]>
Commit | Line | Data |
---|---|---|
dfeab068 RE |
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 | ||
14 | main() | |
15 | { | |
16 | f(5); | |
17 | f(0); | |
18 | } | |
19 | ||
20 | int f(a) | |
21 | int 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 |