[Git][ghc/ghc][wip/timings-allocations] 55 commits: testsuite: Add testcase for #18733
Ben Gamari
gitlab at gitlab.haskell.org
Fri Nov 27 22:32:20 UTC 2020
Ben Gamari pushed to branch wip/timings-allocations at Glasgow Haskell Compiler / GHC
Commits:
787e93ae by Ben Gamari at 2020-11-11T23:14:11-05:00
testsuite: Add testcase for #18733
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5353fd50 by Ben Gamari at 2020-11-12T10:05:30-05:00
compiler: Fix recompilation checking
In ticket #18733 we noticed a rather serious deficiency in the current
fingerprinting logic for recursive groups. I have described the old
fingerprinting story and its problems in Note [Fingerprinting recursive
groups] and have reworked the story accordingly to avoid these issues.
Fixes #18733.
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63fa3997 by Sebastian Graf at 2020-11-13T14:29:39-05:00
Arity: Rework `ArityType` to fix monotonicity (#18870)
As we found out in #18870, `andArityType` is not monotone, with
potentially severe consequences for termination of fixed-point
iteration. That showed in an abundance of "Exciting arity" DEBUG
messages that are emitted whenever we do more than one step in
fixed-point iteration.
The solution necessitates also recording `OneShotInfo` info for
`ABot` arity type. Thus we get the following definition for `ArityType`:
```
data ArityType = AT [OneShotInfo] Divergence
```
The majority of changes in this patch are the result of refactoring use
sites of `ArityType` to match the new definition.
The regression test `T18870` asserts that we indeed don't emit any DEBUG
output anymore for a function where we previously would have.
Similarly, there's a regression test `T18937` for #18937, which we
expect to be broken for now.
Fixes #18870.
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197d59fa by Sebastian Graf at 2020-11-13T14:29:39-05:00
Arity: Emit "Exciting arity" warning only after second iteration (#18937)
See Note [Exciting arity] why we emit the warning at all and why we only
do after the second iteration now.
Fixes #18937.
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de7ec9dd by David Eichmann at 2020-11-13T14:30:16-05:00
Add rts_listThreads and rts_listMiscRoots to RtsAPI.h
These are used to find the current roots of the garbage collector.
Co-authored-by: Sven Tennie's avatarSven Tennie <sven.tennie at gmail.com>
Co-authored-by: Matthew Pickering's avatarMatthew Pickering <matthewtpickering at gmail.com>
Co-authored-by: default avatarBen Gamari <bgamari.foss at gmail.com>
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24a86f09 by Ben Gamari at 2020-11-13T14:30:51-05:00
gitlab-ci: Cache cabal store in linting job
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0a7e592c by Ben Gamari at 2020-11-15T03:35:45-05:00
nativeGen/dwarf: Fix procedure end addresses
Previously the `.debug_aranges` and `.debug_info` (DIE) DWARF
information would claim that procedures (represented with a
`DW_TAG_subprogram` DIE) would only span the range covered by their entry
block. This omitted all of the continuation blocks (represented by
`DW_TAG_lexical_block` DIEs), confusing `perf`. Fix this by introducing
a end-of-procedure label and using this as the `DW_AT_high_pc` of
procedure `DW_TAG_subprogram` DIEs
Fixes #17605.
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1e19183d by Ben Gamari at 2020-11-15T03:35:45-05:00
nativeGen/dwarf: Only produce DW_AT_source_note DIEs in -g3
Standard debugging tools don't know how to understand these so let's not
produce them unless asked.
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ad73370f by Ben Gamari at 2020-11-15T03:35:45-05:00
nativeGen/dwarf: Use DW_AT_linkage instead of DW_AT_MIPS_linkage
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a2539650 by Ben Gamari at 2020-11-15T03:35:45-05:00
gitlab-ci: Add DWARF release jobs for Debian 10, Fedora27
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d61adb3d by Ryan Scott at 2020-11-15T03:36:21-05:00
Name (tc)SplitForAll- functions more consistently
There is a zoo of `splitForAll-` functions in `GHC.Core.Type` (as well as
`tcSplitForAll-` functions in `GHC.Tc.Utils.TcType`) that all do very similar
things, but vary in the particular form of type variable that they return. To
make things worse, the names of these functions are often quite misleading.
Some particularly egregious examples:
* `splitForAllTys` returns `TyCoVar`s, but `splitSomeForAllTys` returns
`VarBndr`s.
