MIPS: Add monomorphic CompareNilICs and Crankshaft support

src/mips/code-stubs-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 79 matching lines @@
     CodeStubInterfaceDescriptor* descriptor) {
   static Register registers[] = { a0, a1 };
   descriptor->register_param_count_ = 2;
   descriptor->register_params_ = registers;
   Address entry =
       Runtime::FunctionForId(Runtime::kTransitionElementsKind)->entry;
   descriptor->deoptimization_handler_ = FUNCTION_ADDR(entry);
 }
 
 
+void CompareNilICStub::InitializeInterfaceDescriptor(
+    Isolate* isolate,
+    CodeStubInterfaceDescriptor* descriptor) {
+  static Register registers[] = { a0 };
+  descriptor->register_param_count_ = 1;
+  descriptor->register_params_ = registers;
+  descriptor->deoptimization_handler_ =
+      FUNCTION_ADDR(CompareNilIC_Miss);
+  descriptor->miss_handler_ =
+      ExternalReference(IC_Utility(IC::kCompareNilIC_Miss), isolate);
+}
+
+
 static void InitializeArrayConstructorDescriptor(Isolate* isolate,
     CodeStubInterfaceDescriptor* descriptor) {
   // register state
   // a1 -- constructor function
   // a2 -- type info cell with elements kind
   // a0 -- number of arguments to the constructor function
   static Register registers[] = { a1, a2 };
   descriptor->register_param_count_ = 2;
   // stack param count needs (constructor pointer, and single argument)
   descriptor->stack_parameter_count_ = &a0;
@@ skipping 7437 matching lines @@
   __ Pop(ra, t1, a1);
   __ Ret();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS