bug-460010.c

来自「sdcc是为51等小型嵌入式cpu设计的c语言编译器支持数种不同类型的cpu」· C语言 代码 · 共 40 行

/* bug 460010
 */
#include <testfwk.h>

#ifdef SDCC
#ifdef SDCC_pic16
#define ADDRESS 0x0070
#else
#define ADDRESS 0xa000
#endif  /* SDCC_pic16 */
#endif  /* SDCC */

void 
func( unsigned char a )
{
  UNUSED(a);
}

void
testBadPromotion(void)
{

#ifdef SDCC
  unsigned char c=*((unsigned xdata char*)(ADDRESS));
#else
  unsigned char loc_c;
  unsigned char c=*(unsigned char*)&loc_c;
#endif 
  
  func(c); 
  
  c+='0'; /* is evaluated as an 8-bit expr */ 
  
  func(c); 

  c+='A'-'0'; /* is a 16-bit expr ??? */ 
  
  func(c); 
}