gcc/testsuite/gcc.dg/Wvla-larger-than-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wvla-larger-than=100 -O2" } */
   3
   4 typedef __SIZE_TYPE__ size_t;
   5
   6 extern void useit (char *);
   7
   8 int num;
   9
  10 void test_vlas (size_t num)
  11 {
  12   char str2[num];               /* { dg-warning "unbounded use" } */
  13   useit(str2);
  14
  15   num = 98;
  16   for (int i=0; i < 1234; ++i) {
  17     char str[num];              // OK, VLA in a loop, but it is a
  18                                 // known size *AND* the compiler takes
  19                                 // care of cleaning up between
  20                                 // iterations with
  21                                 // __builtin_stack_restore.
  22     useit(str);
  23   }
  24 }