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<h3>
Marge Bot pushed to branch wip/marge_bot_batch_merge_job
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/17c55f6dc0bf5b995cca2bfb4f23a608e5121bd3">17c55f6d</a></strong>
<div>
<span>by Zubin Duggal</span>
<i>at 2020-04-02T22:54:30-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add outputable instances for the types in GHC.Iface.Ext.Types, add -ddump-hie
flag to dump pretty printed contents of the .hie file
Metric Increase:
hie002
Because of the regression on i386:
compile_time/bytes allocated increased from i386-linux-deb9 baseline @ HEAD~10:
Expected hie002 (normal) compile_time/bytes allocated: 583014888.0 +/-10%
Lower bound hie002 (normal) compile_time/bytes allocated: 524713399
Upper bound hie002 (normal) compile_time/bytes allocated: 641316377
Actual hie002 (normal) compile_time/bytes allocated: 877986292
Deviation hie002 (normal) compile_time/bytes allocated: 50.6 %
*** unexpected stat test failure for hie002(normal)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/68d2777664a0ea1935e9782b6987a6e581f09043">68d27776</a></strong>
<div>
<span>by Andreas Klebinger</span>
<i>at 2020-04-02T22:54:30-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Improve and refactor StgToCmm codegen for DataCons.
We now differentiate three cases of constructor bindings:
1)Bindings which we can "replace" with a reference to
an existing closure. Reference the replacement closure
when accessing the binding.
2)Bindings which we can "replace" as above. But we still
generate a closure which will be referenced by modules
importing this binding.
3)For any other binding generate a closure. Then reference
it.
Before this patch 1) did only apply to local bindings and we
didn't do 2) at all.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebaab755af6c0b0ce5ed0555dab7bb61dbd0df26">ebaab755</a></strong>
<div>
<span>by Moritz Bruder</span>
<i>at 2020-04-02T22:54:32-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add singleton to NonEmpty in libraries/base
This adds a definition to construct a singleton non-empty list
(Data.List.NonEmpty) according to issue #17851.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e92b296a0effad1240c803cc6e789ce2a13cdf06">e92b296a</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-04-02T22:54:37-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Testsuite: measure compiler stats for T16190
We were mistakenly measuring program stats
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5fde172ac4f9e3f9127ee82f3eb27049e3bf6904">5fde172a</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-04-02T22:54:37-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Move blob handling into StgToCmm
Move handling of big literal strings from CmmToAsm to StgToCmm. It
avoids the use of `sdocWithDynFlags` (cf #10143). We might need to move
this handling even higher in the pipeline in the future (cf #17960):
this patch will make it easier.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/713610237f890117f83ca1a6143f112048e10930">71361023</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-04-02T22:54:37-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Refactor CmmStatics
In !2959 we noticed that there was some redundant code (in GHC.Cmm.Utils
and GHC.Cmm.StgToCmm.Utils) used to deal with `CmmStatics` datatype
(before SRT generation) and `RawCmmStatics` datatype (after SRT
generation).
This patch removes this redundant code by using a single GADT for
(Raw)CmmStatics.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/1b6ea036d2a6af0b28a2be279b5b5d7fd9c45b19">1b6ea036</a></strong>
<div>
<span>by Maxim Koltsov</span>
<i>at 2020-04-02T22:54:38-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix haddock formatting in Control.Monad.ST.Lazy.Imp.hs
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f6737ff85228569d0ec5aa99959daf7049266a7e">f6737ff8</a></strong>
<div>
<span>by Andreas Klebinger</span>
<i>at 2020-04-02T22:54:39-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Turn newlines into spaces for hadrian/ghci.
