gcc/testsuite/gcc.dg/vect/vect-80-big-array.c

   1 /* { dg-require-effective-target vect_float } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 128
   7
   8 float fa[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   9 float fb[N+4] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  10 float fc[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  11
  12 /* Check handling of accesses for which the "initial condition" -
  13    the expression that represents the first location accessed - is
  14    more involved than just an ssa_name.  */
  15
  16 __attribute__ ((noinline)) int
  17 main1 (float * __restrict__ pa, float * __restrict__ pb, float *__restrict__ pc)
  18 {
  19   int i;
  20   float *q = pb + 4;
  21   for (i = 0; i < N; i++)
  22     {
  23       fb[i] = i;
  24       fc[i] = 0.5+i;
  25       asm volatile ("" ::: "memory");
  26     }
  27   for (; i < N+4; i++)
  28     {
  29       fb[i] = i;
  30       asm volatile ("" ::: "memory");
  31     }
  32
  33   for (i = 0; i < N; i++)
  34     {
  35       pa[i] = q[i] * pc[i];
  36     }
  37
  38   for (i = 0; i < N; i++)
  39     {
  40       if (pa[i] != q[i] * pc[i])
  41         abort ();
  42     }
  43
  44   return 0;
  45 }
  46
  47
  48 int main (void)
  49 {
  50   check_vect ();
  51
  52   main1 (fa, fb, fc);
  53
  54   return 0;
  55 }
  56
  57 /* For targets that don't support misaligned loads we version for the
  58    all three accesses (peeling to align the store will not force the
  59    two loads to be aligned).  */
  60
  61 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  62 /* Uncomment when this testcase gets vectorized again:
  63  dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail vect_no_align } }
  64  dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail vect_no_align } }
  65  dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 3 "vect" { target vect_no_align } }
  66 */