%% -*- 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_specific).
%% for hipe_coalescing_regalloc:
-export([number_of_temporaries/1
,analyze/1
,labels/1
,all_precoloured/0
,bb/2
,liveout/2
,reg_nr/1
,def_use/1
,is_move/1
,is_precoloured/1
,var_range/1
,allocatable/0
,non_alloc/1
,physical_name/1
,reverse_postorder/1
,livein/2
,uses/1
,defines/1
,defines_all_alloc/1
]).
%% for hipe_graph_coloring_regalloc:
-export([is_fixed/1]).
%% for hipe_ls_regalloc:
-export([args/1, is_arg/1, is_global/1, new_spill_index/1]).
-export([breadthorder/1, postorder/1]).
%% callbacks for hipe_regalloc_loop
-export([check_and_rewrite/2]).
%% callbacks for hipe_regalloc_prepass
-export([new_reg_nr/0,
update_reg_nr/2,
update_bb/3,
subst_temps/2]).
check_and_rewrite(CFG, Coloring) ->
hipe_arm_ra_postconditions:check_and_rewrite(CFG, Coloring, 'normal').
reverse_postorder(CFG) ->
hipe_arm_cfg:reverse_postorder(CFG).
non_alloc(CFG) ->
non_alloc(hipe_arm_registers:nr_args(), hipe_arm_cfg:params(CFG)).
%% same as hipe_arm_frame:fix_formals/2
non_alloc(0, Rest) -> Rest;
non_alloc(N, [_|Rest]) -> non_alloc(N-1, Rest);
non_alloc(_, []) -> [].
%% Liveness stuff
analyze(CFG) ->
hipe_arm_liveness_gpr:analyse(CFG).
livein(Liveness,L) ->
[X || X <- hipe_arm_liveness_gpr:livein(Liveness,L),
hipe_arm:temp_is_allocatable(X)].
liveout(BB_in_out_liveness,Label) ->
[X || X <- hipe_arm_liveness_gpr:liveout(BB_in_out_liveness,Label),
hipe_arm:temp_is_allocatable(X)].
%% Registers stuff
allocatable() ->
hipe_arm_registers:allocatable_gpr().
all_precoloured() ->
hipe_arm_registers:all_precoloured().
is_precoloured(Reg) ->
hipe_arm_registers:is_precoloured_gpr(Reg).
is_fixed(R) ->
hipe_arm_registers:is_fixed(R).
physical_name(Reg) ->
Reg.
%% CFG stuff
labels(CFG) ->
hipe_arm_cfg:labels(CFG).
var_range(_CFG) ->
hipe_gensym:var_range(arm).
number_of_temporaries(_CFG) ->
Highest_temporary = hipe_gensym:get_var(arm),
%% Since we can have temps from 0 to Max adjust by +1.
Highest_temporary + 1.
bb(CFG,L) ->
hipe_arm_cfg:bb(CFG,L).
update_bb(CFG,L,BB) ->
hipe_arm_cfg:bb_add(CFG,L,BB).
%% ARM stuff
def_use(Instruction) ->
{defines(Instruction), uses(Instruction)}.
uses(I) ->
[X || X <- hipe_arm_defuse:insn_use_gpr(I),
hipe_arm:temp_is_allocatable(X)].
defines(I) ->
[X || X <- hipe_arm_defuse:insn_def_gpr(I),
hipe_arm:temp_is_allocatable(X)].
defines_all_alloc(I) ->
hipe_arm_defuse:insn_defs_all_gpr(I).
is_move(Instruction) ->
case hipe_arm:is_pseudo_move(Instruction) of
true ->
Dst = hipe_arm:pseudo_move_dst(Instruction),
case hipe_arm:temp_is_allocatable(Dst) of
false -> false;
_ ->
Src = hipe_arm:pseudo_move_src(Instruction),
hipe_arm:temp_is_allocatable(Src)
end;
false -> false
end.
reg_nr(Reg) ->
hipe_arm:temp_reg(Reg).
new_reg_nr() ->
hipe_gensym:get_next_var(arm).
update_reg_nr(Nr, Temp) ->
hipe_arm:mk_temp(Nr, hipe_arm:temp_type(Temp)).
subst_temps(SubstFun, Instr) ->
hipe_arm_subst:insn_temps(
fun(Op) ->
case hipe_arm:temp_is_allocatable(Op) of
true -> SubstFun(Op);
false -> Op
end
end, Instr).
%%% Linear Scan stuff
new_spill_index(SpillIndex) when is_integer(SpillIndex) ->
SpillIndex+1.
breadthorder(CFG) ->
hipe_arm_cfg:breadthorder(CFG).
postorder(CFG) ->
hipe_arm_cfg:postorder(CFG).
is_global(R) ->
R =:= hipe_arm_registers:temp1() orelse
R =:= hipe_arm_registers:temp2() orelse
R =:= hipe_arm_registers:temp3() orelse
hipe_arm_registers:is_fixed(R).
is_arg(R) ->
hipe_arm_registers:is_arg(R).
args(CFG) ->
hipe_arm_registers:args(hipe_arm_cfg:arity(CFG)).