The newlines break the command on windows.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7470086a0c6617f020897ca1215a98561fabcf73">7470086a</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-02T22:54:39-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Major improvements to the specialiser
This patch is joint work of Alexis King and Simon PJ. It does some
significant refactoring of the type-class specialiser. Main highlights:
* We can specialise functions with types like
f :: Eq a => a -> Ord b => b => blah
where the classes aren't all at the front (#16473). Here we can
correctly specialise 'f' based on a call like
f @Int @Bool dEqInt x dOrdBool
This change really happened in an earlier patch
commit 2d0cf6252957b8980d89481ecd0b79891da4b14b
Author: Sandy Maguire <sandy@sandymaguire.me>
Date: Thu May 16 12:12:10 2019 -0400
work that this new patch builds directly on that work, and refactors
it a bit.
* We can specialise functions with implicit parameters (#17930)
g :: (?foo :: Bool, Show a) => a -> String
Previously we could not, but now they behave just like a non-class
argument as in 'f' above.
* We can specialise under-saturated calls, where some (but not all of
the dictionary arguments are provided (#17966). For example, we can
specialise the above 'f' based on a call
map (f @Int dEqInt) xs
even though we don't (and can't) give Ord dictionary.
This may sound exotic, but #17966 is a program from the wild, and
showed significant perf loss for functions like f, if you need
saturation of all dictionaries.
* We fix a buglet in which a floated dictionary had a bogus demand
(#17810), by using zapIdDemandInfo in the NonRec case of specBind.
* A tiny side benefit: we can drop dead arguments to specialised
functions; see Note [Drop dead args from specialisations]
* Fixed a bug in deciding what dictionaries are "interesting"; see
Note [Keep the old dictionaries interesting]
This is all achieved by by building on Sandy Macguire's work in
defining SpecArg, which mkCallUDs uses to describe the arguments of
the call. Main changes:
* Main work is in specHeader, which marched down the [InBndr] from the
function definition and the [SpecArg] from the call site, together.
* specCalls no longer has an arity check; the entire mechanism now
handles unders-saturated calls fine.
* mkCallUDs decides on an argument-by-argument basis whether to
specialise a particular dictionary argument; this is new.
See mk_spec_arg in mkCallUDs.
It looks as if there are many more lines of code, but I think that
all the extra lines are comments!
</pre>
</li>
</ul>
<h4>30 changed files:</h4>
<ul>
<li class="file-stats">
<a href="#f73a4fa90a8eb153bccdcfcc9f63c15edcd66785">
compiler/GHC/Cmm.hs
</a>
</li>
<li class="file-stats">
<a href="#92b713d88390e6ea489e24b6cff8a3960384c0d0">
compiler/GHC/Cmm/DebugBlock.hs
</a>
</li>
<li class="file-stats">
<a href="#47cba74ae8965f1665cd11bf2b023760ea27594e">
compiler/GHC/Cmm/Info.hs
</a>
</li>
<li class="file-stats">
<a href="#2d3721ad8de95e1144493ca545db846672cb109f">
compiler/GHC/Cmm/Info/Build.hs
</a>
</li>
<li class="file-stats">
<a href="#71e696f452eb493722d70306c6f304fc9b2f6a95">
