/*

 * Copyright 2012      Ecole Normale Superieure

 *

 * Use of this software is governed by the MIT license

 *

 * Written by Sven Verdoolaege,

 * Ecole Normale Superieure, 45 rue d’Ulm, 75230 Paris, France

 */

/* This program prints an AST that scans the domain elements of

 * the domain of a given schedule in the order of their image(s).

 *

 * The input consists of three sets/relations.

 * - a schedule

 * - a context

 * - a relation describing AST generation options

 */

#include <assert.h>

#include <isl/ast.h>

#include <isl/ast_build.h>

#include <isl/options.h>

#include <isl/set.h>

struct options {

	struct isl_options	*isl;

	unsigned		 atomic;

	unsigned		 separate;

};

ISL_ARGS_START(struct options, options_args)

ISL_ARG_CHILD(struct options, isl, "isl", &isl_options_args, "isl options")

ISL_ARG_BOOL(struct options, atomic, 0, "atomic", 0,

	"globally set the atomic option")

ISL_ARG_BOOL(struct options, separate, 0, "separate", 0,

	"globally set the separate option")

ISL_ARGS_END

ISL_ARG_DEF(options, struct options, options_args)

/* Return a universal, 1-dimensional set with the given name.

 */

static __isl_give isl_union_set *universe(isl_ctx *ctx, const char *name)

{

	isl_space *space;

	space = isl_space_set_alloc(ctx, 0, 1);

	space = isl_space_set_tuple_name(space, isl_dim_set, name);

	return isl_union_set_from_set(isl_set_universe(space));

}

/* Set the "name" option for the entire schedule domain.

 */

static __isl_give isl_union_map *set_universe(__isl_take isl_union_map *opt,

	__isl_keep isl_union_map *schedule, const char *name)

{

	isl_ctx *ctx;

	isl_union_set *domain, *target;

	isl_union_map *option;

	ctx = isl_union_map_get_ctx(opt);

	domain = isl_union_map_range(isl_union_map_copy(schedule));

	domain = isl_union_set_universe(domain);

	target = universe(ctx, name);

	option = isl_union_map_from_domain_and_range(domain, target);

	opt = isl_union_map_union(opt, option);

	return opt;

}

/* Update the build options based on the user-specified options.

 *

 * If the --separate or --atomic options were specified, then

 * we clear any separate or atomic options that may already exist in "opt".

 */

static __isl_give isl_ast_build *set_options(__isl_take isl_ast_build *build,

	__isl_take isl_union_map *opt, struct options *options,

	__isl_keep isl_union_map *schedule)

{

	if (options->separate || options->atomic) {

		isl_ctx *ctx;

		isl_union_set *target;

		ctx = isl_union_map_get_ctx(schedule);

		target = universe(ctx, "separate");

		opt = isl_union_map_subtract_range(opt, target);

		target = universe(ctx, "atomic");

		opt = isl_union_map_subtract_range(opt, target);

	}

	if (options->separate)

		opt = set_universe(opt, schedule, "separate");

	if (options->atomic)

		opt = set_universe(opt, schedule, "atomic");

	build = isl_ast_build_set_options(build, opt);

	return build;

}

int main(int argc, char **argv)

{

	isl_ctx *ctx;

	isl_set *context;

	isl_union_map *schedule;

	isl_union_map *options_map;

	isl_ast_build *build;

	isl_ast_node *tree;

	struct options *options;

	isl_printer *p;

	options = options_new_with_defaults();

	assert(options);

	argc = options_parse(options, argc, argv, ISL_ARG_ALL);

	ctx = isl_ctx_alloc_with_options(&options_args, options);

	schedule = isl_union_map_read_from_file(ctx, stdin);

	context = isl_set_read_from_file(ctx, stdin);

	options_map = isl_union_map_read_from_file(ctx, stdin);

	build = isl_ast_build_from_context(context);

	build = set_options(build, options_map, options, schedule);

	tree = isl_ast_build_ast_from_schedule(build, schedule);

	isl_ast_build_free(build);

	p = isl_printer_to_file(ctx, stdout);

	p = isl_printer_set_output_format(p, ISL_FORMAT_C);

	p = isl_printer_print_ast_node(p, tree);

	isl_printer_free(p);

	isl_ast_node_free(tree);

	isl_ctx_free(ctx);

	return 0;

}