[Bug c/100419] New: Arm: arm_mve.h generates warning when compiled with -Wsystem-headers.

[sripar01 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100419

            Bug ID: 100419
           Summary: Arm: arm_mve.h generates warning when compiled with
                    -Wsystem-headers.
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sripar01 at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64
            Target: arm

On compiling following testcase using -Wsystem-headers options, generates lot
of warnings related to redefined macros in header file "arm_mve.h"

$ cat bug.c
#include "arm_mve.h"

$arm-none-eabi-gcc  -mcpu=cortex-m55+nofp -mfloat-abi=hard bug.c
-Wsystem-headers -c

In file included from bug.c:1:
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:38868:
warning: "__arm_vcmpneq" redefined
38868 | #define __arm_vcmpneq(p0,p1) ({ __typeof(p0) __p0 = (p0); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:38416:
note: this is the location of the previous definition
38416 | #define __arm_vcmpneq(p0,p1) ({ __typeof(p0) __p0 = (p0); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:39990:
warning: "__arm_vstrwq_scatter_offset_p" redefined
39990 | #define __arm_vstrwq_scatter_offset_p(p0,p1,p2,p3) ({ __typeof(p1) __p1
= (p1); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:39984:
note: this is the location of the previous definition
39984 | #define __arm_vstrwq_scatter_offset_p(p0,p1,p2,p3) ({ __typeof(p1) __p1
= (p1); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:41625:
warning: "__arm_vmaxq_x" redefined
41625 | #define __arm_vmaxq_x(p1,p2,p3) ({ __typeof(p1) __p1 = (p1); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:40157:
note: this is the location of the previous definition
40157 | #define __arm_vmaxq_x(p1,p2,p3) ({ __typeof(p1) __p1 = (p1); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:41807:
warning: "__arm_vmlsdavaq" redefined
41807 | #define __arm_vmlsdavaq(p0,p1,p2) ({ __typeof(p0) __p0 = (p0); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:39402:
note: this is the location of the previous definition
39402 | #define __arm_vmlsdavaq(p0,p1,p2) ({ __typeof(p0) __p0 = (p0); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:41815:
warning: "__arm_vmlsdavaxq" redefined
41815 | #define __arm_vmlsdavaxq(p0,p1,p2) ({ __typeof(p0) __p0 = (p0); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:39394:
note: this is the location of the previous definition
39394 | #define __arm_vmlsdavaxq(p0,p1,p2) ({ __typeof(p0) __p0 = (p0); \

/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:41830:
warning: "__arm_vmlsdavq_p" redefined
41830 | #define __arm_vmlsdavq_p(p0,p1,p2) ({ __typeof(p0) __p0 = (p0); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:39384:
note: this is the location of the previous definition
39384 | #define __arm_vmlsdavq_p(p0,p1,p2) ({ __typeof(p0) __p0 = (p0); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:41844:
warning: "__arm_vmlsdavxq_p" redefined
41844 | #define __arm_vmlsdavxq_p(p0,p1,p2) ({ __typeof(p0) __p0 = (p0); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:39374:
note: this is the location of the previous definition
39374 | #define __arm_vmlsdavxq_p(p0,p1,p2) ({ __typeof(p0) __p0 = (p0); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:41945:
warning: "__arm_vrmlaldavhaq" redefined
41945 | #define __arm_vrmlaldavhaq(p0,p1,p2) ({ __typeof(p0) __p0 = (p0); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:39364:
note: this is the location of the previous definition
39364 | #define __arm_vrmlaldavhaq(p0,p1,p2) ({ __typeof(p0) __p0 = (p0); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:41991:
warning: "__arm_vstrbq_p" redefined
41991 | #define __arm_vstrbq_p(p0,p1,p2) ({ __typeof(p1) __p1 = (p1); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:39742:
note: this is the location of the previous definition
39742 | #define __arm_vstrbq_p(p0,p1,p2) ({ __typeof(p0) __p0 = (p0); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:42000:
warning: "__arm_vstrbq_scatter_offset" redefined
42000 | #define __arm_vstrbq_scatter_offset(p0,p1,p2) ({ __typeof(p1) __p1 =
(p1); \
      |
/media/sripar01/2tb_work/embedded_toolchain/gcc-arm-none-eabi-10-2020-q4-major/lib/gcc/arm-none-eabi/10.2.1/include/arm_mve.h:39717:
note: this is the location of the previous definition
39717 | #define __arm_vstrbq_scatter_offset(p0,p1,p2) ({ __typeof(p0) __p0 =
(p0); \
...

$arm-none-eabi-gcc -v
Using built-in specs.
COLLECT_GCC=/arm/pdtl/builds/latest-fsf-trunk/installed/cen7x86_64/arm-none-eabi/bin/arm-none-eabi-gcc
COLLECT_LTO_WRAPPER=/arm/pdtl/builds/fsf-trunk.2464/installed/cen7x86_64/arm-none-eabi/bin/../libexec/gcc/arm-none-eabi/12.0.0/lto-wrapper
Target: arm-none-eabi
Configured with:
/data/dgboter/bbs/build21--cen7x86_64/buildbot/cen7x86_64--arm-none-eabi--all-profiles/build/src/gcc/configure
--target=arm-none-eabi
--prefix=/data/dgboter/bbs/build21--cen7x86_64/buildbot/cen7x86_64--arm-none-eabi--all-profiles/build/build-arm-none-eabi/install//
--with-gmp=/data/dgboter/bbs/build21--cen7x86_64/buildbot/cen7x86_64--arm-none-eabi--all-profiles/build/build-arm-none-eabi/host-tools
--with-mpfr=/data/dgboter/bbs/build21--cen7x86_64/buildbot/cen7x86_64--arm-none-eabi--all-profiles/build/build-arm-none-eabi/host-tools
--with-mpc=/data/dgboter/bbs/build21--cen7x86_64/buildbot/cen7x86_64--arm-none-eabi--all-profiles/build/build-arm-none-eabi/host-tools
--with-isl=/data/dgboter/bbs/build21--cen7x86_64/buildbot/cen7x86_64--arm-none-eabi--all-profiles/build/build-arm-none-eabi/host-tools
--disable-shared --disable-nls --disable-threads --disable-tls
--enable-checking=yes --enable-languages=c,c++,fortran --with-newlib
--with-multilib-list=aprofile,rmprofile --with-pkgversion=fsf-trunk.2464
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20210426 (experimental)