[Harmony Wiki] Update of "Jitrino OPT/uce" by Mikhail Fursov

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The following page has been changed by Mikhail Fursov:
http://wiki.apache.org/harmony/Jitrino_OPT/uce

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+ ''' 'uce' ''' - eliminates unreachable code.
+ [[BR]][[BR]]
- The pass detects and removes unreachable code by traversing the control flow graph.
+ The pass detects and removes unreachable code by traversing the Control Flow Graph.
- As dead code eliminator may produce some unreachable code it worth uce follows dce in the HLO path.
+ [[BR]]
+ Due to the fact that [:Jitrino_OPT/dce: dead code eliminator ('dce')] may produce some unreachable code it worth that 'uce' pass follows 'dce' in optimizer's pass