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d5f96005 PA |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
88b9d363 | 3 | Copyright 1993-2022 Free Software Foundation, Inc. |
d5f96005 PA |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #if defined __x86_64__ | |
19 | # define ASM_REG "rax" | |
20 | #elif defined __i386__ | |
21 | # define ASM_REG "eax" | |
22 | #else | |
23 | # error "port me" | |
24 | #endif | |
25 | ||
26 | /* A class small enough that it fits in a register. */ | |
27 | struct small | |
28 | { | |
29 | int x; | |
30 | int method (); | |
31 | }; | |
32 | ||
33 | int | |
34 | small::method () | |
35 | { | |
36 | return x + 5; | |
37 | } | |
38 | ||
39 | int | |
40 | register_class () | |
41 | { | |
42 | /* Given the use of the GNU register-asm local variables extension, | |
43 | the compiler puts this variable in a register. This means that | |
44 | GDB can't call any methods for this variable, which is what we | |
45 | want to test. */ | |
46 | register small v asm (ASM_REG); | |
47 | ||
48 | int i; | |
49 | ||
50 | /* Perform a computation sufficiently complicated that optimizing | |
51 | compilers won't optimize out the variable. If some compiler | |
52 | constant-folds this whole loop, maybe using a parameter to this | |
53 | function here would help. */ | |
54 | v.x = 0; | |
55 | for (i = 0; i < 13; ++i) | |
56 | v.x += i; | |
57 | --v.x; /* v.x is now 77 */ | |
58 | return v.x + 5; /* set breakpoint here */ | |
59 | } | |
60 | ||
61 | int | |
62 | main () | |
63 | { | |
64 | register_class (); | |
65 | return 0; | |
66 | } |