Reviewed-by: kvn, vlivanov, dlong, rhalade, mschoene, iignatyev

Reviewed-by: kvn, vlivanov, dlong, rhalade, mschoene, iignatyev

Reviewed-by: tschatzl, kvn
Contributed-by: NLeslie Zhai <lesliezhai-hotspot@llvm.org.cn>

Summary: Node::depends_only_on_test() should return false for Unsafe loads
Reviewed-by: kvn, adinn

8043029: Change 8037816 breaks HS build with older GCC versions which don't support diagnostic pragmas
8043164: Format warning in traceStream.hpp
Summary: Backport of main fix + two corrections, enables clang compilation, turns on format attributes, corrects/mutes warnings
Reviewed-by: kvn, coleenp, iveresov, twisti

Summary: Copyright year updated for files modified during 2013
Reviewed-by: twisti, iveresov

Summary: type information gets lost because replace_in_map() doesn't update parent maps
Reviewed-by: kvn, twisti

Summary: Resurrected autobox elimination code and enabled part of it by default.
Reviewed-by: roland, twisti

Summary: Update copyright year to 2012 for relevant files
Reviewed-by: dholmes, coleenp

Summary: Deleted placement new operator of Node - node(size_t, Compile *, int).
Reviewed-by: kvn, twisti
Contributed-by: bharadwaj.yadavalli@oracle.com

Summary: replace frequent C2 optimizer code patterns with new methods calls
Reviewed-by: kvn, twisti
Contributed-by: vladimir.x.ivanov@oracle.com

Summary: Use cl->is_valid_counted_loop() check.
Reviewed-by: never

Summary: Removed predicate cloning from loop peeling optimization and from split fall-in paths.
Reviewed-by: never

Summary: Do not move data nodes which are attached to a predicate test to a dominating test.
Reviewed-by: never

Summary: Fix integer overflow problem in the code generated by loop optimizer.
Reviewed-by: never

Reviewed-by: kvn, twisti

Summary: Clone loop predicate for clonned loops
Reviewed-by: never