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* Special case `mkTyConApp liftedTypeKind []`wip/ty-con-app-typeMatthew Pickering2020-02-212-2/+38
| | | | | | | | | | | | | We really need to make sure that these are shared because otherwise GHC will allocate thousands of identical `TyConApp` nodes. See #17292 ------------------------- Metric Decrease: haddock.Cabal T14683 -------------------------
* gitlab-ci: Avoid duplicating ~/.cabal contents with every buildBen Gamari2020-02-201-1/+2
| | | | | | | | Previously our attempt to cache the cabal store would `cp cabal-cache ~/.cabal`. However, if the latter already existed this meant that we would end up with ~/.cabal/cabal-cache. Not only would this not help caching but it would exponentially grow the size of ~/.cabal. Not good!
* gitlab-ci: Fix typo in BIN_DIST_PREP_TAR_COMP variable nameBen Gamari2020-02-201-2/+2
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* Mention users guide and release notes in merge request templateAdam Sandberg Eriksson2020-02-201-2/+3
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* Normalize types when dropping absent arguments from workersAlexis King2020-02-204-7/+21
| | | | fixes #17852
* Use TTG for HsSplicedT constructorKrzysztof Gogolewski2020-02-207-22/+26
| | | | | The constructor HsSplicedT occurs only in the GhcTc pass. This enforces this fact statically via TTG.
* Fix #17832: Weird handling of exports named main in 8.10-rc1Roland Senn2020-02-206-5/+23
| | | | | | | Switching from `lookupGlobalOccRn_maybe` to `lookupInfoOccRn` to check whether a `main` function is in scope. Unfortunately `lookupGlobalOccRn_maybe` complains if there are multiple `main` functions in scope.
* Use concatMap(M) instead of `concat . map` and the monadic variantÖmer Sinan Ağacan2020-02-2017-22/+24
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* Fix testsuite on powerpc64lePeter Trommler2020-02-207-20/+22
| | | | | | | | | | Remove expect broken on recomp tests, #11260 was closed by !2264 and #11323 most likely by !2264 as well. GHCi scripts tests work on GHCi but not the external interpreter, adjust test configuration accordingly. Fixes unexpected passes. Mark test requiring DWARF expect fail on powerpc64[le] for #11261.
* doc(List): Add examples to GHC.ListJulien Debon2020-02-202-82/+367
| | | | | | * Add examples * Cleanup documentation * Clarify merge process and Marge bot
* Disentangle DynFlags and SDocSylvain Henry2020-02-2035-400/+433
| | | | | | | | | | | | | Remove several uses of `sdocWithDynFlags`. The remaining ones are mostly CodeGen related (e.g. depend on target platform constants) and will be fixed separately. Metric Decrease: T12425 T9961 WWRec T1969 T14683
* Re-implement unsafe coercions in terms of unsafe equality proofsSimon Peyton Jones2020-02-2065-493/+1118
