sdcc/support/regression/tests/bug-3463.c

   1 /* bug-3463.c
   2    A codegen issue related to writing a bit-filed to a pointer (similar to bug #3461, but this test case triggers it for different backends).
   3  */
   4
   5 #include <testfwk.h>
   6 #include <stdlib.h>
   7 #include <stdint.h>
   8
   9 unsigned char *ptemp;
  10 unsigned char temp;
  11
  12 struct {
  13   unsigned char b0 : 1;
  14   unsigned char b1 : 1;
  15   unsigned char b2 : 1;
  16   unsigned char b3 : 1;
  17   unsigned char b4_7 : 4;
  18 } sb_bf;
  19
  20
  21 void
  22 test(void)
  23 {
  24   ptemp=&temp;
  25   sb_bf.b4_7=2;
  26   ASSERT( sb_bf.b4_7==2 );
  27   *ptemp=0xFF;
  28   ASSERT( *ptemp == 0xFF );
  29   *ptemp=sb_bf.b4_7;
  30   ASSERT( *ptemp == 2 );
  31   ASSERT( *ptemp != 0x2F );
  32   *ptemp=(unsigned char) sb_bf.b4_7;
  33   ASSERT( *ptemp == 2 );
  34   ASSERT( *ptemp != 0x2F );
  35   temp=0xFF;
  36   ASSERT( temp == 0xFF );
  37   temp=sb_bf.b4_7;
  38   ASSERT( temp == 2 );
  39 }
  40