[Bug middle-end/31307] Interaction between x86_64 builtin function and inline functions causes poor code

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2007-04-10 14:37 -------
Reduced testcase:

typedef long long __m128i __attribute__ ((__vector_size__ (16),
__may_alias__));
typedef long long __v2di __attribute__ ((__vector_size__ (16)));
typedef char __v16qi __attribute__ ((__vector_size__ (16)));

union __attribute__((aligned(16))) MY_M128
{
  __m128i i;
};

struct RegFile
{
  MY_M128 dst[4];
};

__inline__ __attribute__((always_inline)) static void
MEM_OPT_LOAD(MY_M128* reg, __m128i* mem)
{
  reg[0].i = *mem;
}

__inline__ __attribute__((always_inline)) static void
MEM_OPT_STORE(MY_M128* reg, __m128i* mem)
{
  __builtin_ia32_movntdq ((__v2di *)mem, (__v2di)reg[0].i);
}

static __inline __m128i __attribute__((__always_inline__))
_mm_adds_epu8 (__m128i __A, __m128i __B)
{
  return (__m128i)__builtin_ia32_paddusb128 ((__v16qi)__A, (__v16qi)__B);
}

int test(unsigned char *d)
{
  RegFile r;
  MEM_OPT_LOAD((r.dst) , ((__m128i*) d));
  r.dst[0].i = _mm_adds_epu8(r.dst[0].i, r.dst[0].i);
  MEM_OPT_STORE((r.dst), (__m128i*) d);
  return 0;
}


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-04-10 14:37:48
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31307