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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_ra_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_ra_finalise).
+-export([finalise/3]).
+-include("hipe_arm.hrl").
+
+finalise(Defun, TempMap, _FPMap0=[]) ->
+ Code = hipe_arm:defun_code(Defun),
+ {_, SpillLimit} = hipe_arm:defun_var_range(Defun),
+ Map = mk_ra_map(TempMap, SpillLimit),
+ NewCode = ra_code(Code, Map, []),
+ Defun#defun{code=NewCode}.
+
+ra_code([I|Insns], Map, Accum) ->
+ ra_code(Insns, Map, [ra_insn(I, Map) | Accum]);
+ra_code([], _Map, Accum) ->
+ lists:reverse(Accum).
+
+ra_insn(I, Map) ->
+ case I of
+ #alu{} -> ra_alu(I, Map);
+ #cmp{} -> ra_cmp(I, Map);
+ #load{} -> ra_load(I, Map);
+ #ldrsb{} -> ra_ldrsb(I, Map);
+ #move{} -> ra_move(I, Map);
+ #pseudo_call{} -> ra_pseudo_call(I, Map);
+ #pseudo_li{} -> ra_pseudo_li(I, Map);
+ #pseudo_move{} -> ra_pseudo_move(I, Map);
+ #pseudo_switch{} -> ra_pseudo_switch(I, Map);
+ #pseudo_tailcall{} -> ra_pseudo_tailcall(I, Map);
+ #smull{} -> ra_smull(I, Map);
+ #store{} -> ra_store(I, Map);
+ _ -> I
+ end.
+
+ra_alu(I=#alu{dst=Dst,src=Src,am1=Am1}, Map) ->
+ NewDst = ra_temp(Dst, Map),
+ NewSrc = ra_temp(Src, Map),
+ NewAm1 = ra_am1(Am1, Map),
+ I#alu{dst=NewDst,src=NewSrc,am1=NewAm1}.
+
+ra_cmp(I=#cmp{src=Src,am1=Am1}, Map) ->
+ NewSrc = ra_temp(Src, Map),
+ NewAm1 = ra_am1(Am1, Map),
+ I#cmp{src=NewSrc,am1=NewAm1}.
+
+ra_load(I=#load{dst=Dst,am2=Am2}, Map) ->
+ NewDst = ra_temp(Dst, Map),
+ NewAm2 = ra_am2(Am2, Map),
+ I#load{dst=NewDst,am2=NewAm2}.
+
+ra_ldrsb(I=#ldrsb{dst=Dst,am3=Am3}, Map) ->
+ NewDst = ra_temp(Dst, Map),
+ NewAm3 = ra_am3(Am3, Map),
+ I#ldrsb{dst=NewDst,am3=NewAm3}.
+
+ra_move(I=#move{dst=Dst,am1=Am1}, Map) ->
+ NewDst = ra_temp(Dst, Map),
+ NewAm1 = ra_am1(Am1, Map),
+ I#move{dst=NewDst,am1=NewAm1}.
+
+ra_pseudo_call(I=#pseudo_call{funv=FunV}, Map) ->
+ NewFunV = ra_funv(FunV, Map),
+ I#pseudo_call{funv=NewFunV}.
+
+ra_pseudo_li(I=#pseudo_li{dst=Dst}, Map) ->
+ NewDst = ra_temp(Dst, Map),
+ I#pseudo_li{dst=NewDst}.
+
+ra_pseudo_move(I=#pseudo_move{dst=Dst,src=Src}, Map) ->
+ NewDst = ra_temp(Dst, Map),
+ NewSrc = ra_temp(Src, Map),
+ I#pseudo_move{dst=NewDst,src=NewSrc}.
+
+ra_pseudo_switch(I=#pseudo_switch{jtab=JTab,index=Index}, Map) ->
+ NewJTab = ra_temp(JTab, Map),
+ NewIndex = ra_temp(Index, Map),
+ I#pseudo_switch{jtab=NewJTab,index=NewIndex}.
