gcc/testsuite/gcc.dg/pr36227.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -Wstrict-overflow=3" } */
   3 #if (__SIZEOF_LONG_LONG__ == __SIZEOF_POINTER__)
   4 typedef unsigned long long ptrcast;
   5 #elif (__SIZEOF_LONG__ == __SIZEOF_POINTER__)
   6 typedef unsigned long ptrcast;
   7 #elif (__SIZEOF_INT__ == __SIZEOF_POINTER__)
   8 typedef unsigned int ptrcast;
   9 #else
  10 #error Add target support here
  11 #endif
  12
  13 volatile unsigned long *
  14 sat_add(volatile unsigned long *ptr, unsigned long i, volatile unsigned long *end)
  15 {
  16   if ((ptrcast)ptr + i * sizeof(*ptr) > (ptrcast)ptr) /* { dg-bogus "pointer wraparound" } */
  17     return ptr + i;
  18   else
  19     return end;
  20 }
  21
  22