gcc/testsuite/gcc.dg/pr52283.c

   1 /* Test for case labels not integer constant expressions but folding
   2    to integer constants (used in Linux kernel).  */
   3 /* { dg-do compile } */
   4 /* { dg-options "-pedantic" } */
   5
   6 extern unsigned int u;
   7
   8 void
   9 b (int c)
  10 {
  11   switch (c)
  12     {
  13     case (int) (2  | ((4 < 8) ? 8 : u)): /* { dg-warning "case label is not an integer constant expression" } */
  14       ;
  15     }
  16 }
  17