[Git][ghc/ghc][wip/T13380] 25 commits: Use export list of Main module in function TcRnDriver.hs:check_main (Fix #16453)

Sebastian Graf gitlab at gitlab.haskell.org
Mon Mar 30 09:37:07 UTC 2020 


Sebastian Graf pushed to branch wip/T13380 at Glasgow Haskell Compiler / GHC


Commits:
703221f4 by Roland Senn at 2020-03-25T14:45:04-04:00
Use export list of Main module in function TcRnDriver.hs:check_main (Fix #16453)

- Provide the export list of the `Main` module as parameter to the
  `compiler/typecheck/TcRnDriver.hs:check_main` function.
- Instead of `lookupOccRn_maybe` call the function `lookupInfoOccRn`.
  It returns the list `mains_all` of all the main functions in scope.
- Select from this list `mains_all` all `main` functions that are in
  the export list of the `Main` module.
- If this new list contains exactly one single `main` function, then
  typechecking continues.
- Otherwise issue an appropriate error message.

- - - - -
3e27205a by Sebastian Graf at 2020-03-25T14:45:40-04:00
Remove -fkill-absence and -fkill-one-shot flags

They seem to be a benchmarking vestige of the Cardinality paper and
probably shouldn't have been merged to HEAD in the first place.

- - - - -
262e42aa by Peter Trommler at 2020-03-25T22:41:39-04:00
Do not panic on linker errors

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0de03cd7 by Sylvain Henry at 2020-03-25T22:42:02-04:00
DynFlags refactoring III

Use Platform instead of DynFlags when possible:
* `tARGET_MIN_INT` et al. replaced with `platformMinInt` et al.
* no more DynFlags in PreRules: added a new `RuleOpts` datatype
* don't use `wORD_SIZE` in the compiler
* make `wordAlignment` use `Platform`
* make `dOUBLE_SIZE` a constant

Metric Decrease:
    T13035
    T1969

- - - - -
7a04920b by Tristan Cacqueray at 2020-03-25T22:42:06-04:00
Base: fix a typo in liftA doc

This change removes an extra '|' that should not be rendered in
the liftA documentation.

Tracking: #17929

- - - - -
1c5a15f7 by Tristan Cacqueray at 2020-03-25T22:42:06-04:00
Base: add Control.Applicative optional example

This change adds an optional example.

Tracking: #17929

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6d172e63 by Tristan Cacqueray at 2020-03-25T22:42:06-04:00
Base: add markup around Except

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eb2162c8 by John Ericson at 2020-03-26T12:37:08-04:00
Remove unused `ghciTablesNextToCode` from compiler proper

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f51efc4b by Joachim Breitner at 2020-03-26T12:37:09-04:00
Prepare to use run-time tablesNextToCode in compiler exclusively

Factor out CPP as much as possible to prepare for runtime
determinattion.

Progress towards #15548

- - - - -
1c446220 by Joachim Breitner at 2020-03-26T12:37:09-04:00
Use run-time tablesNextToCode in compiler exclusively (#15548)

Summary:

 - There is no more use of the TABLES_NEXT_TO_CODE CPP macro in
   `compiler/`. GHCI_TABLES_NEXT_TO_CODE is also removed entirely.
   The field within `PlatformMisc` within `DynFlags` is used instead.

 - The field is still not exposed as a CLI flag. We might consider some
   way to ensure the right RTS / libraries are used before doing that.

Original reviewers:

Original subscribers: TerrorJack, rwbarton, carter

Original Differential Revision: https://phabricator.haskell.org/D5082

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1941ef4f by Sylvain Henry at 2020-03-29T17:28:51-04:00
Modules: Types (#13009)

Update Haddock submodule

Metric Increase:
   haddock.compiler

- - - - -
1c7c6f1a by Sylvain Henry at 2020-03-29T17:28:51-04:00
Remove GHC.Types.Unique.Map module

This module isn't used anywhere in GHC.

- - - - -
f1a6c73d by Sylvain Henry at 2020-03-29T17:28:51-04:00
Merge GHC.Types.CostCentre.Init into GHC.Driver.CodeOutput

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54250f2d by Simon Peyton Jones at 2020-03-29T17:29:30-04:00
Demand analysis: simplify the demand for a RHS

Ticket #17932 showed that we were using a stupid demand for the RHS
of a let-binding, when the result is a product.  This was the result
of a "fix" in 2013, which (happily) turns out to no longer be
necessary.

So I just deleted the code, which simplifies the demand analyser,
and fixes #17932. That in turn uncovered that the anticipation
of worker/wrapper in CPR analysis was inaccurate, hence the logic
that decides whether to unbox an argument in WW was extracted into
a function `wantToUnbox`, now consulted by CPR analysis.

I tried nofib, and got 0.0% perf changes.

All this came up when messing about with !2873 (ticket #17917),
but is idependent of it.

Unfortunately, this patch regresses #4267 and realised that it is now
blocked on #16335.

- - - - -
03060b2f by Ben Gamari at 2020-03-29T17:30:05-04:00
testsuite: Fix T17786 on Windows

Fixes line ending normalization issue.

