3 years agoAdjust error check for class method types ghc-8.0.1-rc4
Simon Peyton Jones [Fri, 15 Apr 2016 10:49:23 +0000 (11:49 +0100)] 
Adjust error check for class method types

Fixes Trac #11793.  Nothing deep here.

(cherry picked from commit e24b3b1eeba91bd5b127261652b48eae2d4751b1)

3 years agoBump bytestring submodule
Ben Gamari [Thu, 21 Apr 2016 21:17:18 +0000 (23:17 +0200)] 
Bump bytestring submodule

3 years agoRevert "rts/timer: use timerfd_* on Linux instead of alarm signals"
Ben Gamari [Thu, 21 Apr 2016 11:30:45 +0000 (13:30 +0200)] 
Revert "rts/timer: use timerfd_* on Linux instead of alarm signals"

This reverts commit bbdc52f3a6e6a28e209fb8f65699121d4ef3a4e3.

3 years agoRevert "rtx/posix/Itimer.c: Handle return value of `read`"
Ben Gamari [Thu, 21 Apr 2016 11:30:43 +0000 (13:30 +0200)] 
Revert "rtx/posix/Itimer.c: Handle return value of `read`"

This reverts commit fd3e581b7c9142247601774afc98e49f63b8af45.

3 years agoRevert "rts/posix/Itimer.c: Handle EINTR when reading timerfd"
Ben Gamari [Thu, 21 Apr 2016 11:30:41 +0000 (13:30 +0200)] 
Revert "rts/posix/Itimer.c: Handle EINTR when reading timerfd"

This reverts commit 37936e2b23e58b8a855b7ece5a375b930d1a29bc.

3 years agoMove DFunUnfolding generation to TcInstDcls
Simon Peyton Jones [Wed, 23 Mar 2016 15:37:50 +0000 (15:37 +0000)] 
Move DFunUnfolding generation to TcInstDcls

The desugarer had a fragile case to generate the Unfolding for a
DFun. This patch moves the unfolding generation to TcInstDcls, where
all the pieces are to hand.

Fixes Trac #11742

(cherry picked from commit db9e4eb4e3fe916df7a69da1b211083ad6068aff)

3 years agoBump Cabal submodule
Ben Gamari [Wed, 20 Apr 2016 21:06:19 +0000 (23:06 +0200)] 
Bump Cabal submodule

3 years agoEnsure Typeable declarations end up in boot interface files
Ben Gamari [Wed, 20 Apr 2016 10:05:13 +0000 (12:05 +0200)] 
Ensure Typeable declarations end up in boot interface files

Previously we neglected to emit Typeable TyCon and Module declarations
when typechecking boot interface files. This resulted in #11824.

Ultimately we'll likely want to do a bit of cleaning in this area but in
the interest of getting some sort of fix in I'm merging this. Further
clean-ups to come.

Test Plan: Validate

Reviewers: simonpj, austin

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11824

(cherry picked from commit 048d6187b5892502e9bc75abfb21f9bd848a29cb)

3 years agoBump haddock submodule
Ben Gamari [Wed, 20 Apr 2016 09:47:31 +0000 (11:47 +0200)] 
Bump haddock submodule

Install files needed for --hyperlinked-source. Fixes #11949.

3 years agoUpdate unix submodule to v2.7.2.0 release
Herbert Valerio Riedel [Tue, 19 Apr 2016 21:40:52 +0000 (23:40 +0200)] 
Update unix submodule to v2.7.2.0 release

(cherry picked from commit 81b14c141dc385dbb0de00ea72217185cfa22a09)

3 years agoUpdate binary submodule to release
Herbert Valerio Riedel [Tue, 19 Apr 2016 20:33:58 +0000 (22:33 +0200)] 
Update binary submodule to release

(cherry picked from commit ff290b86ad237d1a5517ad9414a22840f6e749da)

3 years agoUpdate deepseq submodule to latest snapshot
Herbert Valerio Riedel [Tue, 19 Apr 2016 17:16:01 +0000 (19:16 +0200)] 
Update deepseq submodule to latest snapshot

NB: this needs 91ee5090f1e3f43e9e803cf7005a7f3357e58377
(cherry picked from commit 96e1bb4536a6f130c9242e3c25566c7d2e71ee97)

3 years agoMark GHC.Stack.Types Trustworthy
Herbert Valerio Riedel [Tue, 19 Apr 2016 16:32:29 +0000 (18:32 +0200)] 
Mark GHC.Stack.Types Trustworthy

GHC can't infer this module safe due to the `GHC.Types (Char, Int)`
and the  (dummy) `GHC.Integer ()` import.

If only `GHC.Types` was marked Trustworthy or Safe...

(cherry picked from commit 91ee5090f1e3f43e9e803cf7005a7f3357e58377)

3 years agoUpdate hsc2hs submodule
Herbert Valerio Riedel [Tue, 19 Apr 2016 11:56:54 +0000 (13:56 +0200)] 
Update hsc2hs submodule

This bumps the hsc2hs version to 0.68

(cherry picked from commit 81e227929c15ad82f6f67a7390ee140da85eefdb)

3 years agoUpdate `directory` submodule to v1.2.6.2 release
Herbert Valerio Riedel [Tue, 19 Apr 2016 07:00:54 +0000 (09:00 +0200)] 
Update `directory` submodule to v1.2.6.2 release

The v1.2.6.1 release uploaded to Hackage is broken, we don't
want to bundle a release that's non-installable from Hackage

(cherry picked from commit 8556f56b71f979f70f503e1d23a822b21947f7ab)

3 years agorts: Don't use strndup
Ben Gamari [Mon, 18 Apr 2016 20:32:59 +0000 (22:32 +0200)] 
rts: Don't use strndup

Reviewers: austin

Subscribers: thomie

Differential Revision:

(cherry picked from commit d1ce35d2271ac8b79cb5e37677b1a989749e611c)

3 years agorts: Limit maximum backtrace depth
Ben Gamari [Sun, 10 Apr 2016 22:49:06 +0000 (00:49 +0200)] 
rts: Limit maximum backtrace depth

This prevents us from entering an infinite loop in the event of a
hitting bad unwinding information.

(cherry picked from commit 350ffc3e4c6b3aefd6ae621991564cc28f585d46)

3 years agoMake it easy to get hyperlinked sources
Bartosz Nitka [Mon, 18 Apr 2016 13:29:37 +0000 (06:29 -0700)] 
Make it easy to get hyperlinked sources

The version of `haddock` that ghc has as a submodule has an option
for generating linkified sources. I don't think it hurts to have this
and they are great for exploring the codebase.

