gcc/testsuite/gcc.dg/Wstrict-overflow-3.c

/* { dg-do compile } */
/* { dg-options "-fstrict-overflow -O2 -Wstrict-overflow=4" } */

/* Source: Ian Lance Taylor.  Based on strict-overflow-2.c.  */

/* We can only simplify the division when using strict overflow
   semantics.  */

int
foo (int i)
{
  return (i * 100) / 10; /* { dg-warning "assuming signed overflow does not occur" "correct warning" } */
}