%% -*- erlang-indent-level: 2 -*-
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2007-2016. 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_sparc_defuse).
-export([insn_def_all/1, insn_use_all/1]).
-export([insn_def_gpr/1, insn_use_gpr/1]).
-export([insn_def_fpr/1, insn_use_fpr/1]).
-export([insn_defs_all_gpr/1, insn_defs_all_fpr/1]).
-include("hipe_sparc.hrl").
%%%
%%% Defs and uses for both general-purpose and floating-point registers.
%%% This is needed for the frame module, alas.
%%%
insn_def_all(I) ->
addtemps(insn_def_fpr(I), insn_def_gpr(I)).
insn_use_all(I) ->
addtemps(insn_use_fpr(I), insn_use_gpr(I)).
%%%
%%% Defs and uses for general-purpose (integer) registers only.
%%%
insn_def_gpr(I) ->
case I of
#alu{dst=Dst} -> [Dst];
%% #jmpl{} -> [hipe_sparc:mk_ra()]; % XXX: can jmpl occur this early?
#pseudo_call{} -> call_clobbered_gpr();
#pseudo_move{dst=Dst} -> [Dst];
#pseudo_set{dst=Dst} -> [Dst];
#pseudo_tailcall_prepare{} -> tailcall_clobbered_gpr();
#rdy{dst=Dst} -> [Dst];
#sethi{dst=Dst} -> [Dst];
_ -> []
end.
insn_defs_all_gpr(I) ->
case I of
#pseudo_call{} -> true;
_ -> false
end.
call_clobbered_gpr() ->
[hipe_sparc:mk_temp(R, T)
|| {R,T} <- hipe_sparc_registers:call_clobbered() ++ all_fp_pseudos()].
all_fp_pseudos() -> []. % XXX: for now
tailcall_clobbered_gpr() ->
[hipe_sparc:mk_temp(R, T)
|| {R,T} <- hipe_sparc_registers:tailcall_clobbered() ++ all_fp_pseudos()].
insn_use_gpr(I) ->
case I of
#alu{src1=Src1,src2=Src2} -> addsrc(Src2, [Src1]);
%% #br{src=Src} -> [Src]; % XXX: can br occur this early?
#jmp{src1=Src1,src2=Src2} -> addsrc(Src2, [Src1]);
%% #jmpl{src=Src} -> [Src]; % XXX: can jmpl occur this early?
%% #pseudo_br{src=Src} -> [Src];
#pseudo_call{funv=FunV,sdesc=#sparc_sdesc{arity=Arity}} ->
funv_use(FunV, arity_use_gpr(Arity));
#pseudo_move{src=Src} -> [Src];
#pseudo_ret{} -> [hipe_sparc:mk_rv()];
#pseudo_tailcall{funv=FunV,arity=Arity,stkargs=StkArgs} ->
addsrcs(StkArgs, addtemps(tailcall_clobbered_gpr(), funv_use(FunV, arity_use_gpr(Arity))));
#store{src=Src,base=Base,disp=Disp} ->
addtemp(Src, addsrc(Disp, [Base]));
#pseudo_fload{base=Base} -> [Base];
#pseudo_fstore{base=Base} -> [Base];
_ -> []
end.
arity_use_gpr(Arity) ->
[hipe_sparc:mk_temp(R, 'tagged')
|| R <- hipe_sparc_registers:args(Arity)].
funv_use(FunV, Set) ->
case FunV of
#sparc_temp{} -> addtemp(FunV, Set);
_ -> Set
end.
addsrcs([Arg|Args], Set) ->
addsrcs(Args, addsrc(Arg, Set));
addsrcs([], Set) ->
Set.
addsrc(Src, Set) ->
case Src of
#sparc_temp{} -> addtemp(Src, Set);
_ -> Set
end.
%%%
%%% Defs and uses for floating-point registers only.
%%%
insn_def_fpr(I) ->
case I of
#pseudo_call{} -> call_clobbered_fpr();
#fp_binary{dst=Dst} -> [Dst];
#fp_unary{dst=Dst} -> [Dst];
#pseudo_fload{dst=Dst} -> [Dst];
#pseudo_fmove{dst=Dst} -> [Dst];
_ -> []
end.
insn_defs_all_fpr(I) ->
case I of
#pseudo_call{} -> true;
_ -> false
end.
call_clobbered_fpr() ->
[hipe_sparc:mk_temp(R, 'double') || R <- hipe_sparc_registers:allocatable_fpr()].
insn_use_fpr(I) ->
case I of
#fp_binary{src1=Src1,src2=Src2} -> addtemp(Src1, [Src2]);
#fp_unary{src=Src} -> [Src];
#pseudo_fmove{src=Src} -> [Src];
#pseudo_fstore{src=Src} -> [Src];
_ -> []
end.
%%%
%%% Auxiliary operations on sets of temps
%%% These sets are small. No point using gb_trees, right?
%%%
addtemps([Arg|Args], Set) ->
addtemps(Args, addtemp(Arg, Set));
addtemps([], Set) ->
Set.
addtemp(Temp, Set) ->
case lists:member(Temp, Set) of
false -> [Temp|Set];
_ -> Set
end.