I'd be nice if harbormaster or travis published them somewhere, but
I don't know how to do that yet.

Test Plan:
uncomment, run `make` and look at the
nicely linkified sources in `compiler/stage2/doc/html/ghc/`

Reviewers: hvr, austin, bgamari

Reviewed By: bgamari

Subscribers: thomie, simonmar

Differential Revision:

(cherry picked from commit 3dac53fa3ede70e86ddb6f40e1e96feb61301754)

3 years agorelnotes: Add note about #11744 and workaround
Ben Gamari [Mon, 18 Apr 2016 13:13:41 +0000 (15:13 +0200)] 
relnotes: Add note about #11744 and workaround

Test Plan: Read it

Reviewers: hvr, austin

Subscribers: carter, thomie

Differential Revision:

GHC Trac Issues: #11744

(cherry picked from commit 03d1fd63914bd0c769fa0444d3ef1a5ddfee220d)

3 years agoUpdate haskeline submodule to release
Herbert Valerio Riedel [Sun, 17 Apr 2016 18:42:43 +0000 (20:42 +0200)] 
Update haskeline submodule to release

(cherry picked from commit 8a75bb5874070bc879818bba572a94632cf079d5)

3 years agoSilence unused-import warning introduced by 93d85af9fec968b
Herbert Valerio Riedel [Sun, 17 Apr 2016 16:39:36 +0000 (18:39 +0200)] 
Silence unused-import warning introduced by 93d85af9fec968b

(cherry picked from commit dd920e43b887bf5288ec364fd416f5e593c693e6)

3 years agoUpdate `directory` submodule to v1.2.6.1 release
Herbert Valerio Riedel [Sun, 17 Apr 2016 15:39:13 +0000 (17:39 +0200)] 
Update `directory` submodule to v1.2.6.1 release

This fixes a build-failure on OSX

(cherry picked from commit 93d85af9fec968b43452891ec7b10382a4a99a38)

3 years agoResolve symlinks when attempting to find GHC's lib folder on Windows
Tamar Christina [Sun, 17 Apr 2016 15:11:02 +0000 (17:11 +0200)] 
Resolve symlinks when attempting to find GHC's lib folder on Windows

Systools makes some pretty hard assumptions about where GHC is on Windows.
One of these is that ghc be in a folder named `bin` and that `../lib` exists.

This pattern doesn't hold for symlinks as a link `C:\ghc-bin\`
pointing to `C:\ghc\ghc-7.10.3\bin` will break this assumption.

This patch resolves symlinks by finding where they point to and uses that location
as the base for GHC.

This uses an API that's been introduced in Vista. For older systems it falls back to
the current behavior of not resolving symlinks.

Test Plan:
1) Create symlink to GHC's bin folder.
2) Run GHC from that folder.

Reviewers: austin, bgamari

Reviewed By: austin

Subscribers: #ghc_windows_task_force, thomie

Differential Revision:

GHC Trac Issues: #11759

(cherry picked from commit a3922083e8f41fc236972564dc2978f2a2d4ec13)

3 years agoCheck CCS tree for pointers into shared object during checkUnload
Andrew Farmer [Sun, 17 Apr 2016 12:43:24 +0000 (14:43 +0200)] 
Check CCS tree for pointers into shared object during checkUnload

Prevent shared objects from being unloaded if cost centre stacks point
at the object. This will prevent segfault in #11776, but also prevents
objects from ever being unloaded when profiling. Pruning CCS tree will
enable that in another diff.

Test Plan: make TEST=linker_profiled, examine

Reviewers: austin, simonmar, bgamari

Reviewed By: simonmar, bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11776

(cherry picked from commit 36a0b6dc27ae0ee2022afbef5d3cd49dfde9e82b)

3 years agovalidate: Note existence of config_args variable
Ben Gamari [Sun, 17 Apr 2016 11:25:05 +0000 (13:25 +0200)] 
validate: Note existence of config_args variable

(cherry picked from commit 07dc330736103eee4b94607ef488b3578155f82b)

3 years agousers-guide: Fix typo
Ben Gamari [Sun, 17 Apr 2016 11:21:07 +0000 (13:21 +0200)] 
users-guide: Fix typo

(cherry picked from commit 7a1c07314c0955db822b84108aba0670adb0f9a5)

3 years agoTH: Tweak Haddock language
Ben Gamari [Sun, 17 Apr 2016 10:58:24 +0000 (12:58 +0200)] 
TH: Tweak Haddock language

(cherry picked from commit 89b66742b770311255a441f7fe641b9e212d87aa)

3 years agoAdd TemplateHaskell support for Overlapping pragmas
Iavor S. Diatchki [Sun, 17 Apr 2016 10:56:31 +0000 (12:56 +0200)] 
Add TemplateHaskell support for Overlapping pragmas

Reviewers: hvr, goldfire, austin, RyanGlScott, bgamari

Reviewed By: RyanGlScott, bgamari

Subscribers: RyanGlScott, thomie

Differential Revision:

(cherry picked from commit 04b70cda4ed006c7e3df40e169550a00aba79524)

3 years agoderiveConstants: Verify sanity of nm
Herbert Valerio Riedel [Sat, 16 Apr 2016 13:25:07 +0000 (15:25 +0200)] 
deriveConstants: Verify sanity of nm

Add a sanity check ensuring that nm emits valid hexadecimal output, as
required by POSIX. See #11744 for motivation.

Reviewers: austin, bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11744

(cherry picked from commit bf17fd0e5b5442a87f507b26e64a30c79732838a)

3 years agoUpdate array submodule to v0.5.1.1 release tag
Herbert Valerio Riedel [Sun, 17 Apr 2016 09:10:24 +0000 (11:10 +0200)] 
Update array submodule to v0.5.1.1 release tag

(cherry picked from commit 4cbae1bd70097a2d365ce0644145a8203956d59a)

3 years agoUpdate `directory` submodule to v1.2.6.0 release
Herbert Valerio Riedel [Sat, 16 Apr 2016 19:17:03 +0000 (21:17 +0200)] 
Update `directory` submodule to v1.2.6.0 release

(cherry picked from commit 3f3ad75e7b9127dac72cca56623879fbec0b88c8)

3 years agolibdw: More precise version check
Ben Gamari [Fri, 15 Apr 2016 09:43:41 +0000 (11:43 +0200)] 
libdw: More precise version check

Test Plan: Try configure in an environment with older `libdw`

Reviewers: hvr, austin

Subscribers: thomie, erikd

Differential Revision:

GHC Trac Issues: #11820

(cherry picked from commit e9ad48935fa48aa32dc39a55512168ba5f5bdbd2)

