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* gitlab-ci: Do full `perf` build when building Windows releaseswip/windows-release-profilingBen Gamari2019-03-081-1/+10
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* Fix #16391 by using occCheckExpand in TcValidityRyan Scott2019-03-0712-34/+131
| | | | | | | | | | | | | The type-variables-escaping-their-scope-via-kinds check in `TcValidity` was failing to properly expand type synonyms, which led to #16391. This is easily fixed by using `occCheckExpand` before performing the validity check. Along the way, I refactored this check out into its own function, and sprinkled references to Notes to better explain all of the moving parts. Many thanks to @simonpj for the suggestions. Bumps the haddock submodule.
* Fix #16392: revertCAFs in external interpreter when necessaryPhuong Trinh2019-03-078-4/+35
| | | | | | | | | We revert CAFs when loading/adding modules in ghci (presumably to refresh execution states and to allow for object code to be unloaded from the runtime). However, with `-fexternal-interpreter` enabled, we are only doing it in the ghci process instead of the external interpreter process where the cafs are allocated and computed. This makes sure that revertCAFs is done in the appropriate process no matter if that flag is present or not.
* Test Trac #16263Simon Peyton Jones2019-03-063-0/+10
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* Add tests for Trac #16221 and #16342Simon Peyton Jones2019-03-065-0/+42
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* gitlab-ci: Don't allow i386-deb9 to failBen Gamari2019-03-061-1/+0
| | | | | | | | | Also account for testsuite metric drift. Metric Increase: haddock.Cabal haddock.base T14683
* testsuite: Use fragile modifier for more testsBen Gamari2019-03-065-18/+9
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* testsuite: Mark heapprof001 as fragile on i386Ben Gamari2019-03-061-1/+1
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* testsuite: Introduce fragile modifierBen Gamari2019-03-061-0/+24
| | | | | | | | | | Now since we have been a bit more stringent in testsuite cleanliness we have been marking a lot of tests as fragile using the `skip` modifier. However, this unfortunately means that we lose the association with the ticket number documenting the fragility. Here we introduce `fragile` and `fragile_for` to retain this information.
* Move reifyGHCi function into GhciMonad type classZejun Wu2019-03-061-13/+3
| | | | This was the suggested change in !176 but missed the batch merge (!263).
* Fix #16385 by appending _maybe to a use of lookupGlobalOccRyan Scott2019-03-064-8/+38
| | | | | | | | | `instance forall c. c` claimed that `c` was out of scope because the renamer was invoking `lookupGlobalOcc` on `c` (in `RnNames.getLocalNonValBinders`) without binding `c` first. To avoid this, this patch changes GHC to invoke `lookupGlobalOcc_maybe` on `c` instead, and if that returns `Nothing`, then bail out, resulting in a better error message.
* Fix itBen Gamari2019-03-063-6/+10
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* rts: Unglobalize dead_weak_ptr_list and resurrected_threadsÖmer Sinan Ağacan2019-03-065-24/+23
| | | | | | | | In the concurrent nonmoving collector we will need the ability to call `traverseWeakPtrList` concurrently with minor generation collections. This global state stands in the way of this. However, refactoring it away is straightforward since this list only persists the length of a single GC.
* Handle absolute paths to build roots in Hadrian.P.C. Shyamshankar2019-03-066-10/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes #16187. This patch fixes various path concatenation issues to allow functioning builds with hadrian when the build root location is specified with an absolute path. Remarks: - The path concatenation operator (-/-) now handles absolute second operands appropriately. Its behavior should match that of POSIX (</>) in this regard. - The `getDirectoryFiles*` family of functions only searches for matches under the directory tree rooted by its first argument; all of the results are also relative to this root. If the first argument is the empty string, the current working directory is used. This patch passes the appropriate directory (almost always either `top` or `root`), and subsequently attaches that directory prefix so that the paths refer to the appropriate files. - Windows `tar` does not like colons (':') in paths to archive files, it tries to resolve them as remote paths. The `--force-local` option remedies this, and is applied on windows builds.
* Add regression test for #15918Ryan Scott2019-03-053-0/+27
| | | | | | | | The test case in #15918 no longer triggers an `ASSERT` failure on GHC HEAD, likely due to commit 682783828275cca5fd8bf5be5b52054c75e0e22c (`Make a smart mkAppTyM`). This patch adds a regression test for #15918 to finally put it to rest.
* rts/Printer: Print forwarding pointersÖmer Sinan Ağacan2019-03-051-3/+8
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* rts/Printer: Introduce a few more printing utilitiesÖmer Sinan Ağacan2019-03-052-0/+74
| | | | | These include printLargeAndPinnedObjects, printWeakLists, and printStaticObjects. These are generally useful things to have.
