* src/vm/jit/alpha/emit.c (vm/options.h): Added.

* src/vm/jit/alpha/emit.c (vm/options.h): Added.
(emit_arrayindexoutofbounds_check): New function.
(emit_arraystore_check): Likewise.
(emit_classcast_check): Likewise.
(emit_classcast_check): Likewise.
(emit_nullpointer_check): Likewise.

* src/vm/jit/alpha/codegen.c (codegen): Removed patch-NOPs generation,
replaced gen_nullptr_check with emit_nullpointer_check.
(createnativestub): Removed patch-NOPs generation.

* src/vm/jit/alpha/codegen.h (gen_nullptr_check): Removed.
(PATCHER_NOPS): Added.

* src/vm/jit/alpha/patcher.c (patcher_get_putfield): Use opt_shownops
instead of opt_showdisassemble.
(patcher_invokevirtual): Likewise.
(patcher_invokeinterface): Likewise.
(patcher_checkcast_instanceof_interface): Likewise.

* src/vm/jit/emit-common.c (emit_array_checks): Added [__ALPHA__].
* src/vm/jit/codegen-common.c (codegen_add_patch_ref): Likewise.