gcc/testsuite/gcc.dg/tree-ssa/pr79943.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -fsplit-loops -fdump-tree-lsplit-details" } */
   3 /* { dg-require-effective-target int32plus } */
   4
   5 #ifdef __cplusplus
   6 extern "C" void abort (void);
   7 #else
   8 extern void abort (void);
   9 #endif
  10
  11 typedef struct {
  12   int n;
  13 } region_t;
  14
  15 void set (region_t *region) __attribute__((noinline));
  16 void doit (region_t *beg, region_t *end, region_t *limit)
  17   __attribute__((noinline));
  18
  19 region_t regions[10];
  20
  21 void
  22 set (region_t *region) {
  23   region->n = 1;
  24 }
  25
  26 void
  27 doit (region_t *beg, region_t *end, region_t *limit) {
  28   for (region_t *cur = beg; cur < end; cur++) {
  29     if (cur < limit) {
  30       set(cur);
  31     }
  32   }
  33 }
  34
  35 int
  36 main (void) {
  37   doit(&regions[0], &regions[2], &regions[10]);
  38   if (regions[1].n != 1)
  39     abort();
  40 }