[mirror_ubuntu-artful-kernel.git] / scripts / gcc-plugins / cyc_complexity_plugin.c

/*
 * Copyright 2011-2016 by Emese Revfy <re.emese@gmail.com>
 * Licensed under the GPL v2, or (at your option) v3
 *
 * Homepage:
 * https://github.com/ephox-gcc-plugins/cyclomatic_complexity
 *
 * http://en.wikipedia.org/wiki/Cyclomatic_complexity
 * The complexity M is then defined as:
 * M = E - N + 2P
 * where
 *
 *  E = the number of edges of the graph
 *  N = the number of nodes of the graph
 *  P = the number of connected components (exit nodes).
 *
 * Usage (4.5 - 5):
 * $ make clean; make run
 */

#include "gcc-common.h"

__visible int plugin_is_GPL_compatible;

static struct plugin_info cyc_complexity_plugin_info = {
	.version	= "20160225",
	.help		= "Cyclomatic Complexity\n",
};

static unsigned int cyc_complexity_execute(void)
{
	int complexity;
	expanded_location xloc;

	/* M = E - N + 2P */
	complexity = n_edges_for_fn(cfun) - n_basic_blocks_for_fn(cfun) + 2;

	xloc = expand_location(DECL_SOURCE_LOCATION(current_function_decl));
	fprintf(stderr, "Cyclomatic Complexity %d %s:%s\n", complexity,
		xloc.file, DECL_NAME_POINTER(current_function_decl));

	return 0;
}

#define PASS_NAME cyc_complexity

#define NO_GATE
#define TODO_FLAGS_FINISH TODO_dump_func

#include "gcc-generate-gimple-pass.h"

__visible int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version)
{
	const char * const plugin_name = plugin_info->base_name;

	PASS_INFO(cyc_complexity, "ssa", 1, PASS_POS_INSERT_AFTER);

	if (!plugin_default_version_check(version, &gcc_version)) {
		error(G_("incompatible gcc/plugin versions"));
		return 1;
	}

	register_callback(plugin_name, PLUGIN_INFO, NULL,
				&cyc_complexity_plugin_info);
	register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL,
				&cyc_complexity_pass_info);

	return 0;
}
Commit	Line	Data
0dae776c ER	1	/*
	2	* Copyright 2011-2016 by Emese Revfy <re.emese@gmail.com>
	3	* Licensed under the GPL v2, or (at your option) v3
	4	*
	5	* Homepage:
	6	* https://github.com/ephox-gcc-plugins/cyclomatic_complexity
	7	*
	8	* http://en.wikipedia.org/wiki/Cyclomatic_complexity
	9	* The complexity M is then defined as:
	10	* M = E - N + 2P
	11	* where
	12	*
	13	* E = the number of edges of the graph
	14	* N = the number of nodes of the graph
	15	* P = the number of connected components (exit nodes).
	16	*
	17	* Usage (4.5 - 5):
	18	* $ make clean; make run
	19	*/
	20
	21	#include "gcc-common.h"
	22
da7389ac	23	__visible int plugin_is_GPL_compatible;
0dae776c ER	24
	25	static struct plugin_info cyc_complexity_plugin_info = {
	26	.version = "20160225",
	27	.help = "Cyclomatic Complexity\n",
	28	};
	29
	30	static unsigned int cyc_complexity_execute(void)
	31	{
	32	int complexity;
	33	expanded_location xloc;
	34
	35	/* M = E - N + 2P */
	36	complexity = n_edges_for_fn(cfun) - n_basic_blocks_for_fn(cfun) + 2;
	37
	38	xloc = expand_location(DECL_SOURCE_LOCATION(current_function_decl));
	39	fprintf(stderr, "Cyclomatic Complexity %d %s:%s\n", complexity,
	40	xloc.file, DECL_NAME_POINTER(current_function_decl));
	41
	42	return 0;
	43	}
	44
	45	#define PASS_NAME cyc_complexity
	46
	47	#define NO_GATE
	48	#define TODO_FLAGS_FINISH TODO_dump_func
	49
	50	#include "gcc-generate-gimple-pass.h"
	51
da7389ac	52	__visible int plugin_init(struct plugin_name_args plugin_info, struct plugin_gcc_version version)
0dae776c ER	53	{
0dae776c ER	54	const char * const plugin_name = plugin_info->base_name;
0dae776c	55
5a45a4c5	56	PASS_INFO(cyc_complexity, "ssa", 1, PASS_POS_INSERT_AFTER);
0dae776c ER	57
	58	if (!plugin_default_version_check(version, &gcc_version)) {
	59	error(G_("incompatible gcc/plugin versions"));
	60	return 1;
	61	}
	62
	63	register_callback(plugin_name, PLUGIN_INFO, NULL,
	64	&cyc_complexity_plugin_info);
	65	register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL,
	66	&cyc_complexity_pass_info);
	67
	68	return 0;
	69	}