[Git][ghc/ghc][wip/stgMalloc] 55 commits: Put CFG weights into their own module (#17957)

Ben Gamari gitlab at gitlab.haskell.org
Fri Sep 4 02:45:14 UTC 2020 


Ben Gamari pushed to branch wip/stgMalloc at Glasgow Haskell Compiler / GHC


Commits:
293c7fba by Sylvain Henry at 2020-08-21T09:36:38-04:00
Put CFG weights into their own module (#17957)

It avoids having to query DynFlags to get them

- - - - -
50eb4460 by Sylvain Henry at 2020-08-21T09:36:38-04:00
Don't use DynFlags in CmmToAsm.BlockLayout (#17957)

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659eb31b by Sylvain Henry at 2020-08-21T09:36:38-04:00
NCG: Dwarf configuration

* remove references to DynFlags in GHC.CmmToAsm.Dwarf
* add specific Dwarf options in NCGConfig instead of directly querying
  the debug level

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2d8ca917 by Sylvain Henry at 2020-08-21T09:37:15-04:00
Fix -ddump-stg flag

-ddump-stg was dumping the initial STG (just after Core-to-STG pass)
which was misleading because we want the final STG to know if a function
allocates or not. Now we have a new flag -ddump-stg-from-core for this and
-ddump-stg is deprecated.

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fddddbf4 by Vladislav Zavialov at 2020-08-21T09:37:49-04:00
Import qualified Prelude in Cmm/Parser.y

In preparation for the next version of 'happy', c95920 added a qualified
import to GHC/Parser.y but for some reason neglected GHC/Cmm/Parser.y

This patch adds the missing qualified import to GHC/Cmm/Parser.y and
also adds a clarifying comment to explain why this import is needed.

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989c1c27 by Ben Gamari at 2020-08-21T11:27:53-04:00
gitlab-ci: Test master branch as well

While these builds are strictly speaking redundant (since every commit
is tested by @marge-bot before making it into `master`), they are nevertheless
useful as they are displayed in the branch's commit list in GitLab's web interface.

Fixes #18595.
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e67ae884 by Aditya Gupta at 2020-08-22T03:29:00-04:00
mkUnique refactoring (#18362)

Move uniqFromMask from Unique.Supply to Unique.
Move the the functions that call mkUnique from Unique to Builtin.Uniques

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03cfcfd4 by Wander Hillen at 2020-08-22T03:29:36-04:00
Add ubuntu 20.04 jobs for nightly and release

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3f501545 by Craig Ferguson at 2020-08-22T03:30:13-04:00
Utils: clarify docs slightly

The previous comment implies `nTimes n f` is either `f^{n+1}` or
`f^{2^n}` (when in fact it's `f^n`).

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8b865092 by Krzysztof Gogolewski at 2020-08-23T14:12:53+02:00
Do not print synonyms in :i (->), :i Type (#18594)

This adds a new printing flag `sdocPrintTypeAbbreviations` that is used
specifically to avoid ghci printing 'type (->) = (->)' and 'type Type = Type'.

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d8f61182 by Krzysztof Gogolewski at 2020-08-23T14:12:56+02:00
Move pprTyTcApp' inside pprTyTcApp

No semantic change

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364258e0 by Krzysztof Gogolewski at 2020-08-24T00:32:31-04:00
Fix types in silly shifts (#18589)

Patch written by Simon. I have only added a testcase.

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b1eb38a0 by Sylvain Henry at 2020-08-24T00:33:13-04:00
Perf: make SDoc monad one-shot (#18202)

With validate-x86_64-linux-deb9-hadrian:
   T1969  -3.4% (threshold: +/-1%)
   T3294  -3.3% (threshold: +/-1%)
   T12707 -1.4% (threshold: +/-1%)

Additionally with validate-x86_64-linux-deb9-unreg-hadrian:
   T4801  -2.4% (threshold: +/-2%)
   T13035 -1.4% (threshold: +/-1%)
   T13379 -2.4% (threshold: +/-2%)
   ManyAlternatives -2.5% (threshold: +/-2%)
   ManyConstructors -3.0% (threshold: +/-2%)

Metric Decrease:
    T12707
    T1969
    T3294
    ManyAlternatives
    ManyConstructors
    T13035
    T13379
    T4801

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a77b9ec2 by Krzysztof Gogolewski at 2020-08-24T10:04:20-04:00
Add a test for #18397

The bug was fixed by !3421.

