Fix bug in propagation of type information into registers....

src/x64/register-allocator-x64.cc

Index: src/x64/register-allocator-x64.cc
===================================================================
--- src/x64/register-allocator-x64.cc	(revision 4153)
+++ src/x64/register-allocator-x64.cc	(working copy)
@@ -44,6 +44,7 @@
     ASSERT(fresh.is_valid());
     CodeGeneratorScope::Current()->masm()->Move(fresh.reg(), handle());
     // This result becomes a copy of the fresh one.
+    fresh.set_number_info(number_info());
     *this = fresh;
   }
   ASSERT(is_register());
@@ -61,6 +62,7 @@
       ASSERT(is_constant());
       CodeGeneratorScope::Current()->masm()->Move(fresh.reg(), handle());
     }
+    fresh.set_number_info(number_info());
     *this = fresh;
   } else if (is_register() && reg().is(target)) {
     ASSERT(CodeGeneratorScope::Current()->has_valid_frame());