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Diffstat (limited to 'lib/compiler/src/beam_a.erl')
| -rw-r--r-- | lib/compiler/src/beam_a.erl | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/lib/compiler/src/beam_a.erl b/lib/compiler/src/beam_a.erl new file mode 100644 index 0000000000..1c51226314 --- /dev/null +++ b/lib/compiler/src/beam_a.erl @@ -0,0 +1,97 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2012. 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% +%% +%% Purpose: Run directly after code generation to do any normalization +%% or preparation to simplify the optimization passes. +%% (Mandatory.) + +-module(beam_a). + +-export([module/2]). + +module({Mod,Exp,Attr,Fs0,Lc}, _Opt) -> + Fs = [function(F) || F <- Fs0], + {ok,{Mod,Exp,Attr,Fs,Lc}}. + +function({function,Name,Arity,CLabel,Is0}) -> + try + %% Rename certain operations to simplify the optimization passes. + Is1 = rename_instrs(Is0), + + %% Remove unusued labels for cleanliness and to help + %% optimization passes and HiPE. + Is = beam_jump:remove_unused_labels(Is1), + {function,Name,Arity,CLabel,Is} + catch + Class:Error -> + Stack = erlang:get_stacktrace(), + io:fwrite("Function: ~w/~w\n", [Name,Arity]), + erlang:raise(Class, Error, Stack) + end. + +rename_instrs([{apply_last,A,N}|Is]) -> + [{apply,A},{deallocate,N},return|rename_instrs(Is)]; +rename_instrs([{call_last,A,F,N}|Is]) -> + [{call,A,F},{deallocate,N},return|rename_instrs(Is)]; +rename_instrs([{call_ext_last,A,F,N}|Is]) -> + [{call_ext,A,F},{deallocate,N},return|rename_instrs(Is)]; +rename_instrs([{call_only,A,F}|Is]) -> + [{call,A,F},return|rename_instrs(Is)]; +rename_instrs([{call_ext_only,A,F}|Is]) -> + [{call_ext,A,F},return|rename_instrs(Is)]; +rename_instrs([I|Is]) -> + [rename_instr(I)|rename_instrs(Is)]; +rename_instrs([]) -> []. + +rename_instr({bs_put_binary=I,F,Sz,U,Fl,Src}) -> + {bs_put,F,{I,U,Fl},[Sz,Src]}; +rename_instr({bs_put_float=I,F,Sz,U,Fl,Src}) -> + {bs_put,F,{I,U,Fl},[Sz,Src]}; +rename_instr({bs_put_integer=I,F,Sz,U,Fl,Src}) -> + {bs_put,F,{I,U,Fl},[Sz,Src]}; +rename_instr({bs_put_utf8=I,F,Fl,Src}) -> + {bs_put,F,{I,Fl},[Src]}; +rename_instr({bs_put_utf16=I,F,Fl,Src}) -> + {bs_put,F,{I,Fl},[Src]}; +rename_instr({bs_put_utf32=I,F,Fl,Src}) -> + {bs_put,F,{I,Fl},[Src]}; +%% rename_instr({bs_put_string,_,_}=I) -> +%% {bs_put,{f,0},I,[]}; +rename_instr({bs_add=I,F,[Src1,Src2,U],Dst}) when is_integer(U) -> + {bif,I,F,[Src1,Src2,{integer,U}],Dst}; +rename_instr({bs_utf8_size=I,F,Src,Dst}) -> + {bif,I,F,[Src],Dst}; +rename_instr({bs_utf16_size=I,F,Src,Dst}) -> + {bif,I,F,[Src],Dst}; +rename_instr({bs_init2=I,F,Sz,Extra,Live,Flags,Dst}) -> + {bs_init,F,{I,Extra,Flags},Live,[Sz],Dst}; +rename_instr({bs_init_bits=I,F,Sz,Extra,Live,Flags,Dst}) -> + {bs_init,F,{I,Extra,Flags},Live,[Sz],Dst}; +rename_instr({bs_append=I,F,Sz,Extra,Live,U,Src,Flags,Dst}) -> + {bs_init,F,{I,Extra,U,Flags},Live,[Sz,Src],Dst}; +rename_instr({bs_private_append=I,F,Sz,U,Src,Flags,Dst}) -> + {bs_init,F,{I,U,Flags},none,[Sz,Src],Dst}; +rename_instr(bs_init_writable=I) -> + {bs_init,{f,0},I,1,[{x,0}],{x,0}}; +rename_instr({select_val=I,Reg,Fail,{list,List}}) -> + {select,I,Reg,Fail,List}; +rename_instr({select_tuple_arity=I,Reg,Fail,{list,List}}) -> + {select,I,Reg,Fail,List}; +rename_instr(send) -> + {call_ext,2,send}; +rename_instr(I) -> I. |