gcc/testsuite/gcc.dg/builtins-13.c

   1 /* Copyright (C) 2003  Free Software Foundation.
   2
   3    Verify that the malloc-like __builtin_ allocation functions are
   4    correctly aliased by the compiler.
   5
   6    Written by Roger Sayle, 12th April 2003.  */
   7
   8 /* { dg-do link } */
   9 /* { dg-options "-ansi" } */
  10
  11 typedef __SIZE_TYPE__ size_t;
  12
  13 extern void abort (void);
  14 extern void *malloc (size_t);
  15 extern void *calloc (size_t,size_t);
  16
  17 extern void link_error (void);
  18
  19 static int x;
  20
  21 void test1(void)
  22 {
  23   int *ptr1, *ptr2;
  24
  25   ptr1 = &x;
  26   ptr2 = (int*) malloc (sizeof (int));
  27
  28   *ptr1 = 12;
  29   *ptr2 = 8;
  30
  31   if (*ptr1 != 12)
  32     link_error();
  33 }
  34
  35 void test2(void)
  36 {
  37   int *ptr1, *ptr2;
  38
  39   ptr1 = &x;
  40   ptr2 = (int*) calloc (1, sizeof (int));
  41
  42   *ptr1 = 12;
  43   *ptr2 = 8;
  44
  45   if (*ptr1 != 12)
  46     link_error ();
  47 }
  48
  49 int main()
  50 {
  51   test1 ();
  52   test2 ();
  53   return 0;
  54 }
  55
  56 #ifndef __OPTIMIZE__
  57 void link_error (void)
  58 {
  59   abort ();
  60 }
  61 #endif
  62