- Jun 05, 2024
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This commit removes 32-bit darwin logic from the testsuite given it's no longer supported (#24921). Also contains more cleanup of obsolete i386 windows logic.
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- Jun 04, 2024
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Adds support for emitting the clz and rbit instructions, which are used by GHC.Prim.clz*#, GHC.Prim.ctz*# and GHC.Prim.bitReverse*#.
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This patch adjusts test cases to handle the stdcall removal: - Some stdcall usages are replaced with ccall since stdcall doesn't make sense anymore. - We also preserve some stdcall usages, and check in the expected warning messages to ensure GHC always warn about stdcall usages (-Wunsupported-calling-conventions) as expected. - Error code testsuite coverage is slightly improved, -Wunsupported-calling-conventions is now tested. - Obsolete code paths related to i386 windows are also removed.
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This commit introduces a new language extension, `-XOrPatterns`, as described in GHC Proposal 522. An or-pattern `pat1; ...; patk` succeeds iff one of the patterns `pat1`, ..., `patk` succeed, in this order. See also the summary `Note [Implmentation of OrPatterns]`. Co-Authored-By:Sebastian Graf <sgraf1337@gmail.com>
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- Jun 03, 2024
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For each module in a GHCi session, we keep alive one `ModLocation`. A `ModLocation` is fairly inefficiently packed, as `String`s are expensive in memory usage. While benchmarking the agda codebase, we concluded that we keep alive around 11MB of `FilePath`'s, solely retained by `ModLocation`. We provide a more densely packed encoding of `ModLocation`, by moving from `FilePath` to `OsPath`. Further, we migrate the full `Finder` component to `OsPath` to avoid unnecessary transformations. As the `Finder` component is well-encapsulated, this requires only a minimal amount of changes in other modules. We introduce pattern synonym for 'ModLocation' which maintains backwards compatibility and avoids breaking consumers of 'ModLocation'.
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Implements the algorithm from compiler-rt's udiv128by64to64default. This rewrite results in a roughly 24x improvement in runtime on AArch64 (and likely any other arch that uses it).
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- Jun 02, 2024
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Fixes #24839. Co-authored-by:Sylvain Henry <hsyl20@gmail.com>
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- Jun 01, 2024
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For whatever reason, the `Outputable` instance for `FixitySig` simply did not print out namespace specifiers, leading to the confusing `-ddump-splices` output seen in #24911. This patch corrects this oversight. Fixes #24911.
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- May 31, 2024
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Add hie.yaml to ghc-config project directory so it can be edited using HLS.
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Deriving `Typeable` does nothing, and it hasn't done for a long while. There has also been a warning for a long while which warns you about uselessly deriving it but it wasn't enabled in -Wall. Fixes #24784
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...so that they do not cause coerce to bypass the nominal role on the corresponding singleton types when they are imported. See Note [Preventing unsafe coercions for singleton types] and the discussion at #23478. This also introduces unsafeWithSNatCo (and analogues for Char and Symbol) so that users can still access the dangerous coercions that importing the real constructors would allow, but only in a very localized way.
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- May 30, 2024
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It can be the result of either a bang pattern or strict binding, so now we say so instead of claiming it must be a bang pattern. Fixes #21032
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This allows representing functions like: int foo(void); to be imported like this: foreign import ccall "a_number_c" c_number :: (# #) -> Int64# Which can be useful when the imported function isn't implicitly stateful.
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- May 28, 2024
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Teo Camarasu authoredNow that `template-haskell` is no longer wired-in. These tests are triggering #24886, and so need to be marked broken.
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Thus we make `template-haskell` reinstallable and keep it as the public API for Template Haskell. All of the wired-in identifiers are moved to `ghc-internal`. This necessitates also moving much of `ghc-boot-th` into `ghc-internal`. These modules are then re-exported from `ghc-boot-th` and `template-haskell`. To avoid a dependency on `template-haskell` from `lib:ghc`, we instead depend on the TH ASTs via `ghc-boot-th`. As `template-haskell` no longer has special status, we can drop the logic adding an implicit dependency on `template-haskell` when using TH. We can also drop the `template-haskell-next` package, which was previously used when bootstrapping. When bootstrapping, we need to vendor the TH AST modules from `ghc-internal` into `ghc-boot-th`. This is controlled by the `bootstrap` cabal flag as before. See Note [Bootstrapping Template Haskell]. We split out a GHC.Internal.TH.Lift module resolving #24752. This module is only built when not bootstrapping. Resolves #24703 ------------------------- Metric Increase: ghc_boot_th_dir ghc_boot_th_so -------------------------
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- May 24, 2024
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Test labels for binary interface file sizes are hard to read and overly verbose at the same time. Extend the name for the metric title, but shorten it in the actual comparison table.
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- May 23, 2024
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We need to ensure that the output of `cvtp` is parenthesized (at precedence `sigPrec`) so that any pattern signatures with a surrounding pattern signature can parse correctly. Fixes #24837.
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As #24810 showed, it is (a little) better to skolemise en-bloc, so that Note [Let-bound skolems] fires more often. See Note [Skolemisation en bloc] in GHC.Tc.Utils.Instantiate.
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The testsuite driver CPU feature detection logic only detects host CPU and only makes sense when we are not testing a cross GHC.
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T17920 was marked as fragile on wasm before; it can be trivially fixed by avoiding calling variadic printf() in cmm.
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- May 22, 2024
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- May 20, 2024
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This new performance test has the purpose of detecting regressions in complexity in relation to the number of modules in a project, so 1% deviation is way too small to avoid false positives.
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- May 19, 2024
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Serge S. Gulin authored
Added trivial size performance test which involves unicode general category usage via `read`. The `read` itself uses general category to detect spaces. The purpose for this test is to measure outcome of applying improvements at General Category representation in code discussed at #24789.
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- May 17, 2024
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Ticket #24806 showed that we also need to treat dead end thunks as tagged during the analysis.
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Closes #24759 Background. In MR !12372 we began tracking shared object files and directories sizes for dependencies. However, this broke release builds because release builds alter the filenames swapping "in-place" for a hash. This was not considered in the MR and thus broke release pipelines. Furthermore, the rts_so test was found to be wildly varying and was therefore disabled in !12561. This commit fixes both of these issues: - fix the rts_so test by making the regex less general, now the rts_so test and all other foo.so tests must match "libHS<some-lib>-<version>-<hash|'in-place>-<ghc>". This prevents the rts_so test from accidentally matching different rts variants such as rts_threaded, which was the cause of the wild swings after !12372. - add logic to match either a hash or the string in-place. This should make the find_so function build agnostic.
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Non-moving segments are 8 blocks long and need to be aligned. Previously we serviced allocations by grabbing 15 blocks, finding an aligned 8 block group in it and returning the rest. This proved to lead to high levels of fragmentation as a de-allocating a segment caused an 8 block gap to form, and this could not be reused for allocation. This patch introduces a segment allocator based around using entire megablocks to service segment allocations in bulk. When there are no free segments, we grab an entire megablock and fill it with aligned segments. As the megablock is free, we can easily guarantee alignment. Any unused segments are placed on a free list. It only makes sense to free segments in bulk when all of the segments in a megablock are freeable. After sweeping, we grab the free list, sort it, and find all groups of segments where they cover the megablock and free them. This introduces a period of time when free segments are not available to the mutator, but the risk that this would lead to excessive allocation is low. Right after sweep, we should have an abundance of partially full segments, and this pruning step is relatively quick. In implementing this we drop the logic that kept NONMOVING_MAX_FREE segments on the free list. We also introduce an eventlog event to log the amount of pruned/retained free segments. See Note [Segment allocation strategy] Resolves #24150 ------------------------- Metric Decrease: T13253 T19695 -------------------------
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- May 16, 2024
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This generalises the HasField class to support representation polymorphism, so that instead of type HasField :: forall {k} . k -> Type -> Type -> Constraint we have type HasField :: forall {k} {r_rep} {a_rep} . k -> TYPE r_rep -> TYPE a_rep -> Constraint -
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- When suggesting Language extensions, also suggest Extensions which imply them - Suggest ExplicitForAll and GADTSyntax instead of more specific extensions - Rephrase suggestion to include the term 'Extension' - Also moves some flag specific definitions out of Session.hs into Flags.hs (#24478) Fixes: #24477 Fixes: #24448 Fixes: #10893
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- May 15, 2024
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Add regression tests to track how `-fwrite-if-compression` levels affect the size of `.hi` files.
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Fixes #24808
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