* `splitSomeForAllTys` returns `VarBndr`s, but `tcSplitSomeForAllTys` returns
`TyVar`s.
* `splitForAllTys` returns `TyCoVar`s, but `splitForAllTysInvis` returns
`InvisTVBinder`s. (This in particular arose in the context of #18939, and
this finally motivated me to bite the bullet and improve the status quo
vis-à-vis how we name these functions.)
In an attempt to bring some sanity to how these functions are named, I have
opted to rename most of these functions en masse to use consistent suffixes
that describe the particular form of type variable that each function returns.
In concrete terms, this amounts to:
* Functions that return a `TyVar` now use the suffix `-TyVar`.
This caused the following functions to be renamed:
* `splitTyVarForAllTys` -> `splitForAllTyVars`
* `splitForAllTy_ty_maybe` -> `splitForAllTyVar_maybe`
* `tcSplitForAllTys` -> `tcSplitForAllTyVars`
* `tcSplitSomeForAllTys` -> `tcSplitSomeForAllTyVars`
* Functions that return a `CoVar` now use the suffix `-CoVar`.
This caused the following functions to be renamed:
* `splitForAllTy_co_maybe` -> `splitForAllCoVar_maybe`
* Functions that return a `TyCoVar` now use the suffix `-TyCoVar`.
This caused the following functions to be renamed:
* `splitForAllTy` -> `splitForAllTyCoVar`
* `splitForAllTys` -> `splitForAllTyCoVars`
* `splitForAllTys'` -> `splitForAllTyCoVars'`
* `splitForAllTy_maybe` -> `splitForAllTyCoVar_maybe`
* Functions that return a `VarBndr` now use the suffix corresponding to the
most relevant type synonym. This caused the following functions to be renamed:
* `splitForAllVarBndrs` -> `splitForAllTyCoVarBinders`
* `splitForAllTysInvis` -> `splitForAllInvisTVBinders`
* `splitForAllTysReq` -> `splitForAllReqTVBinders`
* `splitSomeForAllTys` -> `splitSomeForAllTyCoVarBndrs`
* `tcSplitForAllVarBndrs` -> `tcSplitForAllTyVarBinders`
* `tcSplitForAllTysInvis` -> `tcSplitForAllInvisTVBinders`
* `tcSplitForAllTysReq` -> `tcSplitForAllReqTVBinders`
* `tcSplitForAllTy_maybe` -> `tcSplitForAllTyVarBinder_maybe`
Note that I left the following functions alone:
* Functions that split apart things besides `ForAllTy`s, such as `splitFunTys`
or `splitPiTys`. Thankfully, there are far fewer of these functions than
there are functions that split apart `ForAllTy`s, so there isn't much of a
pressing need to apply the new naming convention elsewhere.
* Functions that split apart `ForAllCo`s in `Coercion`s, such as
`GHC.Core.Coercion.splitForAllCo_maybe`. We could theoretically apply the new
naming convention here, but then we'd have to figure out how to disambiguate
`Type`-splitting functions from `Coercion`-splitting functions. Ultimately,
the `Coercion`-splitting functions aren't used nearly as much as the
`Type`-splitting functions, so I decided to leave the former alone.
This is purely refactoring and should cause no change in behavior.
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645444af by Ryan Scott at 2020-11-15T03:36:21-05:00
Use tcSplitForAllInvisTyVars (not tcSplitForAllTyVars) in more places
The use of `tcSplitForAllTyVars` in `tcDataFamInstHeader` was the immediate
cause of #18939, and replacing it with a new `tcSplitForAllInvisTyVars`
function (which behaves like `tcSplitForAllTyVars` but only splits invisible
type variables) fixes the issue. However, this led me to realize that _most_
uses of `tcSplitForAllTyVars` in GHC really ought to be
`tcSplitForAllInvisTyVars` instead. While I was in town, I opted to replace
most uses of `tcSplitForAllTys` with `tcSplitForAllTysInvis` to reduce the
likelihood of such bugs in the future.
I say "most uses" above since there is one notable place where we _do_ want
to use `tcSplitForAllTyVars`: in `GHC.Tc.Validity.forAllTyErr`, which produces
the "`Illegal polymorphic type`" error message if you try to use a higher-rank
`forall` without having `RankNTypes` enabled. Here, we really do want to split
all `forall`s, not just invisible ones, or we run the risk of giving an
inaccurate error message in the newly added `T18939_Fail` test case.
