gcc/testsuite/gcc.dg/Walloc-size-larger-than-3.c

/* PR middle-end/82063 - issues with arguments enabled by -Wall
   { dg-do compile }
   { dg-options "-O -Walloc-size-larger-than=1kB -ftrack-macro-expansion=0" } */

void sink (void*);

#define T(x) sink (x)

void f (void)
{
  unsigned n = 0;
  T (__builtin_malloc (n));

  n = 1000;   /* 1 kilobyte (kB, not to be confused with KB or KiB) */
  T (__builtin_malloc (n));

  n = 1001;
  T (__builtin_malloc (n));   /* { dg-warning "argument 1 value .1001. exceeds maximum object size 1000" } */
}