gcc/testsuite/gcc.dg/20041231-1.c

   1 /* PR17544 Incorrect -Wunreachable-code warning
   2    Origin: Giovanni Bajo
   3
   4    In C99 we append a "return 0;" when finishing a function, but it was
   5    not given a source location.  The gimplifier thinks a return statement
   6    needs a locus so it would add one, making the compiler generated code
   7    visible to the unreachable code warning.  */
   8
   9 /* { dg-do compile } */
  10 /* { dg-options "-std=c99 -O -Wunreachable-code" } */
  11
  12 int main (void)    // 1
  13 {                  // 2
  14   return 0;        // 3
  15 }                  // 4