gcc/testsuite/gcc.dg/Wstrict-overflow-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-fstrict-overflow -O2 -Wstrict-overflow=3" } */
   3
   4 /* Source: Ian Lance Taylor.  Based on strict-overflow-1.c.  */
   5
   6 /* We can only simplify the conditional when using strict overflow
   7    semantics.  */
   8
   9 int
  10 foo (int i)
  11 {
  12   return i - 5 < 10; /* { dg-warning "assuming signed overflow does not occur" "correct warning" } */
  13 }