gcc/testsuite/gcc.dg/vect/vect-live-4.c

   1 /* Disabling epilogues until we find a better way to deal with scans.  */
   2 /* { dg-additional-options "--param vect-epilogues-nomask=0" } */
   3 /* { dg-require-effective-target vect_int } */
   4
   5 #include "tree-vect.h"
   6
   7 /* Statement used outside the loop, not used inside the loop.  SCEV cannot
   8   hoist the stmt.  */
   9 __attribute__ ((noinline)) int
  10 liveloop (int n, int *x, int *y)
  11 {
  12   int i;
  13   int ret;
  14
  15   for (i = 0; i < n; ++i)
  16     {
  17       ret = x[i] + 5;
  18       y[i] = ret;
  19     }
  20   return ret;
  21 }
  22
  23 #define MAX 273
  24
  25 int
  26 main (void)
  27 {
  28   int a[MAX];
  29   int b[MAX];
  30   int i;
  31
  32   check_vect ();
  33
  34   for (i=0; i<MAX; i++)
  35     {
  36       __asm__ volatile ("");
  37       a[i] = i;
  38     }
  39
  40   int ret = liveloop (MAX, a, b);
  41
  42   if (ret != MAX + 4)
  43     abort ();
  44
  45 #pragma GCC novector
  46   for (i=0; i<MAX; i++)
  47     {
  48       __asm__ volatile ("");
  49       if (b[i] != i+5)
  50         abort ();
  51     }
  52 }
  53
  54 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  55 /* { dg-final { scan-tree-dump-times "vec_stmt_relevant_p: stmt live but not relevant" 1 "vect" } } */