[Bug target/115713] rs6000: Miss warning for incompatible no-altivec and vsx in target attribute

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115713

--- Comment #8 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Kewen Lin <linkw@gcc.gnu.org>:

https://gcc.gnu.org/g:e6db8848d956f5e712dd621d33630b799ff60a72

commit r15-2215-ge6db8848d956f5e712dd621d33630b799ff60a72
Author: Kewen Lin <linkw@linux.ibm.com>
Date:   Tue Jul 23 00:48:00 2024 -0500

    rs6000: Consider explicitly set options in target option parsing [PR115713]

    In rs6000_inner_target_options, when enabling VSX we enable
    altivec and disable -mavoid-indexed-addresses implicitly,
    but it doesn't consider the case that the options altivec
    and avoid-indexed-addresses can be explicitly disabled.  As
    the test case in PR115713#c1 shows, with target attribute
    "no-altivec,vsx", it results in that VSX unexpectedly set
    altivec flag and there isn't an expected error.

    This patch is to avoid the automatic enablement when they
    are explicitly specified.  With this change, an existing
    test case ppc-target-4.c also requires an adjustment by
    specifying explicit altivec in target attribute (since it
    requires altivec feature and command line is specifying
    no-altivec).

            PR target/115713

    gcc/ChangeLog:

            * config/rs6000/rs6000.cc (rs6000_inner_target_options): Avoid to
            enable altivec or disable avoid-indexed-addresses automatically
            when they get specified explicitly.

    gcc/testsuite/ChangeLog:

            * gcc.target/powerpc/pr115713-1.c: New test.
            * gcc.target/powerpc/ppc-target-4.c: Adjust by specifying altivec
            in target attribute.