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (Commit message written by Omer, most of the code is written by Simon and Richard) See Note [Implementing unsafeCoerce] for how unsafe equality proofs and the new unsafeCoerce# are implemented. New notes added: - [Checking for levity polymorphism] in CoreLint.hs - [Implementing unsafeCoerce] in base/Unsafe/Coerce.hs - [Patching magic definitions] in Desugar.hs - [Wiring in unsafeCoerce#] in Desugar.hs Only breaking change in this patch is unsafeCoerce# is not exported from GHC.Exts, instead of GHC.Prim. Fixes #17443 Fixes #16893 NoFib ----- -------------------------------------------------------------------------------- Program Size Allocs Instrs Reads Writes -------------------------------------------------------------------------------- CS -0.1% 0.0% -0.0% -0.0% -0.0% CSD -0.1% 0.0% -0.0% -0.0% -0.0% FS -0.1% 0.0% -0.0% -0.0% -0.0% S -0.1% 0.0% -0.0% -0.0% -0.0% VS -0.1% 0.0% -0.0% -0.0% -0.0% VSD -0.1% 0.0% -0.0% -0.0% -0.1% VSM -0.1% 0.0% -0.0% -0.0% -0.0% anna -0.0% 0.0% -0.0% -0.0% -0.0% ansi -0.1% 0.0% -0.0% -0.0% -0.0% atom -0.1% 0.0% -0.0% -0.0% -0.0% awards -0.1% 0.0% -0.0% -0.0% -0.0% banner -0.1% 0.0% -0.0% -0.0% -0.0% bernouilli -0.1% 0.0% -0.0% -0.0% -0.0% binary-trees -0.1% 0.0% -0.0% -0.0% -0.0% boyer -0.1% 0.0% -0.0% -0.0% -0.0% boyer2 -0.1% 0.0% -0.0% -0.0% -0.0% bspt -0.1% 0.0% -0.0% -0.0% -0.0% cacheprof -0.1% 0.0% -0.0% -0.0% -0.0% calendar -0.1% 0.0% -0.0% -0.0% -0.0% cichelli -0.1% 0.0% -0.0% -0.0% -0.0% circsim -0.1% 0.0% -0.0% -0.0% -0.0% clausify -0.1% 0.0% -0.0% -0.0% -0.0% comp_lab_zift -0.1% 0.0% -0.0% -0.0% -0.0% compress -0.1% 0.0% -0.0% -0.0% -0.0% compress2 -0.1% 0.0% -0.0% -0.0% -0.0% constraints -0.1% 0.0% -0.0% -0.0% -0.0% cryptarithm1 -0.1% 0.0% -0.0% -0.0% -0.0% cryptarithm2 -0.1% 0.0% -0.0% -0.0% -0.0% cse -0.1% 0.0% -0.0% -0.0% -0.0% digits-of-e1 -0.1% 0.0% -0.0% -0.0% -0.0% digits-of-e2 -0.1% 0.0% -0.0% -0.0% -0.0% dom-lt -0.1% 0.0% -0.0% -0.0% -0.0% eliza -0.1% 0.0% -0.0% -0.0% -0.0% event -0.1% 0.0% -0.0% -0.0% -0.0% exact-reals -0.1% 0.0% -0.0% -0.0% -0.0% exp3_8 -0.1% 0.0% -0.0% -0.0% -0.0% expert -0.1% 0.0% -0.0% -0.0% -0.0% fannkuch-redux -0.1% 0.0% -0.0% -0.0% -0.0% fasta -0.1% 0.0% -0.5% -0.3% -0.4% fem -0.1% 0.0% -0.0% -0.0% -0.0% fft -0.1% 0.0% -0.0% -0.0% -0.0% fft2 -0.1% 0.0% -0.0% -0.0% -0.0% fibheaps -0.1% 0.0% -0.0% -0.0% -0.0% fish -0.1% 0.0% -0.0% -0.0% -0.0% fluid -0.1% 0.0% -0.0% -0.0% -0.0% fulsom -0.1% 0.0% +0.0% +0.0% +0.0% gamteb -0.1% 0.0% -0.0% -0.0% -0.0% gcd -0.1% 0.0% -0.0% -0.0% -0.0% gen_regexps -0.1% 0.0% -0.0% -0.0% -0.0% genfft -0.1% 0.0% -0.0% -0.0% -0.0% gg -0.1% 0.0% -0.0% -0.0% -0.0% grep -0.1% 0.0% -0.0% -0.0% -0.0% hidden -0.1% 0.0% -0.0% -0.0% -0.0% hpg -0.1% 0.0% -0.0% -0.0% -0.0% ida -0.1% 0.0% -0.0% -0.0% -0.0% infer -0.1% 0.0% -0.0% -0.0% -0.0% integer -0.1% 0.0% -0.0% -0.0% -0.0% integrate -0.1% 0.0% -0.0% -0.0% -0.0% k-nucleotide -0.1% 0.0% -0.0% -0.0% -0.0% kahan -0.1% 0.0% -0.0% -0.0% -0.0% knights -0.1% 0.0% -0.0% -0.0% -0.0% lambda -0.1% 0.0% -0.0% -0.0% -0.0% last-piece -0.1% 0.0% -0.0% -0.0% -0.0% lcss -0.1% 0.0% -0.0% -0.0% -0.0% life -0.1% 0.0% -0.0% -0.0% -0.0% lift -0.1% 0.0% -0.0% -0.0% -0.0% linear -0.1% 0.0% -0.0% -0.0% -0.0% listcompr -0.1% 0.0% -0.0% -0.0% -0.0% listcopy -0.1% 0.0% -0.0% -0.0% -0.0% maillist -0.1% 0.0% -0.0% -0.0% -0.0% mandel -0.1% 0.0% -0.0% -0.0% -0.0% mandel2 -0.1% 0.0% -0.0% -0.0% -0.0% mate -0.1% 0.0% -0.0% -0.0% -0.0% minimax -0.1% 0.0% -0.0% -0.0% -0.0% mkhprog -0.1% 0.0% -0.0% -0.0% -0.0% multiplier -0.1% 0.0% -0.0% -0.0% -0.0% n-body -0.1% 0.0% -0.0% -0.0% -0.0% nucleic2 -0.1% 0.0% -0.0% -0.0% -0.0% para -0.1% 0.0% -0.0% -0.0% -0.0% paraffins -0.1% 0.0% -0.0% -0.0% -0.0% parser -0.1% 0.0% -0.0% -0.0% -0.0% parstof -0.1% 0.0% -0.0% -0.0% -0.0% pic -0.1% 0.0% -0.0% -0.0% -0.0% pidigits -0.1% 0.0% -0.0% -0.0% -0.0% power -0.1% 0.0% -0.0% -0.0% -0.0% pretty -0.1% 0.0% -0.1% -0.1% -0.1% primes -0.1% 0.0% -0.0% -0.0% -0.0% primetest -0.1% 0.0% -0.0% -0.0% -0.0% prolog -0.1% 0.0% -0.0% -0.0% -0.0% puzzle -0.1% 0.0% -0.0% -0.0% -0.0% queens -0.1% 0.0% -0.0% -0.0% -0.0% reptile -0.1% 0.0% -0.0% -0.0% -0.0% reverse-complem -0.1% 0.0% -0.0% -0.0% -0.0% rewrite -0.1% 0.0% -0.0% -0.0% -0.0% rfib -0.1% 0.0% -0.0% -0.0% -0.0% rsa -0.1% 0.0% -0.0% -0.0% -0.0% scc -0.1% 0.0% -0.1% -0.1% -0.1% sched -0.1% 0.0% -0.0% -0.0% -0.0% scs -0.1% 0.0% -0.0% -0.0% -0.0% simple -0.1% 0.0% -0.0% -0.0% -0.0% solid -0.1% 0.0% -0.0% -0.0% -0.0% sorting -0.1% 0.0% -0.0% -0.0% -0.0% spectral-norm -0.1% 0.0% -0.0% -0.0% -0.0% sphere -0.1% 0.0% -0.0% -0.0% -0.0% symalg -0.1% 0.0% -0.0% -0.0% -0.0% tak -0.1% 0.0% -0.0% -0.0% -0.0% transform -0.1% 0.0% -0.0% -0.0% -0.0% treejoin -0.1% 0.0% -0.0% -0.0% -0.0% typecheck -0.1% 0.0% -0.0% -0.0% -0.0% veritas -0.0% 0.0% -0.0% -0.0% -0.0% wang -0.1% 0.0% -0.0% -0.0% -0.0% wave4main -0.1% 0.0% -0.0% -0.0% -0.0% wheel-sieve1 -0.1% 0.0% -0.0% -0.0% -0.0% wheel-sieve2 -0.1% 0.0% -0.0% -0.0% -0.0% x2n1 -0.1% 0.0% -0.0% -0.0% -0.0% -------------------------------------------------------------------------------- Min -0.1% 0.0% -0.5% -0.3% -0.4% Max -0.0% 0.0% +0.0% +0.0% +0.0% Geometric Mean -0.1% -0.0% -0.0% -0.0% -0.0% Test changes ------------ - break006 is marked as broken, see #17833 - The compiler allocates less when building T14683 (an unsafeCoerce#- heavy happy-generated code) on 64-platforms. Allocates more on 32-bit platforms. - Rest of the increases are tiny amounts (still enough to pass the threshold) in micro-benchmarks. I briefly looked at each one in a profiling build: most of the increased allocations seem to be because of random changes in the generated code. Metric Decrease: T14683 Metric Increase: T12150 T12234 T12425 T13035 T14683 T5837 T6048 Co-Authored-By: Richard Eisenberg <rae@cs.brynmawr.edu> Co-Authored-By: Ömer Sinan Ağacan <omeragacan@gmail.com>
* 8.10 Release notes for --disable-delayed-os-memory-return [skip ci]Niklas Hambüchen2020-02-201-0/+15
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* 8.10 Release notes for atomic .o writes [skip ci]Niklas Hambüchen2020-02-201-0/+15
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* Modules: Llvm (#13009)Sylvain Henry2020-02-1816-68/+73
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* Fix testsuite driver output (#17847)Vladislav Zavialov2020-02-181-1/+1
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* Fix unboxed tuple size limit (#17837)Joshua Price2020-02-183-3/+55
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* Remove the MonadFail P instanceVladislav Zavialov2020-02-184-27/+11
| | | | | | | | | | | | | There were two issues with this instance: * its existence meant that a pattern match failure in the P monad would produce a user-visible parse error, but the error message would not be helpful to the user * due to the MFP migration strategy, we had to use CPP in Lexer.x, and that created issues for #17750 Updates haddock submodule.
