gcc/testsuite/gcc.dg/vect/vect-early-break_109-pr113588.c

   1 /* { dg-add-options vect_early_break } */
   2 /* { dg-require-effective-target vect_early_break } */
   3 /* { dg-require-effective-target vect_int } */
   4 /* { dg-require-effective-target mmap } */
   5
   6 /* { dg-final { scan-tree-dump-not "LOOP VECTORIZED" "vect" } } */
   7
   8 #include <sys/mman.h>
   9 #include <unistd.h>
  10
  11 #include "tree-vect.h"
  12
  13 __attribute__((noipa))
  14 int foo (const char *s, unsigned long n)
  15 {
  16  unsigned long len = 0;
  17  while (*s++ && n--)
  18    ++len;
  19  return len;
  20 }
  21
  22 int main()
  23 {
  24
  25   check_vect ();
  26
  27   long pgsz = sysconf (_SC_PAGESIZE);
  28   void *p = mmap (NULL, pgsz * 3, PROT_READ|PROT_WRITE,
  29      MAP_ANONYMOUS|MAP_PRIVATE, 0, 0);
  30   if (p == MAP_FAILED)
  31     return 0;
  32   mprotect (p, pgsz, PROT_NONE);
  33   mprotect (p+2*pgsz, pgsz, PROT_NONE);
  34   char *p1 = p + pgsz;
  35   p1[0] = 1;
  36   p1[1] = 0;
  37   foo (p1, 1000);
  38   p1 = p + 2*pgsz - 2;
  39   p1[0] = 1;
  40   p1[1] = 0;
  41   foo (p1, 1000);
  42   return 0;
  43 }
  44