compiler/GHC/Cmm/Parser.y
</a>
</li>
<li class="file-stats">
<a href="#00d7e888201d1d21d9b428cc9fd4aea68631c109">
compiler/GHC/Cmm/Ppr/Decl.hs
</a>
</li>
<li class="file-stats">
<a href="#f9f29a5a64a0b66967f0a7c538dbf8ad06a9f5bb">
compiler/GHC/Cmm/Utils.hs
</a>
</li>
<li class="file-stats">
<a href="#f71fa75baa7807186473f09c45a9ada1b72f4c6c">
compiler/GHC/CmmToAsm/PPC/CodeGen.hs
</a>
</li>
<li class="file-stats">
<a href="#3022d7d8a06ba257d13bbd18a3347522287aa684">
compiler/GHC/CmmToAsm/PPC/Ppr.hs
</a>
</li>
<li class="file-stats">
<a href="#99b1dfe8e0e3d0c174cd8552df7d2ae70d35800a">
compiler/GHC/CmmToAsm/PPC/RegInfo.hs
</a>
</li>
<li class="file-stats">
<a href="#1684e8db5c0d415248dabe224ffe70205adc6b0f">
compiler/GHC/CmmToAsm/Ppr.hs
</a>
</li>
<li class="file-stats">
<a href="#e76eae04dea432f874db91c25e4a5725d7cc127b">
compiler/GHC/CmmToAsm/SPARC/CodeGen.hs
</a>
</li>
<li class="file-stats">
<a href="#d021ec82e5a3150376cf05ea98f89bcf0daa611e">
compiler/GHC/CmmToAsm/SPARC/CodeGen/Gen32.hs
</a>
</li>
<li class="file-stats">
<a href="#90616aa9a81a082a329014ed30f6e887c8c55be7">
compiler/GHC/CmmToAsm/SPARC/Ppr.hs
</a>
</li>
<li class="file-stats">
<a href="#13521cd94ac37285ab80cca8b3993ba32433db90">
compiler/GHC/CmmToAsm/SPARC/ShortcutJump.hs
</a>
</li>
<li class="file-stats">
<a href="#2bae5947e9412f6deebf4db7dcb89d780913130f">
compiler/GHC/CmmToAsm/X86/CodeGen.hs
</a>
</li>
<li class="file-stats">
<a href="#7b360ca84c1b9aaecc0f9de207a7698dc36514fe">
compiler/GHC/CmmToAsm/X86/Instr.hs
</a>
</li>
<li class="file-stats">
<a href="#335d279236d65dcf13f2bab3891e515cb803203c">
compiler/GHC/CmmToAsm/X86/Ppr.hs
</a>
</li>
<li class="file-stats">
<a href="#76664ab267df4fc0bec2465efd78bf0afacfe3a7">
compiler/GHC/CmmToC.hs
</a>
</li>
<li class="file-stats">
<a href="#1aff3a222f2ec5c5498930c3d145b401cc300028">
compiler/GHC/CmmToLlvm.hs
</a>
</li>
<li class="file-stats">
<a href="#c74cd867f4159f4c755af854485b9cc98fbc55fe">
compiler/GHC/CmmToLlvm/Data.hs
</a>
</li>
<li class="file-stats">
<a href="#41223cea954a6fb02becb6018d5d7ff7467b31fc">
compiler/GHC/CmmToLlvm/Ppr.hs
</a>
</li>
<li class="file-stats">
<a href="#d52bc1e90d7432064a2998de2a2751b6fecb7680">
compiler/GHC/Core/Op/Specialise.hs
</a>
</li>
<li class="file-stats">
<a href="#708fab0a51bd47227233eda4698e750ff6de66e0">
compiler/GHC/Core/Subst.hs
</a>
</li>
<li class="file-stats">
<a href="#2811a7297b8aa206197ac1f5dabd0818e3c7ec5a">
compiler/GHC/Core/Unfold.hs
</a>
</li>
<li class="file-stats">
<a href="#2e5692f568fd7b67a6b172e2a60469da8392508c">
compiler/GHC/Driver/Flags.hs
</a>
</li>
<li class="file-stats">
<a href="#9a679a2680ef6061397f1987091ea9f96ffe095d">
compiler/GHC/Driver/Main.hs
</a>
</li>
<li class="file-stats">
<a href="#774d88050336ef660c7a219fb06c480c2fc639bc">
compiler/GHC/Driver/Session.hs
</a>
</li>
<li class="file-stats">
<a href="#65e2067fbb7377818b6cadff0531f44029499948">
compiler/GHC/HsToCore/Binds.hs
</a>
</li>
<li class="file-stats">
<a href="#d29ec9f7b91b6b1c871d5cd8fe463ef9952e9597">
compiler/GHC/Iface/Ext/Debug.hs
</a>
</li>
</ul>
<h5>The diff was not included because it is too large.</h5>
</div>
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