diff options
Diffstat (limited to 'backend')
| -rw-r--r-- | backend/Duplicateaux.ml | 2 | ||||
| -rw-r--r-- | backend/LICMaux.ml | 5 | ||||
| -rw-r--r-- | backend/RTLcommonaux.ml | 90 |
3 files changed, 92 insertions, 5 deletions
diff --git a/backend/Duplicateaux.ml b/backend/Duplicateaux.ml index 324acd99..22bee067 100644 --- a/backend/Duplicateaux.ml +++ b/backend/Duplicateaux.ml @@ -23,6 +23,7 @@ open RTL open Maps open Camlcoq open DebugPrint +open RTLcommonaux let stats_oc = ref None @@ -91,7 +92,6 @@ let write_stats_oc () = end let get_loop_headers = LICMaux.get_loop_headers -let get_some = LICMaux.get_some let rtl_successors = LICMaux.rtl_successors (* Get list of nodes following a BFS of the code *) diff --git a/backend/LICMaux.ml b/backend/LICMaux.ml index b88dbc2d..82e4629f 100644 --- a/backend/LICMaux.ml +++ b/backend/LICMaux.ml @@ -17,16 +17,13 @@ open Kildall;; open HashedSet;; open Inject;; open DebugPrint;; +open RTLcommonaux;; type reg = P.t;; (** get_loop_headers moved from Duplicateaux.ml to LICMaux.ml to prevent cycle dependencies *) type vstate = Unvisited | Processed | Visited -let get_some = function -| None -> failwith "Did not get some" -| Some thing -> thing - let rtl_successors = function | Itailcall _ | Ireturn _ -> [] | Icall(_,_,_,_,n) | Ibuiltin(_,_,_,n) | Inop n | Iop (_,_,_,n) diff --git a/backend/RTLcommonaux.ml b/backend/RTLcommonaux.ml new file mode 100644 index 00000000..0e369d04 --- /dev/null +++ b/backend/RTLcommonaux.ml @@ -0,0 +1,90 @@ +open RTL +open Maps +open Camlcoq +open Registers +open Kildall +open Lattice + +let p2i r = P.to_int r +let i2p i = P.of_int i + +let get_some = function + | None -> failwith "Got None instead of Some _" + | Some thing -> thing + +let successors_inst = function + | Inop n + | Iop (_, _, _, n) + | Iload (_, _, _, _, _, n) + | Istore (_, _, _, _, n) + | Icall (_, _, _, _, n) + | Ibuiltin (_, _, _, n) -> + [ n ] + | Icond (_, _, n1, n2, _) -> [ n1; n2 ] + | Ijumptable (_, l) -> l + | Itailcall _ | Ireturn _ -> [] + +let predicted_successor = function + | Inop n | Iop (_, _, _, n) | Iload (_, _, _, _, _, n) | Istore (_, _, _, _, n) + -> + Some n + | Icall (_, _, _, _, n) | Ibuiltin (_, _, _, n) -> None + | Icond (_, _, n1, n2, p) -> ( + match p with Some true -> Some n1 | Some false -> Some n2 | None -> None) + | Ijumptable _ | Itailcall _ | Ireturn _ -> None + +let non_predicted_successors i = function + | None -> successors_inst i + | Some ps -> List.filter (fun s -> s != ps) (successors_inst i) + +(* adapted from Linearizeaux.get_join_points *) +let get_join_points code entry = + let reached = ref (PTree.map (fun n i -> false) code) in + let reached_twice = ref (PTree.map (fun n i -> false) code) in + let rec traverse pc = + if get_some @@ PTree.get pc !reached then begin + if not (get_some @@ PTree.get pc !reached_twice) then + reached_twice := PTree.set pc true !reached_twice + end else begin + reached := PTree.set pc true !reached; + traverse_succs (successors_inst @@ get_some @@ PTree.get pc code) + end + and traverse_succs = function + | [] -> () + | [pc] -> traverse pc + | pc :: l -> traverse pc; traverse_succs l + in traverse entry; !reached_twice + +let transfer f pc after = let open Liveness in + match PTree.get pc f.fn_code with + | Some i -> + (match i with + | Inop _ -> after + | Iop (_, args, res, _) -> + reg_list_live args (Regset.remove res after) + | Iload (_, _, _, args, dst, _) -> + reg_list_live args (Regset.remove dst after) + | Istore (_, _, args, src, _) -> + reg_list_live args (Regset.add src after) + | Icall (_, ros, args, res, _) -> + reg_list_live args (reg_sum_live ros (Regset.remove res after)) + | Itailcall (_, ros, args) -> + reg_list_live args (reg_sum_live ros Regset.empty) + | Ibuiltin (_, args, res, _) -> + reg_list_live (AST.params_of_builtin_args args) + (reg_list_dead (AST.params_of_builtin_res res) after) + | Icond (_, args, _, _, _) -> + reg_list_live args after + | Ijumptable (arg, _) -> + Regset.add arg after + | Ireturn optarg -> + reg_option_live optarg Regset.empty) + | None -> Regset.empty + +module RegsetLat = LFSet(Regset) + +module DS = Backward_Dataflow_Solver(RegsetLat)(NodeSetBackward) + +let analyze f = + let liveouts = get_some @@ DS.fixpoint f.fn_code successors_instr (transfer f) in + PTree.map (fun n _ -> let lo = PMap.get n liveouts in transfer f n lo) f.fn_code |