3 years agoIncrease an InScopeSet for a substitution
Richard Eisenberg [Tue, 12 Apr 2016 16:00:55 +0000 (12:00 -0400)] 
Increase an InScopeSet for a substitution

This is a further fix for #11814

(cherry picked from commit 8d66765c4de22c01b8ae97570ed6c5f5c1a16a35)

3 years agoTeach lookupLocalRdrEnv about Exacts. (#11813)
Richard Eisenberg [Fri, 8 Apr 2016 06:01:34 +0000 (08:01 +0200)] 
Teach lookupLocalRdrEnv about Exacts. (#11813)

(cherry picked from commit d81cdc227cd487659995ddea577214314c9b4b97)

3 years agoBump haddock submodule
Ben Gamari [Sat, 16 Apr 2016 15:59:15 +0000 (17:59 +0200)] 
Bump haddock submodule

3 years agotestsuite: Add test for #11827
Ben Gamari [Fri, 15 Apr 2016 09:41:24 +0000 (11:41 +0200)] 
testsuite: Add test for #11827

Test Plan: Validate

Reviewers: austin

Reviewed By: austin

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11827

(cherry picked from commit cb0d29b21ccadde681f80f9e414f78ab42a203c7)

3 years agotestsuite: Add T11824
Ben Gamari [Fri, 15 Apr 2016 09:41:12 +0000 (11:41 +0200)] 
testsuite: Add T11824

Test Plan: Validate

Reviewers: goldfire, austin

Reviewed By: austin

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11824

(cherry picked from commit 116088de1dc3188e82f3f79b39f8e92f30ab88d7)

3 years agoLinker: Fix signedness mismatch
Ben Gamari [Fri, 15 Apr 2016 09:41:34 +0000 (11:41 +0200)] 
Linker: Fix signedness mismatch

Test Plan: Validate on OS X

Reviewers: erikd, austin, Phyx

Reviewed By: austin, Phyx

Subscribers: Phyx, thomie

Differential Revision:

GHC Trac Issues: #11828

(cherry picked from commit 9d063b690766af7d805ff015c0a0f69326ea3db7)

3 years agorel-notes: Add note about UndecidableSuperClasses and #11762
Ben Gamari [Fri, 15 Apr 2016 09:41:45 +0000 (11:41 +0200)] 
rel-notes: Add note about UndecidableSuperClasses and #11762

Test Plan: Read it

Reviewers: austin, kosmikus

Reviewed By: kosmikus

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11318, #11762

(cherry picked from commit 933abfa7ec88bd91e60a62e51bb2f9a068d379f1)

3 years agousers-guide: Note change in LLVM support policy
Ben Gamari [Wed, 13 Apr 2016 11:41:09 +0000 (13:41 +0200)] 
users-guide: Note change in LLVM support policy

(cherry picked from commit aaaa61c8b712cc313c140ec15f6044e13a036d1f)

3 years agoFix #11814 by throwing more stuff into InScopeSets
Richard Eisenberg [Wed, 6 Apr 2016 13:24:34 +0000 (15:24 +0200)] 
Fix #11814 by throwing more stuff into InScopeSets

(cherry picked from commit 0b6dcf6d2ccac3b43037650279256022a352de53)

3 years agoFix #11797.
Richard Eisenberg [Wed, 6 Apr 2016 14:37:22 +0000 (16:37 +0200)] 
Fix #11797.

DsMeta curiously omitted quantified tyvars in certain circumstances.
This patch means it doesn't.

Test case: th/T11797

(cherry picked from commit dd99f2ece1bd139be02beddc6dc672862ee5ae34)

3 years agoFix #11811.
Richard Eisenberg [Thu, 7 Apr 2016 14:44:06 +0000 (16:44 +0200)] 
Fix #11811.

Previously, I had forgotten to omit variables already in scope
from the TypeInType CUSK check. Simple enough to fix.

Test case: typecheck/should_compile/T11811

(cherry picked from commit b1084fd700e6bbe9d0d787046a6aabdb193982c4)

3 years agoAdd linker notes
Tamar Christina [Mon, 11 Apr 2016 04:51:44 +0000 (06:51 +0200)] 
Add linker notes

Summary: Add linker notes following #11223 and D1805

Reviewers: austin, bgamari, erikd

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11223

(cherry picked from commit c6e579bc3820afe71e51b711ee579a4d658ffbf9)

3 years agoUse `@since` annotation in GHC.ExecutionStack
Herbert Valerio Riedel [Mon, 11 Apr 2016 05:28:15 +0000 (07:28 +0200)] 
Use `@since` annotation in GHC.ExecutionStack

While ad532ded871a9a5180388a2b7cdbdc26e053284c fixed the version
number, this fixes the markup...

(cherry picked from commit 2ef35d8fed58cb9f33190c6d9908262535b26f90)

3 years agoDeriving Functor-like classes should unify kind variables ghc-8.0.1-rc3
RyanGlScott [Mon, 11 Apr 2016 00:53:23 +0000 (02:53 +0200)] 
Deriving Functor-like classes should unify kind variables

While the deriving machinery always unifies the kind of the typeclass
argument with the kind of the datatype, this proves not to be sufficient
to produce well kinded instances for some poly-kinded datatypes. For

newtype Compose (f :: k2 -> *) (g :: k1 -> k2) (a :: k1)
  = Compose (f (g a)) deriving Functor

would fail because only `k1` would get unified with `*`, causing the
ill kinded instance to be generated:

instance (Functor (f :: k2 -> *), Functor (g :: * -> k2)) =>
  Functor (Compose f g) where ...

To prevent this, we need to take the subtypes and unify their kinds with
`* -> *`.

Fixes #10524 for good.

Test Plan: ./validate

Reviewers: simonpj, hvr, austin, bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #10524, #10561

(cherry picked from commit aadde2b90817c577336da0d4a10ea47551d60c7e)

3 years agoAdded (more) missing instances for Identity and Const
Shane O'Brien [Mon, 11 Apr 2016 00:53:00 +0000 (02:53 +0200)] 
Added (more) missing instances for Identity and Const

  * `Identity` and `Const` now have `Num`, `Real`, `Integral`,
    `Fractional`, `Floating`, `RealFrac` and `RealFloat` instances

  * `Identity` and `Const` now have `Bits` and `FiniteBits` instances

  * `Identity` and `Const` now have `IsString` instances

Reviewers: RyanGlScott, austin, hvr, bgamari, ekmett

Reviewed By: ekmett

Subscribers: nomeata, ekmett, RyanGlScott, thomie

Differential Revision:

GHC Trac Issues: #11790

(cherry picked from commit 8b57cac5974c9fffccbcae3104b5b5d18760749e)

3 years agoFilter out invisible kind arguments during TH reification
RyanGlScott [Mon, 11 Apr 2016 00:34:55 +0000 (02:34 +0200)] 
Filter out invisible kind arguments during TH reification

Previously, all kind arguments were being reified, which would cause
something like this:

type Id a = a
data Proxy (a :: Id k) = Proxy

to output

data Proxy (a :: Id * k) = Proxy

when `Proxy`'s `Info` is reified. The fix is simple: simply call
`filterOutInvisibleTypes` on the kind arguments of a kind synonym

Fixes #11463.

