22:07:50 +0000 (23:07 +0100)] 
Add test for #6132: hash bang + CPP

3 years agounexport MAKEFLAGS when running tests (#11569)
Thomas Miedema [Sat, 20 Feb 2016 20:09:12 +0000 (21:09 +0100)] 
unexport MAKEFLAGS when running tests (#11569)

3 years agoAdd test (only) to assure that #11535 is fixed
Takayuki Muranushi [Sat, 20 Feb 2016 12:28:32 +0000 (13:28 +0100)] 
Add test (only) to assure that #11535 is fixed

Ticket #11535 dealt with derived Read instances of infix Unicode
value constructors. GHC 7.10.3 used to derive (Read/Show)
instances so that `read . show` for values of such types had no

The issue has been fixed by other compiler update. This patch
adds only tests, so that derived instance of Read/Show for infix
Unicode value constructors has correct parse, satisfying Haskell
2010 Specification.

Resolves: #11535

Test Plan: `make test TEST=T11535`

Reviewers: austin, rwbarton, thomie, bgamari

Reviewed By: rwbarton, thomie, bgamari

Subscribers: rwbarton, thomie

Projects: #ghc

Differential Revision:

GHC Trac Issues: #11535

3 years agoUse a better test for profiling
Simon Marlow [Sat, 20 Feb 2016 08:25:50 +0000 (08:25 +0000)] 
Use a better test for profiling

The previous test failed for me because I had

    GhcRTSWays += thr_debug_p

in my, which doesn't enable profiling by itself.

3 years agoFix a double-free bug in -fexternal-interpreter
Simon Marlow [Sat, 20 Feb 2016 07:39:34 +0000 (07:39 +0000)] 
Fix a double-free bug in -fexternal-interpreter

Originally I planned to make this reference manually managed, but it
looks like at some point I gave it a finalizer on the GHC side, but
forgot to remove the manual free here.  The result is that ghc-iserv
could crash in getStablePtr sometimes when using TH.

3 years agoFix a bug in ApplicativeDo (#11612)
Simon Marlow [Sat, 20 Feb 2016 07:23:37 +0000 (07:23 +0000)] 
Fix a bug in ApplicativeDo (#11612)

In some cases ApplicativeDo would miss some opportunities, due to a
wrong calculation of free variables in RnExpr.segments.

3 years agoRefactoring only: use ExprLStmt
Simon Marlow [Sat, 20 Feb 2016 06:59:10 +0000 (06:59 +0000)] 
Refactoring only: use ExprLStmt

3 years agoDocs: no space in `-i⟨dir1⟩:⟨dir2⟩` [skip ci]
Thomas Miedema [Fri, 19 Feb 2016 17:58:03 +0000 (18:58 +0100)] 
Docs: no space in `-i⟨dir1⟩:⟨dir2⟩` [skip ci]

3 years agoPass -haddock to tests in should_compile_*flag*_nohaddock
Thomas Miedema [Fri, 19 Feb 2016 16:37:29 +0000 (17:37 +0100)] 
Pass -haddock to tests in should_compile_*flag*_nohaddock

should_compile_flag_nohaddock and should_compile_noflag_nohaddock
contain the exact same tests. By passing `-haddock` to the tests in
should_compile_**flag**_nohaddock, at least they're now testing
different things.

Add documentation.

3 years agoModifier letter in middle of identifier is ok
Thomas Miedema [Fri, 19 Feb 2016 14:25:40 +0000 (15:25 +0100)] 
Modifier letter in middle of identifier is ok

Refactoring only. Cleanup some loose ends from #10196.

Initially the idea was to only allow modifier letters at the end of
identifiers. Since we later decided to allow modifier letters also in
the middle of identifiers (because not doing so would not fix the
regression completely), the names `suffix` and `okIdSuffixChar` don't
seem appropriate anymore.

Remove TODO. Move test from should_fail to should_compile.

