[GSoC] generation of Gimple code from isl_ast_node_block

[Roman Gareev <gareevroman@gmail.com>]

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I've attached the patch, which contains generation of Gimple code from
isl_ast_node_block. Is it fine for trunk?

--
                                   Cheers, Roman Gareev.

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2014-07-22  Roman Gareev  <gareevroman@gmail.com>

	gcc/
	* graphite-isl-ast-to-gimple.c:
	(translate_isl_ast_node_block): New function.
	(translate_isl_ast): Add calling of translate_isl_ast_node_block.

	gcc/testsuite/gcc.dg/graphite/
	* isl-ast-gen-blocks-1.c: New testcase.
	* isl-ast-gen-blocks-2.c: New testcase.

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Index: gcc/graphite-isl-ast-to-gimple.c
===================================================================
--- gcc/graphite-isl-ast-to-gimple.c	(revision 212913)
+++ gcc/graphite-isl-ast-to-gimple.c	(working copy)
@@ -616,6 +616,26 @@
   return next_e;
 }
 
+/* Translates an isl_ast_node_block to Gimple. */
+
+static edge
+translate_isl_ast_node_block (loop_p context_loop,
+			      __isl_keep isl_ast_node *node,
+			      edge next_e, ivs_params &ip)
+{
+  gcc_assert (isl_ast_node_get_type (node) == isl_ast_node_block);
+  isl_ast_node_list *node_list = isl_ast_node_block_get_children (node);
+  int i;
+  for (i = 0; i < isl_ast_node_list_n_ast_node (node_list); i++)
+    {
+      isl_ast_node *tmp_node = isl_ast_node_list_get_ast_node (node_list, i);
+      next_e = translate_isl_ast (context_loop, tmp_node, next_e, ip);
+      isl_ast_node_free (tmp_node);
+    }
+  isl_ast_node_list_free (node_list);
+  return next_e;
+}
+
 /* Translates an ISL AST node NODE to GCC representation in the
    context of a SESE.  */
 
@@ -639,7 +659,8 @@
       return translate_isl_ast_node_user (node, next_e, ip);
 
     case isl_ast_node_block:
-      return next_e;
+      return translate_isl_ast_node_block (context_loop, node,
+					   next_e, ip);
 
     default:
       gcc_unreachable ();
Index: gcc/testsuite/gcc.dg/graphite/isl-ast-gen-blocks-1.c
===================================================================
--- gcc/testsuite/gcc.dg/graphite/isl-ast-gen-blocks-1.c	(revision 0)
+++ gcc/testsuite/gcc.dg/graphite/isl-ast-gen-blocks-1.c	(working copy)
@@ -0,0 +1,27 @@
+/* { dg-do run } */
+/* { dg-options "-O2 -fgraphite-identity -fgraphite-code-generator=isl" } */
+
+int n = 50;
+static int __attribute__((noinline))
+foo ()
+{
+  int i, res;
+  for (i = 0, res = 0; i < n; i++)
+    res += i;
+
+  return res;
+}
+
+extern void abort ();
+
+int
+main (void)
+{ 
+  int res = foo ();
+
+
+  if (res != 1225)
+    abort ();
+
+  return 0;
+}
Index: gcc/testsuite/gcc.dg/graphite/isl-ast-gen-blocks-2.c
===================================================================
--- gcc/testsuite/gcc.dg/graphite/isl-ast-gen-blocks-2.c	(revision 0)
+++ gcc/testsuite/gcc.dg/graphite/isl-ast-gen-blocks-2.c	(working copy)
@@ -0,0 +1,27 @@
+/* { dg-do run } */
+/* { dg-options "-O2 -fgraphite-identity -fgraphite-code-generator=isl" } */
+
+int k = 50;
+static int __attribute__((noinline))
+foo ()
+{
+  int i, res;
+  for (i = 0, res = 0; i < k; i++)
+    res += i;
+
+  return res;
+}
+
+extern void abort ();
+
+int
+main (void)
+{ 
+  int res = foo ();
+
+
+  if (res != 1225)
+    abort ();
+
+  return 0;
+}