[Bug target/97327] -mcpu=cortex-m55 warns without -mfloat-abi=hard or -march=armv8.1-m.main

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97327

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by SRINATH PARVATHANENI
<sripa...@gcc.gnu.org>:

https://gcc.gnu.org/g:634ee90804cae1e08c8e25913288e0ecf0a5ea0a

commit r10-8911-g634ee90804cae1e08c8e25913288e0ecf0a5ea0a
Author: Srinath Parvathaneni <srinath.parvathan...@arm.com>
Date:   Fri Oct 16 14:53:28 2020 +0100

    arm: Fix the warning -mcpu=cortex-m55 conflicting with
-march=armv8.1-m.main (pr97327).

    This patch fixes (PR97327) the warning -mcpu=cortex-m55 conflicts with
-march=armv8.1-m.main
    for -mfloat-abi=soft by adding the isa_bit_mve_float to clearing FP bit
list.

    The following combination are fixed with this patch:
    $ cat bug.c
    int main(){
    return 0;
    }

    $ arm-none-eabi-gcc -mcpu=cortex-m55 -mfloat-abi=soft bug.c -c
    $ arm-none-eabi-gcc -mcpu=cortex-m55 -mfloat-abi=soft
-march=armv8.1-m.main+mve bug.c -c

    Before this patch for above combinations:
    cc1: warning: switch '-mcpu=cortex-m55' conflicts with
'-march=armv8.1-m.main' switch

    After this patch for above combinations no warning/errors.

    gcc/ChangeLog:

    2020-10-16  Srinath Parvathaneni  <srinath.parvathan...@arm.com>

            PR target/97327
            * config/arm/arm.c (fp_bitlist): Add isa_bit_mve_float to FP bits
array.

    gcc/testsuite/ChangeLog:

            PR target/97327
            * gcc.target/arm/mve/intrinsics/pr97327.c: New test.

    (cherry picked from commit 90042c43a92c452a5f9f3afbfcdad511ea09a54f)