org.jruby.compiler
Interfaces 
ArgumentsCallback
ArrayCallback
BranchCallback
CacheCompiler
CompilerCallback
InvocationCompiler
MethodCompiler
ScriptCompiler
VariableCompiler
Classes 
ASTCompiler
ASTInspector
JITCompiler
JITCompiler.JITClassGenerator
YARVNodesCompiler
Exceptions 
NotCompilableException