gcc/testsuite/gcc.dg/overflow-warn-6.c

   1 /* Test non-constant operands in overflowed expressions.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-std=c99 -Woverflow" } */
   4
   5 #include <limits.h>
   6
   7 int
   8 h1 (int x)
   9 {
  10   return x * (0 * (INT_MAX + 1)); /* { dg-warning "integer overflow in expression" } */
  11 }
  12
  13 int
  14 h2 (int x)
  15 {
  16   return ((INT_MAX + 1) * 0) * x; /* { dg-warning "integer overflow in expression" } */
  17 }
  18