codegen: Add and use CCodeConstantIdentifier for accessing constants

If an address to a constant value is required then its identifier needs
to be used instead of referring to a temporary copy.

Fixes a regression of f1a8f2a4c6771124abd61fd0ebfa991c846575fe

Found by -fsanitize=address

2 files changed, 36 insertions, 0 deletions

diff --git a/ccode/Makefile.am b/ccode/Makefile.am
index 9ba660760..c87c5dd1d 100644
--- a/ccode/Makefile.am
+++ b/ccode/Makefile.am
@@ -28,6 +28,7 @@ libvalaccode_la_VALASOURCES = \
 	valaccodecomment.vala \
 	valaccodeconditionalexpression.vala \
 	valaccodeconstant.vala \
+	valaccodeconstantidentifier.vala \
 	valaccodecontinuestatement.vala \
 	valaccodedeclaration.vala \
 	valaccodedeclarator.vala \
diff --git a/ccode/valaccodeconstantidentifier.vala b/ccode/valaccodeconstantidentifier.vala
new file mode 100644
index 000000000..0495389f1
--- /dev/null
+++ b/ccode/valaccodeconstantidentifier.vala
@@ -0,0 +1,35 @@
+/* valaccodeconstantidentifier.vala
+ *
+ * Copyright (C) 2021  Rico Tzschichholz
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+
+ * This library 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
+ * Lesser General Public License for more details.
+
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
+ *
+ * Author:
+ * 	Rico Tzschichholz <ricotz@ubuntu.com>
+ */
+
+using GLib;
+
+/**
+ * Represents a constant identifier in the C code.
+ */
+public class Vala.CCodeConstantIdentifier : CCodeIdentifier {
+	/**
+	 * The name of this constant identifier.
+	 */
+	public CCodeConstantIdentifier (string name) {
+		base (name);
+	}
+}