1 files changed, 112 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/fortran/convert.c b/gcc-4.9/gcc/fortran/convert.c
new file mode 100644
index 000000000..34c52c810
--- /dev/null
+++ b/gcc-4.9/gcc/fortran/convert.c
@@ -0,0 +1,112 @@
+/* Data type conversion
+   Copyright (C) 1987-2014 Free Software Foundation, Inc.
+
+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/>.  */
+
+
+/* This file contains the functions for converting expressions to
+   different data types for the translation of the gfortran internal
+   representation to GIMPLE.  The only entry point is `convert'.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tree.h"
+#include "convert.h"
+
+/* Prepare expr to be an argument of a TRUTH_NOT_EXPR,
+   or validate its data type for a GIMPLE `if' or `while' statement.
+
+   The resulting type should always be `boolean_type_node'.  */
+
+static tree
+truthvalue_conversion (tree expr)
+{
+  switch (TREE_CODE (TREE_TYPE (expr)))
+    {
+    case BOOLEAN_TYPE:
+      if (TREE_TYPE (expr) == boolean_type_node)
+	return expr;
+      else if (COMPARISON_CLASS_P (expr))
+	{
+	  TREE_TYPE (expr) = boolean_type_node;
+	  return expr;
+	}
+      else if (TREE_CODE (expr) == NOP_EXPR)
+        return fold_build1_loc (input_location, NOP_EXPR,
+			    boolean_type_node, TREE_OPERAND (expr, 0));
+      else
+        return fold_build1_loc (input_location, NOP_EXPR, boolean_type_node,
+				expr);
+
+    case INTEGER_TYPE:
+      if (TREE_CODE (expr) == INTEGER_CST)
+	return integer_zerop (expr) ? boolean_false_node : boolean_true_node;
+      else
+        return fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
+				expr, build_int_cst (TREE_TYPE (expr), 0));
+
+    default:
+      gcc_unreachable ();
+    }
+}
+
+/* Create an expression whose value is that of EXPR,
+   converted to type TYPE.  The TREE_TYPE of the value
+   is always TYPE.  This function implements all reasonable
+   conversions; callers should filter out those that are
+   not permitted by the language being compiled.  */
+
+tree
+convert (tree type, tree expr)
+{
+  tree e = expr;
+  enum tree_code code;
+
+  if (type == TREE_TYPE (expr))
+    return expr;
+
+  if (TREE_CODE (type) == ERROR_MARK
+      || TREE_CODE (expr) == ERROR_MARK
+      || TREE_CODE (TREE_TYPE (expr)) == ERROR_MARK)
+    return expr;
+
+  gcc_checking_assert (TREE_CODE (TREE_TYPE (expr)) != VOID_TYPE);
+
+  if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (expr)))
+    return fold_build1_loc (input_location, NOP_EXPR, type, expr);
+
+  code = TREE_CODE (type);
+  if (code == VOID_TYPE)
+    return fold_build1_loc (input_location, CONVERT_EXPR, type, e);
+  if (code == BOOLEAN_TYPE)
+    return fold_build1_loc (input_location, NOP_EXPR, type,
+			    truthvalue_conversion (e));
+  if (code == INTEGER_TYPE)
+    return fold (convert_to_integer (type, e));
+  if (code == POINTER_TYPE || code == REFERENCE_TYPE)
+    return fold (convert_to_pointer (type, e));
+  if (code == REAL_TYPE)
+    return fold (convert_to_real (type, e));
+  if (code == COMPLEX_TYPE)
+    return fold (convert_to_complex (type, e));
+  if (code == VECTOR_TYPE)
+    return fold (convert_to_vector (type, e));
+
+  gcc_unreachable ();
+}
+