%% -*- erlang-indent-level: 2 -*-
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2005-2016. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
-module(hipe_arm_finalise).
-export([finalise/1]).
-include("hipe_arm.hrl").
finalise(Defun) ->
#defun{code=Code0} = Defun,
Code1 = peep(expand(Code0)),
Defun#defun{code=Code1}.
expand(Insns) ->
expand_list(Insns, []).
expand_list([I|Insns], Accum) ->
expand_list(Insns, expand_insn(I, Accum));
expand_list([], Accum) ->
lists:reverse(Accum).
expand_insn(I, Accum) ->
case I of
#pseudo_bc{'cond'=Cond,true_label=TrueLab,false_label=FalseLab} ->
[hipe_arm:mk_b_label(FalseLab),
hipe_arm:mk_b_label(Cond, TrueLab) |
Accum];
#pseudo_blr{} ->
[hipe_arm:mk_move(hipe_arm:mk_pc(), hipe_arm:mk_lr()) | Accum];
#pseudo_bx{src=Src} ->
[hipe_arm:mk_move(hipe_arm:mk_pc(), Src) | Accum];
#pseudo_call{funv=FunV,sdesc=SDesc,contlab=ContLab,linkage=Linkage} ->
[hipe_arm:mk_b_label(ContLab),
case FunV of
#arm_temp{} -> hipe_arm:mk_blx(FunV, SDesc);
_ -> hipe_arm:mk_bl(FunV, SDesc, Linkage)
end |
Accum];
#pseudo_switch{jtab=JTab,index=Index} ->
PC = hipe_arm:mk_pc(),
Am2 = hipe_arm:mk_am2(JTab, '+', {Index,'lsl',2}),
[hipe_arm:mk_load('ldr', PC, Am2) | Accum];
#pseudo_tailcall_prepare{} ->
Accum;
_ ->
[I|Accum]
end.
peep(Insns) ->
peep_list(Insns, []).
peep_list([#b_label{'cond'='al',label=Label} | (Insns = [#label{label=Label}|_])], Accum) ->
peep_list(Insns, Accum);
peep_list([I|Insns], Accum) ->
peep_list(Insns, [I|Accum]);
peep_list([], Accum) ->
lists:reverse(Accum).