3 years agoDelete support for deprecated "-- # ..."-style haddock options
Thomas Miedema [Fri, 19 Feb 2016 09:27:02 +0000 (10:27 +0100)] 
Delete support for deprecated "-- # ..."-style haddock options

A long time ago, you could use `"-- # <haddock options>"` to mean that
`<haddock options.` should be passed to `haddock`. Since 2007
(03d8585e0940e28e024548654fe3505685aca94f), using `OPTIONS_HADDOCK` is
the preferred way to do this.

Why is ok to remove support for "-- # .."?

* It is not mentioned in the Haddock user's guide, nor are there any
  tests that use it.

* Ever since 2011 (b3e30449aa6d6eaa978eb3c7447ca85985d9d251), it doesn't
  actually work anymore. The function `getOptionsFromFile` uses
  `gopt_unset dflags Opt_Haddock` for other reasons, so even when
  running ghc with `--haddock`, the following rule always fires when the
  lexer sees "-- # ..", and it gets treated as a normal comment:

    -- Next, match Haddock comments if no -haddock flag
    "-- " [$docsym \#] .* / { ifExtension (not . haddockEnabled) } { lineCommentToken }

Reviewed by: bgamari

Differential Revision:

3 years agoA few more typos in non-code
Gabor Greif [Fri, 19 Feb 2016 11:57:03 +0000 (12:57 +0100)] 
A few more typos in non-code

3 years agoBump haddock submodule
Ben Gamari [Thu, 18 Feb 2016 22:16:19 +0000 (23:16 +0100)] 
Bump haddock submodule

3 years agoUnwire Typeable representation types
Ben Gamari [Thu, 18 Feb 2016 21:05:02 +0000 (22:05 +0100)] 
Unwire Typeable representation types

In order to make this work I needed to shuffle around typechecking a bit
such that `TyCon` and friends are available during compilation of
GHC.Types.  I also did a bit of refactoring of `TcTypeable`.

Test Plan: Validate

Reviewers: simonpj, austin

Subscribers: simonpj, thomie

Differential Revision:

GHC Trac Issues: #11120

3 years agoTake type-function arity into account
Simon Peyton Jones [Thu, 18 Feb 2016 12:52:18 +0000 (12:52 +0000)] 
Take type-function arity into account

...when computing the size of a call on the RHS of a type
instance declaration.

This came up in Trac #11581.  The change is in
which now trims the type arguments in a call.  See the
comments with that function definition.

3 years agoImprove piResultTys and friends
Simon Peyton Jones [Thu, 18 Feb 2016 11:34:12 +0000 (11:34 +0000)] 
Improve piResultTys and friends

Several things here:

* Re-implement piResultTys so that its substitution has
  the correct in-scope set

  That means paying close attention to performance, since as we
  discovered in Trac #11371, it's a heavily used function and
  is often used on ordinary function types, with no foralls to
  worry about substituting.

* Kill off applyTys, which was just the same as piResultTys.

* Re-engineer MkCore.mkCoreApps so that it calls piResultTys,
  rather than repeatedly calling piResultTy.

3 years ago(Another) minor refactoring of substitutions
Simon Peyton Jones [Thu, 18 Feb 2016 11:25:38 +0000 (11:25 +0000)] 
(Another) minor refactoring of substitutions

No change in functionality here, but greater clarity:

* In FamInstEnv.FlattenEnv, kill off the fi_in_scope field
  We are already maintaining an in-scope set in the fe_subst field,
  so it's silly do to it twice.

  (This isn't strictly connected to the rest of this patch, but
  the nomenclature changes below affect the same code, so I put
  them together.)

* TyCoRep.extendTCVSubst used to take a TyVar or a CoVar and work
  out what to do, but in fact we almost always know which of the
  two we are doing.  So:
    - define extendTvSubst, extendCvSubst
    - and use them

* Similar renamings in TyCoRep:
   - extendTCvSubstList        -->   extendTvSubstList
   - extendTCvSubstBinder      -->   extendTvSubstBinder
   - extendTCvSubstAndInScope  --> extendTvSubstAndInScope

* Add Type.extendTvSubstWithClone, extendCvSubstWithClone

* Similar nomenclature changes in Subst, SimplEnv, Specialise

* Kill off TyCoRep.substTelescope (never used)

3 years agoFix desugaring of bang-pattern let-bindings
Simon Peyton Jones [Thu, 18 Feb 2016 11:05:45 +0000 (11:05 +0000)] 
Fix desugaring of bang-pattern let-bindings

When implementing Strict Haskell, the patch 46a03fbe didn't faithfully
implement the semantics given in the manual. In particular there was
an ad-hoc case in mkSelectorBinds for "strict and no binders" that
didn't work.