* Hadrian: refactor GMP in-tree build support (#17756)Sylvain Henry2020-02-188-117/+145
| | | | | | | | | | | | | | | | | | | | | | | | | | | | * Hadrian doesn't use integer-gmp/config.mk file anymore to determine if building GMP in-tree is required. "config.mk" is created by Cabal when the integer-gmp package is configured and this file is still untracked by Hadrian. This led to a tricky configure "race" because "config.mk" is built by the "setup-config" rule, but this rule is also used to find dependencies, in particular the "ghc-gmp.h" header, but the creation of this file was depending (without being tracked) on "config.mk". Now Hadrian only builds in-tree GMP if `--with-intree-gmp` is passed to the top-level configure script. * in-tree GMP isn't built once for all in a fixed stage (Stage1) anymore. It is built per stage which is required if we build a cross-compiler * switching between in-tree and external GMP is now supported without having to clean the build directory first. * "wrappers.c" now includes "ghc-gmp.h" instead of "ghc.h". It helps ensuring that the build system generates "ghc-gmp.h". * build in-tree GMP in "<root>/stageN/gmp/gmpbuild" and produce useful artefacts (libgmp.a, gmp.h, objs/*.o) in "<root>/stageN/gmp"
* If a :reload finds syntax errors in the module graph, remove the loaded ↵Roland Senn2020-02-185-20/+40
| | | | | | | | | | modules. (Fixes #17549) The processing in `compiler/main/GhcMake.hs` computes the ModuleGraph. If it finds errors in the module header or in the import specifications, then the new module graph is incomplete and should not be used. The code before #17549 just reported the errors and left the old ModuleGraph in place. The new code of this MR replaces the old ModuleGraph with an empty one.
* Fix the "unused terminals: 2" warning in Parser.yVladislav Zavialov2020-02-161-3/+1
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* testsuite: Probe whether symlinks are usable on WindowsBen Gamari2020-02-161-1/+23
| | | | Closes #17706.
* Revert "users-guide: Document -ddump-srts"Ömer Sinan Ağacan2020-02-161-6/+0
| | | | | | | | This reverts commit 8cf646d36b02b8ea1c289cb52781c9171853b514. The flag was removed by 16d643cf. [ci skip]
* testsuite: Sort test names in expected change outputBen Gamari2020-02-151-3/+3
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* Accept performance changesBen Gamari2020-02-150-0/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These manifested in the integer-simple job. Metric Decrease: T12227 T5549 T14936 T4830 Conversions T5237 T8766 T4801 T10359 Metric Increase: T12234 T6048 T3294 T14683 T3064 T9872b T9872c T783 T5837 T10678 T14697 T5631 T9203 T13719 T12707 T13056 T9630 T10547 T9872d T1969 WWRec T10370 T5321FD haddock.Cabal T5642 T9872a T15263 T12425 MultiLayerModules T5205 T9233 T13379 haddock.base T9020 T13035 T12150 T9961
* users-guide: Fix broken referenceBen Gamari2020-02-141-1/+1
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* users-guide: Document -ddump-srtsBen Gamari2020-02-141-0/+6
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* compare-flags: Fix outputBen Gamari2020-02-141-6/+9
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* Bump Cabal submoduleBen Gamari2020-02-141-0/+0
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* Revert "compiler: Disable atomic renaming on Windows"Tamar Christina2020-02-141-13/+1
| | | | | | | The original reason this was disabled should be fixed by the previous commit. This reverts commit 1c1b63d63efe8b0f789aa7d5b87cfac3edd213eb.
