gcc/testsuite/gcc.target/i386/iamcu/test_passing_structs_and_unions.c

   1 /* This tests passing of structs. Only integers are tested.  */
   2
   3 #include "defines.h"
   4 #include "args.h"
   5
   6 struct IntegerRegisters iregbits = { ~0, ~0, ~0, ~0, ~0, ~0 };
   7 struct IntegerRegisters iregs;
   8 unsigned int num_iregs;
   9
  10 struct int_struct
  11 {
  12   int i;
  13 };
  14
  15 struct longlong_struct
  16 {
  17   long long ll;
  18 };
  19
  20 struct long2_struct
  21 {
  22   long long ll1, ll2;
  23 };
  24
  25 struct long3_struct
  26 {
  27   long l1, l2, l3;
  28 };
  29
  30 union un1
  31 {
  32   char c;
  33   int i;
  34 };
  35
  36 union un2
  37 {
  38   char c1;
  39   long l;
  40   char c2;
  41 };
  42
  43 union un3
  44 {
  45   struct int_struct is;
  46   struct longlong_struct ls;
  47   union un1 un;
  48 };
  49
  50
  51 void
  52 check_mixed_passing1 (char c1 ATTRIBUTE_UNUSED, struct int_struct is ATTRIBUTE_UNUSED, char c2 ATTRIBUTE_UNUSED)
  53 {
  54   check_int_arguments;
  55 }
  56
  57 void
  58 check_mixed_passing2 (char c1 ATTRIBUTE_UNUSED, struct long3_struct ls ATTRIBUTE_UNUSED, char c2 ATTRIBUTE_UNUSED)
  59 {
  60   check_int_arguments;
  61
  62   /* Check the passing on the stack by comparing the address of the
  63      stack elements to the expected place on the stack.  */
  64   assert ((unsigned long)&ls.l1 == esp+4);
  65   assert ((unsigned long)&ls.l2 == esp+8);
  66   assert ((unsigned long)&ls.l3 == esp+12);
  67 }
  68
  69 int
  70 main (void)
  71 {
  72   struct int_struct is = { 64 };
  73 #ifdef CHECK_LARGER_STRUCTS
  74   struct long3_struct l3s = { 65, 66, 67 };
  75 #endif
  76
  77   clear_struct_registers;
  78   iregs.I0 = 8;
  79   iregs.I1 = 64;
  80   iregs.I2 = 9;
  81   num_iregs = 3;
  82   clear_int_hardware_registers;
  83   WRAP_CALL (check_mixed_passing1)(8, is, 9);
  84
  85 #ifdef CHECK_LARGER_STRUCTS
  86   clear_struct_registers;
  87   iregs.I0 = 10;
  88   iregbits.I0 = 0xff;
  89   iregs.I1 = 11;
  90   iregbits.I1 = 0xff;
  91   num_iregs = 2;
  92   clear_int_hardware_registers;
  93   WRAP_CALL (check_mixed_passing2)(10, l3s, 11);
  94 #endif
  95
  96   return 0;
  97 }