- Oct 10, 2023
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When the offset doesn't fit into the immediate we now just reuse the general getRegister' code path which is well optimized to compute the offset into a register instead of a special case for CmmRegOff. This means we generate a lot less code under certain conditions which is why performance metrics for these improve. ------------------------- Metric Decrease: T4801 T5321FD T5321Fun ------------------------- -
Remove some special cases which can be handled just as well by the generic case. This increases code re-use while also fixing #23749. Since some of the special case wasn't upholding Note [Signed arithmetic on AArch64].
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Try to generate instr x2, <imm> instead of mov x1, lit instr x2, x1 When possible. This get's rid if quite a few redundant mov instructions. I believe this causes a metric decrease for LargeRecords as we reduce register pressure. ------------------------- Metric Decrease: LargeRecord ------------------------- -
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Fixes #24071.
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This adds a rule which triggers the javascript job when the "javascript" label is assigned to an MR.
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I noticed some thunking while looking at Core. This change has very modest, but throughout positive ghc/alloc effect: ``` hard_hole_fits(normal) ghc/alloc 283,057,664 281,620,872 -0.5% geo. mean -0.1% minimum -0.5% maximum +0.0% ``` Fixes #23964. -
For consistency with later stages and CC.
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Stop passing -gcc-options which mixed together linker flags and non-linker flags. There's no guarantee the C compiler will accept both of these in each mode.
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As noted in `Note [Don't pass --target to emscripten toolchain]`, emscripten's `emcc` is rather inconsistent with respect to its treatment of the `--target` flag. Avoid this by special-casing this toolchain in the `configure` script and `ghc-toolchain`. Fixes on aspect of #23744.
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emcc when used as a linker seems to ignore the --target flag, and for consistency with configure which now tests for --target, we remove this special case.
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`-no-pie` is a flag we pass when using the C compiler as a linker (see pieCCLDOpts in GHC.Driver.Session) so we should test whether the C compiler used as a linker supports the flag, rather than just the C compiler.
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This is a small QOL change as if you are working on ghc-toolchain and it fails to compile then configure will continue and can give you outdated results.
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We were attempting to use the C compiler, as a linker, to compile a file in the nopie check, but that won't work in general as the flags we pass to the linker might not be compatible with the ones we pass when using the C compiler.
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There are situations where the C compiler doesn't accept `--target` but when used as a linker it does (but doesn't do anything most likely) In particular with old gcc toolchains, the C compiler doesn't support --target but when used as a linker it does.
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In ./configure the C99 flag is passed to the C compiler when used as a C preprocessor. So we also check the same thing in ghc-toolchain.
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We want to make sure that LD is set to an absolute path in order to be consistent with the `LD=$(command -v ld)` call. The AC_PATH_TARGET_TOOL macro uses the absolute path rather than AC_CHECK_TARGET_TOOL which might use a relative path.
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In very old toolchains the BYTE_ORDER macro is not set but thankfully the __BYTE_ORDER__ macro can be used instead.
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Previously we failed to try enabling C99 support with `-std=c99`, as `autoconf` attempts. This broke on older compilers (e.g. CentOS 7) which don't enable C99 by default. Fixes #23879.
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In the ./configure script, if you pass the `LD` variable then this has the effect of stopping use searching for a linker and hence passing `-fuse-ld=...`. We want to emulate this logic in ghc-toolchain, if a use explicilty specifies `LD` variable then don't add `-fuse-ld=..` with the goal of making ./configure and ghc-toolchain agree on which flags to use when using the C compiler as a linker. This is quite unsavoury as we don't bake the choice of LD into the configuration anywhere but what's important for now is making ghc-toolchain and ./configure agree as much as possible. See #23857 for more discussion
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Towards #23868
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This is copied from m4/ghc_convert_vendor.m4 Towards #23868
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We were not normalising the target triple anymore like we did with the old make build system. Fixes #23856
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This allows you to load ghc-toolchain and ghc-toolchain-bin into HLS.
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The motivation for the flag is given in #21917.
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The class is defined as class HasAnnotation e where noAnnSrcSpan :: SrcSpan -> e This generalises noAnnSrcSpan, and allows noLocA :: (HasAnnotation e) => a -> GenLocated e a noLocA = L (noAnnSrcSpan noSrcSpan)
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- Oct 08, 2023
- Oct 07, 2023
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- Oct 06, 2023
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Finley McIlwaine authored
In the `StgRhsCon` case of `GHC.Stg.Debug.collectStgRhs`, we were not coming up with an initial source span based on the span of the binder, which was causing instance dictionaries without dynamic superclass constraints to not have source locations in their IPE info. Now they do. Resolves #24005
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- Oct 05, 2023
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Fixes #23802
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