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Subject: [Bug target/101865] _ARCH_PWR8 is not defined when using
 -mcpu=power8
Date: Thu, 02 May 2024 13:20:42 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101865

--- Comment #25 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Peter Bergner
<bergner@gcc.gnu.org>:

https://gcc.gnu.org/g:04ca18ff5e2592ac88a5b72248332f519a17184b

commit r12-10409-g04ca18ff5e2592ac88a5b72248332f519a17184b
Author: Will Schmidt <will_schmidt@linux.ibm.com>
Date:   Fri Apr 12 14:55:16 2024 -0500

    rs6000: Add OPTION_MASK_POWER8 [PR101865]

    The bug in PR101865 is the _ARCH_PWR8 predefine macro is conditional up=
on
    TARGET_DIRECT_MOVE, which can be false for some -mcpu=3Dpower8 compiles=
 if
the
    -mno-altivec or -mno-vsx options are used.  The solution here is to cre=
ate
    a new OPTION_MASK_POWER8 mask that is true for -mcpu=3Dpower8, regardle=
ss of
    Altivec or VSX enablement.

    Unfortunately, the only way to create an OPTION_MASK_* mask is to create
    a new option, which we have done here, but marked it as WarnRemoved sin=
ce
    we do not want users using it.  For stage1, we will look into how we can
    create ISA mask flags for use in the compiler without the need for expl=
icit
    options.

    2024-04-12  Will Schmidt  <will_schmidt@linux.ibm.com>
                Peter Bergner  <bergner@linux.ibm.com>

    gcc/
            PR target/101865
            * config/rs6000/rs6000-builtin.cc (rs6000_builtin_is_supported):
Use
            TARGET_POWER8.
            * config/rs6000/rs6000-c.cc (rs6000_target_modify_macros): Use
            OPTION_MASK_POWER8.
            * config/rs6000/rs6000-cpus.def (POWERPC_MASKS): Add
OPTION_MASK_POWER8.
            (ISA_2_7_MASKS_SERVER): Likewise.
            * config/rs6000/rs6000.cc (rs6000_option_override_internal): Up=
date
            comment.  Use OPTION_MASK_POWER8 and TARGET_POWER8.
            * config/rs6000/rs6000.h (TARGET_SYNC_HI_QI): Use TARGET_POWER8.
            * config/rs6000/rs6000.md (define_attr "isa"): Add p8.
            (define_attr "enabled"): Handle it.
            (define_insn "prefetch"): Use TARGET_POWER8.
            * config/rs6000/rs6000.opt (mpower8-internal): New.

    gcc/testsuite/
            PR target/101865
            * gcc.target/powerpc/predefine-p7-novsx.c: New test.
            * gcc.target/powerpc/predefine-p8-noaltivec-novsx.c: New test.
            * gcc.target/powerpc/predefine-p8-noaltivec.c: New test.
            * gcc.target/powerpc/predefine-p8-novsx.c: New test.
            * gcc.target/powerpc/predefine-p8-pragma-vsx.c: New test.
            * gcc.target/powerpc/predefine-p9-novsx.c: New test.

    (cherry picked from commit aa57af93ba22865be747f926e4e5f219e7f8758a)=