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05550a5a by Sylvain Henry at 2020-08-24T10:04:59-04:00
Avoid roundtrip through SDoc

As found by @monoidal on https://gitlab.haskell.org/ghc/ghc/-/merge_requests/3885#note_295126

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0a1ecc5f by Ben Gamari at 2020-08-25T07:37:05-04:00
SysTools.Process: Handle exceptions in readCreateProcessWithExitCode'

In #18069 we are observing MVar deadlocks from somewhere in ghc.exe.
This use of MVar stood out as being one of the more likely culprits.
Here we make sure that it is exception-safe.

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db8793ad by Richard Eisenberg at 2020-08-25T07:37:40-04:00
Use tcView, not coreView, in the pure unifier.

Addresses a lingering point within #11715.

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fb77207a by Simon Peyton Jones at 2020-08-25T07:38:16-04:00
Use LIdP rather than (XRec p (IdP p))

This patch mainly just replaces use of
    XRec p (IdP p)
with
    LIdP p

One slightly more significant change is to parameterise
HsPatSynDetails over the pass rather than the argument type,
so that it's uniform with HsConDeclDetails and HsConPatDetails.

I also got rid of the dead code GHC.Hs.type.conDetailsArgs

But this is all just minor refactoring. No change in functionality.

- - - - -
8426a136 by Krzysztof Gogolewski at 2020-08-25T07:38:54-04:00
Add a test for #18585

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2d635a50 by Takenobu Tani at 2020-08-26T04:50:21-04:00
linters: Make CPP linter skip image files

This patch adds an exclusion rule for `docs/users_guide/images`,
to avoid lint errors of PDF files.

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b7d98cb2 by Takenobu Tani at 2020-08-26T04:50:21-04:00
users-guide: Color the logo on the front page of the PDF

This patch updates the logo with a recent color scheme.
This affects only the PDF version of the user's guide.

See also:
* https://mail.haskell.org/pipermail/ghc-devs/2020-August/019139.html
* https://gitlab.haskell.org/ghc/ghc/-/wikis/logo

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0b17fa18 by Sylvain Henry at 2020-08-26T04:50:58-04:00
Refactor UnitId pretty-printing

When we pretty-print a UnitId for the user, we try to map it back to its
origin package name, version and component to print
"package-version:component" instead of some hash.

The UnitId type doesn't carry these information, so we have to look into
a UnitState to find them. This is why the Outputable instance of
UnitId used `sdocWithDynFlags` in order to access the `unitState` field
of DynFlags.

This is wrong for several reasons:

1. The DynFlags are accessed when the message is printed, not when it is
   generated. So we could imagine that the unitState may have changed
   in-between. Especially if we want to allow unit unloading.

2. We want GHC to support several independent sessions at once, hence
   several UnitState. The current approach supposes there is a unique
   UnitState as a UnitId doesn't indicate which UnitState to use.

See the Note [Pretty-printing UnitId] in GHC.Unit for the new approach
implemented by this patch.

One step closer to remove `sdocDynFlags` field from `SDocContext`
(#10143).

Fix #18124.

Also fix some Backpack code to use SDoc instead of String.

- - - - -
dc476a50 by Sylvain Henry at 2020-08-26T04:51:35-04:00
Bignum: fix BigNat subtraction (#18604)

There was a confusion between the boolean expected by
withNewWordArrayTrimedMaybe and the boolean returned by subtracting
functions.

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fcb10b6c by Peter Trommler at 2020-08-26T10:42:30-04:00
PPC and X86: Portable printing of IEEE floats

GNU as and the AIX assembler support floating point literals.
SPARC seems to have support too but I cannot test on SPARC.
Curiously, `doubleToBytes` is also used in the LLVM backend.

To avoid endianness issues when cross-compiling float and double literals
are printed as C-style floating point values. The assembler then takes
care of memory layout and endianness.

This was brought up in #18431 by @hsyl20.

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770100e0 by Krzysztof Gogolewski at 2020-08-26T10:43:13-04:00
primops: Remove Monadic and Dyadic categories

There were four categories of primops: Monadic, Dyadic, Compare, GenPrimOp.

The compiler does not treat Monadic and Dyadic in any special way,
we can just replace them with GenPrimOp.

Compare is still used in isComparisonPrimOp.

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01ff8c89 by Aditya Gupta at 2020-08-27T14:19:26-04:00
Consolidate imports in getMinimalImports (#18264)

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bacccb73 by Ryan Scott at 2020-08-27T14:20:01-04:00
Make {hsExpr,hsType,pat}NeedsParens aware of boxed 1-tuples

`hsExprNeedsParens`, `hsTypeNeedsParens`, and `patNeedsParens`
previously assumed that all uses of explicit tuples in the source
syntax never need to be parenthesized. This is true save for one
exception: boxed one-tuples, which use the `Solo` data type from
`GHC.Tuple` instead of special tuple syntax. This patch adds the
necessary logic to the three `*NeedsParens` functions to handle
`Solo` correctly.

