These are the refereed proceedings of the 9th International Conference on Compiler Construction, CC 2000, held as part of ETAPS 2000 in Berlin, Germany in March/April 2000. The 18 revised full papers presented together with one invited paper were reviewed and selected from a total of 46 submissions. Among the topics covered are shape analysis, code optimization, Java virtual machine interpreters, stock allocation, loop processing, compiler optimization, run-time parallelization, automata implementation, partial evaluation and attribute evaluation.