+
+ra_pseudo_tailcall(I=#pseudo_tailcall{funv=FunV,stkargs=StkArgs}, Map) ->
+ NewFunV = ra_funv(FunV, Map),
+ NewStkArgs = ra_args(StkArgs, Map),
+ I#pseudo_tailcall{funv=NewFunV,stkargs=NewStkArgs}.
+
+ra_smull(I=#smull{dstlo=DstLo,dsthi=DstHi,src1=Src1,src2=Src2}, Map) ->
+ NewDstLo = ra_temp(DstLo, Map),
+ NewDstHi = ra_temp(DstHi, Map),
+ NewSrc1 = ra_temp(Src1, Map),
+ NewSrc2 = ra_temp(Src2, Map),
+ I#smull{dstlo=NewDstLo,dsthi=NewDstHi,src1=NewSrc1,src2=NewSrc2}.
+
+ra_store(I=#store{src=Src,am2=Am2}, Map) ->
+ NewSrc = ra_temp(Src, Map),
+ NewAm2 = ra_am2(Am2, Map),
+ I#store{src=NewSrc,am2=NewAm2}.
+
+%%% Tailcall stack arguments.
+
+ra_args([Arg|Args], Map) ->
+ [ra_temp_or_imm(Arg, Map) | ra_args(Args, Map)];
+ra_args([], _) ->
+ [].
+
+ra_temp_or_imm(Arg, Map) ->
+ case hipe_arm:is_temp(Arg) of
+ true ->
+ ra_temp(Arg, Map);
+ false ->
+ Arg
+ end.
+
+%%% FunV, Am, and Temp operands.
+
+ra_funv(FunV, Map) ->
+ case FunV of
+ #arm_temp{} -> ra_temp(FunV, Map);
+ _ -> FunV
+ end.
+
+ra_am1(Am1, Map) ->
+ case Am1 of
+ #arm_temp{} ->
+ ra_temp(Am1, Map);
+ {Src2,rrx} ->
+ NewSrc2 = ra_temp(Src2, Map),
+ {NewSrc2,rrx};
+ {Src2,ShiftOp,ShiftArg} ->
+ NewSrc2 = ra_temp(Src2, Map),
+ NewArg =
+ case ShiftArg of
+ #arm_temp{} -> ra_temp(ShiftArg, Map);
+ _ -> ShiftArg
+ end,
+ {NewSrc2,ShiftOp,NewArg};
+ _ ->
+ Am1
+ end.
+
+ra_am2(Am2=#am2{src=Src2,offset=Offset}, Map) ->
+ NewSrc2 = ra_temp(Src2, Map),
+ NewOffset = ra_am2offset(Offset, Map),
+ Am2#am2{src=NewSrc2,offset=NewOffset}.
+
+ra_am2offset(Offset, Map) ->
+ case Offset of
+ #arm_temp{} ->
+ ra_temp(Offset, Map);
+ {Src3,rrx} ->
+ NewSrc3 = ra_temp(Src3, Map),
+ {NewSrc3,rrx};
+ {Src3,ShiftOp,Imm5} ->
+ NewSrc3 = ra_temp(Src3, Map),
+ {NewSrc3,ShiftOp,Imm5};
+ _ ->
+ Offset
+ end.
+
+ra_am3(Am3=#am3{src=Src2,offset=Offset}, Map) ->
+ NewSrc2 = ra_temp(Src2, Map),
+ NewOffset = ra_am3offset(Offset, Map),
+ Am3#am3{src=NewSrc2,offset=NewOffset}.
+
+ra_am3offset(Offset, Map) ->
+ case Offset of
+ #arm_temp{} -> ra_temp(Offset, Map);
+ _ -> Offset
+ end.
