From 333cc5184301dc7efafa0f71d2493f4fd88bc106 Mon Sep 17 00:00:00 2001
From: Roman Gareev <gareevroman@gmail.com>
Date: Mon, 28 Jul 2014 05:49:05 +0000
Subject: [PATCH] [gcc/]

	* graphite-isl-ast-to-gimple.c:
	(graphite_create_new_guard): New function.
	(translate_isl_ast_node_if): New function.
	(translate_isl_ast): Add calling of translate_isl_ast_node_if.

[gcc/testsuite]

	* gcc.dg/graphite/isl-ast-gen-if-1.c: New testcase.

From-SVN: r213109
---
 gcc/ChangeLog                                 |  9 +++++
 gcc/graphite-isl-ast-to-gimple.c              | 40 ++++++++++++++++++-
 .../gcc.dg/graphite/isl-ast-gen-if-1.c        | 37 +++++++++++++++++
 3 files changed, 85 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.dg/graphite/isl-ast-gen-if-1.c

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 62a4e6408bd..187f98858fe 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2014-07-28  Roman Gareev  <gareevroman@gmail.com>
+
+	* graphite-isl-ast-to-gimple.c:
+	(graphite_create_new_guard): New function.
+	(translate_isl_ast_node_if): New function.
+	(translate_isl_ast): Add calling of translate_isl_ast_node_if.
+
+	* gcc.dg/graphite/isl-ast-gen-if-1.c: New testcase.
+
 2014-07-27  Anthony Green  <green@moxielogic.com>
 
 	* config.gcc: Add moxie-*-moxiebox* configuration.
diff --git a/gcc/graphite-isl-ast-to-gimple.c b/gcc/graphite-isl-ast-to-gimple.c
index 77b5ed4afe1..b5631ca6fba 100644
--- a/gcc/graphite-isl-ast-to-gimple.c
+++ b/gcc/graphite-isl-ast-to-gimple.c
@@ -645,6 +645,43 @@ translate_isl_ast_node_block (loop_p context_loop,
   isl_ast_node_list_free (node_list);
   return next_e;
 }
+ 
+/* Creates a new if region corresponding to ISL's cond.  */
+
+static edge
+graphite_create_new_guard (edge entry_edge, __isl_take isl_ast_expr *if_cond,
+			   ivs_params &ip)
+{
+  tree type =
+    build_nonstandard_integer_type (graphite_expression_type_precision, 0);
+  tree cond_expr = gcc_expression_from_isl_expression (type, if_cond, ip);
+  edge exit_edge = create_empty_if_region_on_edge (entry_edge, cond_expr);
+  return exit_edge;
+}
+
+/* Translates an isl_ast_node_if to Gimple.  */
+
+static edge
+translate_isl_ast_node_if (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_if);
+  isl_ast_expr *if_cond = isl_ast_node_if_get_cond (node);
+  edge last_e = graphite_create_new_guard (next_e, if_cond, ip);
+
+  edge true_e = get_true_edge_from_guard_bb (next_e->dest);
+  isl_ast_node *then_node = isl_ast_node_if_get_then (node);
+  translate_isl_ast (context_loop, then_node, true_e, ip);
+  isl_ast_node_free (then_node);
+
+  edge false_e = get_false_edge_from_guard_bb (next_e->dest);
+  isl_ast_node *else_node = isl_ast_node_if_get_else (node);
+  if (isl_ast_node_get_type (else_node) != isl_ast_node_error)
+    translate_isl_ast (context_loop, else_node, false_e, ip);
+  isl_ast_node_free (else_node);
+  return last_e;
+}
 
 /* Translates an ISL AST node NODE to GCC representation in the
    context of a SESE.  */
@@ -663,7 +700,8 @@ translate_isl_ast (loop_p context_loop, __isl_keep isl_ast_node *node,
 					 next_e, ip);
 
     case isl_ast_node_if:
-      return next_e;
+      return translate_isl_ast_node_if (context_loop, node,
+					next_e, ip);
 
     case isl_ast_node_user:
       return translate_isl_ast_node_user (node, next_e, ip);
diff --git a/gcc/testsuite/gcc.dg/graphite/isl-ast-gen-if-1.c b/gcc/testsuite/gcc.dg/graphite/isl-ast-gen-if-1.c
new file mode 100644
index 00000000000..867b84e8359
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/graphite/isl-ast-gen-if-1.c
@@ -0,0 +1,37 @@
+/* { dg-do run } */
+/* { dg-options "-O2 -fgraphite-identity -fgraphite-code-generator=isl" } */
+
+int st = 1;
+static void __attribute__((noinline))
+foo (int a[], int n)
+{
+  int i;
+  for (i = 0; i < n; i++)
+    {
+      if (i < 25)
+        a[i] = i;
+      a[n - i] = 1;
+    }
+}
+
+static int __attribute__((noinline))
+array_sum (int a[])
+{
+  int i, res = 0;
+  for(i = 0; i < 50; i += st)
+    res += a[i];
+  return res;
+}
+
+extern void abort ();
+
+int
+main (void)
+{
+  int a[50];
+  foo (a, 50);
+  int res = array_sum (a);
+  if (res != 49)
+    abort ();
+  return 0;
+}
-- 
2.30.2