gcc/testsuite/gcc.dg/stack-usage-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wstack-usage=512" } */
   3 /* { dg-require-effective-target untyped_assembly } */
   4
   5 int foo1 (void)  /* { dg-bogus "stack usage" } */
   6 {
   7   char arr[16];
   8   arr[0] = 1;
   9   return 0;
  10 }
  11
  12 int foo2 (void)  /* { dg-warning "stack usage is \[0-9\]* bytes" } */
  13 {
  14   char arr[1024];
  15   arr[0] = 1;
  16   return 0;
  17 }
  18
  19 /* The actual warning depends on whether stack space is allocated dynamically
  20    or statically.  */
  21 int foo3 (void) /* { dg-warning "stack usage (might be)|(is) \[0-9\]* bytes" } */
  22 {
  23   char arr[1024] __attribute__((aligned (512)));
  24   arr[0] = 1;
  25   /* Force dynamic realignment of argument pointer.  */
  26   __builtin_apply ((void (*)()) foo2, 0, 0);
  27   return 0;
  28 }
  29
  30 int foo4 (int n) /* { dg-warning "stack usage might be unbounded" } */
  31 {
  32   char arr[n];
  33   arr[0] = 1;
  34   return 0;
  35 }