[Bug target/70010] powerpc: -flto forgets 'no-vsx' function attributes

[guojiufu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70010

--- Comment #9 from Jiu Fu Guo <guojiufu at gcc dot gnu.org> ---
Author: guojiufu
Date: Mon Oct 28 09:46:15 2019
New Revision: 277506

URL: https://gcc.gnu.org/viewcvs?rev=277506&root=gcc&view=rev
Log:
[rs6000] PR70010, avoid no-vsx function to be inlined to vsx function

In PR70010, a function is marked with target(no-vsx) to disable VSX code
generation.  To avoid VSX code generation, this function should not be
inlined into VSX function.  To fix the bug, in the current logic when
checking whether the caller's ISA flags supports the callee's ISA flags, we
just need to add a test that enforces that the caller's ISA flags match
exactly the callee's flags, for those flags that were explicitly set in the
callee.  If caller without target attribute then using options from command
line.

Jiufu
BR


gcc/
2019-10-16  Peter Bergner <bergner@linux.ibm.com>
            Jiufu Guo  <guojiufu@linux.ibm.com>

        PR target/70010
        * config/rs6000/rs6000.c (rs6000_can_inline_p): Prohibit inlining if
        the callee explicitly disables some isa_flags the caller is using.

gcc.testsuite/
2019-10-16  Peter Bergner <bergner@linux.ibm.com>
            Jiufu Guo  <guojiufu@linux.ibm.com>

        PR target/70010
        * gcc.target/powerpc/pr70010.c: New test.
        * gcc.target/powerpc/pr70010-1.c: New test.
        * gcc.target/powerpc/pr70010-2.c: New test.
        * gcc.target/powerpc/pr70010-3.c: New test.
        * gcc.target/powerpc/pr70010-4.c: New test.



Added:
    branches/gcc-9-branch/gcc/testsuite/gcc.target/powerpc/pr70010-1.c
    branches/gcc-9-branch/gcc/testsuite/gcc.target/powerpc/pr70010-2.c
    branches/gcc-9-branch/gcc/testsuite/gcc.target/powerpc/pr70010-3.c
    branches/gcc-9-branch/gcc/testsuite/gcc.target/powerpc/pr70010-4.c
    branches/gcc-9-branch/gcc/testsuite/gcc.target/powerpc/pr70010.c
Modified:
    branches/gcc-9-branch/gcc/ChangeLog
    branches/gcc-9-branch/gcc/config/rs6000/rs6000.c
    branches/gcc-9-branch/gcc/testsuite/ChangeLog