[Git][ghc/ghc][wip/T24504] 5 commits: Rename Solo# data constructor to MkSolo# (#24673)

Tue May 7 18:44:24 UTC 2024

Serge S. Gulin pushed to branch wip/T24504 at Glasgow Haskell Compiler / GHC

Commits:
3b51995c by Andrei Borzenkov at 2024-05-07T14:39:40-04:00
Rename Solo# data constructor to MkSolo# (#24673)

- data Solo# a = (# a #)
+ data Solo# a = MkSolo# a

And `(# foo #)` syntax now becomes just a syntactic
sugar for `MkSolo# a`.

- - - - -
4d59abf2 by Arsen Arsenović at 2024-05-07T14:40:24-04:00
Add the cmm_cpp_is_gcc predicate to the testsuite

A future C-- test called T24474-cmm-override-g0 relies on the
GCC-specific behaviour of -g3 implying -dD, which, in turn, leads to it
emitting #defines past the preprocessing stage.  Clang, at least, does
not do this, so the test would fail if ran on Clang.

As the behaviour here being tested is ``-optCmmP-g3'' undoing effects of
the workaround we apply as a fix for bug #24474, and the workaround was
for GCC-specific behaviour, the test needs to be marked as fragile on
other compilers.

- - - - -
25b0b404 by Arsen Arsenović at 2024-05-07T14:40:24-04:00
Split out the C-- preprocessor, and make it pass -g0

Previously, C-- was processed with the C preprocessor program.  This
means that it inherited flags passed via -optc.  A flag that is somewhat
often passed through -optc is -g.  At certain -g levels (>=2), GCC
starts emitting defines *after* preprocessing, for the purposes of
debug info generation.  This is not useful for the C-- compiler, and, in
fact, causes lexer errors.  We can suppress this effect (safely, if
supported) via -g0.

As a workaround, in older versions of GCC (<=10), GCC only emitted
defines if a certain set of -g*3 flags was passed.  Newer versions check
the debug level.  For the former, we filter out those -g*3 flags and,
for the latter, we specify -g0 on top of that.

As a compatible and effective solution, this change adds a C--
preprocessor distinct from the C compiler and preprocessor, but that
keeps its flags.  The command line produced for C-- preprocessing now
looks like:

  $pgmCmmP $optCs_without_g3 $g0_if_supported $optCmmP

Closes: https://gitlab.haskell.org/ghc/ghc/-/issues/24474

- - - - -
8b5a4acd by Ben Gamari at 2024-05-07T21:43:57+03:00
IPE: Eliminate dependency on Read

Instead of encoding the closure type as decimal string we now simply
represent it as an integer, eliminating the need for `Read` in
`GHC.Internal.InfoProv.Types.peekInfoProv`.

Closes #24504.

-------------------------
Metric Decrease:
    T24602_perf_size
    size_hello_artifact
-------------------------

- - - - -
4e5ab5eb by Serge S. Gulin at 2024-05-07T21:43:57+03:00
IPE: WIP: Replace closure_desc string representation in logs output on Word32

- - - - -

30 changed files:

- compiler/GHC/Builtin/Types.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Iface/Recomp/Flags.hs
- compiler/GHC/Settings.hs
- compiler/GHC/Settings/IO.hs
- compiler/GHC/StgToCmm/InfoTableProv.hs
- compiler/GHC/SysTools/Cpp.hs
- compiler/GHC/SysTools/Tasks.hs
- configure.ac
- distrib/configure.ac.in
- docs/users_guide/phases.rst
- hadrian/bindist/Makefile
- hadrian/bindist/config.mk.in
- hadrian/cfg/default.host.target.in
- hadrian/cfg/default.target.in
- hadrian/src/Rules/Generate.hs
- libraries/ghc-boot/GHC/Utils/Encoding.hs
- libraries/ghc-experimental/src/Data/Tuple/Experimental.hs
- libraries/ghc-internal/src/GHC/Internal/InfoProv/Types.hsc
- libraries/ghc-prim/GHC/Types.hs
- libraries/template-haskell/Language/Haskell/TH/Lib/Syntax.hs
- + m4/fp_cmm_cpp_cmd_with_args.m4
- m4/fp_settings.m4
- m4/fp_setup_windows_toolchain.m4
- m4/ghc_toolchain.m4
- m4/prep_target_file.m4
- rts/IPE.c
- rts/Trace.c
- rts/eventlog/EventLog.c

The diff was not included because it is too large.

View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/a9badfdd0784db9f36611ecfeac841f8c44a004b...4e5ab5eba326524891adc788def8816d446b1ad0

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/a9badfdd0784db9f36611ecfeac841f8c44a004b...4e5ab5eba326524891adc788def8816d446b1ad0
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