1. 20 Jul, 2016 12 commits
    • gcampax's avatar
      Compact Regions · cf989ffe
      gcampax authored
      This brings in initial support for compact regions, as described in the
      ICFP 2015 paper "Efficient Communication and Collection with Compact
      Normal Forms" (Edward Z. Yang et.al.) and implemented by Giovanni
      Campagna.
      
      Some things may change before the 8.2 release, but I (Simon M.) wanted
      to get the main patch committed so that we can iterate.
      
      What documentation there is is in the Data.Compact module in the new
      compact package.  We'll need to extend and polish the documentation
      before the release.
      
      Test Plan:
      validate
      (new test cases included)
      
      Reviewers: ezyang, simonmar, hvr, bgamari, austin
      
      Subscribers: vikraman, Yuras, RyanGlScott, qnikst, mboes, facundominguez, rrnewton, thomie, erikd
      
      Differential Revision: https://phabricator.haskell.org/D1264
      
      GHC Trac Issues: #11493
      cf989ffe
    • Ben Gamari's avatar
      Add another testcase for #12082 · 93acc02f
      Ben Gamari authored
      Test Plan: Validate, should pass.
      
      Reviewers: austin
      
      Subscribers: thomie
      
      Differential Revision: https://phabricator.haskell.org/D2399
      
      GHC Trac Issues: #12082
      93acc02f
    • Ben Gamari's avatar
      testsuite: Add regression test for #12381 · a4f2b766
      Ben Gamari authored
      Test Plan: Validate
      
      Reviewers: austin
      
      Subscribers: thomie
      
      Differential Revision: https://phabricator.haskell.org/D2408
      
      GHC Trac Issues: #12381, #11348
      a4f2b766
    • Ben Gamari's avatar
      Clean up interaction between name cache and built-in syntax · 9513fe6b
      Ben Gamari authored
      This cleans up various aspects of the handling of built-in syntax in the
      original name cache (hopefully resulting in a nice reduction in compiler
      allocations),
      
        * Remove tuple types from original name cache: There is really no
          reason for these to be in the name cache since we already handle
          them specially in interface files to ensure that we can resolve them
          directly to Names, avoiding extraneous name cache lookups.
      
        * Sadly it's not possible to remove all traces of tuples from the
          name cache, however. Namely we need to keep the tuple type
          representations in since otherwise they would need to be wired-in
      
        * Remove the special cases for (:), [], and (##) in isBuiltInOcc_maybe
          and rename it to isTupleOcc_maybe
      
        * Split lookupOrigNameCache into two variants,
      
           * lookupOrigNameCache': Merely looks up an OccName in the original
             name cache, making no attempt to resolve tuples
      
           * lookupOrigNameCache: Like the above but handles tuples as well.
             This is given the un-primed name since it does the "obvious"
             thing from the perspective of an API user, who knows nothing of
             our special treatment of tuples.
      
      Arriving at this design took a significant amount of iteration. The
      trail of debris leading here can be found in #11357.
      
      Thanks to ezyang and Simon for all of their help in coming to this
      solution.
      
      Test Plan: Validate
      
      Reviewers: goldfire, simonpj, austin
      
      Reviewed By: simonpj
      
      Subscribers: thomie, ezyang
      
      Differential Revision: https://phabricator.haskell.org/D2414
      
      GHC Trac Issues: #11357
      9513fe6b
    • Ben Gamari's avatar
      InstEnv: Ensure that instance visibility check is lazy · ed480981
      Ben Gamari authored
      Previously instIsVisible had completely broken the laziness of
      lookupInstEnv' since it would examine is_dfun_name to check the name of
      the defining module (to know whether it is an interactive module). This
      resulted in the visibility check drawing in an interface file
      unnecessarily. This contributed to the unnecessary regression in
      compiler allocations reported in #12367.
      
      Test Plan: Validate, check nofib changes
      
      Reviewers: simonpj, ezyang, austin
      
      Reviewed By: ezyang
      
      Subscribers: thomie, ezyang
      
      Differential Revision: https://phabricator.haskell.org/D2411
      
      GHC Trac Issues: #12367
      ed480981
    • thomasw's avatar
      Update docs for partial type signatures (#12365) · 627c767b
      thomasw authored
      * Update the sample error messages. The messages have been reworded and
        reformatted since GHC 7.10.
      
      * Mention `TypeApplications` in "Where can they occur?"
      
      * The name of a named wild card is no longer used in the name of a
        resulting type variable. Before: `_foo` => `w_foo`, now: `_foo` => `t`
        or `a`.
      
      Test Plan: generate the users guide
      
      Reviewers: goldfire, austin, bgamari
      
      Reviewed By: bgamari
      
      Subscribers: thomie
      
      Differential Revision: https://phabricator.haskell.org/D2413
      
      GHC Trac Issues: #12365
      627c767b
    • Dylan Meysmans's avatar
      Data.Either: Add fromLeft and fromRight (#12402) · a0f83a62
      Dylan Meysmans authored
      Reviewers: austin, hvr, RyanGlScott, bgamari
      
      Reviewed By: RyanGlScott, bgamari
      
      Subscribers: RyanGlScott, thomie
      
      Differential Revision: https://phabricator.haskell.org/D2403
      
      GHC Trac Issues: #12402
      a0f83a62
    • Moritz Angermann's avatar
      Cleanup PosixSource.h · cac3fb06
      Moritz Angermann authored
      When trying to build arm64-apple-iso, the build fell over
      `strdup`, as the arm64-apple-ios build did not fall into `darwin_HOST_OS`,
      and would need `ios_HOST_OS`.
      
