Summary: fixed few addP node type and narrow oop type problems.
Reviewed-by: rasbold, never

Summary: Switch off executing Escape Analysis by default for now
Reviewed-by: rasbold

Summary: add safepoint before popping expression stack, not after
Reviewed-by: kvn

Summary: Escape Analysis fixes.
Reviewed-by: never, rasbold

Summary: Add mechanism to ignore unsupported flags for a set period of time
Reviewed-by: acorn, never, coleenp

Summary: SS12 C++ tripped over new templates usage in instanceKlass.cpp.
Reviewed-by: never

Summary: partial peeling shouldn't place clones into loop
Reviewed-by: kvn

6712835: Server compiler fails with assertion (loop_count < K,"infinite loop in PhaseIterGVN::transform")
Reviewed-by: kvn

Reviewed-by: kvn

Summary: make do_ifnull() handling similar to do_if()
Reviewed-by: jrose, kvn

Summary: allocate alignment-sized page(s) below java heap so that memory accesses at heap_base+1page give signal and cause an implicit null check
Reviewed-by: kvn, jmasa, phh, jcoomes