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authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /lib/hipe/arm/hipe_arm_finalise.erl
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The R13B03 release.OTP_R13B03
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+%% -*- erlang-indent-level: 2 -*-
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2005-2009. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights 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).