[Git][ghc/ghc][wip/simplifier-tweaks] 68 commits: JS: clean up some foreign imports
Simon Peyton Jones (@simonpj)
gitlab at gitlab.haskell.org
Fri Dec 8 17:48:18 UTC 2023
Simon Peyton Jones pushed to branch wip/simplifier-tweaks at Glasgow Haskell Compiler / GHC
Commits:
faff671a by Luite Stegeman at 2023-11-17T14:12:51+01:00
JS: clean up some foreign imports
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856e0a4e by Sven Tennie at 2023-11-18T06:54:11-05:00
AArch64: Remove unused instructions
As these aren't ever emitted, we don't even know if they work or will
ever be used. If one of them is needed in future, we may easily re-add
it.
Deleted instructions are:
- CMN
- ANDS
- BIC
- BICS
- EON
- ORN
- ROR
- TST
- STP
- LDP
- DMBSY
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615441ef by Alan Zimmerman at 2023-11-18T06:54:46-05:00
EPA: Replace Monoid with NoAnn
Remove the final Monoid instances in the exact print infrastructure.
For Windows CI
Metric Decrease:
T5205
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5a6c49d4 by David Feuer at 2023-11-20T18:53:18-05:00
Speed up stimes in instance Semigroup Endo
As discussed at
https://github.com/haskell/core-libraries-committee/issues/4
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cf9da4b3 by Andrew Lelechenko at 2023-11-20T18:53:18-05:00
base: reflect latest changes in the changelog
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48bf364e by Alan Zimmerman at 2023-11-20T18:53:54-05:00
EPA: Use SrcSpan in EpaSpan
This is more natural, since we already need to deal with invalid
RealSrcSpans, and that is exactly what SrcSpan.UnhelpfulSpan is for.
Updates haddock submodule.
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97ec37cc by Sebastian Graf at 2023-11-20T18:54:31-05:00
Add regression test for #6070
Fixes #6070.
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e9d5ae41 by Owen Shepherd at 2023-11-21T18:32:23-05:00
chore: Correct typo in the gitlab MR template
[skip ci]
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f158a8d0 by Rodrigo Mesquita at 2023-11-21T18:32:59-05:00
Improve error message when reading invalid `.target` files
A `.target` file generated by ghc-toolchain or by configure can become
invalid if the target representation (`Toolchain.Target`) is changed
while the files are not re-generated by calling `./configure` or
`ghc-toolchain` again. There is also the issue of hadrian caching the
dependencies on `.target` files, which makes parsing fail when reading
reading the cached value if the representation has been updated.
This patch provides a better error message in both situations, moving
away from a terrible `Prelude.read: no parse` error that you would get
otherwise.
Fixes #24199
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955520c6 by Ben Gamari at 2023-11-21T18:33:34-05:00
users guide: Note that QuantifiedConstraints implies ExplicitForAll
Fixes #24025.
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17ec3e97 by Owen Shepherd at 2023-11-22T09:37:28+01:00
fix: Change type signatures in NonEmpty export comments to reflect reality
This fixes several typos in the comments of
Data.List.NonEmpty export list items.
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2fd78f9f by Samuel Thibault at 2023-11-22T11:49:13-05:00
Fix the platform string for GNU/Hurd
As commited in Cargo
https://github.com/haskell/cabal/pull/9434
there is confusion between "gnu" and "hurd". This got fixed in Cargo, we
need the converse in Hadrian.
Fixes #24180
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a79960fe by Alan Zimmerman at 2023-11-22T11:49:48-05:00
EPA: Tuple Present no longer has annotation
The Present constructor for a Tuple argument will never have an exact
print annotation. So make this impossible.
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121c9ab7 by David Binder at 2023-11-22T21:12:29-05:00
Unify the hpc testsuites
The hpc testsuite was split between testsuite/tests/hpc
and the submodule libraries/hpc/test. This commit unifies
the two testsuites in the GHC repository in the directory
testsuite/tests/hpc.
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d2733a05 by Alan Zimmerman at 2023-11-22T21:13:05-05:00
EPA: empty tup_tail has noAnn
In Parser.y, the tup_tail rule had the following option
| {- empty -} %shift { return [Left noAnn] }
Once this works through PostProcess.hs, it means we add an extra
Missing constructor if the last item was a comma.