I debated at some length whether I wanted to name the new function
`tcSplitForAllInvisTyVars` or `tcSplitForAllTyVarsInvisible`, but in the end,
I decided that I liked the former better. For consistency's sake, I opted to
rename the existing `splitPiTysInvisible` and `splitPiTysInvisibleN` functions
to `splitInvisPiTys` and `splitPiTysInvisN`, respectively, so that they use the
same naming convention. As a consequence, this ended up requiring a `haddock`
submodule bump.
Fixes #18939.
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8887102f by Moritz Angermann at 2020-11-15T03:36:56-05:00
AArch64/arm64 adjustments
This addes the necessary logic to support aarch64 on elf, as well
as aarch64 on mach-o, which Apple calls arm64.
We change architecture name to AArch64, which is the official arm
naming scheme.
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fc644b1a by Ben Gamari at 2020-11-15T03:37:31-05:00
ghc-bin: Build with eventlogging by default
We now have all sorts of great facilities using the
eventlog which were previously unavailable without
building a custom GHC. Fix this by linking with
`-eventlog` by default.
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52114fa0 by Sylvain Henry at 2020-11-16T11:48:47+01:00
Add Addr# atomic primops (#17751)
This reuses the codegen used for ByteArray#'s atomic primops.
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8150f654 by Sebastian Graf at 2020-11-18T23:38:40-05:00
PmCheck: Print types of uncovered patterns (#18932)
In order to avoid confusion as in #18932, we display the type of the
match variables in the non-exhaustiveness warning, e.g.
```
T18932.hs:14:1: warning: [-Wincomplete-patterns]
Pattern match(es) are non-exhaustive
In an equation for ‘g’:
Patterns of type ‘T a’, ‘T a’, ‘T a’ not matched:
(MkT2 _) (MkT1 _) (MkT1 _)
(MkT2 _) (MkT1 _) (MkT2 _)
(MkT2 _) (MkT2 _) (MkT1 _)
(MkT2 _) (MkT2 _) (MkT2 _)
...
|
14 | g (MkT1 x) (MkT1 _) (MkT1 _) = x
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
```
It also allows us to omit the type signature on wildcard matches which
we previously showed in only some situations, particularly
`-XEmptyCase`.
Fixes #18932.
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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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2a8a979c by Ben Gamari at 2020-11-21T01:13:26-05:00
users-guide: A bit of clean-up in profiling flag documentation
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56804e33 by Ben Gamari at 2020-11-21T01:13:26-05:00
testsuite: Refactor CountParserDeps
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53ad67ea by Ben Gamari at 2020-11-21T01:13:26-05:00
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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ecfd0278 by Sylvain Henry at 2020-11-21T01:14:09-05:00
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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72f2257c by Sylvain Henry at 2020-11-21T01:14:09-05:00
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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ddbeeb3c by Ryan Scott at 2020-11-21T01:14:44-05:00
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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a4a6dc2a by Ben Gamari at 2020-11-21T01:15:21-05:00
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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69bfbc21 by Ben Gamari at 2020-11-21T01:15:56-05:00
hadrian: Disable stripping when debug information is enabled
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7e93ae8b by Ben Gamari at 2020-11-21T13:13:29-05:00
rts: Post ticky entry counts to the eventlog
We currently only post the entry counters, not the other global
counters as in my experience the former are more useful. We use the heap
profiler's census period to decide when to dump.
Also spruces up the documentation surrounding ticky-ticky a bit.
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bc9c3916 by Ben Gamari at 2020-11-22T06:28:10-05:00
Implement -ddump-c-backend argument
To dump output of the C backend.
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901bc220 by Ben Gamari at 2020-11-22T12:39:02-05:00
Bump time submodule to 1.11.1
Also bumps directory, Cabal, hpc, time, and unix submodules.
Closes #18847.
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92c0afbf by Ben Gamari at 2020-11-22T12:39:38-05:00
hadrian: Dump STG when ticky is enabled
This changes the "ticky" modifier to enable dumping of final STG as this
is generally needed to make sense of the ticky profiles.
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d23fef68 by Ben Gamari at 2020-11-22T12:39:38-05:00
hadrian: Introduce notion of flavour transformers
This extends Hadrian's notion of "flavour", as described in #18942.
