diff options
Diffstat (limited to 'lib/hipe/arm/hipe_arm_frame.erl')
| -rw-r--r-- | lib/hipe/arm/hipe_arm_frame.erl | 97 |
1 files changed, 43 insertions, 54 deletions
diff --git a/lib/hipe/arm/hipe_arm_frame.erl b/lib/hipe/arm/hipe_arm_frame.erl index e1e441a967..9a349b47d3 100644 --- a/lib/hipe/arm/hipe_arm_frame.erl +++ b/lib/hipe/arm/hipe_arm_frame.erl @@ -27,16 +27,14 @@ -define(LIVENESS_ALL, hipe_arm_liveness_gpr). % since we have no FP yet -frame(Defun) -> - Formals = fix_formals(hipe_arm:defun_formals(Defun)), - Temps0 = all_temps(hipe_arm:defun_code(Defun), Formals), - MinFrame = defun_minframe(Defun), +frame(CFG) -> + Formals = fix_formals(hipe_arm_cfg:params(CFG)), + Temps0 = all_temps(CFG, Formals), + MinFrame = defun_minframe(CFG), Temps = ensure_minframe(MinFrame, Temps0), - ClobbersLR = clobbers_lr(hipe_arm:defun_code(Defun)), - CFG0 = hipe_arm_cfg:init(Defun), - Liveness = ?LIVENESS_ALL:analyse(CFG0), - CFG1 = do_body(CFG0, Liveness, Formals, Temps, ClobbersLR), - hipe_arm_cfg:linearise(CFG1). + ClobbersLR = clobbers_lr(CFG), + Liveness = ?LIVENESS_ALL:analyse(CFG), + do_body(CFG, Liveness, Formals, Temps, ClobbersLR). fix_formals(Formals) -> fix_formals(hipe_arm_registers:nr_args(), Formals). @@ -51,32 +49,21 @@ do_body(CFG0, Liveness, Formals, Temps, ClobbersLR) -> do_prologue(CFG1, Context). do_blocks(CFG, Context) -> - Labels = hipe_arm_cfg:labels(CFG), - do_blocks(Labels, CFG, Context). + hipe_arm_cfg:map_bbs(fun(Lbl, BB) -> do_block(Lbl, BB, Context) end, CFG). -do_blocks([Label|Labels], CFG, Context) -> +do_block(Label, Block, Context) -> Liveness = context_liveness(Context), LiveOut = ?LIVENESS_ALL:liveout(Liveness, Label), - Block = hipe_arm_cfg:bb(CFG, Label), Code = hipe_bb:code(Block), - NewCode = do_block(Code, LiveOut, Context), - NewBlock = hipe_bb:code_update(Block, NewCode), - NewCFG = hipe_arm_cfg:bb_add(CFG, Label, NewBlock), - do_blocks(Labels, NewCFG, Context); -do_blocks([], CFG, _) -> - CFG. - -do_block(Insns, LiveOut, Context) -> - do_block(Insns, LiveOut, Context, context_framesize(Context), []). + NewCode = do_block(Code, LiveOut, Context, context_framesize(Context), []), + hipe_bb:code_update(Block, NewCode). do_block([I|Insns], LiveOut, Context, FPoff0, RevCode) -> {NewIs, FPoff1} = do_insn(I, LiveOut, Context, FPoff0), do_block(Insns, LiveOut, Context, FPoff1, lists:reverse(NewIs, RevCode)); do_block([], _, Context, FPoff, RevCode) -> FPoff0 = context_framesize(Context), - if FPoff =:= FPoff0 -> []; - true -> exit({?MODULE,do_block,FPoff}) - end, + FPoff0 = FPoff, lists:reverse(RevCode, []). do_insn(I, LiveOut, Context, FPoff) -> @@ -543,39 +530,46 @@ temp_is_pseudo(Temp) -> %%% Detect if a Defun's body clobbers LR. %%% -clobbers_lr(Insns) -> +clobbers_lr(CFG) -> LRreg = hipe_arm_registers:lr(), LRtagged = hipe_arm:mk_temp(LRreg, 'tagged'), LRuntagged = hipe_arm:mk_temp(LRreg, 'untagged'), - clobbers_lr(Insns, LRtagged, LRuntagged). - -clobbers_lr([I|Insns], LRtagged, LRuntagged) -> - Defs = hipe_arm_defuse:insn_def_gpr(I), - case lists:member(LRtagged, Defs) of - true -> true; - false -> - case lists:member(LRuntagged, Defs) of - true -> true; - false -> clobbers_lr(Insns, LRtagged, LRuntagged) - end - end; -clobbers_lr([], _LRtagged, _LRuntagged) -> false. + any_insn(fun(I) -> + Defs = hipe_arm_defuse:insn_def_gpr(I), + lists:member(LRtagged, Defs) + orelse lists:member(LRuntagged, Defs) + end, CFG). + +any_insn(Pred, CFG) -> + %% Abuse fold to do an efficient "any"-operation using nonlocal control flow + FoundSatisfying = make_ref(), + try fold_insns(fun (I, _) -> + case Pred(I) of + true -> throw(FoundSatisfying); + false -> false + end + end, false, CFG) + of _ -> false + catch FoundSatisfying -> true + end. %%% %%% Build the set of all temps used in a Defun's body. %%% -all_temps(Code, Formals) -> - S0 = find_temps(Code, tset_empty()), +all_temps(CFG, Formals) -> + S0 = fold_insns(fun find_temps/2, tset_empty(), CFG), S1 = tset_del_list(S0, Formals), tset_filter(S1, fun(T) -> temp_is_pseudo(T) end). -find_temps([I|Insns], S0) -> +find_temps(I, S0) -> S1 = tset_add_list(S0, hipe_arm_defuse:insn_def_all(I)), - S2 = tset_add_list(S1, hipe_arm_defuse:insn_use_all(I)), - find_temps(Insns, S2); -find_temps([], S) -> - S. + tset_add_list(S1, hipe_arm_defuse:insn_use_all(I)). + +fold_insns(Fun, InitAcc, CFG) -> + hipe_arm_cfg:fold_bbs( + fun(_, BB, Acc0) -> lists:foldl(Fun, Acc0, hipe_bb:code(BB)) end, + InitAcc, CFG). tset_empty() -> gb_sets:new(). @@ -604,16 +598,11 @@ tset_to_list(S) -> %%% in the middle of a tailcall. %%% -defun_minframe(Defun) -> - MaxTailArity = body_mta(hipe_arm:defun_code(Defun), 0), - MyArity = length(fix_formals(hipe_arm:defun_formals(Defun))), +defun_minframe(CFG) -> + MaxTailArity = fold_insns(fun insn_mta/2, 0, CFG), + MyArity = length(fix_formals(hipe_arm_cfg:params(CFG))), erlang:max(MaxTailArity - MyArity, 0). -body_mta([I|Code], MTA) -> - body_mta(Code, insn_mta(I, MTA)); -body_mta([], MTA) -> - MTA. - insn_mta(I, MTA) -> case I of #pseudo_tailcall{arity=Arity} -> |