[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 18 commits: Export indexError from GHC.Ix (#18579)

Marge Bot gitlab at gitlab.haskell.org
Fri Nov 20 07:42:49 UTC 2020 


 Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC


Commits:
165352a2 by Krzysztof Gogolewski at 2020-11-20T02:08:36-05:00
Export indexError from GHC.Ix (#18579)

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b57845c3 by Kamil Dworakowski at 2020-11-20T02:09:16-05:00
Clarify interruptible FFI wrt masking state

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321d1bd8 by Sebastian Graf at 2020-11-20T02:09:51-05:00
Fix strictness signatures of `prefetchValue*#` primops

Their strictness signatures said the primops are strict in their first
argument, which is wrong: Handing it a thunk will prefetch the pointer
to the thunk, but not evaluate it. Hence not strict.

The regression test `T8256` actually tests for laziness in the first
argument, so GHC apparently never exploited the strictness signature.

See also https://gitlab.haskell.org/ghc/ghc/-/issues/8256#note_310867,
where this came up.

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0aec78b6 by Sebastian Graf at 2020-11-20T02:09:51-05:00
Demand: Interleave usage and strictness demands (#18903)

As outlined in #18903, interleaving usage and strictness demands not
only means a more compact demand representation, but also allows us to
express demands that we weren't easily able to express before.

Call demands are *relative* in the sense that a call demand `Cn(cd)`
on `g` says "`g` is called `n` times. *Whenever `g` is called*, the
result is used according to `cd`". Example from #18903:

```hs
h :: Int -> Int
h m =
  let g :: Int -> (Int,Int)
      g 1 = (m, 0)
      g n = (2 * n, 2 `div` n)
      {-# NOINLINE g #-}
  in case m of
    1 -> 0
    2 -> snd (g m)
    _ -> uncurry (+) (g m)
```

Without the interleaved representation, we would just get `L` for the
strictness demand on `g`. Now we are able to express that whenever
`g` is called, its second component is used strictly in denoting `g`
by `1C1(P(1P(U),SP(U)))`. This would allow Nested CPR to unbox the
division, for example.

Fixes #18903.
While fixing regressions, I also discovered and fixed #18957.

Metric Decrease:
    T13253-spj

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3a55b3a2 by Sebastian Graf at 2020-11-20T02:09:51-05:00
Update user's guide entry on demand analysis and worker/wrapper

The demand signature notation has been undocumented for a long time.
The only source to understand it, apart from reading the `Outputable`
instance, has been an outdated wiki page.

Since the previous commits have reworked the demand lattice, I took
it as an opportunity to also write some documentation about notation.

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fc963932 by Greg Steuck at 2020-11-20T02:10:31-05:00
Find hadrian location more reliably in cabal-install output

Fix #18944

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9f40cf6c by Ben Gamari at 2020-11-20T02:11:07-05:00
rts/linker: Align bssSize to page size when mapping symbol extras

We place symbol_extras right after bss. We also need
to ensure that symbol_extras can be mprotect'd independently from the
rest of the image. To ensure this we round up the size of bss to a page
boundary, thus ensuring that symbol_extras is also page-aligned.

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b739c319 by Ben Gamari at 2020-11-20T02:11:43-05:00
gitlab-ci: Add usage message to ci.sh

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802e9180 by Ben Gamari at 2020-11-20T02:11:43-05:00
gitlab-ci: Add VERBOSE environment variable

And change the make build system's default behavior to V=0, greatly
reducing build log sizes.

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fd944acd by Ben Gamari at 2020-11-20T02:42:33-05:00
users-guide: A bit of clean-up in profiling flag documentation

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04f339c4 by Ben Gamari at 2020-11-20T02:42:33-05:00
testsuite: Refactor CountParserDeps

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b432e24d by Ben Gamari at 2020-11-20T02:42:33-05:00
Introduce -fprof-callers flag

This introducing a new compiler flag to provide a convenient way to
introduce profiler cost-centers on all occurrences of the named
identifier.

Closes #18566.

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c62d03d0 by Ben Gamari at 2020-11-20T02:42:33-05:00
Bump time submodule to 1.11.1

Also bumps directory, Cabal, hpc, time, and unix submodules.

Closes #18847.

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753e50df by Sylvain Henry at 2020-11-20T02:42:38-05:00
Move Plugins into HscEnv (#17957)

Loaded plugins have nothing to do in DynFlags so this patch moves them
into HscEnv (session state).

"DynFlags plugins" become "Driver plugins" to still be able to register
static plugins.

Bump haddock submodule

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676df3e3 by Sylvain Henry at 2020-11-20T02:42:38-05:00
Don't initialize plugins in the Core2Core pipeline

Some plugins can be added via TH (cf addCorePlugin). Initialize them in
the driver instead of in the Core2Core pipeline.

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48348e9a by Ryan Scott at 2020-11-20T02:42:38-05:00
Add regression test for #10504

This issue was fixed at some point between GHC 8.0 and 8.2. Let's add a
regression test to ensure that it stays fixed.

Fixes #10504.

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fdeefbc2 by Ben Gamari at 2020-11-20T02:42:39-05:00
dwarf: Apply info table offset consistently

Previously we failed to apply the info table offset to the aranges and
DIEs, meaning that we often failed to unwind in gdb. For some reason
this only seemed to manifest in the RTS's Cmm closures. Nevertheless,
now we can unwind completely up to `main`

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3188122f by Ben Gamari at 2020-11-20T02:42:39-05:00
hadrian: Disable stripping when debug information is enabled

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30 changed files:

- .gitlab/ci.sh
- compiler/GHC.hs
- compiler/GHC/Builtin/primops.txt.pp
- compiler/GHC/CmmToAsm/Dwarf/Types.hs
- compiler/GHC/Core/Lint.hs
- + compiler/GHC/Core/Opt/CallerCC.hs
- + compiler/GHC/Core/Opt/CallerCC.hs-boot
- compiler/GHC/Core/Opt/CprAnal.hs
- compiler/GHC/Core/Opt/DmdAnal.hs
- compiler/GHC/Core/Opt/Monad.hs
- compiler/GHC/Core/Opt/Pipeline.hs
- compiler/GHC/Core/Opt/SetLevels.hs
- compiler/GHC/Core/Opt/Simplify.hs
- compiler/GHC/Core/Opt/Simplify/Utils.hs
- compiler/GHC/Core/Opt/SpecConstr.hs
- compiler/GHC/Core/Opt/WorkWrap/Utils.hs
- compiler/GHC/CoreToStg.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Driver/Env.hs
- compiler/GHC/Driver/Main.hs
- compiler/GHC/Driver/Monad.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Monad.hs
- compiler/GHC/Driver/Plugins.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/HsToCore.hs
- compiler/GHC/Iface/Load.hs
- compiler/GHC/Iface/Make.hs
- compiler/GHC/Iface/Recomp.hs
- compiler/GHC/Iface/Recomp/Flags.hs


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/841b0fdfaeab70319926ee743969d8a1e4d40d1e...3188122f6111c21151381f014837b5ea80eb5a5c

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/841b0fdfaeab70319926ee743969d8a1e4d40d1e...3188122f6111c21151381f014837b5ea80eb5a5c
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