gcc/testsuite/gcc.dg/Walloca-10.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target alloca } */
   3 /* { dg-options "-Walloca-larger-than=2000 -O2" } */
   4
   5 // Test when the conditionals are incorrectly reversed.
   6
   7 void f (void *);
   8 void foo (__SIZE_TYPE__ len)
   9 {
  10   void *p;
  11   if (len < 500)
  12     p = __builtin_malloc (len);
  13   else
  14     p = __builtin_alloca (len); // { dg-warning "argument to .alloca. may be too large" }
  15   f (p);
  16 }
  17
  18 void bar (__SIZE_TYPE__ len)
  19 {
  20   void *p;
  21   if (len > 500)
  22     p = __builtin_alloca (len); // { dg-warning "argument to .alloca. may be too large" }
  23   else
  24     p = __builtin_malloc (len);
  25   f (p);
  26 }