[GCC-11] [PATCH 0/5] Finish <x86gprintrin.h> and general-regs-only

[Richard Biener]

On Fri, Aug 13, 2021 at 3:51 PM H.J. Lu <hjl.tools@gmail.com> wrote:
>
> <x86gprintrin.h> and target("general-regs-only") function attribute
> were added to GCC 11.  But their implementations are incomplete.  I'd
> like to backport the following patches to GCC 11 branch to finish them.

Fine with me if x86 maintainers do not disagree (also see one comment I have
on the -mwait adding patch).

> H.J. Lu (5):
>   x86: Add -mmwait for -mgeneral-regs-only
>   x86: Use crc32 target option for CRC32 intrinsics
>   x86: Remove OPTION_MASK_ISA_SSE4_2 from CRC32 _builtin functions
>   x86: Enable the GPR only instructions for -mgeneral-regs-only
>   <x86gprintrin.h>: Add pragma GCC target("general-regs-only")
>
>  gcc/common/config/i386/i386-common.c       |  45 ++-
>  gcc/config.gcc                             |   6 +-
>  gcc/config/i386/i386-builtin.def           |   8 +-
>  gcc/config/i386/i386-builtins.c            |   4 +-
>  gcc/config/i386/i386-c.c                   |   2 +
>  gcc/config/i386/i386-options.c             |  12 +
>  gcc/config/i386/i386.c                     |   6 +-
>  gcc/config/i386/i386.h                     |   2 +
>  gcc/config/i386/i386.md                    |   4 +-
>  gcc/config/i386/i386.opt                   |   4 +
>  gcc/config/i386/ia32intrin.h               |  42 ++-
>  gcc/config/i386/mwaitintrin.h              |  52 +++
>  gcc/config/i386/pmmintrin.h                |  13 +-
>  gcc/config/i386/serializeintrin.h          |   7 +-
>  gcc/config/i386/sse.md                     |   4 +-
>  gcc/config/i386/x86gprintrin.h             |  13 +
>  gcc/doc/extend.texi                        |   5 +
>  gcc/doc/invoke.texi                        |   8 +-
>  gcc/testsuite/gcc.target/i386/crc32-6.c    |  13 +
>  gcc/testsuite/gcc.target/i386/monitor-2.c  |  27 ++
>  gcc/testsuite/gcc.target/i386/pr101492-1.c |  10 +
>  gcc/testsuite/gcc.target/i386/pr101492-2.c |  10 +
>  gcc/testsuite/gcc.target/i386/pr101492-3.c |  10 +
>  gcc/testsuite/gcc.target/i386/pr101492-4.c |  12 +
>  gcc/testsuite/gcc.target/i386/pr99744-3.c  |  13 +
>  gcc/testsuite/gcc.target/i386/pr99744-4.c  | 357 +++++++++++++++++++++
>  gcc/testsuite/gcc.target/i386/pr99744-5.c  |  25 ++
>  gcc/testsuite/gcc.target/i386/pr99744-6.c  |  23 ++
>  gcc/testsuite/gcc.target/i386/pr99744-7.c  |  12 +
>  gcc/testsuite/gcc.target/i386/pr99744-8.c  |  13 +
>  30 files changed, 717 insertions(+), 45 deletions(-)
>  create mode 100644 gcc/config/i386/mwaitintrin.h
>  create mode 100644 gcc/testsuite/gcc.target/i386/crc32-6.c
>  create mode 100644 gcc/testsuite/gcc.target/i386/monitor-2.c
>  create mode 100644 gcc/testsuite/gcc.target/i386/pr101492-1.c
>  create mode 100644 gcc/testsuite/gcc.target/i386/pr101492-2.c
>  create mode 100644 gcc/testsuite/gcc.target/i386/pr101492-3.c
>  create mode 100644 gcc/testsuite/gcc.target/i386/pr101492-4.c
>  create mode 100644 gcc/testsuite/gcc.target/i386/pr99744-3.c
>  create mode 100644 gcc/testsuite/gcc.target/i386/pr99744-4.c
>  create mode 100644 gcc/testsuite/gcc.target/i386/pr99744-5.c
>  create mode 100644 gcc/testsuite/gcc.target/i386/pr99744-6.c
>  create mode 100644 gcc/testsuite/gcc.target/i386/pr99744-7.c
>  create mode 100644 gcc/testsuite/gcc.target/i386/pr99744-8.c
>
> --
> 2.31.1
>