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1f7995ba by Ben Gamari at 2020-03-29T17:30:05-04:00
testsuite: Fix T17786

Fix missing quoting and expected exit code.

- - - - -
ef9c608e by Ben Gamari at 2020-03-29T17:30:05-04:00
testsuite: Mark T12971 as broken on Windows

Due to #17945.

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e54500c1 by Sylvain Henry at 2020-03-29T17:30:47-04:00
Store ComponentId details

As far as GHC is concerned, installed package components ("units") are
identified by an opaque ComponentId string provided by Cabal. But we
don't want to display it to users (as it contains a hash) so GHC queries
the database to retrieve some infos about the original source package
(name, version, component name).

This patch caches these infos in the ComponentId itself so that we don't
need to provide DynFlags (which contains installed package informations)
to print a ComponentId.

In the future we want GHC to support several independent package states
(e.g. for plugins and for target code), hence we need to avoid
implicitly querying a single global package state.

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7e7cb714 by Marius Bakke at 2020-03-29T17:31:27-04:00
testsuite: Remove test that dlopens a PIE object.

glibc 2.30 disallowed dlopening PIE objects, so just remove the test.
Fixes #17952.

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6c8f80d8 by Andreas Klebinger at 2020-03-29T17:32:04-04:00
Correct haddocks for testBit in Data.Bits

It conflated the nth bit with the bit at offset n.

Now we instead give the definition in terms of `bit and `.&.`
on top of clearer phrasing.

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c916f190 by Andreas Klebinger at 2020-03-29T17:32:04-04:00
Apply suggestion to libraries/base/Data/Bits.hs
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64bf7f51 by Ben Gamari at 2020-03-29T17:32:41-04:00
gitlab-ci: Add FreeBSD release job

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a0d8e92e by Ryan Scott at 2020-03-29T17:33:20-04:00
Run checkNewDataCon before constraint-solving newtype constructors

Within `checkValidDataCon`, we used to run `checkValidType` on the
argument types of a newtype constructor before running
`checkNewDataCon`, which ensures that the user does not attempt
non-sensical things such as newtypes with multiple arguments or
constraints. This works out in most situations, but this falls over
on a corner case revealed in #17955:

```hs
newtype T = Coercible () T => T ()
```

`checkValidType`, among other things, peforms an ambiguity check on
the context of a data constructor, and that it turn invokes the
constraint solver. It turns out that there is a special case in the
constraint solver for representational equalities (read: `Coercible`
constraints) that causes newtypes to be unwrapped (see
`Note [Unwrap newtypes first]` in `TcCanonical`). This special case
does not know how to cope with an ill formed newtype like `T`, so
it ends up panicking.

The solution is surprisingly simple: just invoke `checkNewDataCon`
before `checkValidType` to ensure that the illicit newtype
constructor context is detected before the constraint solver can
run amok with it.

Fixes #17955.

- - - - -
45eb9d8c by Krzysztof Gogolewski at 2020-03-29T17:33:59-04:00
Minor cleanup

- Simplify mkBuildExpr, the function newTyVars was called
  only on a one-element list.
- TTG: use noExtCon in more places. This is more future-proof.
- In zonkExpr, panic instead of printing a warning.

- - - - -
833ac79d by Sebastian Graf at 2020-03-30T11:36:45+02:00
Preserve precise exceptions in strictness analysis

Fix #13380 and #17676 by

1. Changing `raiseIO#` to have `topDiv` instead of `botDiv`
2. Give it special treatment in `Simplifier.Util.mkArgInfo`, treating it
   as if it still had `botDiv`, to recover dead code elimination.

This is the first commit of the plan outlined in
https://gitlab.haskell.org/ghc/ghc/-/merge_requests/2525#note_260886.

- - - - -


30 changed files:

- .gitlab-ci.yml
- compiler/GHC.hs
- compiler/GHC/ByteCode/Asm.hs
- compiler/GHC/ByteCode/InfoTable.hs
- compiler/GHC/ByteCode/Instr.hs
- compiler/GHC/ByteCode/Linker.hs
- compiler/GHC/ByteCode/Types.hs
- compiler/GHC/Cmm.hs
- compiler/GHC/Cmm/BlockId.hs
- compiler/GHC/Cmm/BlockId.hs-boot
- compiler/GHC/Cmm/CLabel.hs
- compiler/GHC/Cmm/CommonBlockElim.hs
- compiler/GHC/Cmm/Dataflow.hs
- compiler/GHC/Cmm/Dataflow/Label.hs
- compiler/GHC/Cmm/DebugBlock.hs
- compiler/GHC/Cmm/Expr.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/Lexer.x
- compiler/GHC/Cmm/Lint.hs
- compiler/GHC/Cmm/Node.hs
- compiler/GHC/Cmm/Parser.y
- compiler/GHC/Cmm/Pipeline.hs
- compiler/GHC/Cmm/Ppr.hs
- compiler/GHC/Cmm/ProcPoint.hs
- compiler/GHC/Cmm/Sink.hs
- compiler/GHC/Cmm/Switch/Implement.hs
- compiler/GHC/Cmm/Utils.hs


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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/ac492646fe3453a78c3f7e5f5e97d9736f973cda...833ac79d175a652b9036a657a27d0e329b9c77df

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