[Git][ghc/ghc][wip/negative-literals] 16 commits: winio: restore console cp on exit

Sun Jul 26 11:34:53 UTC 2020

Vladislav Zavialov pushed to branch wip/negative-literals at Glasgow Haskell Compiler / GHC

Commits:
cdd0ff16 by Tamar Christina at 2020-07-24T18:12:23-04:00
winio: restore console cp on exit

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c1f4f81d by Tamar Christina at 2020-07-24T18:13:00-04:00
winio: change memory allocation strategy and fix double free errors.

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ba205046 by Simon Peyton Jones at 2020-07-24T18:13:35-04:00
Care with occCheckExpand in kind of occurrences

Issue #18451 showed that we could get an infinite type, through
over-use of occCheckExpand in the kind of an /occurrence/ of a
type variable.

See Note [Occurrence checking: look inside kinds] in GHC.Core.Type

This patch fixes the problem by making occCheckExpand less eager
to expand synonyms in kinds.

It also improves pretty printing of kinds, by *not* suppressing
the kind on a tyvar-binder like
    (a :: Const Type b)
where type Const p q = p.  Even though the kind of 'a' is Type,
we don't want to suppress the kind ascription.  Example: the
error message for polykinds/T18451{a,b}. See GHC.Core.TyCo.Ppr
Note [Suppressing * kinds].

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02133353 by Zubin Duggal at 2020-07-25T00:44:30-04:00
Simplify XRec definition
Change `Located X` usage to `XRec pass X`
This increases the scope of the LPat experiment to almost all of GHC.
Introduce UnXRec and MapXRec classes

Fixes #17587 and #18408

Updates haddock submodule

Co-authored-by: Philipp Krüger <philipp.krueger1 at gmail.com>

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e443846b by Sylvain Henry at 2020-07-25T00:45:07-04:00
DynFlags: store printer in TraceBinIfaceReading

We don't need to pass the whole DynFlags, just pass the logging
function, if any.

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15b2b44f by Sylvain Henry at 2020-07-25T00:45:08-04:00
Rename GHC.Driver.Ways into GHC.Platform.Ways

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342a01af by Sylvain Henry at 2020-07-25T00:45:08-04:00
Add GHC.Platform.Profile

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6333d739 by Sylvain Henry at 2020-07-25T00:45:08-04:00
Put PlatformConstants into Platform

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9dfeca6c by Sylvain Henry at 2020-07-25T00:45:08-04:00
Remove platform constant wrappers

Platform constant wrappers took a DynFlags parameter, hence implicitly
used the target platform constants. We removed them to allow support
for several platforms at once (#14335) and to avoid having to pass
the full DynFlags to every function (#17957).

Metric Decrease:
   T4801

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73145d57 by Sylvain Henry at 2020-07-25T00:45:08-04:00
Remove dead code in utils/derivConstants

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7721b923 by Sylvain Henry at 2020-07-25T00:45:08-04:00
Move GHC.Platform into the compiler

Previously it was in ghc-boot so that ghc-pkg could use it. However it
wasn't necessary because ghc-pkg only uses a subset of it: reading
target arch and OS from the settings file. This is now done via
GHC.Platform.ArchOS (was called PlatformMini before).

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459afeb5 by Sylvain Henry at 2020-07-25T00:45:08-04:00
Fix build systems

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9e2930c3 by Sylvain Henry at 2020-07-25T00:45:08-04:00
Bump CountParserDeps

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6e2db34b by Sylvain Henry at 2020-07-25T00:45:08-04:00
Add accessors to ArchOS

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fc0f6fbc by Stefan Schulze Frielinghaus at 2020-07-25T00:45:45-04:00
Require SMP support in order to build a threaded stage1

Fixes 18266

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9b78d4ce by Vladislav Zavialov at 2020-07-26T07:34:51-04:00
Improve NegativeLiterals (#18022, GHC Proposal #344)

Before this patch, NegativeLiterals used to parse x-1 as x (-1).

This may not be what the user expects, and now it is fixed:
x-1 is parsed as (-) x 1.

We achieve this by the following requirement:

  * When lexing a negative literal,
    it must not be preceded by a 'closing token'.

This also applies to unboxed literals, e.g. -1#.

See GHC Proposal #229 for the definition of a closing token.

A nice consequence of this change is that -XNegativeLiterals becomes a
subset of -XLexicalNegation. In other words, enabling both of those
extensions has the same effect as enabling -XLexicalNegation alone.

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30 changed files:

- compiler/GHC.hs
- compiler/GHC/ByteCode/InfoTable.hs
- compiler/GHC/Cmm/CLabel.hs
- compiler/GHC/Cmm/CallConv.hs
- compiler/GHC/Cmm/Graph.hs
- compiler/GHC/Cmm/Info.hs
- compiler/GHC/Cmm/Info/Build.hs
- compiler/GHC/Cmm/LayoutStack.hs
- compiler/GHC/Cmm/Monad.hs
- compiler/GHC/Cmm/Parser.y
- compiler/GHC/Cmm/Type.hs
- compiler/GHC/Cmm/Utils.hs
- compiler/GHC/CmmToAsm.hs
- compiler/GHC/CmmToAsm/Config.hs
- compiler/GHC/CmmToAsm/Monad.hs
- compiler/GHC/CmmToC.hs
- compiler/GHC/CmmToLlvm.hs
- compiler/GHC/Core/TyCo/Ppr.hs
- compiler/GHC/Core/Type.hs
- compiler/GHC/CoreToByteCode.hs
- compiler/GHC/CoreToStg.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Driver/CodeOutput.hs
- compiler/GHC/Driver/Finder.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Plugins.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Binds.hs
- compiler/GHC/Hs/Decls.hs
- compiler/GHC/Hs/Expr.hs

The diff was not included because it is too large.

View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/5ccd97796a5963a6087dd81e2b519f70a3bf16cc...9b78d4ce2d595d8d683b150ca4db21e16ee95035

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/5ccd97796a5963a6087dd81e2b519f70a3bf16cc...9b78d4ce2d595d8d683b150ca4db21e16ee95035
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