* Rip out object splittingBen Gamari2019-03-0572-989/+79
| | | | | | | | | | | | | | | The splitter is an evil Perl script that processes assembler code. Its job can be done better by the linker's --gc-sections flag. GHC passes this flag to the linker whenever -split-sections is passed on the command line. This is based on @DemiMarie's D2768. Fixes Trac #11315 Fixes Trac #9832 Fixes Trac #8964 Fixes Trac #8685 Fixes Trac #8629
* Fix map/coerce rule for newtypes with wrappersKrzysztof Gogolewski2019-03-056-29/+51
| | | | | | | | This addresses Trac #16208 by marking newtype wrapper unfoldings as compulsory. Furthermore, we can remove the special case for newtypes in exprIsConApp_maybe (introduced in 7833cf407d1f).
* Test Runner: don't show missing baseline warning for performance tests with ↵David Eichmann2019-03-051-15/+18
| | | | | | expected changes on the current commit. Trac #16359
* Be more careful when naming TyCon bindersSimon Peyton Jones2019-03-0513-368/+607
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes two rather gnarly test cases: * Trac #16342 (mutual recursion) See Note [Tricky scoping in generaliseTcTyCon] * Trac #16221 (shadowing) See Note [Unification variables need fresh Names] The main changes are: * Substantial reworking of TcTyClsDecls.generaliseTcTyCon This is the big change, and involves the rather tricky function TcHsSyn.zonkRecTyVarBndrs. See Note [Inferring kinds for type declarations] and Note [Tricky scoping in generaliseTcTyCon] for the details. * bindExplicitTKBndrs_Tv and bindImplicitTKBndrs_Tv both now allocate /freshly-named/ unification variables. Indeed, more generally, unification variables are always fresh; see Note [Unification variables need fresh Names] in TcMType * Clarify the role of tcTyConScopedTyVars. See Note [Scoped tyvars in a TcTyCon] in TyCon As usual, this dragged in some more refactoring: * Renamed TcMType.zonkTyCoVarBndr to zonkAndSkolemise * I renamed checkValidTelescope to checkTyConTelescope; it's only used on TyCons, and indeed takes a TyCon as argument. * I folded the slightly-mysterious reportFloatingKvs into checkTyConTelescope. (Previously all its calls immediately followed a call to checkTyConTelescope.) It makes much more sense there. * I inlined some called-once functions to simplify checkValidTyFamEqn. It's less spaghetti-like now. * This patch also fixes Trac #16251. I'm not quite sure why #16251 went wrong in the first place, nor how this patch fixes it, but hey, it's good, and life is short.
* Revert "compiler: Write .o files atomically. See #14533"Ben Gamari2019-03-041-6/+1
| | | | This reverts commit 0e2d300a59b1b5c167d2e7d99a448c8663ba6d7d.
* Revert "compiler: Refactor: extract `withAtomicRename`"Ben Gamari2019-03-042-29/+8
| | | | This reverts commit e8a08f400744a860d1366c6680c8419d30f7cc2a.
* Hadrian: track mingw, ship it in bindists, more robust install scriptAlp Mestanogullari2019-03-046-29/+84
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* Don't leave .hi files after running Haddock testsAlec Theriault2019-03-041-0/+4
| | | | | | RyanGlScott observed in https://github.com/haskell/haddock/issues/1030 that running Haddock tests in GHC's testsuite left some `.hi` files around in `utils/haddock`. This should fix that problem.
* detect 'autoreconf' path during configure, and use it in hadrianAlp Mestanogullari2019-03-033-2/+17
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* gitlab-ci: A bit of reorganizationBen Gamari2019-03-021-78/+84
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* gitlab-ci: Give deb9-unreg job a distinct cache keyBen Gamari2019-03-011-1/+1
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* testsuite: Suppress ticks when comparing -ddump-simpl outputBen Gamari2019-03-013-26/+26
| | | | | Otherwise these tests break spuriously when core libraries are compiled with source notes.
* gitlab-ci: Produce DWARF-enabled binary distributionBen Gamari2019-03-012-1/+30
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* Drop Docker imagesBen Gamari2019-03-0111-545/+0
| | | | These have been moved to the ghc/ci-images project.
* gitlab-ci: Pull docker images from ghc/ci-images registryBen Gamari2019-03-011-12/+14
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* Fix parsing of expected performance changes for tests with non-alpha characters.David Eichmann2019-03-011-1/+1
| | | | Python's split() function is used to split on all white space.
* use --docs=no-sphinx in both Hadrian CI jobsAlp Mestanogullari2019-03-011-1/+2
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* Hadrian: introduce ways to skip some documentation targetsAlp Mestanogullari2019-03-016-9/+159
| | | | | | | | | The initial motivation for this is to have a chance to run the binary distribution rules in our Windows CI without having to install sphinx-build and xelatex there, while retaining the ability to generate haddocks. I just ended up extending this idea a little bit so as to have control over whether we build haddocks, (sphinx) HTML manuals, (sphinx) PDF manuals and (sphinx) manpages.
