%%% -*- erlang-indent-level: 2 -*-
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%%% Linear Scan register allocator for PowerPC
-module(hipe_ppc_ra_ls).
-export([ra/3]).
ra(Defun, SpillIndex, Options) ->
NewDefun = Defun, %% hipe_${ARCH}_ra_rename:rename(Defun,Options),
CFG = hipe_ppc_cfg:init(NewDefun),
SpillLimit = hipe_ppc_specific:number_of_temporaries(CFG),
alloc(NewDefun, SpillIndex, SpillLimit, Options).
alloc(Defun, SpillIndex, SpillLimit, Options) ->
CFG = hipe_ppc_cfg:init(Defun),
{Coloring, _NewSpillIndex} =
regalloc(
CFG,
hipe_ppc_registers:allocatable_gpr()--
[hipe_ppc_registers:temp3(),
hipe_ppc_registers:temp2(),
hipe_ppc_registers:temp1()],
[hipe_ppc_cfg:start_label(CFG)],
SpillIndex, SpillLimit, Options,
hipe_ppc_specific),
{NewDefun, _DidSpill} =
hipe_ppc_ra_postconditions:check_and_rewrite(
Defun, Coloring, 'linearscan'),
TempMap = hipe_temp_map:cols2tuple(Coloring, hipe_ppc_specific),
{TempMap2,_NewSpillIndex2} =
hipe_spillmin:stackalloc(CFG, [], SpillIndex, Options,
hipe_ppc_specific, TempMap),
Coloring2 =
hipe_spillmin:mapmerge(hipe_temp_map:to_substlist(TempMap), TempMap2),
{NewDefun, Coloring2}.
regalloc(CFG, PhysRegs, Entrypoints, SpillIndex, DontSpill, Options, Target) ->
hipe_ls_regalloc:regalloc(
CFG, PhysRegs, Entrypoints, SpillIndex, DontSpill, Options, Target).