Test Plan: ./validate

Reviewers: austin, bgamari, goldfire

Reviewed By: goldfire

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11463

(cherry picked from commit 02a5c580b6078630842f4c3db5d92631fada21e9)

3 years agoFix a closed type family error message
Rik Steenkamp [Mon, 11 Apr 2016 00:26:06 +0000 (02:26 +0200)] 
Fix a closed type family error message

Now we check whether a closed type family's equation is headed with
the correct type before we kind-check the equation.

Also, instead of "expected only no parameters" we now generate the
message "expected no parameters".

Fixes #11623.

Reviewers: simonpj, austin, bgamari

Reviewed By: simonpj, bgamari

Subscribers: simonpj, goldfire, thomie

Differential Revision:

GHC Trac Issues: #11623

(cherry picked from commit 46e8f199e4d3baffa306a40082fbc2fce67f779f)

3 years agoOmit TEST=T10697_decided_3 WAY=ghci
Thomas Miedema [Fri, 1 Jan 2016 11:46:37 +0000 (12:46 +0100)] 
Omit TEST=T10697_decided_3 WAY=ghci

(cherry picked from commit d935d20988af7f3109b73d7c51a0e4a6b12b926c)

3 years agoChange runtime linker to perform lazy loading of symbols/sections
Tamar Christina [Sun, 10 Apr 2016 22:38:42 +0000 (00:38 +0200)] 
Change runtime linker to perform lazy loading of symbols/sections

The Runtime Linker is currently eagerly loading all object files on all
platforms which do not use the system linker for `GHCi`.

The problem with this approach is that it requires all symbols to be
found.  Even those of functions never used/called. This makes the number
of libraries required to link things like `mingwex` quite high.

To work around this the `rts` was relying on a trick. It itself was
compiled with `MingW64-w`'s `GCC`. So it was already linked against
`mingwex`.  As such, it re-exported the symbols from itself.

While this worked it made it impossible to link against `mingwex` in
user libraries. And with this means no `C99` code could ever run in
`GHCi` on Windows without having the required symbols re-exported from
the rts.

Consequently this rules out a large number of packages on Windows.
SDL2, HMatrix etc.

After talking with @rwbarton I have taken the approach of loading entire
object files when a symbol is needed instead of doing the dependency
tracking on a per symbol basis. This is a lot less fragile and a lot
less complicated to implement.

The changes come down to the following steps:

1) modify the linker to and introduce a new state for ObjectCode:
   `Needed`.  A Needed object is one that is required for the linking to
   succeed.  The initial set consists of all Object files passed as
   arguments to the link.

2) Change `ObjectCode`'s to be indexed but not initialized or resolved.
   This means we know where we would load the symbols,
   but haven't actually done so.

3) Mark any `ObjectCode` belonging to `.o` passed as argument
   as required: ObjectState `NEEDED`.

4) During `Resolve` object calls, mark all `ObjectCode`
   containing the required symbols as `NEEDED`

5) During `lookupSymbol` lookups, (which is called from `linkExpr`
   and `linkDecl` in `GHCI.hs`) is the symbol is in a not-yet-loaded
   `ObjectCode` then load the `ObjectCode` on demand and return the
   address of the symbol. Otherwise produce an unresolved symbols error
   as expected.

6) On `unloadObj` we then change the state of the object and remove
   it's symbols from the `reqSymHash` table so it can be reloaded.

This change affects all platforms and OSes which use the runtime linker.
It seems there are no real perf tests for `GHCi`, but performance
shouldn't be impacted much. We gain a lot of time not loading all `obj`
files, and we lose some time in `lookupSymbol` when we're finding
sections that have to be loaded. The actual finding itself is O(1)
(Assuming the hashtnl is perfect)

It also consumes slighly more memory as instead of storing just the
address of a symbol I also store some other information, like if the
symbol is weak or not.

This change will break any packages relying on renamed POSIX functions
that were re-named and re-exported by the rts. Any packages following
the proper naming for functions as found on MSDN will work fine.

Test Plan: ./validate on all platforms which use the Runtime linker.

Reviewers: thomie, rwbarton, simonmar, erikd, bgamari, austin, hvr

Reviewed By: erikd

Subscribers: kgardas, gridaphobe, RyanGlScott, simonmar,
             rwbarton, #ghc_windows_task_force

Differential Revision:

GHC Trac Issues: #11223

(cherry picked from commit 90538d86af579595987826cd893828d6f379f35a)

3 years agoReduce fragmentation from m32_allocator
Bartosz Nitka [Sun, 6 Mar 2016 21:18:12 +0000 (13:18 -0800)] 
Reduce fragmentation from m32_allocator

This patch brings in two improvements:
a) m32_allocator will now reuse the pages that are no longer
used by anyone else.
b) m32_allocator will preallocate the "filling" area,
so that the pages it allocates end up as a big chunk
instead of being allocated on demand in random places,
fragmenting the precious lower 2G address space.

Test Plan: testsuite - 3 tests failing with substTy asserts

Reviewers: ezyang, austin, bgamari, erikd, hsyl20, simonmar

Reviewed By: hsyl20, simonmar

Subscribers: hvr, thomie

Differential Revision:

(cherry picked from commit 82e36edcbd831e9b7c05e1c2cb918ad5de56cd3a)

3 years agoFix Windows build after D1874
Tamar Christina [Tue, 2 Feb 2016 11:36:52 +0000 (12:36 +0100)] 
Fix Windows build after D1874

Windows uses wchar_t* for paths. The code committed won't compile for
Windows as the types are incorrect and the types in the branches of the
ternary operator aren't consistent.

Test Plan: ./validate --fast

Reviewers: austin, rwbarton, erikd, bgamari

Subscribers: thomie

Differential Revision:

(cherry picked from commit 01c587c03764de52cd01a3464c1a4a5c5bce7c00)

3 years agoFix runtime linker error message when old symbol had no owner
Reid Barton [Mon, 1 Feb 2016 14:43:48 +0000 (09:43 -0500)] 
Fix runtime linker error message when old symbol had no owner

Test Plan: Actually run validate. This fixes test linker_error3.