* SysTools: Use "process job" when spawning processes on WindowsTamar Christina2020-02-141-3/+16
| | | | | | | | | | | | | | GHC should make calls using process jobs when calling out to GCC and LD. The reason is these use the exec () family of posix functions. Window's process model doesn't allow replacement of processes so this is emulated by creating a new process and immediately exiting the old one. Because of this when using normal Windows wait functions you would return even without the child process having finished. In this case if you are depending on data from the child you will enter a race condition. The usual fix for this is to use process jobs and wait for the termination of all children that have ever been spawn by the process you called. But also waiting for the freeing of all resources.
* Bump process submoduleBen Gamari2020-02-141-0/+0
| | | | | | | Folds in the second part of Phyx's Windows process exit fixes [1], hopefully finally resolving issue #17480. [1] https://github.com/haskell/process/pull/160
* gitlab-ci: Drop unnecessary GHC_VERSION checkBen Gamari2020-02-141-4/+0
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* gitlab-ci: Allow Windows build to fail due to #17777Ben Gamari2020-02-141-0/+1
| | | | | | The fact that `exec` isn't POSIX compliant means that things can break in arbitrarily bad ways. Sometimes things happen to work correctly but sadly this isn't always the case.
* gitlab-ci: Always use mingw64 python on WindowsBen Gamari2020-02-141-0/+3
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* gitlab-ci: Build integer-simple job in the validate flavourBen Gamari2020-02-141-0/+1
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* gitlab-ci: Allow i386 Windows builds to fail againBen Gamari2020-02-141-0/+2
| | | | Due to the resistance of #17736 to resolution.
* rts: Add more debug output to failed path in onIOCompleteBen Gamari2020-02-141-2/+3
| | | | This will help track down #17035.
* compare-flags: Don't rely on encoding flag of subprocess.check_outputBen Gamari2020-02-141-3/+2
| | | | Apparently it isn't supported by some slightly older Python versions.
* testsuite: Assert the opsys names are knownBen Gamari2020-02-141-0/+11
| | | | | | Previously opsys would take any string. This meant it was very easy for a typo to silently render the predicate ineffective. Fix this by checking the given operating system name against a list of known values.
* testsuite: Mark T7702 as fragile on WindowsBen Gamari2020-02-141-1/+1
| | | | | Due to #16799. There was previously an attempt to mark it as broken but the `opsys` name was incorrect.
* users-guide: Fix "invalid file" failureBen Gamari2020-02-141-1/+1
| | | | I have no idea how this worked previously. Different Python version?
* hadrian: Drop empty arguments from target listBen Gamari2020-02-141-1/+1
| | | | Fixes #17748.
* gitlab-ci: Fix various shellcheck warningsBen Gamari2020-02-141-42/+55
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* docs/compare-flags: Don't use python f-stringsBen Gamari2020-02-141-4/+4
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* users-guide: Fix unknown link targetsBen Gamari2020-02-142-6/+17
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* configure: Fix sphinx version testBen Gamari2020-02-141-1/+1
| | | | The check for the "v" prefix is redundant.
* base: Always clamp reads/writes to 2GB in lengthBen Gamari2020-02-141-9/+6
| | | | | | | | | | | | Previously we did this only on Darwin due to #17414. However, even on other platforms >2GB writes are on shaky ground. POSIX explicitly says that the result is implementation-specified and Linux will write at most 0x7ffff000, even on 64-bit platforms. Moreover, getting the sign of the syscall result correct is tricky, as demonstrated by the fact that T17414 currently fails on FreeBSD. For simplicity we now just uniformly clamp to 0x7ffff000 on all platforms.
* Pass -Wno-unused-command-line-arguments during link on FreeBSDBen Gamari2020-02-141-1/+3
| | | | | FreeBSD cc throws a warning if we pass -pthread without actually using any pthread symbols.
* testsuite/T16930: Don't rely on gnu grep specific --includeBen Gamari2020-02-142-12/+12
| | | | In BSD grep this flag only affects directory recursion.
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