Fixed type feedback in presence of negative lookups.

src/mips/stub-cache-mips.cc

Index: src/mips/stub-cache-mips.cc
diff --git a/src/mips/stub-cache-mips.cc b/src/mips/stub-cache-mips.cc
index b7ffb4f202a71b5d7c92f5303c447c281033e936..d903e572003054fffde3ae74e646d3753c229bb2 100644
--- a/src/mips/stub-cache-mips.cc
+++ b/src/mips/stub-cache-mips.cc
@@ -1192,6 +1192,9 @@ 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.
+  __ li(scratch1, Operand(Handle<Map>(object->map())));
+
   Handle<JSObject> first = object;
   // Make sure there's no overlap between holder and object registers.
   ASSERT(!scratch1.is(object_reg) && !scratch1.is(holder_reg));