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Date: Fri, 01 Oct 2004 13:32:00 -0000
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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
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Reply-To: gcc-bugzilla@gcc.gnu.org
Subject: [Bug target/17767] [3.4/4.0 Regression] MMX intrinsics cause internal compiler error
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X-SW-Source: 2004-10/txt/msg00059.txt.bz2
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------- Additional Comments From pinskia at gcc dot gnu dot org  2004-10-01 13:32 -------
: Search converges between 2004-01-01-trunk (#437) and 2004-01-17-trunk (#438).

Confirmed, a regression from 3.3.3.
Self contained example:
typedef int __m64 __attribute__ ((vector_size (8)));


typedef int __v2si __attribute__ ((vector_size (8)));
typedef short __v4hi __attribute__ ((vector_size (8)));
typedef char __v8qi __attribute__ ((vector_size (8)));

static __inline __m64
_mm_subs_pi16 (__m64 __m1, __m64 __m2)
{
  return (__m64) __builtin_ia32_psubsw ((__v4hi)__m1, (__v4hi)__m2);
}
static __inline __m64
_m_psubsw (__m64 __m1, __m64 __m2)
{
  return _mm_subs_pi16 (__m1, __m2);
}
static __inline __m64
_mm_cmpeq_pi16 (__m64 __m1, __m64 __m2)
{
  return (__m64) __builtin_ia32_pcmpeqw ((__v4hi)__m1, (__v4hi)__m2);
}
static __inline __m64
_m_pcmpeqw (__m64 __m1, __m64 __m2)
{
  return _mm_cmpeq_pi16 (__m1, __m2);
}
void bar()
{
  for (int i=0;i<4;i++)
{
  __m64 m2, m3, m5;
  m3 = _m_pcmpeqw(m3,m3);
  m2 = _m_psubsw(m2,m5);
  m5 = _m_psubsw(m5,m3);
  *((__m64*)0) = m2;
}
}

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
      Known to fail|                            |4.0.0 3.4.0
      Known to work|                            |3.3.3
   Last reconfirmed|0000-00-00 00:00:00         |2004-10-01 13:32:32
               date|                            |
            Summary|MMX intrinsics cause        |[3.4/4.0 Regression] MMX
                   |internal compiler error     |intrinsics cause internal
                   |                            |compiler error
   Target Milestone|---                         |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17767