A64: Synchronize with r15814.

src/a64/stub-cache-a64.cc

Index: src/a64/stub-cache-a64.cc
diff --git a/src/a64/stub-cache-a64.cc b/src/a64/stub-cache-a64.cc
index e9c67c78746d97d16668c989fb05a368b269f19c..f6c2d398058f140c8283e6f5d0785fc29d3eaf17 100644
--- a/src/a64/stub-cache-a64.cc
+++ b/src/a64/stub-cache-a64.cc
@@ -1205,6 +1205,10 @@ Register StubCompiler::CheckPrototypes(Handle<JSObject> object,
                                        int save_at_depth,
                                        Label* miss,
                                        PrototypeCheckType check) {
+  // Make sure that the type feedback oracle harvests the receiver map.
+  // TODO(svenpanne) Remove this hack when all ICs are reworked.
+  __ Mov(scratch1, Operand(Handle<Map>(object->map())));
+
   Handle<JSObject> first = object;
 
   // object_reg and holder_reg registers can alias.