ultrixcc.c revision 55714 
1#include <stdio.h>
2
3/* This is a cc optimiser bug for ultrix 4.3, mips CPU.
4 * What happens is that the compiler, due to the (a)&7,
5 * does
6 * i=a&7;
7 * i--;
8 * i*=4;
9 * Then uses i as the offset into a jump table.
10 * The problem is that a value of 0 generates an offset of
11 * 0xfffffffc.
12 */
13
14main()
15	{
16	f(5);
17	f(0);
18	}
19
20int f(a)
21int a;
22	{
23	switch(a&7)
24		{
25	case 7:
26		printf("7\n");
27	case 6:
28		printf("6\n");
29	case 5:
30		printf("5\n");
31	case 4:
32		printf("4\n");
33	case 3:
34		printf("3\n");
35	case 2:
36		printf("2\n");
37	case 1:
38		printf("1\n");
39#ifdef FIX_BUG
40	case 0:
41		;
42#endif
43		}
44	}
45
46