sdcc/support/regression/tests/bug-524195.c

   1 /* Problem with inverting constants
   2  */
   3 #include <testfwk.h>
   4
   5 enum
   6   {
   7     USEDFLAG = 1
   8   };
   9
  10 typedef struct _HeapEntry HeapEntry;
  11 typedef unsigned int UINT;
  12
  13 struct _HeapEntry
  14 {
  15   HeapEntry *pPrev;
  16   HeapEntry *pNext;
  17   UINT uSize;
  18 };
  19
  20 static UINT _getSize1(HeapEntry *pEnt)
  21 {
  22   return pEnt->uSize & ~USEDFLAG;
  23 }
  24
  25 static UINT _getSize2(HeapEntry *pEnt)
  26 {
  27   return pEnt->uSize & ~1;
  28 }
  29
  30 static UINT _getSize3(HeapEntry *pEnt)
  31 {
  32   return pEnt->uSize & 0xFFFE;
  33 }
  34
  35 static void
  36 testMask(void)
  37 {
  38   HeapEntry ent;
  39   ent.uSize = 123;
  40
  41   ASSERT(_getSize1(&ent) == 122);
  42   ASSERT(_getSize2(&ent) == 122);
  43   ASSERT(_getSize3(&ent) == 122);
  44
  45   ent.uSize = 0x1234;
  46   ASSERT(_getSize1(&ent) == 0x1234);
  47   ASSERT(_getSize2(&ent) == 0x1234);
  48   ASSERT(_getSize3(&ent) == 0x1234);
  49 }