Change the annotation type to a Bool to indicate this, and use the
EpAnn Anchor for the print location for the others.
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fa576eb8 by Andreas Klebinger at 2023-11-24T08:29:13-05:00
Fix FMA primops generating broken assembly on x86.
`genFMA3Code` assumed that we had to take extra precations to avoid overwriting
the result of `getNonClobberedReg`. One of these special cases caused a bug resulting
in broken assembly.
I believe we don't need to hadle these cases specially at all, which means this MR simply
deletes the special cases to fix the bug.
Fixes #24160
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34d86315 by Alan Zimmerman at 2023-11-24T08:29:49-05:00
EPA: Remove parenthesizeHsType
This is called from PostProcess.hs, and adds spurious parens.
With the looser version of exact printing we had before we could
tolerate this, as they would be swallowed by the original at the same
place.
But with the next change (remove EpAnnNotUsed) they result in
duplicates in the output.
For Darwin build:
Metric Increase:
MultiLayerModulesTH_OneShot
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3ede659d by Vladislav Zavialov at 2023-11-26T06:43:32-05:00
Add name for -Wdeprecated-type-abstractions (#24154)
This warning had no name or flag and was triggered unconditionally.
Now it is part of -Wcompat.
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7902ebf8 by Alan Zimmerman at 2023-11-26T06:44:08-05:00
EPA: Remove EpAnnNotUsed
We no longer need the EpAnnNotUsed constructor for EpAnn, as we can
represent an unused annotation with an anchor having a EpaDelta of
zero, and empty comments and annotations.
This simplifies code handling annotations considerably.
Updates haddock submodule
Metric Increase:
parsing001
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471b2672 by Mario Blažević at 2023-11-26T06:44:48-05:00
Bumped the upper bound of text to <2.2
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d1bf25c7 by Vladislav Zavialov at 2023-11-26T11:45:49-05:00
Term variable capture (#23740)
This patch changes type variable lookup rules (lookupTypeOccRn) and
implicit quantification rules (filterInScope) so that variables bound
in the term namespace can be captured at the type level
{-# LANGUAGE RequiredTypeArguments #-}
f1 x = g1 @x -- `x` used in a type application
f2 x = g2 (undefined :: x) -- `x` used in a type annotation
f3 x = g3 (type x) -- `x` used in an embedded type
f4 x = ...
where g4 :: x -> x -- `x` used in a type signature
g4 = ...
This change alone does not allow us to accept examples shown above,
but at least it gets them past the renamer.
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da863d15 by Vladislav Zavialov at 2023-11-26T11:46:26-05:00
Update Note [hsScopedTvs and visible foralls]
The Note was written before GHC gained support for visible forall in
types of terms. Rewrite a few sentences and use a better example.
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b5213542 by Matthew Pickering at 2023-11-27T12:53:59-05:00
testsuite: Add mechanism to collect generic metrics
* Generalise the metric logic by adding an additional field which
allows you to specify how to query for the actual value. Previously
the method of querying the baseline value was abstracted (but always
set to the same thing).
* This requires rejigging how the stat collection works slightly but now
it's more uniform and hopefully simpler.
* Introduce some new "generic" helper functions for writing generic
stats tests.
- collect_size ( deviation, path )
Record the size of the file as a metric
- stat_from_file ( metric, deviation, path )
Read a value from the given path, and store that as a metric
- collect_generic_stat ( metric, deviation, get_stat)
Provide your own `get_stat` function, `lambda way: <Int>`, which
can be used to establish the current value of the metric.
- collect_generic_stats ( metric_info ):
Like collect_generic_stat but provide the whole dictionary of metric
definitions.
{ metric: {
deviation: <Int>
current: lambda way: <Int>
} }
* Introduce two new "size" metrics for keeping track of build products.
- `size_hello_obj` - The size of `hello.o` from compiling hello.hs
- `libdir` - The total size of the `libdir` folder.
* Track the number of modules in the AST tests
- CountDepsAst
- CountDepsParser
This lays the infrastructure for #24191 #22256 #17129
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7d9a2e44 by ARATA Mizuki at 2023-11-27T12:54:39-05:00
x86: Don't require -mavx2 when using 256-bit floating-point SIMD primitives
Fixes #24222
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4e5ff6a4 by Alan Zimmerman at 2023-11-27T12:55:15-05:00
EPA: Remove SrcSpanAnn
Now that we only have a single constructor for EpAnn, And it uses a
SrcSpan for its location, we can do away with SrcSpanAnn completely.
