gcc/testsuite/gcc.dg/Wstrict-overflow-11.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-fstrict-overflow -O2 -Wstrict-overflow=1" } */
   3
   4 /* Based on strict-overflow-5.c.  */
   5
   6 /* We can only unroll when using strict overflow semantics.  But we
   7    don't issue a warning for relying on undefined overflow in
   8    loops.  */
   9
  10 int foo (int i)
  11 {
  12   int index;
  13   int r=0;
  14
  15   for (index = i; index <= i+4; index+=2)
  16     r++;
  17
  18   return r;
  19 }