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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/99464] New: #pragma GCC target("arch=cannonlake") does
 not work with a -msha builtin
Date: Mon, 08 Mar 2021 11:54:06 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99464

            Bug ID: 99464
           Summary: #pragma GCC target("arch=3Dcannonlake") 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=3Dcannonlake")

#include <immintrin.h>

volatile __m128i x;

void extern
sha_test (void)
{
  x =3D _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 =E2=80=98sha_test=E2=80=99:
/home/marxin/bin/gcc/lib64/gcc/x86_64-pc-linux-gnu/11.0.1/include/shaintrin=
.h:41:20:
error: =E2=80=98__builtin_ia32_sha1msg1=E2=80=99 needs isa option -msha
   41 |   return (__m128i) __builtin_ia32_sha1msg1 ((__v4si) __A, (__v4si)
__B);
      |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~=
~~~~

I've got patch for it.=