sdcc/support/regression/tests/bug-716242.c

   1 /* bug-716242.c
   2
   3    syntax tests about function pointers at compile time
   4
   5    This also tests an implementation extension that allows the casting of void * to function pointers,
   6    which is not available for the stm8 large memory model.
   7  */
   8 #include <testfwk.h>
   9
  10 #pragma disable_warning 244
  11
  12 #if !defined(__SDCC_pdk14) && !defined(__SDCC_pdk15) // pdk needs functions called via pointer to be reentrant even for a single argument
  13 const void *p;
  14 int ret;
  15
  16 int
  17 mul2 (int i)
  18 {
  19   return 2 * i;
  20 }
  21
  22 void
  23 g (int (*h) (int))
  24 {
  25   ret = h (2);
  26 }
  27
  28 void
  29 f1 ()
  30 {
  31 #if !((defined __SDCC_stm8) && defined (__SDCC_MODEL_LARGE))
  32 #if defined(__SDCC_ds390)
  33   p = (void __code *) mul2;
  34 #else
  35   p = (void *) mul2;
  36 #endif
  37   g ((int (*) (int)) p);
  38 #endif
  39 }
  40
  41 /****************************/
  42
  43 void g (int (*h) (int));
  44
  45 void
  46 f2 ()
  47 {
  48   int (*fp) (int) = p;
  49
  50   g (fp);
  51 }
  52
  53 /****************************/
  54
  55 void g (int (*h) (int));
  56
  57 void
  58 f3 ()
  59 {
  60   int (*fp) (int) = (int (*) (int)) p;
  61
  62   g (fp);
  63 }
  64
  65 /****************************/
  66
  67 void
  68 f4 ()
  69 {
  70   ((void (__code *) (void)) p) ();
  71 }
  72
  73 /****************************/
  74
  75 void
  76 f5 ()
  77 {
  78   int (*fp) (int) = mul2;
  79
  80   fp (1);
  81 }
  82
  83 /****************************/
  84
  85 void
  86 f6 ()
  87 {
  88   ((void (__code *) (void)) 0) ();
  89 }
  90
  91 /****************************/
  92 #endif
  93
  94 static void
  95 testFuncPtr (void)
  96 {
  97 #if !defined(__SDCC_pdk14) && !defined(__SDCC_pdk15)
  98 #if !((defined __SDCC_stm8) && defined (__SDCC_MODEL_LARGE)) // STM8 large model has sizeof(void *) != size of function pointers.
  99   f1 ();
 100   ASSERT (ret == 4);
 101 #endif
 102 #endif
 103 }