[Bug target/99464] New: #pragma GCC target("arch=cannonlake") does not work with a -msha builtin

["marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99464

            Bug ID: 99464
           Summary: #pragma GCC target("arch=cannonlake") does not work
                    with a -msha builtin
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-linux-gnu

The following does not work:

$ cat pragma.c
#pragma GCC target("arch=cannonlake")

#include <immintrin.h>

volatile __m128i x;

void extern
sha_test (void)
{
  x = _mm_sha1msg1_epu32 (x, x);
}

$ gcc pragma.c -c
In file included from
/home/marxin/bin/gcc/lib64/gcc/x86_64-pc-linux-gnu/11.0.1/include/immintrin.h:97,
                 from pragma.c:3:
/home/marxin/bin/gcc/lib64/gcc/x86_64-pc-linux-gnu/11.0.1/include/shaintrin.h:
In function ‘sha_test’:
/home/marxin/bin/gcc/lib64/gcc/x86_64-pc-linux-gnu/11.0.1/include/shaintrin.h:41:20:
error: ‘__builtin_ia32_sha1msg1’ needs isa option -msha
   41 |   return (__m128i) __builtin_ia32_sha1msg1 ((__v4si) __A, (__v4si)
__B);
      |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

I've got patch for it.