%%% -*- erlang-indent-level: 2 -*-
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%%% Copyright Ericsson AB 2006-2016. All Rights Reserved.
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%%% Linear Scan register allocator for ARM
-module(hipe_arm_ra_ls).
-export([ra/4]).
ra(CFG, Liveness, SpillIndex, Options) ->
SpillLimit = hipe_arm_specific:number_of_temporaries(CFG),
alloc(CFG, Liveness, SpillIndex, SpillLimit, Options).
alloc(CFG, Liveness, SpillIndex, SpillLimit, Options) ->
{Coloring, _NewSpillIndex} =
regalloc(
CFG, Liveness,
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),
{NewCFG, _DidSpill} =
hipe_arm_ra_postconditions:check_and_rewrite(
CFG, 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),
{NewCFG, Liveness, Coloring2}.
regalloc(CFG, Liveness, PhysRegs, Entrypoints, SpillIndex, DontSpill, Options,
Target) ->
hipe_ls_regalloc:regalloc(CFG, Liveness, PhysRegs, Entrypoints, SpillIndex,
DontSpill, Options, Target).
