sdcc/support/regression/tests/bug-3169.c

   1 /*
   2    bug-3169.c
   3    A bug in z80 pointer write code generation handling of non-dead register pair de when using --reserve-regs-iy.
   4  */
   5
   6 #include <testfwk.h>
   7
   8 #pragma disable_warning 283
   9
  10 typedef unsigned char uint8_t;
  11 typedef unsigned int uint16_t;
  12 typedef unsigned char bool;
  13
  14 typedef struct _Struct {
  15   uint8_t abyte1;
  16   uint8_t abyte2;
  17   uint16_t aint;
  18 } Struct;
  19
  20 Struct storage;
  21
  22 uint16_t srcInt;
  23 bool flag;
  24
  25 extern void fn1(const Struct*) __z88dk_fastcall;
  26
  27 void f() {
  28
  29   storage.abyte1 = 1;
  30   storage.abyte2 = 10;
  31
  32   if (flag) {
  33     storage.aint = srcInt;
  34     fn1(&storage);
  35
  36     return;
  37   }
  38
  39   storage.aint = 1;
  40   fn1(&storage);
  41 }
  42
  43 void fn1(const Struct *sp) __z88dk_fastcall
  44 {
  45   ASSERT(sp == &storage);
  46 }
  47
  48 void
  49 testBug(void)
  50 {
  51   flag = 1;
  52   f();
  53 }
  54