gcc/

	* Makefile.in:
	Add the compilation of graphite-isl-ast-to-gimple.o.
	* common.opt:
	Add new switch fgraphite-code-generator=[isl|cloog].
	* flag-types.h:
	Add new enum fgraphite_generator.
	* graphite-isl-ast-to-gimple.c: New.
	* graphite-isl-ast-to-gimple.h: New.
	* graphite.c (graphite_transform_loops):
	Add choice of Graphite code generator,
	which depends on flag_graphite_code_gen.

	gcc/testsuite/gcc.dg/graphite/isl-codegen-loop-dumping.c:
	New testcase that checks that the dump is generated.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@212124 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 133 insertions, 0 deletions

diff --git a/gcc/graphite-isl-ast-to-gimple.c b/gcc/graphite-isl-ast-to-gimple.c
new file mode 100644
index 00000000000..6437474741e
--- /dev/null
+++ b/gcc/graphite-isl-ast-to-gimple.c
@@ -0,0 +1,133 @@
+/* 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"
+
+#include <isl/set.h>
+#include <isl/map.h>
+#include <isl/union_map.h>
+#include <isl/ast_build.h>
+
+#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"
+
+#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_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_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_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;
+}