gcc/testsuite/gcc.dg/pointer-range-check-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fno-ipa-icf -fwrapv-pointer -fdump-tree-optimized" } */
   3
   4 _Bool
   5 f1 (char *a, char *b)
   6 {
   7   return (a + 16 <= b) || (b + 16 <= a);
   8 }
   9
  10 _Bool
  11 f2 (char *a, char *b)
  12 {
  13   return (a + 15 < b) || (b + 15 < a);
  14 }
  15
  16 _Bool
  17 f3 (char *a, char *b)
  18 {
  19   return (a + 16 <= b) | (b + 16 <= a);
  20 }
  21
  22 _Bool
  23 f4 (char *a, char *b)
  24 {
  25   return (a + 15 < b) | (b + 15 < a);
  26 }
  27
  28 /* { dg-final { scan-tree-dump-not { = [^\n]* - [^\n]*;} "optimized" } } */
  29 /* { dg-final { scan-tree-dump-times { = [^\n]* \+ [^\n]*;} 8 "optimized" } } */
  30 /* { dg-final { scan-tree-dump-times { \+ 15} 4 "optimized" } } */
  31 /* { dg-final { scan-tree-dump-times { \+ 16} 4 "optimized" } } */