OpenJIT Compiler System (3)
	n OpenJIT Frontend System u Preprocessor for Backend System F Java class framework for JIT-optimizer and/or JIT-customizer, on Java bytecode or higher-level Intermediate Representation (e.g. Backend RTL) u Classfile Annotation support F Embed various information to classfiles, and utilize them at JIT- compile phase n OpenJIT Backend System u Compact and efficient Java JIT Compiler written in Java itself u Microscopic optimization on RTL F stack-to-register allocation F peephole optimization