Summary: Add missing _instance_id settings and other EA fixes.
Reviewed-by: rasbold

Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell

Summary: Set instance_id to InstanceBot for InstPtr->meet(AryPtr) when types are not related.
Reviewed-by: jrose, never

Summary: Remove DecodeNNode::decode() and EncodePNode::encode() methods.
Reviewed-by: rasbold, never

Reviewed-by: kvn, jrose, rasbold

Summary: fix several problems in C2 related to Escape Analysis and Compressed Oops.
Reviewed-by: never, jrose

Summary: NeverBranchNodes aren't handled properly
Reviewed-by: kvn, sgoldman, rasbold, jrose

Summary: EA and initialization optimizations could bypass these nodes.
Reviewed-by: rasbold, never

Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold

Summary: EA gives opportunite to do more aggressive memory optimizations.
Reviewed-by: never, jrose