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/* Smoketest example for libgccjit.so
Copyright (C) 2014-2022 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include <libgccjit.h>
#include <stdlib.h>
#include <stdio.h>
static void
create_code (gcc_jit_context *ctxt)
{
/* Let's try to inject the equivalent of:
void
greet (const char *name)
{
printf ("hello %s\n", name);
}
*/
gcc_jit_type *void_type =
gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_VOID);
gcc_jit_type *const_char_ptr_type =
gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_CONST_CHAR_PTR);
gcc_jit_param *param_name =
gcc_jit_context_new_param (ctxt, NULL, const_char_ptr_type, "name");
gcc_jit_function *func =
gcc_jit_context_new_function (ctxt, NULL,
GCC_JIT_FUNCTION_EXPORTED,
void_type,
"greet",
1, ¶m_name,
0);
gcc_jit_param *param_format =
gcc_jit_context_new_param (ctxt, NULL, const_char_ptr_type, "format");
gcc_jit_function *printf_func =
gcc_jit_context_new_function (ctxt, NULL,
GCC_JIT_FUNCTION_IMPORTED,
gcc_jit_context_get_type (
ctxt, GCC_JIT_TYPE_INT),
"printf",
1, ¶m_format,
1);
gcc_jit_rvalue *args[2];
args[0] = gcc_jit_context_new_string_literal (ctxt, "hello %s\n");
args[1] = gcc_jit_param_as_rvalue (param_name);
gcc_jit_block *block = gcc_jit_function_new_block (func, NULL);
gcc_jit_block_add_eval (
block, NULL,
gcc_jit_context_new_call (ctxt,
NULL,
printf_func,
2, args));
gcc_jit_block_end_with_void_return (block, NULL);
}
int
main (int argc, char **argv)
{
gcc_jit_context *ctxt;
gcc_jit_result *result;
/* Get a "context" object for working with the library. */
ctxt = gcc_jit_context_acquire ();
if (!ctxt)
{
fprintf (stderr, "NULL ctxt");
exit (1);
}
/* Set some options on the context.
Let's see the code being generated, in assembler form. */
gcc_jit_context_set_bool_option (
ctxt,
GCC_JIT_BOOL_OPTION_DUMP_GENERATED_CODE,
0);
/* Populate the context. */
create_code (ctxt);
/* Compile the code. */
result = gcc_jit_context_compile (ctxt);
if (!result)
{
fprintf (stderr, "NULL result");
exit (1);
}
/* Extract the generated code from "result". */
typedef void (*fn_type) (const char *);
fn_type greet =
(fn_type)gcc_jit_result_get_code (result, "greet");
if (!greet)
{
fprintf (stderr, "NULL greet");
exit (1);
}
/* Now call the generated function: */
greet ("world");
fflush (stdout);
gcc_jit_context_release (ctxt);
gcc_jit_result_release (result);
return 0;
}
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