Reviewers: austin, erikd, bgamari

Reviewed By: erikd, bgamari

Subscribers: thomie

Differential Revision:

(cherry picked from commit 73293109645efe42bf3fdf3335f4ab7cef39001b)

3 years agoWhen encountering a duplicate symbol, show source of the first symbol
Reid Barton [Mon, 1 Feb 2016 00:10:29 +0000 (19:10 -0500)] 
When encountering a duplicate symbol, show source of the first symbol

Test Plan: Used this to track down an issue I was having.

Reviewers: simonmar, austin, erikd, bgamari

Reviewed By: erikd, bgamari

Subscribers: thomie

Differential Revision:

(cherry picked from commit 34519f0811c58cb1fd073fae3f83b6543c69a634)

3 years agoBump haddock submodule
Ben Gamari [Sun, 10 Apr 2016 21:47:42 +0000 (23:47 +0200)] 
Bump haddock submodule

Fixes #11818, where haddock's documentation broke `make install` when
Sphinx is not available.

3 years agoRtsFlags: Un-constify temporary buffer
Ben Gamari [Sun, 10 Apr 2016 21:28:46 +0000 (23:28 +0200)] 
RtsFlags: Un-constify temporary buffer

Otherwise we get a const-ness mismatch when we free the buffer, which
for some reason gcc 5.3 didn't notice.

(cherry picked from commit 378091c9ef6d25a076125f0b82dce1a155c0e8f0)

3 years agoRemove the instantiation check when deriving Generic(1)
RyanGlScott [Sun, 10 Apr 2016 20:59:37 +0000 (22:59 +0200)] 
Remove the instantiation check when deriving Generic(1)

Previously, deriving `Generic(1)` bailed out when attempting to
instantiate visible type parameters (#5939), but this instantiation
check was quite fragile and doesn't interact well with `-XTypeInType`.
It has been decided that `Generic(1)` shouldn't be subjected to this
check anyway, so it has been removed, and `gen_Generic_binds`'s
machinery has been updated to substitute the type variables in a
generated `Rep`/`Rep1` instance with the user-supplied type arguments.

In addition, this also refactors `Condition` in `TcDeriv` a bit. Namely,
since we no longer need `tc_args` to check any conditions, the `[Type]`
component of `Condition` has been removed.

Fixes #11732.

Test Plan: ./validate

Reviewers: goldfire, kosmikus, simonpj, bgamari, austin

Reviewed By: simonpj, bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #5939, #11732

(cherry picked from commit 7443e5c8dae24b83f5f4975c7accce02b819029c)

3 years agobase: Fix "since" annotation on GHC.ExecutionStack
Ben Gamari [Sun, 10 Apr 2016 18:00:48 +0000 (20:00 +0200)] 
base: Fix "since" annotation on GHC.ExecutionStack

I have no idea where "4.11" came from.

(cherry picked from commit ad532ded871a9a5180388a2b7cdbdc26e053284c)

3 years agoFix suggestions for unbound variables (#11680)
Jason Eisenberg [Sun, 10 Apr 2016 17:17:46 +0000 (19:17 +0200)] 
Fix suggestions for unbound variables (#11680)

When the typechecker generates the error message for an out-of-scope
variable, it now uses the GlobalRdrEnv with respect to which the
variable is unbound, not the GlobalRdrEnv which is available at the time
the error is reported.  Doing so ensures we do not provide suggestions
which themselves are out-of-scope (because they are bound in a later
inter-splice group).

Nonetheless, we do note in the error message if an unambiguous, exact
match to the out-of-scope variable is found in a later inter-splice
group, and we specify where that match is not in scope.

Test Plan: ./validate

Reviewers: goldfire, austin, bgamari

Reviewed By: goldfire

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11680

(cherry picked from commit 470d4d5b8e7cbcc176b1f3ac26ce0d95acd35a78)

3 years agoExport zonkEvBinds from TcHsSyn.
Conal Elliott [Sun, 10 Apr 2016 17:13:44 +0000 (19:13 +0200)] 
Export zonkEvBinds from TcHsSyn.

Needed for constructing correct constraint-satisfying code
(particularly type class instances) in a Core-to-Core transformation.

Reviewers: simonpj, austin, bgamari

Reviewed By: austin, bgamari

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11804

(cherry picked from commit 5a1add134fdb2ab4d91b0f66de1dc89f0cd69354)

3 years agoReduce default for -fmax-pmcheck-iterations from 1e7 to 2e6
Herbert Valerio Riedel [Sun, 10 Apr 2016 17:13:16 +0000 (19:13 +0200)] 
Reduce default for -fmax-pmcheck-iterations from 1e7 to 2e6

The commit 28f951edfe50ea5182065144340061ec326781f5 introduced the
`-fmax-pmcheck-iterations` flag and set the default limit to 1e7

However, this value is still high enough that it can result GHC to
exhibit memory spikes beyond 1 GiB of RAM usage (heap profile showed
several `(:)`s, as well as `THUNK_2_0`, and `PmCon` during the memory

A value of 2e6 seems to be a safer upper bound which still manages to
let the checker not run into the limit in most cases.

Test Plan: Validate, try building a few Hackage packages

Reviewers: austin, gkaracha, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision:

(cherry picked from commit d2e05c6bd0834421b0c48b3c4287fbe6ee889966)

3 years agoFix Template Haskell bug reported in #11809.
Dominik Bollmann [Sun, 10 Apr 2016 16:57:38 +0000 (18:57 +0200)] 
Fix Template Haskell bug reported in #11809.

Record selectors of data types spliced in with Template Haskell are not
renamer-resolved correctly in GHC HEAD. The culprit is
`newRecordSelector` which violates notes `Note [Binders in Template
Haskell] in Convert.hs` and `Note [Looking up Exact RdrNames] in
RnEnv.hs`. This commit fixes `newRecordSelector` accordingly.

Test Plan: ./validate

Reviewers: thomie, mpickering, bgamari, austin, simonpj, goldfire

Reviewed By: goldfire

Differential Revision:

GHC Trac Issues: #11809

(cherry picked from commit 2f82da761defba2cfdc55ca08d774ca7e1240463)

3 years agoAdd doc to (<=<) comparing its type to (.)
Chris Martin [Sun, 10 Apr 2016 16:55:45 +0000 (18:55 +0200)] 
Add doc to (<=<) comparing its type to (.)

This is another documentation addition similar to D1989, this time
comparing the type of the Kleisli composition operator (<=<) to that
of plain function composition (.).

