[Bug target/34435] [4.3 Regression] SSE2 intrinsics - emmintrin with optimisations off and type conversion error

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2007-12-12 09:55 -------
Without optimization main() preprocesses to

int main() {
    ((__m128i)__builtin_ia32_pshufd ((__v4si)Vec(5), (((3) << 6) | ((3) << 4) |
((3) << 2) | (3))));
}


with optimization we get instead

int main() {
    _mm_shuffle_epi32(Vec(5), (((3) << 6) | ((3) << 4) | ((3) << 2) | (3)));
}

because with optimization we use an inline function instead of a macro.

Uros - it was you who changed that (and I see it may not be too easy to
make all parties happy here).  My suggestion is to force the same "argument"
type by doing

#define _mm_shuffle_epi32(__A, __B) \
  ((__m128i)__builtin_ia32_pshufd ((__v4si)(__m128i)__A, (int)__B))

instead of

#define _mm_shuffle_epi32(__A, __B) \
  ((__m128i)__builtin_ia32_pshufd ((__v4si)__A, __B))

to match the prototype of _mm_shuffle_epi32 which reads

static __inline __m128i __attribute__((__always_inline__, __artificial__))
_mm_shuffle_epi32 (__m128i __A, const int __mask)
{ 
  return (__m128i)__builtin_ia32_pshufd ((__v4si)__A, __mask);
}

and adjust all !__OPTIMIZE__ macro variants this way.  (at least this makes
this testcase work properly)


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |uros at gcc dot gnu dot org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |rejects-valid
   Last reconfirmed|0000-00-00 00:00:00         |2007-12-12 09:55:10
               date|                            |
            Summary|SSE2 intrinsics - emmintrin |[4.3 Regression] SSE2
                   |with optimisations off and  |intrinsics - emmintrin with
                   |type conversion error       |optimisations off and type
                   |                            |conversion error
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34435