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29df5715 | 1 | /* Smoketest example for libgccjit.so C++ API |
83ffe9cd | 2 | Copyright (C) 2014-2023 Free Software Foundation, Inc. |
29df5715 DM |
3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include <libgccjit++.h> | |
21 | ||
22 | #include <stdlib.h> | |
23 | #include <stdio.h> | |
24 | ||
25 | static void | |
26 | create_code (gccjit::context ctxt) | |
27 | { | |
28 | /* Let's try to inject the equivalent of this C code: | |
29 | void | |
30 | greet (const char *name) | |
31 | { | |
32 | printf ("hello %s\n", name); | |
33 | } | |
34 | */ | |
35 | gccjit::type void_type = ctxt.get_type (GCC_JIT_TYPE_VOID); | |
36 | gccjit::type const_char_ptr_type = | |
37 | ctxt.get_type (GCC_JIT_TYPE_CONST_CHAR_PTR); | |
38 | gccjit::param param_name = | |
39 | ctxt.new_param (const_char_ptr_type, "name"); | |
40 | std::vector<gccjit::param> func_params; | |
41 | func_params.push_back (param_name); | |
42 | gccjit::function func = | |
43 | ctxt.new_function (GCC_JIT_FUNCTION_EXPORTED, | |
44 | void_type, | |
45 | "greet", | |
46 | func_params, 0); | |
47 | ||
48 | gccjit::param param_format = | |
49 | ctxt.new_param (const_char_ptr_type, "format"); | |
50 | std::vector<gccjit::param> printf_params; | |
51 | printf_params.push_back (param_format); | |
52 | gccjit::function printf_func = | |
53 | ctxt.new_function (GCC_JIT_FUNCTION_IMPORTED, | |
54 | ctxt.get_type (GCC_JIT_TYPE_INT), | |
55 | "printf", | |
56 | printf_params, 1); | |
57 | ||
58 | gccjit::block block = func.new_block (); | |
59 | block.add_eval (ctxt.new_call (printf_func, | |
60 | ctxt.new_rvalue ("hello %s\n"), | |
61 | param_name)); | |
62 | block.end_with_return (); | |
63 | } | |
64 | ||
65 | int | |
66 | main (int argc, char **argv) | |
67 | { | |
68 | gccjit::context ctxt; | |
69 | gcc_jit_result *result; | |
70 | ||
71 | /* Get a "context" object for working with the library. */ | |
72 | ctxt = gccjit::context::acquire (); | |
73 | ||
74 | /* Set some options on the context. | |
75 | Turn this on to see the code being generated, in assembler form. */ | |
76 | ctxt.set_bool_option (GCC_JIT_BOOL_OPTION_DUMP_GENERATED_CODE, 0); | |
77 | ||
78 | /* Populate the context. */ | |
79 | create_code (ctxt); | |
80 | ||
81 | /* Compile the code. */ | |
82 | result = ctxt.compile (); | |
83 | if (!result) | |
84 | { | |
85 | fprintf (stderr, "NULL result"); | |
86 | exit (1); | |
87 | } | |
88 | ||
89 | ctxt.release (); | |
90 | ||
91 | /* Extract the generated code from "result". */ | |
92 | typedef void (*fn_type) (const char *); | |
93 | fn_type greet = | |
94 | (fn_type)gcc_jit_result_get_code (result, "greet"); | |
95 | if (!greet) | |
96 | { | |
97 | fprintf (stderr, "NULL greet"); | |
98 | exit (1); | |
99 | } | |
100 | ||
101 | /* Now call the generated function: */ | |
102 | greet ("world"); | |
103 | fflush (stdout); | |
104 | ||
105 | gcc_jit_result_release (result); | |
106 | return 0; | |
107 | } |