blob: 7f036f10163ea712f37f5cbd9dd1225543fa8d9f [file] [log] [blame]
/* Smoketest example for libgccjit.so C++ API
Copyright (C) 2014-2021 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 (gccjit::context ctxt)
{
/* Let's try to inject the equivalent of this C code:
void
greet (const char *name)
{
printf ("hello %s\n", name);
}
*/
gccjit::type void_type = ctxt.get_type (GCC_JIT_TYPE_VOID);
gccjit::type const_char_ptr_type =
ctxt.get_type (GCC_JIT_TYPE_CONST_CHAR_PTR);
gccjit::param param_name =
ctxt.new_param (const_char_ptr_type, "name");
std::vector<gccjit::param> func_params;
func_params.push_back (param_name);
gccjit::function func =
ctxt.new_function (GCC_JIT_FUNCTION_EXPORTED,
void_type,
"greet",
func_params, 0);
gccjit::param param_format =
ctxt.new_param (const_char_ptr_type, "format");
std::vector<gccjit::param> printf_params;
printf_params.push_back (param_format);
gccjit::function printf_func =
ctxt.new_function (GCC_JIT_FUNCTION_IMPORTED,
ctxt.get_type (GCC_JIT_TYPE_INT),
"printf",
printf_params, 1);
gccjit::block block = func.new_block ();
block.add_eval (ctxt.new_call (printf_func,
ctxt.new_rvalue ("hello %s\n"),
param_name));
block.end_with_return ();
}
int
main (int argc, char **argv)
{
gccjit::context ctxt;
gcc_jit_result *result;
/* Get a "context" object for working with the library. */
ctxt = gccjit::context::acquire ();
/* Set some options on the context.
Turn this on to see the code being generated, in assembler form. */
ctxt.set_bool_option (GCC_JIT_BOOL_OPTION_DUMP_GENERATED_CODE, 0);
/* Populate the context. */
create_code (ctxt);
/* Compile the code. */
result = ctxt.compile ();
if (!result)
{
fprintf (stderr, "NULL result");
exit (1);
}
ctxt.release ();
/* 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_result_release (result);
return 0;
}