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179d0bec by Ben Gamari at 2020-11-22T12:39:38-05:00
hadrian: Add a viaLlvmBackend modifier
Note that this also slightly changes the semantics of these flavours as
we only use LLVM for >= stage1 builds.
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d4d95e51 by Ben Gamari at 2020-11-22T12:39:38-05:00
hadrian: Add profiled_ghc and no_dynamic_ghc modifiers
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6815603f by Ben Gamari at 2020-11-22T12:39:38-05:00
hadrian: Drop redundant flavour definitions
Drop the profiled, LLVM, and ThreadSanitizer flavour definitions as
these can now be realized with flavour transformers.
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f88f4339 by Ben Gamari at 2020-11-24T02:43:20-05:00
rts: Flush eventlog buffers from flushEventLog
As noted in #18043, flushTrace failed flush anything beyond the writer.
This means that a significant amount of data sitting in capability-local
event buffers may never get flushed, despite the users' pleads for us to
flush.
Fix this by making flushEventLog flush all of the event buffers before
flushing the writer.
Fixes #18043.
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7c03cc50 by Ben Gamari at 2020-11-24T02:43:55-05:00
gitlab-ci: Run LLVM job on appropriately-labelled MRs
Namely, those marked with the ~"LLVM backend" label
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9b95d815 by Ben Gamari at 2020-11-24T02:43:55-05:00
gitlab-ci: Run LLVM builds on Debian 10
The current Debian 9 image doesn't provide LLVM 7.
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2ed3e6c0 by Ben Gamari at 2020-11-24T02:43:55-05:00
CmmToLlvm: Declare signature for memcmp
Otherwise `opt` fails with:
error: use of undefined value '@memcmp$def'
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be5d74ca by Moritz Angermann at 2020-11-26T16:00:32-05:00
[Sized Cmm] properly retain sizes.
This replaces all Word<N> = W<N># Word# and Int<N> = I<N># Int# with
Word<N> = W<N># Word<N># and Int<N> = I<N># Int<N>#, thus providing us
with properly sized primitives in the codegenerator instead of pretending
they are all full machine words.
This came up when implementing darwinpcs for arm64. The darwinpcs reqires
us to pack function argugments in excess of registers on the stack. While
most procedure call standards (pcs) assume arguments are just passed in
8 byte slots; and thus the caller does not know the exact signature to make
the call, darwinpcs requires us to adhere to the prototype, and thus have
the correct sizes. If we specify CInt in the FFI call, it should correspond
to the C int, and not just be Word sized, when it's only half the size.
This does change the expected output of T16402 but the new result is no
less correct as it eliminates the narrowing (instead of the `and` as was
previously done).
Bumps the array, bytestring, text, and binary submodules.
Co-Authored-By: Ben Gamari <ben at well-typed.com>
Metric Increase:
T13701
T14697
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a84e53f9 by Andreas Klebinger at 2020-11-26T16:00:32-05:00
RTS: Fix failed inlining of copy_tag.
On windows using gcc-10 gcc failed to inline copy_tag into evacuate.
To fix this we now set the always_inline attribute for the various
copy* functions in Evac.c. The main motivation here is not the
overhead of the function call, but rather that this allows the code
to "specialize" for the size of the closure we copy which is often
known at compile time.
An earlier commit also tried to avoid evacuate_large inlining. But
didn't quite succeed. So I also marked evacuate_large as noinline.
Fixes #12416
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cdbd16f5 by Sylvain Henry at 2020-11-26T16:00:33-05:00
Fix toArgRep to support 64-bit reps on all systems
[This is @Ericson2314 writing a commit message for @hsyl20's patch.]
(Progress towards #11953, #17377, #17375)
`Int64Rep` and `Word64Rep` are currently broken on 64-bit systems. This
is because they should use "native arg rep" but instead use "large arg
rep" as they do on 32-bit systems, which is either a non-concept or a
128-bit rep depending on one's vantage point.
Now, these reps currently aren't used during 64-bit compilation, so the
brokenness isn't observed, but I don't think that constitutes reasons
not to fix it. Firstly, the linked issues there is a clearly expressed
desire to use explicit-bitwidth constructs in more places. Secondly, per
[1], there are other bugs that *do* manifest from not threading
explicit-bitwidth information all the way through the compilation
pipeline. One can therefore view this as one piece of the larger effort
to do that, improve ergnomics, and squash remaining bugs.
