1  /* { dg-do run { target { powerpc*-*-* && vmx_hw } } } */
       2  /* { dg-options "-O2 -funroll-loops -ffast-math -fvariable-expansion-in-unroller -maltivec -fdump-rtl-loop2_unroll" } */
       3  
       4  #include "altivec.h"
       5  extern void abort (void);
       6  extern void exit (int);
       7  
       8  #define N 256
       9  
      10  float in1[N] __attribute__ ((__aligned__ (16))) = {0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57};
      11  float in2[N] __attribute__ ((__aligned__ (16))) = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19};
      12  
      13  float
      14  foo (int n)
      15  {
      16    unsigned i;
      17    vector float vp1, vp2, vp3, vaccum, vzero, vtmp;
      18    float accum = 1.0;
      19  
      20    vzero = (vector float){0, 0, 0, 0};
      21  
      22    vaccum = vzero;
      23  
      24    for (i = 0; i < n; i++)
      25      {
      26        vp1 = vec_ld (i * 16, in1);
      27        vp2 = vec_ld (i * 16, in2);
      28  
      29        vaccum = vec_madd (vp1, vp2, vaccum);
      30  
      31      }
      32    vtmp = vec_sld (vaccum, vaccum, 8);
      33    vp1 = vec_add (vaccum, vtmp);
      34    vtmp = vec_sld (vp1, vp1, 4);
      35    vp2 = vec_add (vp1, vtmp);
      36  
      37    vec_ste (vp2, 0, &accum);
      38    if (accum != 1518)
      39      return 0;
      40   
      41    return accum;
      42  }
      43  
      44  int
      45  main (void)
      46  {
      47    if (!foo (3))
      48      abort ();
      49  
      50     exit (0);
      51  }
      52  
      53  /* { dg-final { scan-rtl-dump "Expanding Accumulator" "loop2_unroll" } } */
      54  
      55  
      56  
      57