* icf.cc (get_section_contents): Use references to reloc_info
	vectors to avoid copies.

Index: icf.cc
===================================================================
RCS file: /cvs/src/src/gold/icf.cc,v
retrieving revision 1.21
diff -u -p -r1.21 icf.cc
--- icf.cc	15 Mar 2013 07:51:32 -0000	1.21
+++ icf.cc	2 Apr 2014 19:08:28 -0000
@@ -269,15 +269,15 @@ get_section_contents(bool first_iteratio
 
   if (it_reloc_info_list != reloc_info_list.end())
     {
-      Icf::Sections_reachable_info v =
+      Icf::Sections_reachable_info &v =
         (it_reloc_info_list->second).section_info;
       // Stores the information of the symbol pointed to by the reloc.
-      Icf::Symbol_info s = (it_reloc_info_list->second).symbol_info;
+      Icf::Symbol_info &s = (it_reloc_info_list->second).symbol_info;
       // Stores the addend and the symbol value.
-      Icf::Addend_info a = (it_reloc_info_list->second).addend_info;
+      Icf::Addend_info &a = (it_reloc_info_list->second).addend_info;
       // Stores the offset of the reloc.
-      Icf::Offset_info o = (it_reloc_info_list->second).offset_info;
-      Icf::Reloc_addend_size_info reloc_addend_size_info =
+      Icf::Offset_info &o = (it_reloc_info_list->second).offset_info;
+      Icf::Reloc_addend_size_info &reloc_addend_size_info =
         (it_reloc_info_list->second).reloc_addend_size_info;
       Icf::Sections_reachable_info::iterator it_v = v.begin();
       Icf::Symbol_info::iterator it_s = s.begin();