'simplify' - simplifies expressions
Simplification pass includes the following:
* Simplification of arithmetic expressions * Copy and constant propagation * Constant folding * Subexpression re-association * Simplification of trivial branches
header file: http://svn.apache.org/viewvc/harmony/enhanced/drlvm/trunk/vm/jitrino/src/optimizer/simplifier.h
implementation file: http://svn.apache.org/viewvc/harmony/enhanced/drlvm/trunk/vm/jitrino/src/optimizer/simplifier.cpp