It only existed to wrap the original SrcSpan in a location, and
provide a place for the exact print annotation.
For darwin only:
Metric Increase:
MultiLayerModulesTH_OneShot
Updates haddock submodule
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e05bca39 by Krzysztof Gogolewski at 2023-11-28T08:00:55-05:00
testsuite: don't initialize testdir to '.'
The test directory is removed during cleanup, if there's an interrupt
that could remove the entire repository.
Fixes #24219
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af881674 by Alan Zimmerman at 2023-11-28T08:01:30-05:00
EPA: Clean up mkScope in Ast.hs
Now that we have HasLoc we can get rid of all the custom variants of
mkScope
For deb10-numa
Metric Increase:
libdir
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292983c8 by Ben Gamari at 2023-11-28T22:44:28-05:00
distrib: Rediscover otool and install_name_tool on Darwin
In the bindist configure script we must rediscover the `otool` and
`install_name_tool`s since they may be different from the build
environment.
Fixes #24211.
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dfe1c354 by Stefan Schulze Frielinghaus at 2023-11-28T22:45:04-05:00
llvmGen: Align objects in the data section
Objects in the data section may be referenced via tagged pointers.
Thus, align those objects to a 4- or 8-byte boundary for 32- or 64-bit
platforms, respectively. Note, this may need to be reconsidered if
objects with a greater natural alignment requirement are emitted as e.g.
128-bit atomics.
Fixes #24163.
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f6c486c3 by Matthew Pickering at 2023-11-29T11:08:13-05:00
metrics: Widen libdir and size_hello_obj acceptance window
af8816740d9b8759be1a22af8adcb5f13edeb61d shows that the libdir size can
fluctuate quite significantly even when the change is quite small.
Therefore we widen the acceptance window to 10%.
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99a6a49c by Alan Zimmerman at 2023-11-29T11:08:49-05:00
EPA: Clean up TC Monad Utils
We no longer need the alternative variant of addLocM (addLocMA)
nor wrapLocAM, wrapLocSndMA.
aarch64-darwin
Metric Increase:
MultiLayerModulesTH_OneShot
deb10-numa-slow
Metric Decrease:
libdir
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cbc03fa0 by Sebastian Graf at 2023-11-30T12:37:21-05:00
perf tests: Move comments into new `Note [Sensitivity to unique increment]` (#19414)
And additionally to T12545, link from T8095, T13386 to this new Note.
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c7623b22 by Alan Zimmerman at 2023-11-30T12:37:56-05:00
EPA: EpaDelta for comment has no comments
EpaLocation is used to position things. It has two constructors,
EpaSpan holding a SrcSpan, and EpaDelta with a delta position and a
possible list of comments. The comment list is needed because the
location in EpaDelta has no absolute information to decide which
comments should be emitted before them when printing.
But it is also used for specifying the position of a comment. To
prevent the absurdity of a comment position having a list of comments
in it, we make EpaLocation parameterisable, using comments for the
normal case and a constant for within comments.
Updates haddock submodule.
aarch64-darwin
Metric Decrease:
MultiLayerModulesTH_OneShot
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bd8acc0c by Krzysztof Gogolewski at 2023-11-30T12:38:32-05:00
Kind-check body of a required forall
We now require that in 'forall a -> ty', ty has kind TYPE r for some r.
Fixes #24176
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010fb784 by Owen Shepherd at 2023-12-03T00:10:09-05:00
docs(NonEmpty/group): Remove incorrect haddock link quotes in code block
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cda9c12d by Owen Shepherd at 2023-12-03T00:10:09-05:00
docs(NonEmpty/group): Remove cycle from group haddock example
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495265b9 by Owen Shepherd at 2023-12-03T00:10:09-05:00
docs(NonEmpty/group): Use repl haddock syntax in group docs
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d134d1de by Owen Shepherd at 2023-12-03T00:10:09-05:00
docs(NonEmpty/group): Use list [] notation in group haddock
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dfcf629c by Owen Shepherd at 2023-12-03T00:10:10-05:00
docs(NonEmpty/group): Specify final property of group function in haddock
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cad3b734 by Owen Shepherd at 2023-12-03T00:10:10-05:00
fix: Add missing property of List.group
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bad37656 by Matthew Pickering at 2023-12-03T00:10:46-05:00
testsuite: Fix T21097b test with make 4.1 (deb9)
cee81370cd6ef256f66035e3116878d4cb82e28b recently added a test which
failed on deb9 because the version of make was emitting the recipe
failure to stdout rather than stderr.