+
+-ifdef(notdef). % for FP regalloc
+ra_temp_fp(Temp, FPMap) ->
+ Reg = hipe_arm:temp_reg(Temp),
+ case hipe_arm:temp_type(Temp) of
+ 'double' ->
+ case hipe_arm_registers:is_precoloured_fpr(Reg) of
+ true -> Temp;
+ _ -> ra_temp_common(Reg, Temp, FPMap)
+ end
+ end.
+-endif.
+
+ra_temp(Temp, Map) ->
+ Reg = hipe_arm:temp_reg(Temp),
+ case hipe_arm:temp_type(Temp) of
+ 'double' ->
+ exit({?MODULE,ra_temp,Temp});
+ _ ->
+ case hipe_arm_registers:is_precoloured_gpr(Reg) of
+ true -> Temp;
+ _ -> ra_temp_common(Reg, Temp, Map)
+ end
+ end.
+
+ra_temp_common(Reg, Temp, Map) ->
+ case gb_trees:lookup(Reg, Map) of
+ {value,NewReg} -> Temp#arm_temp{reg=NewReg};
+ _ -> Temp
+ end.
+
+mk_ra_map(TempMap, SpillLimit) ->
+ %% Build a partial map from pseudo to reg or spill.
+ %% Spills are represented as pseudos with indices above SpillLimit.
+ %% (I'd prefer to use negative indices, but that breaks
+ %% hipe_arm_registers:is_precoloured/1.)
+ %% The frame mapping proper is unchanged, since spills look just like
+ %% ordinary (un-allocated) pseudos.
+ lists:foldl(fun(MapLet, Map) ->
+ {Key,Val} = conv_ra_maplet(MapLet, SpillLimit, is_precoloured_gpr),
+ gb_trees:insert(Key, Val, Map)
+ end,
+ gb_trees:empty(),
+ TempMap).
+
+conv_ra_maplet(MapLet = {From,To}, SpillLimit, IsPrecoloured) ->
+ %% From should be a pseudo, or a hard reg mapped to itself.
+ if is_integer(From), From =< SpillLimit ->
+ case hipe_arm_registers:IsPrecoloured(From) of
+ false -> [];
+ _ ->
+ case To of
+ {reg, From} -> [];
+ _ -> exit({?MODULE,conv_ra_maplet,MapLet})
+ end
+ end;
+ true -> exit({?MODULE,conv_ra_maplet,MapLet})
+ end,
+ %% end of From check
+ case To of
+ {reg, NewReg} ->
+ %% NewReg should be a hard reg, or a pseudo mapped
+ %% to itself (formals are handled this way).
+ if is_integer(NewReg) ->
+ case hipe_arm_registers:IsPrecoloured(NewReg) of
+ true -> [];
+ _ -> if From =:= NewReg -> [];
+ true ->
+ exit({?MODULE,conv_ra_maplet,MapLet})
+ end
+ end;
+ true -> exit({?MODULE,conv_ra_maplet,MapLet})
+ end,
+ %% end of NewReg check
+ {From, NewReg};
+ {spill, SpillIndex} ->
+ %% SpillIndex should be >= 0.
+ if is_integer(SpillIndex), SpillIndex >= 0 -> [];
+ true -> exit({?MODULE,conv_ra_maplet,MapLet})
+ end,
+ %% end of SpillIndex check
+ ToTempNum = SpillLimit+SpillIndex+1,
+ MaxTempNum = hipe_gensym:get_var(arm),
+ if MaxTempNum >= ToTempNum -> ok;
+ true -> hipe_gensym:set_var(arm, ToTempNum)
+ end,
+ {From, ToTempNum};
+ _ -> exit({?MODULE,conv_ra_maplet,MapLet})
+ end.
+
+-ifdef(notdef). % for FP regalloc
+mk_ra_map_fp(FPMap, SpillLimit) ->
+ lists:foldl(fun(MapLet, Map) ->
+ {Key,Val} = conv_ra_maplet(MapLet, SpillLimit,
+ is_precoloured_fpr),
+ gb_trees:insert(Key, Val, Map)
+ end,
+ gb_trees:empty(),
+ FPMap).
+-endif.