      This diff tries to clean up PosixSource.h, instead of layering another
      define on top.
      
      As we use `strnlen` in sources that include PosixSource.h, and `strnlen`
      is defined in POSIX.1-2008, the `_POSIX_C_SOURCE` and `_XOPEN_SOURCE`
      are increased accordingly.
      
      Furthermore the `_DARWIN_C_SOURCE` (required for `u_char`, etc. used in
      sysctl.h) define is moved into `OSThreads.h` alongside a similar ifdef
      for freebsd.
      
      Test Plan: Build on all supported platforms.
      
      Reviewers: rwbarton, erikd, austin, hvr, simonmar, bgamari
      
      Reviewed By: simonmar, bgamari
      
      Subscribers: thomie
      
      Differential Revision: https://phabricator.haskell.org/D2375
      cac3fb06
    • seraphime's avatar
      Fix bytecode generator panic · 8de6e13f
      seraphime authored
      This fixes #12128.
      
      The bug was introduced in 1c9fd3f1.
      
      Test Plan: ./validate
      
      Reviewers: simonmar, austin, hvr, simonpj, bgamari
      
      Reviewed By: bgamari
      
      Subscribers: simonpj, thomie
      
      Differential Revision: https://phabricator.haskell.org/D2374
      
      GHC Trac Issues: #12128
      8de6e13f
    • Ben Gamari's avatar
      TcInteract: Add braces to matchClassInst trace output · 908f8e23
      Ben Gamari authored
      This allows you to easily move to the result in a well-equipped editor.
      908f8e23
    • Ryan Scott's avatar
      Make Data.{Bifoldable,Bitraversable} -XSafe · e46b7681
      Ryan Scott authored
      Test Plan:
      Previously, `Data.{Bifoldable,Bitraversable}` were being inferred as
      `Unsafe` due to a transitive `Data.Coerce` import from `Data.Functor.Utils`.
      This rectifies this unfortunate mistake.
      
      Reviewers: austin, hvr, bgamari
      
      Reviewed By: bgamari
      
      Subscribers: thomie, phadej
      
      Differential Revision: https://phabricator.haskell.org/D2412
      e46b7681
    • Ömer Sinan Ağacan's avatar
      Support SCC pragmas in declaration context · 98b2c508
      Ömer Sinan Ağacan authored
      Not having SCCs at the top level is becoming annoying real quick. For
      simplest cases, it's possible to do this transformation:
      
          f x y = ...
          =>
          f = {-# SCC f #-} \x y -> ...
      
      However, it doesn't work when there's a `where` clause:
      
          f x y = <t is in scope>
            where t = ...
          =>
          f = {-# SCC f #-} \x y -> <t is out of scope>
            where t = ...
      
      Or when we have a "equation style" definition:
      
          f (C1 ...) = ...
          f (C2 ...) = ...
          f (C3 ...) = ...
          ...
      
      (usual solution is to rename `f` to `f'` and define a new `f` with a
      `SCC`)
      
      This patch implements support for SCC annotations in declaration
      contexts. This is now a valid program:
      
          f x y = ...
            where
              g z = ...
              {-# SCC g #-}
          {-# SCC f #-}
      
      Test Plan: This passes slow validate (no new failures added).
      
      Reviewers: goldfire, mpickering, austin, bgamari, simonmar
      
      Reviewed By: bgamari, simonmar
      
      Subscribers: simonmar, thomie, mpickering
      
      Differential Revision: https://phabricator.haskell.org/D2407
      98b2c508
  2. 19 Jul, 2016 1 commit
  3. 18 Jul, 2016 4 commits
  4. 16 Jul, 2016 7 commits
  5. 15 Jul, 2016 1 commit
  6. 14 Jul, 2016 2 commits
  7. 13 Jul, 2016 1 commit
  8. 12 Jul, 2016 1 commit
    • Joachim Breitner's avatar
      Demand analyser: Implement LetUp rule (#12370) · 45d8f4eb
      Joachim Breitner authored
      This makes the implementation match the description in the paper more
      closely: There, a let binding that is not a function has first its body
      analised, and then the binding’s RHS. This way, the demand on the bound
      variable by the body can be fed into the RHS, yielding more precise
      results.
      
      Performance measurements do unfortunately not show significant
      improvements or regessions.
      
      Differential Revision: https://phabricator.haskell.org/D2395
      45d8f4eb
  9. 11 Jul, 2016 2 commits
  10. 10 Jul, 2016 2 commits
    • Alan Zimmerman's avatar
      check-api-annotations utility loads by filename · 9a3df1f8
      Alan Zimmerman authored
      Previously it loaded by modulename, which prevented loading files with a
      Main module.
      9a3df1f8
    • Ben Gamari's avatar
      TysWiredIn: Use UniqFM lookup for built-in OccNames · f53d761d
      Ben Gamari authored
      Previously we would unpack the OccName into a String, then pattern match
      against this string. Due to the implementation of `unpackFS`, this
      actually unpacks the entire contents, even though we often only need to
      look at the first few characters.
      
      Here we take another approach: build a UniqFM with the known built-in
      OccNames, allowing us to use `FastString`'s hash-based comparison
      instead.
      
      Reviewers: simonpj, austin, simonmar
      
      Reviewed By: simonmar
      
      Subscribers: thomie
      
      Differential Revision: https://phabricator.haskell.org/D2385
      
      GHC Trac Issues: #12357
      f53d761d
  11. 09 Jul, 2016 1 commit
  12. 08 Jul, 2016 6 commits