sdcc/support/regression/tests/bug-2368.c

   1 /* bug-2368.c
   2    Wrong byte order in optimization of pointer assignment for stm8
   3  */
   4
   5 #include <testfwk.h>
   6 #include <stdint.h>
   7
   8 #ifdef __SDCC
   9 #pragma std_c99
  10 #endif
  11
  12 #if defined (__SDCC_stm8) || defined (__SDCC_z80) || defined(__SDCC_z80n) || defined (__SDCC_z180) || defined (__SDCC_r2k) || defined (__SDCC_r2ka) || defined (__SDCC_r3ka)
  13
  14 #define TEST_VAL 0x1234
  15
  16 #ifdef __SDCC_stm8 // data memory in lower half of 16-bit address space
  17 #define loc ((volatile uint16_t *) 0x7fd)
  18 #else // data memory in upper half of 16-bit address space
  19 #define loc ((volatile uint16_t *) 0x87fd)
  20 #endif
  21
  22 volatile uint16_t *p = loc;
  23
  24 void foo1 (void)
  25 {
  26   *p = TEST_VAL;
  27 }
  28
  29 void foo2 (void)
  30 {
  31   *loc = TEST_VAL;
  32 }
  33
  34 #endif
  35
  36 void testBug (void)
  37 {
  38 #if defined (__SDCC_stm8) || defined (__SDCC_z80) || defined(__SDCC_z80n) || defined (__SDCC_z180) || defined (__SDCC_r2k) || defined (__SDCC_r2ka) || defined (__SDCC_r3ka)
  39   volatile uint16_t *q = loc;
  40
  41   foo1 ();
  42   ASSERT (*loc == TEST_VAL);
  43   ASSERT (*p == TEST_VAL);
  44   ASSERT (*q == TEST_VAL);
  45
  46   foo2 ();
  47   ASSERT (*loc == TEST_VAL);
  48   ASSERT (*p == TEST_VAL);
  49   ASSERT (*q == TEST_VAL);
  50
  51   *q = TEST_VAL;
  52   ASSERT (*loc == TEST_VAL);
  53   ASSERT (*p == TEST_VAL);
  54   ASSERT (*q == TEST_VAL);
  55
  56 #endif
  57 }