Reviewers: hvr, austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision:

(cherry picked from commit 90d66dedc3a2d9b03dfd3dc3314d380e2adcf2ea)

3 years agoProvide an optimized replicateM_ implementation #11795
Michael Snoyman [Sun, 10 Apr 2016 16:52:47 +0000 (18:52 +0200)] 
Provide an optimized replicateM_ implementation #11795

In my testing, the worker/wrapper transformation applied here
significantly decreases the number of allocations performed when using
replicateM_. Additionally, this version of the function behaves
correctly for negative numbers (namely, it will behave the same as
replicateM_ 0, which is what previous versions of base have done).

Reviewers: bgamari, simonpj, hvr, austin

Reviewed By: bgamari, simonpj, austin

Subscribers: nomeata, simonpj, mpickering, thomie

Differential Revision:

GHC Trac Issues: #11795

(cherry picked from commit c4a7520ef3a0b5e0e33d66ae1d628af93e0d7590)

3 years agorts: Fix parsing of profiler selectors
Ben Gamari [Thu, 7 Apr 2016 13:26:11 +0000 (15:26 +0200)] 
rts: Fix parsing of profiler selectors

69822f0c5b67161b4d7558081bc94f6f3a7c5dbb broke this as it held on to a
reference into the `arg` string, which is later freed. Humbug.

Test Plan: Try using filtering

Reviewers: austin

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11810

(cherry picked from commit 535896e58f7fc8d89a5ff34629a3471eac529d93)

3 years agoFix installation of static sphinx assets
Ben Gamari [Wed, 6 Apr 2016 21:40:44 +0000 (23:40 +0200)] 
Fix installation of static sphinx assets

Previously the `_static` and `_sources` directories were installed in
the wrong parents. See #11803

(cherry picked from commit 6b6bebaf2349c51343bec2b8fa0e80b7e42593a6)

3 years agoElaborate test for #11376
Simon Peyton Jones [Mon, 4 Apr 2016 09:34:35 +0000 (10:34 +0100)] 
Elaborate test for #11376

This just adds the Prox stuff from the Description in Trac #11376
to the test case,

The class stuff seems weird becuase the type is ambiguous

(cherry picked from commit b3ecd047c432405b57b429fdeaad43f5dcd1ee24)

3 years agoUpdate pretty submodule
Ben Gamari [Wed, 6 Apr 2016 19:57:23 +0000 (21:57 +0200)] 
Update pretty submodule

3 years agoBump Cabal submodule
Ben Gamari [Wed, 6 Apr 2016 19:49:47 +0000 (21:49 +0200)] 
Bump Cabal submodule

3 years agoBump parallel submodule
Ben Gamari [Wed, 6 Apr 2016 19:40:57 +0000 (21:40 +0200)] 
Bump parallel submodule

3 years agotestsuite: One more 32-bit performance slip
Ben Gamari [Wed, 6 Apr 2016 19:36:52 +0000 (21:36 +0200)] 
testsuite: One more 32-bit performance slip

3 years agotestsuite: Update 32-bit performance numbers
Ben Gamari [Wed, 6 Apr 2016 16:27:52 +0000 (18:27 +0200)] 
testsuite: Update 32-bit performance numbers

It's been quite a while since this has happened for some of our tests.

3 years agoT10870: Skip on 32-bit architectures
Ben Gamari [Wed, 6 Apr 2016 15:12:45 +0000 (17:12 +0200)] 
T10870: Skip on 32-bit architectures

Shifts by amounts greater-than-or-equal-to the word size are undefined.

3 years agoT10272, T4340: Add 32-bit output
Ben Gamari [Wed, 6 Apr 2016 14:51:56 +0000 (16:51 +0200)] 
T10272, T4340: Add 32-bit output

3 years agoSkip TEST=TcCoercibleFail when compiler_debugged
Thomas Miedema [Mon, 29 Feb 2016 12:59:48 +0000 (13:59 +0100)] 
Skip TEST=TcCoercibleFail when compiler_debugged

(cherry picked from commit 49c55e68aae9841c166430ae566b0d9bdc03c99d)

3 years agoDeeply instantiate in :type
Simon Peyton Jones [Mon, 4 Apr 2016 09:18:43 +0000 (10:18 +0100)] 
Deeply instantiate in :type

See Trac #11376 and
 Note [Deeply instantiate in :type] in TcRnDriver

Sadly this showed up one new problem (Trac #11786) and one opportunity
(Trac #11787), so test T11549 is now marked expect-broken on these two.

(cherry picked from commit f2a2b79fa8d1c702b17e195a70734b06625e0153)

3 years agoFix misattribution of `-Wunused-local-binds` warnings
Herbert Valerio Riedel [Tue, 5 Apr 2016 13:15:47 +0000 (15:15 +0200)] 
Fix misattribution of `-Wunused-local-binds` warnings

This fixes a bug where warnings actually controlled by

- `Opt_WarnUnusedMatches`
- `Opt_WarnUnusedTypePatterns`
- `Opt_WarnUnusedTopBinds`

were incorrectly reported as being controlled by
`Opt_WarnUnusedLocalBinds` as well

This bug was introduced in bb5afd3c274011c5ea302210b4c290ec1f83209c
while implementing #10752

Test Plan: ./validate still running -- testsuite output wiggles expected

Reviewers: barrucadu, quchen, austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision:

(cherry picked from commit 003e0802fdc2b38b2c3e96cdd387619d33c44967)

3 years agorts: Make StablePtr derefs thread-safe (#10296)
Jason Eisenberg [Mon, 4 Apr 2016 08:57:39 +0000 (10:57 +0200)] 
rts: Make StablePtr derefs thread-safe (#10296)

Stable pointers can now be safely dereferenced while the stable pointer
table is simultaneously being enlarged.

Test Plan: ./validate

Reviewers: ezyang, austin, bgamari, simonmar

Subscribers: carter, thomie

Differential Revision:

GHC Trac Issues: #10296

(cherry picked from commit 90d7d6086ed6f271a352e784c3bc1d5ecac6052c)

3 years agoDon't infer CallStacks
Eric Seidel [Mon, 4 Apr 2016 10:05:01 +0000 (12:05 +0200)] 
Don't infer CallStacks

We originally wanted CallStacks to be opt-in, but dealing with let
binders complicated things, forcing us to infer CallStacks. It turns
out that the inference is actually unnecessary though, we can let the
wanted CallStacks bubble up to the outer context by refusing to
quantify over them. Eventually they'll be solved from a given CallStack
or defaulted to the empty CallStack if they reach the top.

