gccrs: forever stack: Improve resolve_path implementation

gcc/rust/ChangeLog:

	* resolve/rust-forever-stack.hxx: Do not copy segment when
	dereferencing iterator in `find_starting_point`.

diff --git a/gcc/rust/resolve/rust-forever-stack.hxx b/gcc/rust/resolve/rust-forever-stack.hxx
index 8f0ab66b18b7010b25c98fa375d732cfc06dbb71..642135cda8542cd68463db432c9af102f5162d27 100644 (file)
--- a/gcc/rust/resolve/rust-forever-stack.hxx
+++ b/gcc/rust/resolve/rust-forever-stack.hxx
@@ -333,7 +333,7 @@ ForeverStack<N>::find_starting_point (const std::vector<S> &segments,
 
   for (; !is_last (iterator, segments); iterator++)
     {
-      auto seg = *iterator;
+      auto &seg = *iterator;
       auto is_self_or_crate
        = seg.is_crate_path_seg () || seg.is_lower_self_seg ();