* Lexer: turn some fatal errors into non-fatal onesAlec Theriault2019-03-014-21/+42
| | | | | | | | | | The following previously fatal lexer errors are now non-fatal: * errors about enabling `LambdaCase` * errors about enabling `NumericUnderscores` * errors about having valid characters in primitive strings See #16270
* Visible dependent quantificationRyan Scott2019-03-0164-148/+813
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This implements GHC proposal 35 (https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0035-forall-arrow.rst) by adding the ability to write kinds with visible dependent quantification (VDQ). Most of the work for supporting VDQ was actually done _before_ this patch. That is, GHC has been able to reason about kinds with VDQ for some time, but it lacked the ability to let programmers directly write these kinds in the source syntax. This patch is primarly about exposing this ability, by: * Changing `HsForAllTy` to add an additional field of type `ForallVisFlag` to distinguish between invisible `forall`s (i.e, with dots) and visible `forall`s (i.e., with arrows) * Changing `Parser.y` accordingly The rest of the patch mostly concerns adding validity checking to ensure that VDQ is never used in the type of a term (as permitting this would require full-spectrum dependent types). This is accomplished by: * Adding a `vdqAllowed` predicate to `TcValidity`. * Introducing `splitLHsSigmaTyInvis`, a variant of `splitLHsSigmaTy` that only splits invisible `forall`s. This function is used in certain places (e.g., in instance declarations) to ensure that GHC doesn't try to split visible `forall`s (e.g., if it tried splitting `instance forall a -> Show (Blah a)`, then GHC would mistakenly allow that declaration!) This also updates Template Haskell by introducing a new `ForallVisT` constructor to `Type`. Fixes #16326. Also fixes #15658 by documenting this feature in the users' guide.
* Cleanup iserv/iserv-proxyMoritz Angermann2019-02-2825-37/+415
| | | | | | | | | | | | This adds trace messages that include the processes name and as such make debugging and following the communication easier. It also adds a note regarding the fwd*Call proxy-communication logic between the proxy and the slave. The proxy will now also poll for 60s to wait for the remote iserv to come up. (Alternatively you can start the remote process beforehand; and just have iserv-proxy connect to it)
* Fix intermittent hie002 failureVladislav Zavialov2019-02-271-1/+2
| | | | | | | | | | | | | | | | | | | | | | hie002 is a performance test that used to fail unpredictably: max_bytes_used Decrease from x86_64-linux-deb9-debug baseline @ HEAD~2: Expected hie002 (normal) max_bytes_used: 1190923992.0 +/-20% Lower bound hie002 (normal) max_bytes_used: 952739193 Upper bound hie002 (normal) max_bytes_used: 1429108791 Actual hie002 (normal) max_bytes_used: 726270784 Deviation hie002 (normal) max_bytes_used: -39.0 % peak_megabytes_allocated Decrease from x86_64-linux-deb9-debug baseline @ HEAD~2: Expected hie002 (normal) peak_megabytes_allocated: 2538.0 +/-20% Lower bound hie002 (normal) peak_megabytes_allocated: 2030 Upper bound hie002 (normal) peak_megabytes_allocated: 3046 Actual hie002 (normal) peak_megabytes_allocated: 1587 Deviation hie002 (normal) peak_megabytes_allocated: -37.5 % *** unexpected stat test failure for hie002(normal) 'max_bytes_used' and 'peak_megabytes_allocated' are too unstable without careful control of the runtime configuration. We fix this by using a more predictable metric, 'bytes allocated'.