One way to fix this is to be more precise in the test about which part
of the output we care about inspecting.
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5efdf421 by Matthew Pickering at 2023-12-03T00:11:21-05:00
testsuite: Track size of libdir in bytes
For consistency it's better if we track all size metrics in bytes.
Metric Increase:
libdir
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f5eb0f29 by Matthew Pickering at 2023-12-03T00:11:22-05:00
testsuite: Remove rogue trace in testsuite
I accidentally left a trace in the generics metric patch.
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d5610737 by Claudio Bley at 2023-12-06T16:13:33-05:00
Only exit ghci in -e mode when :add command fails
Previously, when running `ghci -e ':add Sample.hs'` the process would
exit with exit code 1 if the file exists and could be loaded.
Fixes #24115
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0f0c53a5 by Vladislav Zavialov at 2023-12-06T16:14:09-05:00
T2T in Patterns (#23739)
This patch implements the T2T (term-to-type) transformation in patterns.
Patterns that are checked against a visible forall can now be written
without the `type` keyword:
\(type t) (x :: t) -> ... -- old
\t (x :: t) -> ... -- new
The `t` binder is parsed and renamed as a term pattern (Pat), but
then undergoes a conversion to a type pattern (HsTyPat).
See the new function pat_to_type_pat in compiler/GHC/Tc/Gen/Pat.hs
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10a1a6c6 by Sebastian Graf at 2023-12-06T16:14:45-05:00
Pmc: Fix SrcLoc and warning for incomplete irrefutable pats (#24234)
Before, the source location would point at the surrounding function definition,
causing the confusion in #24234.
I also took the opportunity to introduce a new `LazyPatCtx :: HsMatchContext _`
to make the warning message say "irrefutable pattern" instead of "pattern
binding".
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36b9a38c by Matthew Pickering at 2023-12-06T16:15:21-05:00
libraries: Bump filepath to 1.4.200.1 and unix to 2.8.4.0
Updates filepath submodule
Updates unix submodule
Fixes #24240
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91ff0971 by Matthew Pickering at 2023-12-06T16:15:21-05:00
Submodule linter: Allow references to tags
We modify the submodule linter so that if the bumped commit is a
specific tag then the commit is accepted.
Fixes #24241
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86f652dc by Zubin Duggal at 2023-12-06T16:15:21-05:00
hadrian: set -Wno-deprecations for directory and Win32
The filepath bump to 1.4.200.1 introduces a deprecation warning.
See https://gitlab.haskell.org/ghc/ghc/-/issues/24240
https://github.com/haskell/filepath/pull/206
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7ac6006e by Sylvain Henry at 2023-12-06T16:16:02-05:00
Zap OccInfo on case binders during StgCse #14895 #24233
StgCse can revive dead binders:
case foo of dead { Foo x y -> Foo x y; ... }
===>
case foo of dead { Foo x y -> dead; ... } -- dead is no longer dead
So we must zap occurrence information on case binders.
Fix #14895 and #24233
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57c391c4 by Sebastian Graf at 2023-12-06T16:16:37-05:00
Cpr: Turn an assertion into a check to deal with some dead code (#23862)
See the new `Note [Dead code may contain type confusions]`.
Fixes #23862.
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c1c8abf8 by Zubin Duggal at 2023-12-08T02:25:07-05:00
testsuite: add test for #23944
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6329d308 by Zubin Duggal at 2023-12-08T02:25:07-05:00
driver: Only run a dynamic-too pipeline if object files are going to be generated
Otherwise we run into a panic in hscMaybeWriteIface: "Unexpected DT_Dyn state
when writing simple interface" when dynamic-too is enabled
We could remove the panic and just write the interface even if the state is `DT_Dyn`,
but it seems pointless to run the pipeline twice when `hscMaybeWriteIface` is already
designed to write both `hi` and `dyn_hi` files if dynamic-too is enabled.
