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/* Translation of ISL AST to Gimple.
Copyright (C) 2014 Free Software Foundation, Inc.
Contributed by Roman Gareev <gareevroman@gmail.com>.
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 "config.h"
#ifdef HAVE_cloog
#include <isl/set.h>
#include <isl/map.h>
#include <isl/union_map.h>
#include <isl/ast_build.h>
#endif
#include "system.h"
#include "coretypes.h"
#include "tree.h"
#include "basic-block.h"
#include "tree-ssa-alias.h"
#include "internal-fn.h"
#include "gimple-expr.h"
#include "is-a.h"
#include "gimple.h"
#include "gimple-iterator.h"
#include "tree-ssa-loop.h"
#include "tree-pass.h"
#include "cfgloop.h"
#include "tree-data-ref.h"
#include "sese.h"
#ifdef HAVE_cloog
#include "graphite-poly.h"
#include "graphite-isl-ast-to-gimple.h"
/* This flag is set when an error occurred during the translation of
ISL AST to Gimple. */
static bool graphite_regenerate_error;
/* Prints NODE to FILE. */
void
print_isl_ast_node (FILE *file, __isl_keep isl_ast_node *node,
__isl_keep isl_ctx *ctx)
{
isl_printer *prn = isl_printer_to_file (ctx, file);
prn = isl_printer_set_output_format (prn, ISL_FORMAT_C);
prn = isl_printer_print_ast_node (prn, node);
prn = isl_printer_print_str (prn, "\n");
isl_printer_free (prn);
}
/* Generates a build, which specifies the constraints on the parameters. */
static __isl_give isl_ast_build *
generate_isl_context (scop_p scop)
{
isl_set *context_isl = isl_set_params (isl_set_copy (scop->context));
return isl_ast_build_from_context (context_isl);
}
/* Generates a schedule, which specifies an order used to
visit elements in a domain. */
static __isl_give isl_union_map *
generate_isl_schedule (scop_p scop)
{
int i;
poly_bb_p pbb;
isl_union_map *schedule_isl =
isl_union_map_empty (isl_set_get_space (scop->context));
FOR_EACH_VEC_ELT (SCOP_BBS (scop), i, pbb)
{
/* Dead code elimination: when the domain of a PBB is empty,
don't generate code for the PBB. */
if (isl_set_is_empty (pbb->domain))
continue;
isl_map *bb_schedule = isl_map_copy (pbb->transformed);
bb_schedule = isl_map_intersect_domain (bb_schedule,
isl_set_copy (pbb->domain));
schedule_isl =
isl_union_map_union (schedule_isl,
isl_union_map_from_map (bb_schedule));
}
return schedule_isl;
}
static __isl_give isl_ast_node *
scop_to_isl_ast (scop_p scop)
{
isl_union_map *schedule_isl = generate_isl_schedule (scop);
isl_ast_build *context_isl = generate_isl_context (scop);
isl_ast_node *ast_isl = isl_ast_build_ast_from_schedule (context_isl,
schedule_isl);
isl_ast_build_free (context_isl);
return ast_isl;
}
/* GIMPLE Loop Generator: generates loops from STMT in GIMPLE form for
the given SCOP. Return true if code generation succeeded.
FIXME: This is not yet a full implementation of the code generator
with ISL ASTs. Generation of GIMPLE code is have to be added. */
bool
graphite_regenerate_ast_isl (scop_p scop)
{
timevar_push (TV_GRAPHITE_CODE_GEN);
graphite_regenerate_error = false;
isl_ast_node *root_node = scop_to_isl_ast (scop);
if (dump_file && (dump_flags & TDF_DETAILS))
{
fprintf (dump_file, "\nISL AST generated by ISL: \n");
print_isl_ast_node (dump_file, root_node, scop->ctx);
}
isl_ast_node_free (root_node);
timevar_pop (TV_GRAPHITE_CODE_GEN);
return !graphite_regenerate_error;
}
#endif
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