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[Bug target/51968] gcc trunk (ARM) ICEs in final_scan_insn in final.c:2716, with "could not split insn" error msg


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51968

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-23 21:51:20 UTC ---
Reduced testcase:

/* PR target/51968 */
/* { dg-do compile } */
/* { dg-options "-O2 -march=armv7-a -mfloat-abi=softfp -mfpu=neon" } */
/* { dg-require-effective-target arm_neon_ok } */

typedef __builtin_neon_qi int8x8_t __attribute__ ((__vector_size__ (8)));
typedef __builtin_neon_uqi uint8x8_t __attribute__ ((__vector_size__ (8)));
typedef __builtin_neon_qi int8x16_t __attribute__ ((__vector_size__ (16)));
typedef __builtin_neon_hi int16x8_t __attribute__ ((__vector_size__ (16)));
typedef __builtin_neon_si int32x4_t __attribute__ ((__vector_size__ (16)));
struct T { int8x8_t val[2]; };
int y;

void
foo (int8x8_t z, int8x8_t x, int16x8_t b, int8x8_t n)
{
  if (y)
    {
      struct T m;
      __builtin_neon_vuzpv8qi (&m.val[0], z, x);
    }
  for (;;)
    {
      int8x16_t g;
      int8x8_t h, j, k;
      struct T m;
      j = __builtin_neon_vqmovunv8hi (b, 1);
      g = __builtin_neon_vcombinev8qi (j, h);
      k = __builtin_neon_vget_lowv16qi (g);
      __builtin_neon_vuzpv8qi (&m.val[0], k, n);
    }
}


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