Fixes #23944.
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7bc07cbe by Simon Peyton Jones at 2023-12-08T12:00:41+00:00
Several improvements to the handling of coercions
* Make `mkSymCo` and `mkInstCo` smarter
Fixes #23642
* Fix return role of `SelCo` in the coercion optimiser.
Fixes #23617
* Make the coercion optimiser `opt_trans_rule` work better for newtypes
Fixes #23619
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f4df2696 by Simon Peyton Jones at 2023-12-08T12:00:41+00:00
Simplifier improvements
This MR started as: allow the simplifer to do more in one pass,
arising from places I could see the simplifier taking two iterations
where one would do. But it turned into a larger project, because
these changes unexpectedly made inlining blow up, especially join
points in deeply-nested cases.
The net result is good: a 2% improvement in compile time. The table
below shows changes over 1%.
The main changes are:
* The SimplEnv now has a seInlineDepth field, which says how deep
in unfoldings we are. See Note [Inline depth] in Simplify.Env
* Avoid repeatedly simplifying coercions.
see Note [Avoid re-simplifying coercions] in Simplify.Iteration
As you'll see from the Note, this makes use of the seInlineDepth.
* Allow Simplify.Utils.postInlineUnconditionally to inline variables
that are used exactly once. See Note [Post-inline for single-use things].
* Allow Simplify.Iteration.simplAuxBind to inline used-once things.
This is another part of Note [Post-inline for single-use things], and
is really good for reducing simplifier iterations in situations like
case K e of { K x -> blah }
wher x is used once in blah.
* Make GHC.Core.SimpleOpt.exprIsConApp_maybe do some simple case
elimination. Note [Case elim in exprIsConApp_maybe]
* When making join points, don't do so if the join point is so small
it will immediately be inlined. See Note [Duplicating alternatives]
* Do not add an unfolding to a join point at birth. This is a tricky one
and has a long Note [Do not add unfoldings to join points at birth]
It shows up in two places
- In `mkDupableAlt` do not add an inlining
- (trickier) In `simplLetUnfolding` don't add an unfolding for a
fresh join point
I am not fully satisifed with this, but it works and is well documented.
* Many new or rewritten Notes. E.g. Note [Avoiding simplifying repeatedly]
I discovered that GHC.HsToCore.Pmc.Solver.Types.trvVarInfo was very
delicately balanced. It's a small, heavily used, overloaded function
and it's important that it inlines. By a fluke it was before, but at
various times in my journey it stopped doing so. So I added an INLINE
pragma to it.
Metrics: compile_time/bytes allocated
------------------------------------------------
CoOpt_Singletons(normal) -4.3% GOOD
LargeRecord(normal) -23.3% GOOD
PmSeriesS(normal) -2.4%
T11195(normal) -1.7%
T12227(normal) -20.0% GOOD
T12545(normal) -5.4%
T13253-spj(normal) -50.7% GOOD
T13386(normal) -5.1% GOOD
T14766(normal) -2.4% GOOD
T15164(normal) -1.7%
T15304(normal) +1.0%
T15630(normal) -7.7%
T15630a(normal) NEW
T15703(normal) -7.5% GOOD
T16577(normal) -5.1% GOOD
T17516(normal) -3.6%
T18223(normal) -16.8% GOOD
T18282(normal) -1.5%
T18304(normal) +1.9%
T21839c(normal) -3.5% GOOD
T3064(normal) -1.5%
T5030(normal) -16.2% GOOD
T5321Fun(normal) -1.6%
T6048(optasm) -2.1% GOOD
T8095(normal) -6.1% GOOD
T9630(normal) -5.1% GOOD
WWRec(normal) -1.6%
geo. mean -2.1%
minimum -50.7%
maximum +1.9%
Metric Decrease:
CoOpt_Singletons
LargeRecord
T12227
T13253-spj
T13386
T14766
T15703
T16577
T18223
T21839c
T5030
T6048
T8095
T9630
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fe0ed3df by Simon Peyton Jones at 2023-12-08T12:00:41+00:00
Improve postInlineUnconditionally
This commit adds two things to postInlineUnconditionally:
1. Do not postInlineUnconditionally join point, ever.
Doing so does not reduce allocation, which is the main point,
and with join points that are used a lot it can bloat code.