This patch fixes it, curing Trac #11572.

Howver it forced me to think about banged let-bindings, and I rather
think we do not have quite the right semantics yet, so I've opened
Trac #11601.

3 years agoFix thinko that crept into D1908
Ben Gamari [Wed, 17 Feb 2016 20:18:00 +0000 (21:18 +0100)] 
Fix thinko that crept into D1908

RyanGlScott updated the Diff only after I had merged it.

3 years agoComments only (#11513)
Richard Eisenberg [Wed, 17 Feb 2016 21:22:22 +0000 (16:22 -0500)] 
Comments only (#11513)

3 years agousers-guide: Fix typos
Mark Christiaens [Wed, 17 Feb 2016 13:04:42 +0000 (14:04 +0100)] 
users-guide: Fix typos

Reviewers: austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11590

3 years agoRemove superfluous code when deriving Foldable/Traversable
RyanGlScott [Wed, 17 Feb 2016 11:06:17 +0000 (12:06 +0100)] 
Remove superfluous code when deriving Foldable/Traversable

Currently, `-XDeriveFoldable` and `-XDeriveTraversable` generate
unnecessary `mempty` and `pure` expressions when it traverses of an
argument of a constructor whose type does not mention the last type
parameter. Not only is this inefficient, but it prevents `Traversable`
from being derivable for datatypes with unlifted arguments (see
Trac #11174).

The solution to this problem is to adopt a slight change to the
algorithms for `-XDeriveFoldable` and `-XDeriveTraversable`, which is
described in [this wiki
The wiki page also describes why we don't apply the same changes to the
algorithm for `-XDeriveFunctor`.

This is techincally a breaking change for users of `-XDeriveFoldable`
and `-XDeriveTraversable`, since if someone was using a law-breaking
`Monoid` instance with a derived `Foldable` instance (i.e., one where `x
<> mempty` does not equal `x`) or a law-breaking `Applicative` instance
with a derived `Traversable` instance, then the new generated code could
result in different behavior. I suspect the number of scenarios like
this is very small, and the onus really should be on those users to fix
up their `Monoid`/`Applicative` instances.

Fixes #11174.

Test Plan: ./validate

Reviewers: hvr, simonpj, austin, bgamari

Reviewed By: simonpj, bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11174

3 years agoDerive Eq and Ord instance for SrcLoc and RealSrcLoc
Gabriel Gonzalez [Wed, 17 Feb 2016 09:59:09 +0000 (10:59 +0100)] 
Derive Eq and Ord instance for SrcLoc and RealSrcLoc

The Eq and Ord instance were previously hand-written and this change
updates them to be automatically derived by the compiler.  The derived
behavior should be equivalent to the original.

Reviewers: hvr, austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision:

3 years agoFix #11313.
Richard Eisenberg [Wed, 10 Feb 2016 14:38:09 +0000 (09:38 -0500)] 
Fix #11313.

Previously, we looked through synonyms when counting arguments,
but that's a bit silly.

3 years agoFix #11246.
Richard Eisenberg [Wed, 10 Feb 2016 14:09:26 +0000 (09:09 -0500)] 
Fix #11246.

We have to instantiate any invisible arguments to type families
right away. This is now done in tcTyCon in TcHsType.

testcase: typecheck/should_compile/T11246

3 years agoFix #11241.
Richard Eisenberg [Wed, 10 Feb 2016 13:35:22 +0000 (08:35 -0500)] 
Fix #11241.

When renaming a type, now looks for wildcards in bound variables'

testcase: dependent/should_compile/T11241

3 years agoUse CoercionN and friends in TyCoRep
Richard Eisenberg [Wed, 10 Feb 2016 13:03:56 +0000 (08:03 -0500)] 
Use CoercionN and friends in TyCoRep