Reviewed-by: tonyp, iveresov, jmasa, ysr

Summary: For heaps larger than 32Gb, the number of heap regions overflows the data type used to hold the region index in the SparsePRT structure. Changed the region indexes, card indexes, and RSet hash table buckets to ints and added some size overflow guarantees.
Reviewed-by: ysr, tonyp

Summary: Short-circuit gc-a-lot attempts by non-JavaThreads; SkipGCALot c'tor to elide re-entrant gc-a-lot attempts.
Reviewed-by: apetrusenko, jcoomes, jmasa, kamg

Summary: Typo fix
Reviewed-by: jcoomes

Summary: The field is now initialized in the constructor.
Reviewed-by: iveresov, jmasa, johnc

Summary: add a RegisterMap* argument to frame::frame_size() to correctly compute the sender frame
Reviewed-by: never

Reviewed-by: kvn

Summary: Move loop unswitch before maximally unroll
Reviewed-by: never

Summary: Don't place a load below anti-dependent PHI.
Reviewed-by: never, twisti

Reviewed-by: phh, dice, never, swamyv

Summary: Set the control edge for the field _interrupted load in inline_native_isInterrupted().
Reviewed-by: never

Summary: constantPoolOopDesc::copy_cpool_bytes() - do the brute-force search search through 'tbl' when SymbolTable::lookup_only() returns NULL
Reviewed-by: kamg

Reviewed-by: iveresov, tonyp

Summary: During parallel rset updating we have to make sure that the worker ids of the refinement threads do not intersect with the worker ids that can be claimed by the mutator threads.
Reviewed-by: tonyp

Summary: 6797305 handles load widening but no shortening which should be covered here.
Reviewed-by: never, kvn

Summary: With libnuma >1.2 explicity use 1.1 symbols
Reviewed-by: ysr

Summary: Do not mark an allocation as scalar replaceable if its actual type in unknown statically.
Reviewed-by: never

Summary: Check for an object array of interface in CmpPNode::sub().
Reviewed-by: never

6826318: G1: remove traversal-based refinement code
Summary: Removed traversal-based refinement code as it's no longer used. Made the concurrent refinement (queue-based) parallel.
Reviewed-by: tonyp

Summary: Restored os::free_memory() semantics
Reviewed-by: apetrusenko

Reviewed-by: never, kvn

Reviewed-by: never, kvn

6788527: Server vm intermittently fails with assertion "live value must not be garbage" with fastdebug bits
Summary: Cache Jvmti and DTrace flags used by Compiler.
Reviewed-by: never

Summary: Update the HS16 build number to 03
Reviewed-by: jcoomes