Request for reviews (L): 7004535: Clone loop predicates when loop is cloned
vladimir.kozlov at oracle.com
Thu Mar 24 19:07:54 PDT 2011
Second loop opts changes.
Fixed 7004535: Clone loop predicates when loop is cloned
Currently loop predicates generated during parsing could be separated from loops
when loops are cloned. As result such predicates are removed. There could be
more optimization opportunities if loop predicates are also cloned in such
Loop predicate code become big so I moved it into new file loopPredicate.cpp.
I separated the cloning code for IdealLoop and IterGVN. The generated Ideal
code is the same but registration of new Ideal nodes is different enough to
have separate methods, I think. I welcome any suggestions to improve this code.
Keep loop predicates after CCP and perform optimizations with them until no more
loop optimizations could be done. After that switch them off and do more loop
VectorNode missed size_of() method as result it was cloned incorrectly.
Added TraceLoopOpts outputs I missed in previous changes.
Tested: ctw, nsk, jprt
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