gccrs: Memoize Backend::wchar_type

gcc/rust/ChangeLog:

	* rust-gcc.cc
	(Backend::wchar_type): Store static wchar tree.

Signed-off-by: Owen Avery <powerboat9.gamer@gmail.com>

diff --git a/gcc/rust/rust-gcc.cc b/gcc/rust/rust-gcc.cc
index be6e4ae5498fe368ea2a09db019b0c54a6ce42d5..73c966a3320cb431520fd769861663244f5d22b7 100644 (file)
--- a/gcc/rust/rust-gcc.cc
+++ b/gcc/rust/rust-gcc.cc
@@ -345,8 +345,14 @@ get_identifier_node (const std::string &str)
 tree
 wchar_type ()
 {
-  tree wchar = make_unsigned_type (32);
-  TYPE_STRING_FLAG (wchar) = 1;
+  static tree wchar;
+
+  if (wchar == NULL_TREE)
+    {
+      wchar = make_unsigned_type (32);
+      TYPE_STRING_FLAG (wchar) = 1;
+    }
+
   return wchar;
 }