1  /* { dg-do run } */
       2  /* { dg-require-effective-target vect_double } */
       3  /* { dg-require-effective-target vsx_hw { target { powerpc*-*-* } } } */
       4  /* { dg-require-effective-target sse2_runtime { target { i?86-*-* x86_64-*-* } } } */
       5  /* { dg-options "-O2 -ffast-math -fdump-tree-reassoc1" } */
       6  /* { dg-additional-options "-mvsx" { target { powerpc*-*-* } } } */
       7  /* { dg-additional-options "-msse2" { target { i?86-*-* x86_64-*-* } } } */
       8  
       9  /* To test reassoc can undistribute vector bit_field_ref summation.
      10  
      11     arg1 and arg2 are two arrays whose elements of type vector double.
      12     Assuming:
      13       A0 = arg1[0], A1 = arg1[1], A2 = arg1[2], A3 = arg1[3],
      14       B0 = arg2[0], B1 = arg2[1], B2 = arg2[2], B3 = arg2[3],
      15  
      16     Then:
      17       V0 = A0 * B0, V1 = A1 * B1, V2 = A2 * B2, V3 = A3 * B3,
      18  
      19     reassoc transforms
      20  
      21       accumulator += V0[0] + V0[1] + V1[0] + V1[1] + V2[0] + V2[1]
      22            + V3[0] + V3[1];
      23  
      24     into:
      25  
      26       T = V0 + V1 + V2 + V3
      27       accumulator += T[0] + T[1];
      28  
      29     Fewer bit_field_refs, only two for 128 or more bits vector.  */
      30  
      31  typedef double v2df __attribute__ ((vector_size (16)));
      32  __attribute__ ((noinline)) double
      33  test (double accumulator, v2df arg1[], v2df arg2[])
      34  {
      35    v2df temp;
      36    temp = arg1[0] * arg2[0];
      37    accumulator += temp[0] + temp[1];
      38    temp = arg1[1] * arg2[1];
      39    accumulator += temp[0] + temp[1];
      40    temp = arg1[2] * arg2[2];
      41    accumulator += temp[0] + temp[1];
      42    temp = arg1[3] * arg2[3];
      43    accumulator += temp[0] + temp[1];
      44    return accumulator;
      45  }
      46  
      47  extern void abort (void);
      48  
      49  int
      50  main ()
      51  {
      52    v2df v2[4] = {{1.0, 2.0}, {4.0, 8.0}, {1.0, 3.0}, {9.0, 27.0}};
      53    v2df v3[4] = {{1.0, 4.0}, {16.0, 64.0}, {1.0, 2.0}, {3.0, 4.0}};
      54    double acc = 100.0;
      55    double res = test (acc, v2, v3);
      56    if (res != 827.0)
      57      abort ();
      58    return 0;
      59  }
      60  /* { dg-final { scan-tree-dump-times "BIT_FIELD_REF" 2 "reassoc1" { target { powerpc*-*-* i?86-*-* x86_64-*-* } } } } */