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%% -*- erlang-indent-level: 2 -*-
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2002-2014. 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%
%%
%%----------------------------------------------------------------------
%% File : hipe_icode_ssa.erl
%% Author :
%% Created :
%% Purpose : Provides interface functions for converting Icode into
%% SSA form and back using the generic SSA converter.
%%----------------------------------------------------------------------
-module(hipe_icode_ssa).
%% The following defines are needed by the included file below
-define(CODE, hipe_icode).
-define(CFG, hipe_icode_cfg).
-define(LIVENESS, hipe_icode_liveness).
-define(LIVENESS_NEEDED, true).
-include("hipe_icode.hrl").
-include("../ssa/hipe_ssa.inc").
%% Declarations for exported functions which are Icode-specific.
-spec ssa_liveness__analyze(#cfg{}) -> gb_trees:tree().
-spec ssa_liveness__livein(_, icode_lbl()) -> [#icode_variable{}].
%% -spec ssa_liveness__livein(_, icode_lbl(), _) -> [#icode_var{}].
%%----------------------------------------------------------------------
%% Auxiliary operations which seriously differ between Icode and RTL.
%%----------------------------------------------------------------------
defs_to_rename(Statement) ->
hipe_icode:defines(Statement).
uses_to_rename(Statement) ->
hipe_icode:uses(Statement).
liveout_no_succ() ->
[].
%%----------------------------------------------------------------------
reset_var_indx() ->
hipe_gensym:set_var(icode, 0).
%%----------------------------------------------------------------------
is_fp_temp(Temp) ->
hipe_icode:is_fvar(Temp).
mk_new_fp_temp() ->
hipe_icode:mk_new_fvar().
%%----------------------------------------------------------------------
%% Procedure : makePhiMove
%% Purpose : Create an ICode-specific version of a move instruction
%% depending on the type of the arguments.
%% Arguments : Dst, Src - the arguments of a Phi instruction that is
%% to be moved up the predecessor block as part
%% of the SSA unconvert phase.
%% Returns : Code
%%----------------------------------------------------------------------
makePhiMove(Dst, Src) ->
case hipe_icode:is_fvar(Dst) of
false ->
case hipe_icode:is_fvar(Src) of
false ->
hipe_icode:mk_move(Dst, Src);
true ->
hipe_icode:mk_primop([Dst], unsafe_tag_float, [Src])
end;
true ->
case hipe_icode:is_fvar(Src) of
true ->
hipe_icode:mk_move(Dst, Src);
false ->
hipe_icode:mk_primop([Dst], conv_to_float, [Src])
end
end.
%%----------------------------------------------------------------------
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