sdcc/support/regression/tests/bug-3126.c

   1 /* bug-3126.c
   2    A still-needed pointer in register pair hl was overwritten when hl was used for a stack access on gbz80.
   3  */
   4
   5 #include <testfwk.h>
   6
   7 unsigned char test1;
   8 unsigned char test2;
   9
  10 typedef struct _BankPtr
  11 {
  12   unsigned char bank;
  13   unsigned int offset;
  14 } BankPtr;
  15
  16 const BankPtr scene_bank_ptrs[] = {{0x06, 0x3C53}};
  17
  18 void TestFn2(unsigned char i)
  19 {
  20   test2 = i;
  21 }
  22
  23 void TestFn(unsigned int index)
  24 {
  25   unsigned char bank;
  26   unsigned int data_ptr;
  27
  28   bank = scene_bank_ptrs[index].bank;
  29   data_ptr = scene_bank_ptrs[index].offset;
  30
  31   /* This section doesn't matter but the bug doesn't trigger without it */
  32   test1 = 1;
  33   TestFn2(bank);
  34   /**/
  35
  36   ASSERT(data_ptr == 0x3C53);
  37 }
  38
  39 void
  40 testBug(void)
  41 {
  42   TestFn(0);
  43 }
  44