Summary: CmpP could be optimized out if it compares new allocated objects.
Reviewed-by: jrose, never, rasbold

Summary: set_req_X() puts dependent nodes on IGVN worklist which allows to improve graph and gives more opportunities for EA scalar replacement.
Reviewed-by: jrose, never

Summary: A mergemem node could be not in worklist_store but in should_not_repeat vectorset since it was processed and removed from worklist_store before.
Reviewed-by: jrose, never

Summary: T_ADDRESS size is defined as 'int' size (4 bytes) but C2 use it for raw pointers and as memory type for StoreP and LoadP nodes.
Reviewed-by: jrose

Summary: AdapterHandlerLibrary::get_create_adapter_index() returns incorrect value (-2) when CodeCache is full.
Reviewed-by: sgoldman

Summary: A node is not processed in dump_nodes() if it was visited during processing previous inputs.
Reviewed-by: rasbold

Summary: '* HeapWordSize' is missing in GraphKit::set_output_for_allocation()
Reviewed-by: rasbold, jrose, never

Reviewed-by: kvn, rasbold