So this patch prevents GHC from quantifying over CallStacks, getting us
back to the original plan. There's a small ugliness to do with
PartialTypeSignatures, if the partial theta contains a CallStack
constraint, we *do* want to quantify over the CallStack; the user asked
us to!

Note that this means that

  foo :: _ => CallStack
  foo = getCallStack callStack

will be an *empty* CallStack, since we won't infer a CallStack for the
hole in the theta. I think this is the right move though, since we want
CallStacks to be opt-in. One can always write

  foo :: (HasCallStack, _) => CallStack
  foo = getCallStack callStack

to get the CallStack and still have GHC infer the rest of the theta.

Test Plan: ./validate

Reviewers: goldfire, simonpj, austin, hvr, bgamari

Reviewed By: simonpj, bgamari

Subscribers: bitemyapp, thomie

Projects: #ghc

Differential Revision:

GHC Trac Issues: #11573

(cherry picked from commit 7407a66d5bd29aa011f5a4228c6e2b2f7f8ad3f8)

3 years agoBump binary submodule
Ben Gamari [Mon, 4 Apr 2016 09:52:43 +0000 (11:52 +0200)] 
Bump binary submodule

(cherry picked from commit 9b6820cdd6bac8b8346be48224627e3feefa9036)

3 years agoImprove printing of pattern synonym types
Rik Steenkamp [Sat, 2 Apr 2016 19:39:10 +0000 (20:39 +0100)] 
Improve printing of pattern synonym types

Add the function `pprPatSynType :: PatSyn -> SDoc` for printing pattern
synonym types, and remove the ambiguous `patSynType` function. Also,
the types in a `PatSyn` are now tidy.

Haddock submodule updated to reflect the removal of `patSynType` by

Fixes: #11213.

Reviewers: goldfire, simonpj, austin, mpickering, bgamari

Reviewed By: simonpj, mpickering

Subscribers: bollmann, simonpj, thomie

Differential Revision:

GHC Trac Issues: #11213

(cherry picked from commit 72bd7f7be7809076f321a6fca90024e3e1bde3cc)

3 years agoMake the example for -M work
Bartosz Nitka [Fri, 1 Apr 2016 20:03:17 +0000 (13:03 -0700)] 
Make the example for -M work

`ghc` fails without `-dep-suffix ''`.

Test Plan: visual inspection

Reviewers: austin, bgamari

Reviewed By: bgamari

Subscribers: thomie, simonmar

Differential Revision:

(cherry picked from commit 38068913c13fa64bd776fab6cf0e971c1a18b54d)

3 years agoRevert accidental change to collectTyAndValBinders
Simon Peyton Jones [Thu, 31 Mar 2016 09:47:47 +0000 (10:47 +0100)] 
Revert accidental change to collectTyAndValBinders

Richard accidetally introduced this change in his big kind-equality
patch.  The code is wrong, and potentially could cause binders to
be re-ordered.

Worth merging to 8.0.

(cherry picked from commit da260a5bddf990959f639a3551b335ee26c766f6)

3 years agoAlways do eta-reduction
Simon Peyton Jones [Thu, 11 Feb 2016 10:38:33 +0000 (10:38 +0000)] 
Always do eta-reduction

See Note [Eta-reduction in -O0] in DynFlags.

Bottom line: doing eta reduction unconditionally is benign, and
removes an ASSERT failure (Trac #11562).

(cherry picked from commit 850085555a1103810d57f0d9835f4d525fd8ec00)

3 years agoAdd -f(no-)version-macro to explicitly control macros.
Edward Z. Yang [Wed, 30 Mar 2016 19:44:09 +0000 (21:44 +0200)] 
Add -f(no-)version-macro to explicitly control macros.

Test Plan: validate

Reviewers: thomie, austin, bgamari

Reviewed By: bgamari

Subscribers: hvr

Differential Revision:

GHC Trac Issues: #11763

(cherry picked from commit bc953fcdbc76ffbb4f06a2b74be271268f73328f)

3 years agoDon't require -hide-all-packages for MIN_VERSION_* macros
Thomas Miedema [Wed, 30 Mar 2016 19:43:51 +0000 (21:43 +0200)] 
Don't require -hide-all-packages for MIN_VERSION_* macros

Define MIN_VERSION_pkgname and VERSION_pkgname macros for all exposed
packages, without requiring -hide-all-packages.

See #10970 comment 7-10 for discussion.

Reviewers: duncan, ezyang, bgamari, austin

Reviewed By: ezyang

Subscribers: hvr, rwbarton

Differential Revision:

GHC Trac Issues: #10970

(cherry picked from commit e9c2555ac666912f7dff56448ced4bfa06d14e76)

3 years agorts/posix/Itimer.c: Handle EINTR when reading timerfd
Erik de Castro Lopo [Mon, 28 Mar 2016 03:29:37 +0000 (14:29 +1100)] 
rts/posix/Itimer.c: Handle EINTR when reading timerfd

Commit 8626d76a72 added checking of the return value when reading from
the `timer_fd` and calling `sysErrorBelch` to print a warning message.
However some error causes (like EINTR) are benign and should just be

Test Plan: validate

Reviewers: hvr, austin, bgamari

Subscribers: thomie

Differential Revision:

(cherry picked from commit 7aa4c52f9df1705258f43f9c003c17af97401693)

3 years agoDon't recompute some free vars in lintCoercion
Bartosz Nitka [Wed, 30 Mar 2016 02:37:54 +0000 (19:37 -0700)] 
Don't recompute some free vars in lintCoercion

As pointed out by @simonpj on D2044 we don't need
to compute the free vars of the range of the substitution
as most of them are already carried by the monad.
This should be a tiny performance improvement over the version
from before D2044.

Also removes an extra function that is now unnecessary.

Test Plan: ./validate && ./validate --slow

Reviewers: goldfire, simonpj, austin, bgamari

Reviewed By: simonpj

Subscribers: thomie, simonmar, simonpj

Differential Revision:

GHC Trac Issues: #11371

(cherry picked from commit 1757dd8ebed0732018319e43e6468b868a6aceeb)

3 years agoDo not claim that -O2 does not do better than -O
Joachim Breitner [Wed, 30 Mar 2016 14:09:36 +0000 (16:09 +0200)] 
Do not claim that -O2 does not do better than -O

when in fact it does. This was pointed out by Johannes Bechberger and
supported with seemingly statistically sound evidence in his Bachelor
thesis: Of the benchmark shootout programs, 80% benefit significantly by
switchtng from -O to -O2.

for a few raw numbers.

