1 /* PR optimization/9888 */
2 /* Originator: Jim Bray <jb@as220.org> */
3 /* { dg-do run } */
4 /* { dg-require-effective-target ia32 } */
5 /* { dg-options "-mtune=k6 -Os" } */
6
7 enum reload_type
8 {
9 RELOAD_FOR_INPUT, RELOAD_FOR_OUTPUT, RELOAD_FOR_INSN,
10 RELOAD_FOR_INPUT_ADDRESS, RELOAD_FOR_INPADDR_ADDRESS,
11 RELOAD_FOR_OUTPUT_ADDRESS, RELOAD_FOR_OUTADDR_ADDRESS,
12 RELOAD_FOR_OPERAND_ADDRESS, RELOAD_FOR_OPADDR_ADDR,
13 RELOAD_OTHER, RELOAD_FOR_OTHER_ADDRESS
14 };
15
16 #define FOO_SIZE 3
17
18 /* My results, varying with FOO_SIZE:
19 30: asm error "value of ..fff77 too large:
20 3 to 29: ....ff7d...
21 1 to 2: no error. */
22
23 struct reload
24 {
25 int foo[FOO_SIZE];
26 int opnum;
27 enum reload_type when_needed;
28 unsigned int optional:1;
29 unsigned int secondary_p:1;
30 };
31
32 #define N_RELOADS 2
33
34 struct reload rld[N_RELOADS];
35 int n_reloads = N_RELOADS;
36
main(void)37 int main(void)
38 {
39 int i;
40
41 enum reload_type operand_type[1];
42
43 enum reload_type address_type[1];
44
45 int operand_reloadnum[1];
46 int goal_alternative_matches[1];
47
48 for (i = 0; i < n_reloads; i++)
49 {
50 if (rld[i].secondary_p
51 && rld[i].when_needed == operand_type[rld[i].opnum])
52 rld[i].when_needed = address_type[rld[i].opnum];
53
54 if ((rld[i].when_needed == RELOAD_FOR_INPUT_ADDRESS
55 || rld[i].when_needed == RELOAD_FOR_OUTPUT_ADDRESS
56 || rld[i].when_needed == RELOAD_FOR_INPADDR_ADDRESS
57 || rld[i].when_needed == RELOAD_FOR_OUTADDR_ADDRESS)
58 && (operand_reloadnum[rld[i].opnum] < 0
59 || rld[operand_reloadnum[rld[i].opnum]].optional))
60 {
61
62 if (rld[i].when_needed == RELOAD_FOR_INPADDR_ADDRESS
63 || rld[i].when_needed == RELOAD_FOR_OUTADDR_ADDRESS)
64 rld[i].when_needed = RELOAD_FOR_OPADDR_ADDR;
65 else
66 rld[i].when_needed = RELOAD_FOR_OPERAND_ADDRESS;
67 }
68
69 if ((rld[i].when_needed == RELOAD_FOR_INPUT_ADDRESS
70 || rld[i].when_needed == RELOAD_FOR_INPADDR_ADDRESS)
71 && operand_reloadnum[rld[i].opnum] >= 0
72 && (rld[operand_reloadnum[rld[i].opnum]].when_needed
73 == RELOAD_OTHER))
74 rld[i].when_needed = RELOAD_FOR_OTHER_ADDRESS;
75
76 if (goal_alternative_matches[rld[i].opnum] >= 0)
77 rld[i].opnum = goal_alternative_matches[rld[i].opnum];
78 }
79
80 return 0;
81 }
82