- Feb 08, 2023
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Ticket #22807 pointed out that the RHS sharing was not compatible with -fignore-interface-pragmas because the flag would remove unfoldings from identifiers before the `extra-decls` field was populated. For the 9.6 timescale the only solution is to disable this sharing, which will make interface files bigger but this is acceptable for the first release of `-fwrite-if-simplified-core`. For 9.8 it would be good to fix this by implementing #20056 due to the large number of other bugs that would fix. I also improved the error message in tc_iface_binding to avoid the "no match in record selector" error but it should never happen now as the entire sharing logic is disabled. Also added the currently broken test for #22807 which could be fixed by !6080 Fixes #22807 (cherry picked from commit 0ada4547)
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- Feb 01, 2023
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In #22764 a user noticed that a program implementing a simple atomic counter via an STRef regressed significantly due to the introduction of necessary atomic operations in the MutVar# primops (#22468). This regression was caused by a bug in the NCG, which emitted an unnecessary MFENCE instruction for a release-ordered atomic write. MFENCE is rather only needed to achieve sequentially consistent ordering. Fixes #22764. (cherry picked from commit f058e367)
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Currently, the wasm NCG has an implicit assumption: all CmmSwitch scrutinees are 32-bit integers. This is not always true; #22864 is one counter-example with a 64-bit scrutinee. This patch fixes the logic by explicitly converting the scrutinee to a word that can be used as a br_table operand. Fixes #22871. Also includes a regression test. (cherry picked from commit f0eefa3c)
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Fixes #22862. (cherry picked from commit 22089f69)
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gamma is a glibc-only deprecated function, use tgamma instead. It's required for fixing cg007 when testing the wasm unregisterised codegen. (cherry picked from commit 7716cbe6)
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This patch fixes a few places in RtsFlags.c that may result in divide-by-zero error when tickInterval=0, which is the default on wasm. Fixes #22603. (cherry picked from commit fd8f32bf)
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Previously we tried to lower the alignment requirement as far as possible, based on the section kind inferred from the CLabel. For info tables, .p2align 1 was applied given the GC should only need the lowest bit to tag forwarding pointers. But this would lead to unaligned loads/stores, which has a performance penalty even if the wasm spec permits it. Furthermore, the test suite has shown memory corruption in a few cases when compacting gc is used. This patch takes a more conservative approach: all data sections except C strings align to word size. (cherry picked from commit da468391)
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Properly handle ForeignHints of ccall arguments/return value, insert sign extends and truncations when handling signed subwords. Fixes #22852. (cherry picked from commit 78c07219)
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Matthew Pickering authored
* Allow filepath to be reinstalled * Bump some version bounds to allow newer versions of libraries * Rework testing logic to avoid "install --lib" and package env files Fixes #22344 (cherry picked from commit 7cbdaad0)
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The CmmBlock datacon was not handled in lower_CmmLit, since I thought it would have been eliminated after proc-point splitting. Turns out it still occurs in very rare occasions, and this patch is needed to fix T9329 for wasm. (cherry picked from commit 6ea2aa02)
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This patch fixes the W8/W16 literal narrowing logic in the wasm NCG, which used to lower it to something like i32.const -1, without properly zeroing-out the unused higher bits. Fixes #22608. (cherry picked from commit 7e11c6dc)
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(cherry picked from commit c9ad8852)
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The key change is that in GHC.Core.Opt.Specialise.specLookupRule we were using realIdUnfolding, which ignores the loop-breaker flag. When given a loop breaker, rule matching therefore looped infinitely -- #22802. In fixing this I refactored a bit. * Define GHC.Core.InScopeEnv as a data type, and use it. (Previously it was a pair: hard to grep for.) * Put several functions returning an IdUnfoldingFun into GHC.Types.Id, namely idUnfolding alwaysActiveUnfoldingFun, whenActiveUnfoldingFun, noUnfoldingFun and use them. (The are all loop-breaker aware.) (cherry picked from commit d0f34f25) -
This teaches Hadrian to substitute the `LIBRARY_*_VERSION` variables in `libraries/prologue.txt`, fixing #22714. Fixes #22714. (cherry picked from commit 93f0e3c4)
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This refactors Hadrian's autoconf-style templating logic to be explicit about which interpolation variables should be substituted in which files. This clears the way to fix #22714 without incurring rule cycles. (cherry picked from commit 2e48c19a)
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The package-version discovery logic in `doc/users_guide/package_versions.py` uses packages' cabal files to determine package versions. Teach Sphinx about these dependencies in cases where the cabal files are generated by templates. (cherry picked from commit f838815c)
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Teach the `configure` script to create the `VERSION` file. This will serve as the stable interface to allow the user to determine the version number of a working tree. Fixes #22322. (cherry picked from commit a2d814dc)
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This patch fixes two issues in the way that `type data` declarations were reified with Template Haskell: * `type data` data constructors are now properly reified using `DataConI`. This is accomplished with a special case in `reifyTyCon`. Fixes #22818. * `type data` type constructors are now reified in `reifyTyCon` using `TypeDataD` instead of `DataD`. Fixes #22819. (cherry picked from commit 2f145052)
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Unlike most other data constructors, data constructors declared with `type data` are represented in `TyThing`s as `ATyCon` rather than `ADataCon`. The `ATyCon` case in `tyThingParent_maybe` previously did not consider the possibility of the underlying `TyCon` being a promoted data constructor, which led to the oddities observed in #22817. This patch adds a dedicated special case in `tyThingParent_maybe`'s `ATyCon` case for `type data` data constructors to fix these oddities. Fixes #22817. (cherry picked from commit 20598ef6)
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Fixes #11270 (cherry picked from commit f83374f8)
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(cherry picked from commit 082b7d43)
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(cherry picked from commit c9967d13)
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We were treating a type-family instance as a non-orphan if there was a type constructor on its /right-hand side/ that was local. Boo! Utterly wrong. With this patch, we correctly check the /left-hand side/ instead! Fixes #22717 (cherry picked from commit 638277ba)
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(cherry picked from commit 2cb500a5)
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Previously various `Instr` queries used by the graph-colouring allocator failed to handle a few pseudo-instructions. This manifested in compiler panicks while compiling `SHA`, which uses `-fregs-graph`. Fixes #22798. (cherry picked from commit 7566fd9d)
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Previously trivColourable for AArch64 claimed that at 18 registers were trivially-colourable. This is incorrect as x18 is reserved by the platform on AArch64/Darwin. See #22798. (cherry picked from commit 30989d13)
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Previously various panics would rely on a half-written Show instance, leading to very unhelpful errors. Fix this. See #22798. (cherry picked from commit be417a47)
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Previously, when using `capi` calling convention in foreign declarations, code generator failed to handle const-cualified pointer return types. This resulted in CC toolchain throwing `-Wincompatible-pointer-types-discards-qualifiers` warning. `Foreign.C.Types.ConstPtr` newtype was introduced to handle these cases - special treatment was put in place to generate appropritetly qualified C wrapper that no longer triggers the above mentioned warning. Fixes #22043. (cherry picked from commit b3a3534b)
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Previously we used `static_assert` which is only available in C23. By contrast, C11 only provides `_Static_assert`. Fixes #22777 (cherry picked from commit e480fbc2)
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To be able to capture string literals with possible escape codes as labels. Close #22771 (cherry picked from commit fec7c2ea)
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Closes #22765 (cherry picked from commit 97ac8230)
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To match ghc-exactprint https://github.com/alanz/ghc-exactprint/pull/121 (cherry picked from commit 965a2735)
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See Note [Unwrap newtypes first], which has the details. Close #22519. (cherry picked from commit 3e827c3f)
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We use keepCAFsForGHCi.c to force -fkeep-cafs behaviour by using a __attribute__((constructor)) function. This broke for static builds where the linker discarded the object file since it was not reverenced from any exported code. We fix this by asserting that the flag is enabled using a function in the same module as the constructor. Which causes the object file to be retained by the linker, which in turn causes the constructor the be run in static builds. This changes nothing for dynamic builds using the ghc library. But causes static to also retain CAFs (as we expect them to). Fixes #22417. ------------------------- Metric Decrease: T21839r ------------------------- (cherry picked from commit 08ba8720)
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- Jan 28, 2023
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Matthew Pickering authored
In particular we do not have a release job for FreeBSD so the generation of the platform mapping was failing.
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- Jan 27, 2023
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Ben Gamari authored
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Matthew Pickering authored
These were not uploaded for alpha1 Fixes #22844
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Matthew Pickering authored
This check makes sure that if a job is a prefixed by "release-" then the script downloads it and understands how to map the job name to the platform.
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Matthew Pickering authored
We no longer attempt to build or distribute this release
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