gcc/testsuite/gcc.dg/vect/vect-112-big-array.c

   1 /* { dg-require-effective-target vect_int } */
   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 char cb[N];
  10 char cc[N];
  11
  12 __attribute__ ((noinline)) int
  13 main1 (void)
  14 {
  15   int i;
  16   int diff = 0;
  17   int check_diff = 0;
  18   for (i = 0; i < N; i++) {
  19     cb[i] = i + 2;
  20     cc[i] = i + 1;
  21     check_diff += (cb[i] - cc[i]);
  22     asm volatile ("" ::: "memory");
  23   }
  24
  25   /* Cross-iteration cycle.  */
  26   diff = 0;
  27   for (i = 0; i < N; i++) {
  28     diff += (cb[i] - cc[i]);
  29   }
  30
  31   /* Check results.  */
  32   if (diff != check_diff)
  33     abort ();
  34
  35   return 0;
  36 }
  37
  38 int main (void)
  39 {
  40   check_vect ();
  41   return main1 ();
  42 }
  43
  44 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_unpack } } } */
  45
  46
  47 /* { dg-final { scan-tree-dump-not "Invalid sum" "optimized" } } */