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%%% -*- erlang-indent-level: 2 -*-
%%%
%%% %CopyrightBegin%
%%%
%%% Copyright Ericsson AB 2006-2016. 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%
%%%
%%% Linear Scan register allocator for ARM
-module(hipe_arm_ra_ls).
-export([ra/3]).
ra(Defun, SpillIndex, Options) ->
NewDefun = Defun, %% hipe_${ARCH}_ra_rename:rename(Defun,Options),
CFG = hipe_arm_cfg:init(NewDefun),
SpillLimit = hipe_arm_specific:number_of_temporaries(CFG),
alloc(NewDefun, SpillIndex, SpillLimit, Options).
alloc(Defun, SpillIndex, SpillLimit, Options) ->
CFG = hipe_arm_cfg:init(Defun),
{Coloring, _NewSpillIndex, Liveness} =
regalloc(
CFG,
hipe_arm_registers:allocatable_gpr()--
[hipe_arm_registers:temp3(),
hipe_arm_registers:temp2(),
hipe_arm_registers:temp1()],
[hipe_arm_cfg:start_label(CFG)],
SpillIndex, SpillLimit, Options,
hipe_arm_specific),
{NewDefun, _DidSpill} =
hipe_arm_ra_postconditions:check_and_rewrite(
Defun, Coloring, 'linearscan'),
TempMap = hipe_temp_map:cols2tuple(Coloring, hipe_arm_specific),
{SpillMap, _NewSpillIndex2} =
hipe_spillmin:stackalloc(CFG, Liveness, [], SpillIndex, Options,
hipe_arm_specific, TempMap),
Coloring2 =
hipe_spillmin:mapmerge(hipe_temp_map:to_substlist(TempMap), SpillMap),
{NewDefun, Coloring2}.
regalloc(CFG, PhysRegs, Entrypoints, SpillIndex, DontSpill, Options, Target) ->
hipe_ls_regalloc:regalloc(
CFG, PhysRegs, Entrypoints, SpillIndex, DontSpill, Options, Target).
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