Improve the generated code for the instanceof operator.

src/codegen-arm.cc

Index: src/codegen-arm.cc
===================================================================
--- src/codegen-arm.cc	(revision 469)
+++ src/codegen-arm.cc	(working copy)
@@ -887,8 +887,6 @@
   Major MajorKey() { return GetProperty; }
   int MinorKey() { return 0; }
   void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "GetPropertyStub"; }
 };
 
 
@@ -900,8 +898,6 @@
   Major MajorKey() { return SetProperty; }
   int MinorKey() { return 0; }
   void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "GetPropertyStub"; }
 };
 
 
@@ -951,8 +947,6 @@
   int MinorKey() { return (argc_ << 3) | static_cast<int>(kind_); }
   void Generate(MacroAssembler* masm);
 
-  const char* GetName() { return "InvokeBuiltinStub"; }
-
 #ifdef DEBUG
   void Print() {
     PrintF("InvokeBuiltinStub (kind %d, argc, %d)\n",
@@ -1294,8 +1288,6 @@
  private:
   int argc_;
 
-  const char* GetName() { return "CallFuntionStub"; }
-
 #if defined(DEBUG)
   void Print() { PrintF("CallFunctionStub (argc %d)\n", argc_); }
 #endif  // defined(DEBUG)
@@ -3386,7 +3378,8 @@
     case Token::INSTANCEOF:
       __ mov(r0, Operand(1));  // not counting receiver
       __ InvokeBuiltin(Builtins::INSTANCE_OF, CALL_JS);
-      __ push(r0);
+      __ tst(r0, Operand(r0));
+      cc_reg_ = eq;
       break;
 
     default: