gcc/testsuite/gcc.dg/vla-stexp-2.c

   1 /* PR101838 */
   2 /* { dg-do run } */
   3 /* { dg-options "-Wpedantic -O0" } */
   4 /* { dg-require-effective-target alloca } */
   5
   6
   7 int bar0(
   8         int (*a)[*],
   9         int (*b)[sizeof(*a)]
  10 );
  11
  12
  13 int bar(
  14         struct f {              /* { dg-warning "will not be visible outside of this definition" } */
  15                 int a[*]; } v,  /* { dg-warning "variably modified type" } */
  16         int (*b)[sizeof(struct f)]      // should not warn about zero size
  17 );
  18
  19 int foo(void)
  20 {
  21         int n = 0;
  22         return sizeof(typeof(*({ n = 10; struct foo {   /* { dg-warning "braced-groups" } */
  23                                         int x[n];       /* { dg-warning "variably modified type" } */
  24         } x; &x; })));
  25 }
  26
  27
  28 int main()
  29 {
  30         if (sizeof(struct foo { int x[10]; }) != foo())
  31                 __builtin_abort();
  32
  33         return 0;
  34 }