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

   1 /* { dg-require-effective-target vect_float } */
   2 /* { dg-additional-options "-fdump-tree-optimized-details-blocks" } */
   3
   4 #include <stdarg.h>
   5 #include "tree-vect.h"
   6
   7 #define N 128
   8
   9 float fa[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  10 float fb[N+4] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  11 float fc[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  12
  13 /* Check handling of accesses for which the "initial condition" -
  14    the expression that represents the first location accessed - is
  15    more involved than just an ssa_name.  */
  16
  17 __attribute__ ((noinline)) int
  18 main1 (float * __restrict__ pa, float * __restrict__ pb, float *__restrict__ pc)
  19 {
  20   int i;
  21   float *q = pb + 4;
  22   for (i = 0; i < N; i++)
  23     {
  24       fb[i] = i;
  25       fc[i] = 0.5+i;
  26       asm volatile ("" ::: "memory");
  27     }
  28   for (; i < N+4; i++)
  29     {
  30       fb[i] = i;
  31       asm volatile ("" ::: "memory");
  32     }
  33
  34   for (i = 0; i < N; i++)
  35     {
  36       pa[i] = q[i] * pc[i];
  37     }
  38
  39 #pragma GCC novector
  40   for (i = 0; i < N; i++)
  41     {
  42       if (pa[i] != q[i] * pc[i])
  43         abort ();
  44     }
  45
  46   return 0;
  47 }
  48
  49
  50 int main (void)
  51 {
  52   check_vect ();
  53
  54   main1 (fa, fb, fc);
  55
  56   return 0;
  57 }
  58
  59 /* For targets that don't support misaligned loads we version for the
  60    all three accesses (peeling to align the store will not force the
  61    two loads to be aligned).  */
  62
  63 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  64 /* Uncomment when this testcase gets vectorized again:
  65  dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail vect_no_align } }
  66  dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail vect_no_align } }
  67  dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 3 "vect" { target vect_no_align } }
  68 */
  69 /* { dg-final { scan-tree-dump-not "Invalid sum" "optimized" } } */