See point (1) of Note [Duplicating join points] in
GHC.Core.Opt.Simplify.Iteration.
2. Do not postInlineUnconditionally a strict (demanded) binding.
It will not allocate a thunk (it'll turn into a case instead)
so again the main point of inlining it doesn't hold. Better
to check per-call-site.
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6e023d30 by Simon Peyton Jones at 2023-12-08T12:00:41+00:00
Update testsuite output
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58c29d08 by Simon Peyton Jones at 2023-12-08T12:00:41+00:00
Try effect of
* making multi-branch cases not work free (fixes #22423)
* use plan A for dataToTag and tagToEnum
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8264837a by Simon Peyton Jones at 2023-12-08T12:00:41+00:00
More changes
* No floating at all for join points
* Never inline j x = I x
Example: integerSignum !j = IS (integerSignum# j)
We want this to inline and then cancel with an enclosing case.
But it won't if we have changed it to
integerSignum x = case x of
IN a -> IS (...)
IS b -> IS (...)
IP c -> IS (...)
This involved changing
- UnfoldingGuidance to not say always-inline for j x = Ix
- callSiteInline to inline join points only if there is a real
benefit
- ok_to_dup_alt in Simplify.Iteration
* Row back (for now) on changes to GHC.Core.Utils.ExprIsCheap
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9f1e9f1a by Simon Peyton Jones at 2023-12-08T12:00:41+00:00
Wibble
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1776bcb4 by Simon Peyton Jones at 2023-12-08T12:00:41+00:00
Wibble
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3d13de65 by Simon Peyton Jones at 2023-12-08T12:00:41+00:00
Further wibbles
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37c16e51 by Simon Peyton Jones at 2023-12-08T12:00:41+00:00
One more wibble
Don't float an unlifted join point
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88ac5238 by Simon Peyton Jones at 2023-12-08T12:00:41+00:00
Small wibbles
The most significant change is to mkSelCo.
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d041c77f by Simon Peyton Jones at 2023-12-08T12:00:41+00:00
Temporarily add -DDEBUG to Coercion.hs
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cd5b7209 by Simon Peyton Jones at 2023-12-08T12:00:41+00:00
Fix a missing zonk in before mkSelCo
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ab9532ca by Simon Peyton Jones at 2023-12-08T12:01:53+00:00
Wibbles
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952576b0 by Simon Peyton Jones at 2023-12-08T12:01:53+00:00
Tickish comment
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30 changed files:
- .gitlab/merge_request_templates/Default.md
- compiler/GHC/CmmToAsm/AArch64/CodeGen.hs
- compiler/GHC/CmmToAsm/AArch64/Instr.hs
- compiler/GHC/CmmToAsm/AArch64/Ppr.hs
- compiler/GHC/CmmToAsm/X86/CodeGen.hs
- compiler/GHC/CmmToAsm/X86/Instr.hs
- compiler/GHC/CmmToLlvm/Data.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/Coercion/Opt.hs
- compiler/GHC/Core/Opt/Arity.hs
- compiler/GHC/Core/Opt/CprAnal.hs
- compiler/GHC/Core/Opt/OccurAnal.hs
- compiler/GHC/Core/Opt/SetLevels.hs
- compiler/GHC/Core/Opt/Simplify/Env.hs
- compiler/GHC/Core/Opt/Simplify/Inline.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Opt/Simplify/Monad.hs
- compiler/GHC/Core/Opt/Simplify/Utils.hs
- compiler/GHC/Core/Opt/Stats.hs
- compiler/GHC/Core/SimpleOpt.hs
- compiler/GHC/Core/TyCo/Rep.hs
- compiler/GHC/Core/Unfold.hs
- compiler/GHC/Core/Unfold/Make.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs.hs
- compiler/GHC/Hs/Binds.hs
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/10e5e6ced5f3186f382c493d685aff51e253e0e9...952576b00b40e70d77ebd92e58e4880b7589db86
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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/10e5e6ced5f3186f382c493d685aff51e253e0e9...952576b00b40e70d77ebd92e58e4880b7589db86
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