Fixes #18612.

- - - - -
c6f50cea by Krzysztof Gogolewski at 2020-08-28T02:22:36-04:00
Add missing primop documentation (#18454)

- Add three pseudoops to primops.txt.pp, so that Haddock renders
  the documentation
- Update comments
- Remove special case for "->" - it's no longer exported from GHC.Prim
- Remove reference to Note [Compiling GHC.Prim] - the ad-hoc fix is no
  longer there after updates to levity polymorphism.
- Document GHC.Prim
- Remove the comment that lazy is levity-polymorphic.
  As far as I can tell, it never was: in 80e399639,
  only the unfolding was given an open type variable.
- Remove haddock hack in GHC.Magic - no longer neccessary after
  adding realWorld# to primops.txt.pp.

- - - - -
f065b6b0 by Tamar Christina at 2020-08-28T02:23:13-04:00
Fix use distro toolchian

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4517a382 by Tamar Christina at 2020-08-28T02:23:13-04:00
document how build system find toolchains on Windows

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329f7cb9 by Ben Gamari at 2020-08-31T22:59:14-04:00
base: Better error message on invalid getSystemTimerManager call

Previously we would produce a rather unhelpful pattern match failure
error in the case where the user called `getSystemTimerManager` in a
program which isn't built with `-threaded`. This understandably confused
the user in #15616.

Fixes #15616.

- - - - -
f6d70a8f by Roland Senn at 2020-08-31T22:59:50-04:00
Add tests for #15617.

Avoid a similar regression in the future.

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e5969fd0 by Roland Senn at 2020-08-31T23:00:27-04:00
Add additional tests for #18172 (Followup MR 3543)

There was still one active discussion [thread](https://gitlab.haskell.org/ghc/ghc/-/merge_requests/3543#note_284325) when MR !3543 got merged.

This MR adds the requested tests exercising the changes in
`compiler/GHC/HsToCore/Match/Literal.hs:warnAboutEmptyEnumerations` and its sub-functions.

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fe18b482 by Ben Gamari at 2020-08-31T23:01:02-04:00
Bump Win32 and process submodules

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2da93308 by Sylvain Henry at 2020-08-31T23:01:39-04:00
Hadrian: fix slow-validate flavour (#18586)

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85e13008 by Andreas Klebinger at 2020-08-31T23:02:15-04:00
Update dominator code with fixes from the dom-lt package.

Two bugs turned out in the package that have been fixed since.
This MR includes this fixes in the GHC port of the code.

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dffb38fa by Andreas Klebinger at 2020-08-31T23:02:15-04:00
Dominators.hs: Use unix line endings

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6189cc04 by Moritz Angermann at 2020-08-31T23:02:50-04:00
[fixup 3433] move debugBelch into IF_DEBUG(linker)

The commit in dff1cb3d9c111808fec60190747272b973547c52 incorrectly left
the `debugBelch` function without a comment or IF_DEBUG(linker,)
decoration. This rectifies it.

Needs at least a 8.10 backport, as it was backported in 6471cc6aff80d5deebbdb1bf7b677b31ed2af3d5

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bcb68a3f by Sylvain Henry at 2020-08-31T23:03:27-04:00
Don't store HomeUnit in UnitConfig

Allow the creation of a UnitConfig (hence of a UnitState) without having
a HomeUnit. It's required for #14335.

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0a372387 by Sylvain Henry at 2020-08-31T23:04:04-04:00
Fix documentation and fix "check" bignum backend (#18604)

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eb85f125 by Moritz Angermann at 2020-08-31T23:04:39-04:00
Set the dynamic-system-linker flag to Manual

This flag should be user controllable, hence Manual: True.

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380ef845 by Sven Tennie at 2020-08-31T23:05:14-04:00
Ignore more files

Ignore files from "new style" cabal builds (dist-newstyle folders) and
from clangd (C language server).

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74a7fbff by Takenobu Tani at 2020-08-31T23:05:51-04:00
Limit upper version of Happy for ghc-9.0 and earlier (#18620)

This patch adds the upper bound of a happy version for ghc-9.0
and earlier.

Currently, we can't use happy-1.20.0 for ghc-9.0.

See #18620.

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a4473f02 by Takenobu Tani at 2020-08-31T23:05:51-04:00
Limit upper version of Happy for ghc-9.2 (#18620)

This patch adds the upper bound of a happy version for ghc-9.2.

Currently, We can use happy-1.19 or happy-1.20 for ghc-9.2.

See #18620.

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a8a2568b by Sylvain Henry at 2020-08-31T23:06:28-04:00
Bignum: add BigNat compat functions (#18613)

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884245dd by Sylvain Henry at 2020-09-01T12:39:36-04:00
Fix FastString lexicographic ordering (fix #18562)

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4b4fbc58 by Sylvain Henry at 2020-09-01T12:39:36-04:00
Remove "Ord FastString" instance

FastStrings can be compared in 2 ways: by Unique or lexically. We don't
want to bless one particular way with an "Ord" instance because it leads
to bugs (#18562) or to suboptimal code (e.g. using lexical comparison
while a Unique comparison would suffice).

UTF-8 encoding has the advantage that sorting strings by their encoded
bytes also sorts them by their Unicode code points, without having to
decode the actual code points. BUT GHC uses Modified UTF-8 which
diverges from UTF-8 by encoding \0 as 0xC080 instead of 0x00 (to avoid
null bytes in the middle of a String so that the string can still be
null-terminated). This patch adds a new `utf8CompareShortByteString`
function that performs sorting by bytes but that also takes Modified
UTF-8 into account. It is much more performant than decoding the strings
into [Char] to perform comparisons (which we did in the previous patch).

Bump haddock submodule

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b4edcde7 by Ben Gamari at 2020-09-01T14:53:42-04:00
testsuite: Add broken test for #18302

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bfab2a30 by Sebastian Graf at 2020-09-02T15:54:55-04:00
Turn on -XMonoLocalBinds by default (#18430)

And fix the resulting type errors.

Co-authored-by: Krzysztof Gogolewski <krz.gogolewski at gmail.com>

Metric Decrease:
    parsing001

- - - - -
c30cc0e9 by David Feuer at 2020-09-02T15:55:31-04:00
Remove potential space leak from Data.List.transpose

Previously, `transpose` produced a list of heads
and a list of tails independently. This meant that
a function using only some heads, and only some tails,
could potentially leak space. Use `unzip` to work
around the problem by producing pairs and selector
thunks instead. Time and allocation behavior will
be worse, but there should be no more leak potential.
- - - - -
ffc3da47 by Sylvain Henry at 2020-09-02T15:56:11-04:00
Remove outdated note

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85e62123 by Sylvain Henry at 2020-09-02T15:56:48-04:00
Bignum: add missing compat import/export functions

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397c2b03 by Ben Gamari at 2020-09-03T17:31:47-04:00
configure: Work around Raspbian's silly packaging decisions

See #17856.

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4891c18a by Kathryn Spiers at 2020-09-03T17:32:24-04:00
expected-undocumented-flags remove kill flags

It looks like the flags were removed in https://gitlab.haskell.org/ghc/ghc/-/commit/3e27205a66b06a4501d87eb31e285eadbc693eb7
and can safely be removed here
- - - - -
20d4404d by GHC GitLab CI at 2020-09-03T22:45:03-04:00
rts: Consistently use stgMallocBytes instead of malloc

This can help in debugging RTS memory leaks since all allocations go
through the same interface.

- - - - -


30 changed files:

- .gitignore
- .gitlab-ci.yml
- .gitlab/linters/check-cpp.py
- aclocal.m4
- compiler/GHC.hs
- compiler/GHC/Builtin/Names.hs
- compiler/GHC/Builtin/Names/TH.hs
- compiler/GHC/Builtin/PrimOps.hs
- compiler/GHC/Builtin/Types.hs
- compiler/GHC/Builtin/Types.hs-boot
- compiler/GHC/Builtin/Types/Literals.hs
- compiler/GHC/Builtin/Types/Prim.hs
- compiler/GHC/Builtin/Uniques.hs
- compiler/GHC/Builtin/Uniques.hs-boot
- compiler/GHC/Builtin/Utils.hs
- compiler/GHC/Builtin/primops.txt.pp
- compiler/GHC/Cmm/CLabel.hs
- compiler/GHC/Cmm/Info/Build.hs
- compiler/GHC/Cmm/Parser.y
- compiler/GHC/CmmToAsm.hs
- compiler/GHC/CmmToAsm/BlockLayout.hs
- compiler/GHC/CmmToAsm/CFG.hs
- compiler/GHC/CmmToAsm/CFG/Dominators.hs
- + compiler/GHC/CmmToAsm/CFG/Weight.hs
- compiler/GHC/CmmToAsm/Config.hs
- compiler/GHC/CmmToAsm/Dwarf.hs
- compiler/GHC/CmmToAsm/Monad.hs
- compiler/GHC/CmmToAsm/PPC/Ppr.hs
- compiler/GHC/CmmToAsm/Ppr.hs
- compiler/GHC/CmmToAsm/Reg/Graph/Base.hs


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