Differential Revision:

(cherry picked from commit 3d245bf5255ebfb72813596fa93b9051f7518321)

3 years agoDrop Xcode 4.1 hack and fix ignored CC var issue
Herbert Valerio Riedel [Mon, 28 Mar 2016 10:55:21 +0000 (12:55 +0200)] 
Drop Xcode 4.1 hack and fix ignored CC var issue

Xcode 4.1 was released back in 2011 for Mac OSX 10.6/10.7.
However, OSX 10.7 reached EOL sometime around the end of 2014.
So this `--with-gcc-4.2` hack shouldn't be needed anymore.

Moreover, this patch changes ./configure to honor the CC env-var
again (and thus fix #11231) while giving `--with-gcc=...` a higher
priority over `CC=...`.

So the following 3 invocations are equivalent now:

  CC=... ./configure
  ./configure CC=...
  ./configure --with-gcc=...

Since `--with-{gcc,clang}=...` is a misnomer (as is made apparent by
`--with-gcc=clang` or `--with-clang=gcc`), this would give us a neutral
and idiomatic way to tell ./configure which C compiler to use.

Moreover, `./configure --help` says at the end of its output:

  Some influential environment variables:
    CC C compiler command
    CFLAGS C compiler flags
    LDFLAGS linker flags, e.g. -L<lib dir> if you have libraries in a
nonstandard directory <lib dir>
    LIBS libraries to pass to the linker, e.g. -l<library>
    CPPFLAGS (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
you have headers in a nonstandard directory <include dir>
    CPP C preprocessor

  Use these variables to override the choices made by `configure' or to help
  it to find libraries and programs with nonstandard names/locations.

Consequently, by honoring CC=... (rather than ignoring it) we increase
consistency and reduce user confusion. Ideally, CC=... would become the
recommended way to set the C compiler, and `--with-{clang,gcc}=...`
would be demoted to legacy aliases.

Reviewed By: erikd, bgamari

Differential Revision:

(cherry picked from commit ffc802e8f617d11de9ece7bed438725bde0300b8)

3 years agoghc-prim: Mark unpackCStringUtf8# and unpackNBytes# as NOINLINE
Ben Gamari [Wed, 30 Mar 2016 08:29:02 +0000 (10:29 +0200)] 
ghc-prim: Mark unpackCStringUtf8# and unpackNBytes# as NOINLINE

There is no benefit to be had from inlining this function and it may
defeat rewrite rules if inlined early. See #11772..

Test Plan: Validate, nofib

Reviewers: simonpj, austin

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11772

(cherry picked from commit 58bbb40ba23860df2ede1275493ef32ba69a2083)

3 years agoDefer inlining of Ord methods
Ben Gamari [Wed, 30 Mar 2016 08:46:39 +0000 (10:46 +0200)] 
Defer inlining of Ord methods

This performs the same refactoring performed in D1980 for Eq on Ord,
rewriting the class operations in terms of monomorphic helpers than can
be reliably matched in rewrite rules.

(cherry picked from commit c0e3e63eca6b0f7a21ae51d992c88821195ad94d)

3 years agoghc-prim: Delay inlining of {gt,ge,lt,le}Int to phase 1
Ben Gamari [Wed, 30 Mar 2016 08:09:36 +0000 (10:09 +0200)] 
ghc-prim: Delay inlining of {gt,ge,lt,le}Int to phase 1

Otherwise rewrite rules may not get an opporunity to fire.

(cherry picked from commit d1179c4bff6d05cc9e86eee3e2d2cee707983c90)

3 years agoRTS: Fix & refactor "portable inline" macros
Herbert Valerio Riedel [Fri, 25 Mar 2016 23:59:31 +0000 (00:59 +0100)] 
RTS: Fix & refactor "portable inline" macros

Turns out the current macros for gnu90-style inline
semantics stopped working with GCC 5
(and possibly also with Apple's GCC) which switched on
`__GNUC_STDC_INLINE__` by default falling back to using the
suboptimal `static inline` mode.

However, C99 supports an equivalent (as far as our
use-case is concerned) `extern inline` mode.

See also
for a write-up of gnu90 vs C99 semantics.

This patch also removes the MSVC case as VS2015 is supposed
to finally catch up to C99 (and C11), so we don't need any
special care for MSVC anymore.

Reviewed By: erikd, austin

Differential Revision:

(cherry picked from commit 882179de09f9bd466b0e7ca83522aee0d3d7144a)

3 years agobase: Fix haddock typo
Ben Gamari [Tue, 29 Mar 2016 16:59:57 +0000 (18:59 +0200)] 
base: Fix haddock typo

(cherry picked from commit eb6b7094c80fda5cc7c1d1ed3386486996f24bff)

3 years agousers-guide/rel-notes: Note broken-ness of ImpredicativeTypes
Ben Gamari [Tue, 29 Mar 2016 14:30:29 +0000 (16:30 +0200)] 
users-guide/rel-notes: Note broken-ness of ImpredicativeTypes

(cherry picked from commit ae6a56ee467d675776be75dc982f5efb2135d3d4)

3 years agorename: Disallow type signatures in patterns in plain Haskell
Ben Gamari [Tue, 29 Mar 2016 12:11:57 +0000 (14:11 +0200)] 
rename: Disallow type signatures in patterns in plain Haskell

This should require -XScopedTypeVariables. It seems this was previously
handled by RnTypes.rnHsBndrSig which called RnTypes.badKindSigErr but
this was broken in Simon's refactor of wildcards,
1e041b7382b6aa329e4ad9625439f811e0f27232. Here we re-introduce a check
in RnPat. See #11663.

Test Plan: Validate with `T11663`

Reviewers: austin, simonpj

Reviewed By: austin

Subscribers: thomie

Differential Revision:

GHC Trac Issues: #11663

(cherry picked from commit d5d6804d37960ece2652196f3661604a70c12ffc)

3 years agobase: Add comment noting import loop
Ben Gamari [Tue, 29 Mar 2016 11:34:45 +0000 (13:34 +0200)] 
base: Add comment noting import loop

(cherry picked from commit b0ab8db61568305f50947058fc5573e2382c84eb)

3 years agoAdd Data.Functor.Classes instances for Proxy (trac issue #11756)
Andrew Martin [Tue, 29 Mar 2016 08:57:47 +0000 (10:57 +0200)] 
Add Data.Functor.Classes instances for Proxy (trac issue #11756)

Test Plan: currently no test plan

Reviewers: hvr, RyanGlScott, bgamari, austin

Reviewed By: RyanGlScott, bgamari, austin

Subscribers: thomie, RyanGlScott, andrewthad

Differential Revision:

GHC Trac Issues: #11756

(cherry picked from commit 5097f3802124cfbe6810bff8110df91d4c52096b)