Add monomorphic CompareNilICs and Crankshaft support

src/compiler.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 129 matching lines @@
     return scope()->num_heap_slots();
   }
 }
 
 
 Code::Flags CompilationInfo::flags() const {
   if (IsStub()) {
     return Code::ComputeFlags(code_stub()->GetCodeKind(),
                               code_stub()->GetICState(),
                               code_stub()->GetExtraICState(),
-                              Code::NORMAL,
-                              0);
+                              Code::NORMAL, -1);
   } else {
     return Code::ComputeFlags(Code::OPTIMIZED_FUNCTION);
   }
 }
 
 
 // Disable optimization for the rest of the compilation pipeline.
 void CompilationInfo::DisableOptimization() {
   bool is_optimizable_closure =
     FLAG_optimize_closures &&
@@ skipping 1003 matching lines @@
     }
   }
 
   GDBJIT(AddCode(Handle<String>(shared->DebugName()),
                  Handle<Script>(info->script()),
                  Handle<Code>(info->code()),
                  info));
 }
 
 } }  // namespace v8::internal