* RTS: Add missing memory barrierPeter Trommler2019-02-272-6/+12
| | | | | | | | | | | | | In the work stealing queue a load-load-barrier is required to ensure that a read of queue data cannot be reordered before a read of the bottom pointer into the queue. The added load-load-barrier ensures that the ordering of writes enforced at the end of `pushWSDeque` is also respected in the order of reads in `stealWSDeque_`. In other words, when reading `q->bottom` we want to make sure that we see the updates to `q->elements`. Fixes #13633
* Treat kind/type variables identically, demolish FKTVVladislav Zavialov2019-02-2759-682/+400
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implements GHC Proposal #24: .../ghc-proposals/blob/master/proposals/0024-no-kind-vars.rst Fixes Trac #16334, Trac #16315 With this patch, scoping rules for type and kind variables have been unified: kind variables no longer receieve special treatment. This simplifies both the language and the implementation. User-facing changes ------------------- * Kind variables are no longer implicitly quantified when an explicit forall is used: p :: Proxy (a :: k) -- still accepted p :: forall k a. Proxy (a :: k) -- still accepted p :: forall a. Proxy (a :: k) -- no longer accepted In other words, now we adhere to the "forall-or-nothing" rule more strictly. Related function: RnTypes.rnImplicitBndrs * The -Wimplicit-kind-vars warning has been deprecated. * Kind variables are no longer implicitly quantified in constructor declarations: data T a = T1 (S (a :: k) | forall (b::k). T2 (S b) -- no longer accepted data T (a :: k) = T1 (S (a :: k) | forall (b::k). T2 (S b) -- still accepted Related function: RnTypes.extractRdrKindSigVars * Implicitly quantified kind variables are no longer put in front of other variables: f :: Proxy (a :: k) -> Proxy (b :: j) f :: forall k j (a :: k) (b :: j). Proxy a -> Proxy b -- old order f :: forall k (a :: k) j (b :: j). Proxy a -> Proxy b -- new order This is a breaking change for users of TypeApplications. Note that we still respect the dpendency order: 'k' before 'a', 'j' before 'b'. See "Ordering of specified variables" in the User's Guide. Related function: RnTypes.rnImplicitBndrs * In type synonyms and type family equations, free variables on the RHS are no longer implicitly quantified unless used in an outermost kind annotation: type T = Just (Nothing :: Maybe a) -- no longer accepted type T = Just Nothing :: Maybe (Maybe a) -- still accepted The latter form is a workaround due to temporary lack of an explicit quantification method. Ideally, we would write something along these lines: type T @a = Just (Nothing :: Maybe a) Related function: RnTypes.extractHsTyRdrTyVarsKindVars * Named wildcards in kinds are fixed (Trac #16334): x :: (Int :: _t) -- this compiles, infers (_t ~ Type) Related function: RnTypes.partition_nwcs Implementation notes -------------------- * One of the key changes is the removal of FKTV in RnTypes: - data FreeKiTyVars = FKTV { fktv_kis :: [Located RdrName] - , fktv_tys :: [Located RdrName] } + type FreeKiTyVars = [Located RdrName] We used to keep track of type and kind variables separately, but now that they are on equal footing when it comes to scoping, we can put them in the same list. * extract_lty and family are no longer parametrized by TypeOrKind, as we now do not distinguish kind variables from type variables. * PatSynExPE and the related Note [Pattern synonym existentials do not scope] have been removed (Trac #16315). With no implicit kind quantification, we can no longer trigger the error. * reportFloatingKvs and the related Note [Free-floating kind vars] have been removed. With no implicit kind quantification, we can no longer trigger the error.
* Skip T3424 when fast()wip/test-t3424Vladislav Zavialov2019-02-261-0/+1
| | | | 14586f5d removed this by accident.
* Fix the ghci063 test on Darwin (Trac #16201)wip/trac-16201Vladislav Zavialov2019-02-252-1/+13
| | | | | | | | | | | | | We use "touch -r" to set modification timestamps, which leads to precision loss on Darwin. For example, before: 2019-02-25 01:11:23.807627350 +0300 after: 2019-02-25 01:11:23.807627000 +0300 ^^^ This means we can't trick GHCi into thinking the file hasn't been changed by restoring its old timestamp, as we cannot faithfully restore all digits. The solution is to nullify the insignificant digits before the first :load
* Disable fragile test cases: T14697 T5559 T3424Vladislav Zavialov2019-02-243-6/+15
| | | | See Trac #15072, Trac #16349, Trac #16350
* base: Allow fusion for zip7 and relatedAlexandre2019-02-244-35/+109
| | | | | | | | | | | | | | | | | | Fixes #14037. Metric Decrease: T9872b T9872d Reviewers: bgamari, simonpj, hvr Reviewed By: simonpj Subscribers: AndreasK, simonpj, osa1, dfeuer, rwbarton, carter GHC Trac Issues: #14037 Differential Revision: https://phabricator.haskell.org/D5249
* testsuite: Fix whitespace in hp2ps error messageBen Gamari2019-02-231-1/+1
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* User's Guide: forall is a keyword nowadaysVladislav Zavialov2019-02-232-6/+11
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* User's Guide: update info on kind inferenceVladislav Zavialov2019-02-231-18/+18
| | | | | | | We no longer put class variables in front, see "Taming the Kind Inference Monster" (also fix some markup issues)
* Include closure header size in StgLamLift's estimationsSebastian Graf2019-02-231-4/+3
| | | | | | | | | | | While playing around with late lambda lifting, I realised that StgLamLift.Analysis doesn't consider the removed closure header in its allocation estimations. That's because contrary to what I thought, the total word count returned by `mkVirtHeapOffsets` doesn't include the size of the closure header. We just add the header size manually now.
* gitlab-ci: Only build x86_64-deb8 and fedora27 for releasesBen Gamari2019-02-231-2/+6
| | | | These are largely redundant as they are covered by x86_64-deb9.
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