gcc/testsuite/gcc.dg/Walloc-size-larger-than-16.c

   1 /* PR middle-end/82063 - issues with arguments enabled by -Wall
   2    { dg-do compile }
   3    { dg-options "-O -Walloc-size-larger-than=1zb -ftrack-macro-expansion=0" } */
   4
   5 typedef __SIZE_TYPE__ size_t;
   6
   7 void sink (void*);
   8
   9 #define T(x) sink (x)
  10
  11 /* Verify that an invalid -Walloc-size-larger-than argument is diagnosed
  12    and rejected without changing the default setting of PTRDIFF_MAX.  */
  13
  14 void f (void)
  15 {
  16   size_t n = 0;
  17   T (__builtin_malloc (n));
  18
  19   n = __PTRDIFF_MAX__;
  20   T (__builtin_malloc (n));
  21
  22   n += 1;
  23   T (__builtin_malloc (n));   /* { dg-warning "exceeds maximum object size" } */
  24
  25   n = __SIZE_MAX__ - 1;
  26   T (__builtin_malloc (n));   /* { dg-warning "exceeds maximum object size" } */
  27
  28   n = __SIZE_MAX__;
  29   T (__builtin_malloc (n));   /* { dg-warning "exceeds maximum object size" } */
  30 }
  31
  32 /* { dg-warning "invalid argument .1zb. to .-Walloc-size-larger-than=." "" { target *-*-* } 0 } */