8042052: assert(t != NULL) failed: must set before get Summary: Added missing call to _gvn.transform to make sure the type of the PhiNode is recorded in the gvn. Reviewed-by: kvn Contributed-by: Tobias Hartmann <tobias.hartmann@oracle.com>

Merge

8039298: assert(base == NULL || t_adr->isa_rawptr() || !phase->type(base)->higher_equal(TypePtr::NULL_PTR)) Summary: Convert the assert into the runtime check to skip IGVN optimizations for problematic memory nodes. Eliminate dead nodes more aggressively. Reviewed-by: twisti, iveresov