Also, this is needed for !3658. I could just merge this as part of that,
but I'm keen on merging fixes "as they are ready" so the fixes that
aren't ready are isolated and easier to debug.
[1]: https://mail.haskell.org/pipermail/ghc-devs/2020-October/019332.html
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a9378e69 by Tim Barnes at 2020-11-26T16:00:34-05:00
Set dynamic users-guide TOC spacing (fixes #18554)
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86a59d93 by Ben Gamari at 2020-11-26T16:00:34-05:00
rts: Use RTS_LIKELY in CHECK
Most compilers probably already infer that
`barf` diverges but it nevertheless doesn't
hurt to be explicit.
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5757e82b by Matthew Pickering at 2020-11-26T16:00:35-05:00
Remove special case for GHC.ByteCode.Instr
This was added in
https://github.com/nomeata/ghc-heap-view/commit/34935206e51b9c86902481d84d2f368a6fd93423
GHC.ByteCode.Instr.BreakInfo no longer exists so the special case is dead code.
Any check like this can be easily dealt with in client code.
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d9c8b5b4 by Matthew Pickering at 2020-11-26T16:00:35-05:00
Split Up getClosureDataFromHeapRep
Motivation
1. Don't enforce the repeated decoding of an info table, when the client
can cache it (ghc-debug)
2. Allow the constructor information decoding to be overridden, this
casues segfaults in ghc-debug
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3e3555cc by Andreas Klebinger at 2020-11-26T16:00:35-05:00
RegAlloc: Add missing raPlatformfield to RegAllocStatsSpill
Fixes #18994
Co-Author: Benjamin Maurer <maurer.benjamin at gmail.com>
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a1a75aa9 by Ben Gamari at 2020-11-27T06:20:41-05:00
rts: Allocate MBlocks with MAP_TOP_DOWN on Windows
As noted in #18991, we would previously allocate heap in low memory.
Due to this the linker, which typically *needs* low memory, would end up
competing with the heap. In longer builds we end up running out of
low memory entirely, leading to linking failures.
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383155a2 by Ben Gamari at 2020-11-27T17:32:17-05:00
withTimings: Emit allocations counter
This will allow us to back out the allocations per compiler pass from
the eventlog. Note that we dump the allocation counter rather than the
difference since this will allow us to determine how much work is done
*between* `withTiming` blocks.
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30 changed files:
- .gitlab-ci.yml
- .gitlab/ci.sh
- aclocal.m4
- compiler/GHC.hs
- compiler/GHC/Builtin/Names.hs
- compiler/GHC/Builtin/Types.hs
- compiler/GHC/Builtin/primops.txt.pp
- compiler/GHC/ByteCode/Asm.hs
- compiler/GHC/Cmm.hs
- compiler/GHC/Cmm/CLabel.hs
- compiler/GHC/Cmm/Expr.hs
- compiler/GHC/CmmToAsm.hs
- compiler/GHC/CmmToAsm/Config.hs
- compiler/GHC/CmmToAsm/Dwarf.hs
- compiler/GHC/CmmToAsm/Dwarf/Constants.hs
- compiler/GHC/CmmToAsm/Dwarf/Types.hs
- compiler/GHC/CmmToAsm/Ppr.hs
- compiler/GHC/CmmToAsm/Reg/Graph.hs
- compiler/GHC/CmmToAsm/Reg/Graph/Stats.hs
- compiler/GHC/CmmToAsm/Reg/Graph/TrivColorable.hs
- compiler/GHC/CmmToAsm/Reg/Linear.hs
- compiler/GHC/CmmToAsm/Reg/Linear/FreeRegs.hs
- compiler/GHC/CmmToAsm/Reg/Target.hs
- compiler/GHC/CmmToAsm/X86/CodeGen.hs
- compiler/GHC/CmmToAsm/X86/Ppr.hs
- compiler/GHC/CmmToC.hs
- compiler/GHC/CmmToLlvm/Base.hs
- compiler/GHC/Core.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/Coercion/Opt.hs
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/c5f7e3700ea6e2c310d6bf35956df2d815f31c6e...383155a2f7c28c7722f9d1574130c60cac709a3a
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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/c5f7e3700ea6e2c310d6bf35956df2d815f31c6e...383155a2f7c28c7722f9d1574130c60cac709a3a
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