Preparser: new pass to order var_decls prior to parser

tests/unit/test_preparser.c

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+/* Copyright 2014 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "globals.h"
+#include "mem-allocator.h"
+#include "opcodes.h"
+#include "deserializer.h"
+#include "common.h"
+#include "parser.h"
+#include "jerry-libc.h"
+
+/**
+ * Unit test's main function.
+ */
+int
+main( int __unused argc,
+      char __unused **argv)
+{
+  char program[] = {'a','=','1',';','v','a','r',' ','a',';','\0'};
+  bool is_ok;
+
+  mem_init();
+  deserializer_init ();
+  parser_init (program, __strlen (program), true);
+  parser_parse_program ();
+  parser_free ();
+
+  if (!opcodes_equal(deserialize_bytecode (), (opcode_t[]) {
+    [0] = getop_reg_var_decl (1, 2),    // var tmp1 .. tmp2;
+    [1] =          getop_nop (),        // ;
+    [2] =     getop_var_decl (0),       // var a;
+    [3] =   getop_assignment (1, 1, 1), // tmp1 = 1: SMALLINT;
+    [4] =   getop_assignment (0, 4, 1), // a = tmp1: TYPEOF(tmp1);
+    [5] =      getop_exitval (0)        // exit 0;
+  }, 6))
+  {
+    is_ok = false;
+  }
+  else
+  {
+    is_ok = true;
+  }
+
+  deserializer_free ();
+  mem_finalize (false);
+
+  return (is_ok ? 0 : 1);
+} /* main */