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<h3 style="margin-top: 20px; margin-bottom: 10px;">
Marge Bot pushed to branch master at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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Commits:
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<ul>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/da0d8ba56f817b5e450d826413b6448a92fb68f4">da0d8ba5</a></strong>
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<span> by Matthew Craven </span> <i> at 2024-03-19T14:49:20-04:00 </i>
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<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #333238; position: relative; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>Remove unused ghc-internal module "GHC.Internal.Constants"
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b56d2761274ca5cd8ed35e5f348f7d6fe1dcd45d">b56d2761</a></strong>
<div>
<span> by Matthew Craven </span> <i> at 2024-03-19T14:49:20-04:00 </i>
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<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #333238; position: relative; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>CorePrep: Rework lowering of BigNat# literals
Don't use bigNatFromWord#, because that's terrible:
* We shouldn't have to traverse a linked list at run-time
to build a BigNat# literal. That's just silly!
* The static List object we have to create is much larger
than the actual BigNat#'s contents, bloating code size.
* We have to read the corresponding interface file,
which causes un-tracked implicit dependencies. (#23942)
Instead, encode them into the appropriate platform-dependent
sequence of bytes, and generate code that copies these bytes
at run-time from an Addr# literal into a new ByteArray#.
A ByteArray# literal would be the correct thing to generate,
but these are not yet supported; see also #17747.
Somewhat surprisingly, this change results in a slight
reduction in compiler allocations, averaging around 0.5%
on ghc's compiler performance tests, including when compiling
programs that contain no bignum literals to begin with.
The specific cause of this has not been investigated.
Since this lowering no longer reads the interface file for
GHC.Num.BigNat, the reasoning in Note [Depend on GHC.Num.Integer]
is obsoleted. But the story of un-tracked built-in dependencies
remains complex, and Note [Tracking dependencies on primitives]
now exists to explain this complexity.
Additionally, many empty imports have been modified to refer to
this new note and comply with its guidance. Several empty imports
necessary for other reasons have also been given brief explanations.
Metric Decrease:
MultiLayerModulesTH_OneShot
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30 changed files:
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<a href="#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77">
compiler/GHC/Builtin/Names.hs
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<a href="#dc9d549002b8cd260ee6d1d2fb35877c74412f91">
compiler/GHC/Builtin/PrimOps.hs-boot
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<a href="#8a5cd068459120cddf3814e7b9e02003b87647ba">
compiler/GHC/Builtin/Types/Prim.hs
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<a href="#44e32f01b1a3d9aec22f651f293800c16ac68435">
compiler/GHC/Cmm/Dominators.hs
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<a href="#8ee6f6851986ea96987a52f1dbf39228c85c6032">
compiler/GHC/Core/TyCo/Subst.hs
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<a href="#a5d27de4e3111a69f69902c65ecf7b3379f7c49a">
compiler/GHC/CoreToStg/Prep.hs
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<a href="#94adc61f980a3b6dc9f878fc565a39d134bc63a7">
compiler/GHC/Data/Word64Map/Strict.hs
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<a href="#5240ba4d079cfeb9884babd8ec4e134730308b54">
compiler/GHC/Driver/CmdLine.hs
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<a href="#515e45714efa1079dede946c7258fc0d66d9bd35">
compiler/GHC/Driver/Config/CoreToStg/Prep.hs
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compiler/GHC/Driver/Config/Diagnostic.hs
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compiler/GHC/Driver/Errors/Ppr.hs
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compiler/GHC/Iface/Errors/Ppr.hs
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<a href="#079d6b28856775716c78fdd4a4b35bb45a59002c">
compiler/GHC/Iface/Syntax.hs
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<a href="#9d6536c60c341806c9f225aafb0c120669e9d8da">
compiler/GHC/Iface/Type.hs-boot
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compiler/GHC/Parser/PostProcess.hs
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compiler/GHC/Platform.hs
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compiler/GHC/StgToJS/Types.hs
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<a href="#9f96ddf521410803c8d88c36068aa9f331da2130">
compiler/GHC/Tc/Errors/Hole/Plugin.hs-boot
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<a href="#853be4e40e8278378229838689549017ceb24683">
compiler/GHC/Tc/Types/LclEnv.hs-boot
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<a href="#f021c52a6ccf306e88c9f760b2aee33b180ba341">
compiler/GHC/Tc/Utils/Env.hs
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<a href="#08dd1e57cccda84bbea9dc84bfc8a49ac6ab2a33">
compiler/GHC/Types/Id.hs-boot
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<a href="#09829c4d9f103d3434d76755dc7d30ed236e0dde">
compiler/GHC/Types/Var.hs-boot
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<a href="#bed0ada7f0aff560813859ffa021d0c6e985a172">
compiler/GHC/Utils/Containers/Internal/StrictPair.hs
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<a href="#0f33fd88c617246c7f89c4477d2d1d24f942df23">
compiler/ghc.cabal.in
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<a href="#704603ec9f04a5ce2ffce3f6afc2e55093db90f0">
libraries/base/src/Data/Functor/Product.hs
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<a href="#38e651135ec3e31a035a7a0c46dd8320b3d8c959">
libraries/base/src/Data/Functor/Sum.hs
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<a href="#4b54f32c498e3d2bd3808dad3c35ce5114d6674b">
libraries/base/src/Data/Kind.hs
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<a href="#c163015cf304f7840cd938f9860a675c36efa348">
libraries/base/src/GHC/ConsoleHandler.hs
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<a href="#d03915bec894e2df64b84219d857bdb038e0e083">
libraries/base/src/GHC/Constants.hs
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<a href="#ff00a33839a7a2817a81bf325088b1fe0a4350b8">
libraries/base/src/GHC/IO/Encoding/CodePage.hs
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The diff was not included because it is too large.
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