diff options
Diffstat (limited to 'lib/hipe/rtl/hipe_rtl_ssapre.erl')
| -rw-r--r-- | lib/hipe/rtl/hipe_rtl_ssapre.erl | 474 |
1 files changed, 233 insertions, 241 deletions
diff --git a/lib/hipe/rtl/hipe_rtl_ssapre.erl b/lib/hipe/rtl/hipe_rtl_ssapre.erl index e248457806..df1a4b9376 100644 --- a/lib/hipe/rtl/hipe_rtl_ssapre.erl +++ b/lib/hipe/rtl/hipe_rtl_ssapre.erl @@ -107,7 +107,7 @@ rtl_ssapre(RtlSSACfg, Options) -> case XsiList of [] -> %% No Xsi - ?option_time(?pp_debug("~n~n################ No Xsi Inserted ################~n",[]),"RTL A-SSAPRE No Xsi inserted (skip Downsafety and Will Be Available)",Options), + ?pp_debug("~n~n################ No Xsi Inserted ################~n",[]), ok; _ -> ?pp_debug("~n############ Downsafety ##########~n",[]), @@ -126,7 +126,7 @@ rtl_ssapre(RtlSSACfg, Options) -> ?pp_debug("~n~n################ Xsi CFG ################~n",[]),pp_cfg(CFG2,XsiGraph), init_redundancy_count(), - ?option_time(FinalCFG=perform_code_motion(Labels,CFG2,XsiGraph),"RTL A-SSAPRE Code Motion",Options), + FinalCFG = ?option_time(perform_code_motion(Labels,CFG2,XsiGraph),"RTL A-SSAPRE Code Motion",Options), ?pp_debug("\n############ No more need for the Xsi Graph....Deleting...",[]),?GRAPH:delete(XsiGraph), @@ -146,7 +146,7 @@ perform_Xsi_insertion(Cfg, Options) -> init_counters(), %% Init counters for Bottoms and Temps DigraphOpts = [cyclic, private], XsiGraph = digraph:new(DigraphOpts), - %% Be carefull, the digraph component is NOT garbage collected, + %% Be careful, the digraph component is NOT garbage collected, %% so don't create 20 millions of instances! %% finds the longest depth %% Depth-first, preorder traversal over Basic Blocks. @@ -154,13 +154,13 @@ perform_Xsi_insertion(Cfg, Options) -> Labels = ?CFG:preorder(Cfg), ?pp_debug("~n~n############# Finding definitions for computation~n~n",[]), - ?option_time({Cfg2,XsiGraph} = find_definition_for_computations(Labels,Cfg,XsiGraph),"RTL A-SSAPRE Xsi Insertion, searching from instructions",Options), + {Cfg2,XsiGraph} = ?option_time(find_definition_for_computations(Labels,Cfg,XsiGraph),"RTL A-SSAPRE Xsi Insertion, searching from instructions",Options), %% Active List creation GeneratorXsiList = lists:sort(?GRAPH:vertices(XsiGraph)), ?pp_debug("~n~n############# Inserted Xsis ~w",[GeneratorXsiList]), ?pp_debug("~n~n############# Finding operands~n",[]), - ?option_time({Cfg3,XsiGraph} = find_operands(Cfg2,XsiGraph,GeneratorXsiList,0),"RTL A-SSAPRE Xsi Insertion, finding operands",Options), + {Cfg3,XsiGraph} = ?option_time(find_operands(Cfg2,XsiGraph,GeneratorXsiList,0),"RTL A-SSAPRE Xsi Insertion, finding operands",Options), %% Creating the CFGGraph ?pp_debug("~n~n############# Creating CFG Graph",[]), @@ -170,9 +170,9 @@ perform_Xsi_insertion(Cfg, Options) -> ?pp_debug("~nAdding a vertex for the start label: ~w",[StartLabel]), ?GRAPH:add_vertex(CFGGraph, StartLabel, #block{type = top}), % Doing the others - ?option_time(MPs=create_cfggraph(Others,Cfg3,CFGGraph,[],[],[],XsiGraph),"RTL A-SSAPRE Xsi Insertion, creating intermediate 'SSAPRE Graph'",Options), + MPs = ?option_time(create_cfggraph(Others,Cfg3,CFGGraph,[],[],[],XsiGraph),"RTL A-SSAPRE Xsi Insertion, creating intermediate 'SSAPRE Graph'",Options), - %% Return the bloody collected information + %% Return the collected information {Cfg3,XsiGraph,CFGGraph,MPs}. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @@ -221,22 +221,21 @@ find_definition_for_computations_in_block(BlockLabel,[Inst|Rest],Cfg, ?pp_debug(" Inserting Xsi: ",[]),pp_xsi(Xsi), Label = Xsi#xsi.label, - case BlockLabel =:= Label of - false -> - %% Insert the Xsi in the appropriate block - Code = hipe_bb:code(?CFG:bb(Cfg,Label)), - {BeforeCode,AfterCode} = split_for_xsi(lists:reverse(Code),[]), - NewCode = BeforeCode++[XsiLink|AfterCode], - NewBB = hipe_bb:mk_bb(NewCode), - NewCfg = ?CFG:bb_add(Cfg,Label,NewBB), - NewVisited = [NewInst|VisitedInstructions]; - _-> - {BeforeCode,AfterCode} = split_for_xsi(VisitedInstructions,[]), - TempVisited = BeforeCode++[XsiLink|AfterCode], - TempVisited2 = lists:reverse(TempVisited), - NewVisited = [NewInst|TempVisited2], - NewCfg = Cfg - end, + {NewCfg, NewVisited} = + case BlockLabel =:= Label of + false -> + %% Insert the Xsi in the appropriate block + Code = hipe_bb:code(?CFG:bb(Cfg,Label)), + {BeforeCode,AfterCode} = split_for_xsi(lists:reverse(Code),[]), + NewCode = BeforeCode++[XsiLink|AfterCode], + NewBB = hipe_bb:mk_bb(NewCode), + {?CFG:bb_add(Cfg,Label,NewBB), [NewInst|VisitedInstructions]}; + _-> + {BeforeCode,AfterCode} = split_for_xsi(VisitedInstructions,[]), + TempVisited = BeforeCode++[XsiLink|AfterCode], + TempVisited2 = lists:reverse(TempVisited), + {Cfg, [NewInst|TempVisited2]} + end, find_definition_for_computations_in_block(BlockLabel, Rest, NewCfg, NewVisited, XsiGraph) end; @@ -787,14 +786,15 @@ create_cfggraph([Label|Ls],Cfg,CFGGraph,ToBeFactorizedAcc,MPAcc,LateEdges,XsiGra Defs = get_defs_in_non_merge_block(Code, []), ?pp_debug("~nAdding a vertex for ~w", [Label]), Succs = ?CFG:succ(Cfg, Label), - case Succs of - [] -> %% Exit point - ?GRAPH:add_vertex(CFGGraph, Label, #block{type = exit}), - NewToBeFactorizedAcc = ToBeFactorizedAcc; - _ -> %% Split point - ?GRAPH:add_vertex(CFGGraph,Label,#block{type=not_mp,attributes={P,Succs}}), - NewToBeFactorizedAcc = [Label|ToBeFactorizedAcc] - end, + NewToBeFactorizedAcc = + case Succs of + [] -> %% Exit point + ?GRAPH:add_vertex(CFGGraph, Label, #block{type = exit}), + ToBeFactorizedAcc; + _ -> %% Split point + ?GRAPH:add_vertex(CFGGraph,Label,#block{type=not_mp,attributes={P,Succs}}), + [Label|ToBeFactorizedAcc] + end, ?pp_debug("~nAdding an edge ~w -> ~w (~w)",[P,Label,Defs]), case ?GRAPH:add_edge(CFGGraph,P,Label,Defs) of {error,Reason} -> @@ -862,56 +862,53 @@ add_edges_for_mp([P|Ps], Label, LateEdges) -> %% Doesn't do anything so far add_map_and_uses([], _Key, Maps, Uses) -> - {Maps,Uses}; + {Maps, Uses}; add_map_and_uses([XsiOp|Ops], Key, Maps, Uses) -> - case XsiOp#xsi_op.op of - #bottom{} -> - Set = case gb_trees:lookup(XsiOp,Maps) of - {value, V} -> - ?SETS:add_element(Key,V); - none -> - ?SETS:from_list([Key]) - end, - NewMaps = gb_trees:enter(XsiOp,Set,Maps), - NewUses = Uses; - #temp{} -> - Set = case gb_trees:lookup(XsiOp,Maps) of - {value, V} -> - ?SETS:add_element(Key,V); - none -> - ?SETS:from_list([Key]) - end, - NewMaps = gb_trees:enter(XsiOp,Set,Maps), - Pred = XsiOp#xsi_op.pred, - OOP = XsiOp#xsi_op.op, - SSet = case gb_trees:lookup(Pred,Uses) of - {value, VV} -> - ?SETS:add_element(OOP#temp.key,VV); - none -> - ?SETS:from_list([OOP#temp.key]) - end, - NewUses = gb_trees:enter(Pred,SSet,Uses); - #eop{} -> - Set = case gb_trees:lookup(XsiOp,Maps) of - {value, V} -> - ?SETS:add_element(Key,V); - none -> - ?SETS:from_list([Key]) - end, - NewMaps = gb_trees:enter(XsiOp,Set,Maps), - Pred = XsiOp#xsi_op.pred, - Op = XsiOp#xsi_op.op, - SSet = case gb_trees:lookup(Pred,Uses) of - {value, VV} -> - ?SETS:add_element(Op#eop.stopped_by,VV); - none -> - ?SETS:from_list([Op#eop.stopped_by]) - end, - NewUses = gb_trees:enter(Pred,SSet,Uses); - _-> - NewMaps = Maps, - NewUses = Uses - end, + {NewMaps, NewUses} = + case XsiOp#xsi_op.op of + #bottom{} -> + Set = case gb_trees:lookup(XsiOp, Maps) of + {value, V} -> + ?SETS:add_element(Key, V); + none -> + ?SETS:from_list([Key]) + end, + {gb_trees:enter(XsiOp, Set, Maps), Uses}; + #temp{} -> + Set = case gb_trees:lookup(XsiOp, Maps) of + {value, V} -> + ?SETS:add_element(Key, V); + none -> + ?SETS:from_list([Key]) + end, + Pred = XsiOp#xsi_op.pred, + OOP = XsiOp#xsi_op.op, + SSet = case gb_trees:lookup(Pred, Uses) of + {value, VV} -> + ?SETS:add_element(OOP#temp.key, VV); + none -> + ?SETS:from_list([OOP#temp.key]) + end, + {gb_trees:enter(XsiOp, Set, Maps), gb_trees:enter(Pred, SSet, Uses)}; + #eop{} -> + Set = case gb_trees:lookup(XsiOp, Maps) of + {value, V} -> + ?SETS:add_element(Key, V); + none -> + ?SETS:from_list([Key]) + end, + Pred = XsiOp#xsi_op.pred, + Op = XsiOp#xsi_op.op, + SSet = case gb_trees:lookup(Pred, Uses) of + {value, VV} -> + ?SETS:add_element(Op#eop.stopped_by, VV); + none -> + ?SETS:from_list([Op#eop.stopped_by]) + end, + {gb_trees:enter(XsiOp, Set, Maps), gb_trees:enter(Pred, SSet, Uses)}; + _-> + {Maps, Uses} + end, add_map_and_uses(Ops, Key, NewMaps, NewUses). post_process([], _CFGGraph) -> ok; @@ -1162,37 +1159,38 @@ code_motion_in_block(L,[Inst|Insts],Cfg,XsiG,Visited,InsertionsAcc) -> #pre_candidate{} -> Def = Inst#pre_candidate.def, Alu = Inst#pre_candidate.alu, - case Def of - bottom -> - InstToAdd = Alu; - #temp{} -> - Key = Def#temp.key, - {_V,Xsi} = ?GRAPH:vertex(XsiG,Key), - case Xsi#xsi.wba of - true -> - %% Turn into a move - Dst = ?RTL:alu_dst(Alu), - Move = ?RTL:mk_move(Dst,Def#temp.var), - pp_instr(Inst#pre_candidate.alu,nil), ?pp_debug(" ==> ",[]), pp_instr(Move,nil), - %% Counting redundancies - redundancy_add(), - InstToAdd = Move; - _ -> - InstToAdd = Alu - end; - _ -> %% Def is a real variable - %% Turn into a move - Dst = ?RTL:alu_dst(Alu), - Move = ?RTL:mk_move(Dst,Def), - pp_instr(Alu,nil), ?pp_debug(" ==> ",[]), pp_instr(Move,nil), - %% Counting redundancies - redundancy_add(), - InstToAdd = Move - end, + InstToAdd = + case Def of + bottom -> + Alu; + #temp{} -> + Key = Def#temp.key, + {_V,Xsi} = ?GRAPH:vertex(XsiG,Key), + case Xsi#xsi.wba of + true -> + %% Turn into a move + Dst = ?RTL:alu_dst(Alu), + Move = ?RTL:mk_move(Dst,Def#temp.var), + pp_instr(Inst#pre_candidate.alu,nil), ?pp_debug(" ==> ",[]), pp_instr(Move,nil), + %% Counting redundancies + redundancy_add(), + Move; + _ -> + Alu + end; + _ -> %% Def is a real variable + %% Turn into a move + Dst = ?RTL:alu_dst(Alu), + Move = ?RTL:mk_move(Dst,Def), + pp_instr(Alu,nil), ?pp_debug(" ==> ",[]), pp_instr(Move,nil), + %% Counting redundancies + redundancy_add(), + Move + end, code_motion_in_block(L,Insts,Cfg,XsiG,[InstToAdd|Visited],InsertionsAcc); #xsi_link{} -> Key = Inst#xsi_link.num, - {_V,Xsi} = ?GRAPH:vertex(XsiG,Key), + {_V,Xsi} = ?GRAPH:vertex(XsiG,Key), case Xsi#xsi.wba of true -> %% Xsi is a WBA, it might trigger insertions @@ -1235,139 +1233,133 @@ get_insertions([],OpAcc,InsertionsAcc,_Visited,_Expr,_XsiG) -> get_insertions([XsiOp|Ops],OpAcc,InsertionsAcc,Visited,Expr,XsiG) -> Pred = XsiOp#xsi_op.pred, Op = XsiOp#xsi_op.op, - case Op of - #bottom{} -> - case gb_trees:lookup(Pred,InsertionsAcc) of - {value,Insertion} -> - From = Insertion#insertion.from, - case lists:keyfind(Op, 1, From) of - false -> - ?pp_debug("~nThere has been insertions along the edge L~w already, but not for that operand | Op=",[Pred]),pp_arg(Op), - Dst = Op#bottom.var, - Expr2 = ?RTL:alu_dst_update(Expr,Dst), - Inst = manufacture_computation(Pred,Expr2,Visited), - Code = Insertion#insertion.code, - NewInsertion = Insertion#insertion{from=[{Op,Dst}|From],code=[Inst|Code]}, - NewInsertionsAcc = gb_trees:update(Pred,NewInsertion,InsertionsAcc); - {_, Val} -> - ?pp_debug("~nThere has been insertions along the edge L~w already, and for that operand too | Op=",[Pred]),pp_arg(Op), - Dst = Val, - NewInsertionsAcc = InsertionsAcc - end; - none -> - ?pp_debug("~nThere has been no insertion along the edge L~w, (and not for that operand, of course)| Op=",[Pred]),pp_arg(Op), - Dst = Op#bottom.var, - Expr2 = ?RTL:alu_dst_update(Expr,Dst), - Inst = manufacture_computation(Pred,Expr2,Visited), - NewInsertion = #insertion{from=[{Op,Dst}],code=[Inst]}, - NewInsertionsAcc = gb_trees:insert(Pred,NewInsertion,InsertionsAcc) - end; - #const_expr{} -> - case gb_trees:lookup(Pred,InsertionsAcc) of - {value,Insertion} -> - From = Insertion#insertion.from, - case lists:keyfind(Op, 1, From) of - false -> - ?pp_debug("~nThere have been insertions along the edge L~w already, but not for that operand | Op=",[Pred]),pp_arg(Op), - Dst = Op#const_expr.var, - Val = Op#const_expr.value, - Inst = ?RTL:mk_move(Dst,Val), - Code = Insertion#insertion.code, - NewInsertion = Insertion#insertion{from=[{Op,Dst}|From],code=[Inst|Code]}, - NewInsertionsAcc = gb_trees:update(Pred,NewInsertion,InsertionsAcc); - {_, Val} -> - ?pp_debug("~nThere have been insertions along the edge L~w already, and for that operand too | Op=",[Pred]),pp_arg(Op), - Dst = Val, - NewInsertionsAcc = InsertionsAcc - end; - none -> - ?pp_debug("~nThere has been no insertion along the edge L~w, (and not for that operand, of course)| Op=",[Pred]),pp_arg(Op), - Dst = Op#const_expr.var, - Val = Op#const_expr.value, - Inst = ?RTL:mk_move(Dst,Val), - NewInsertion = #insertion{from=[{Op,Dst}],code=[Inst]}, - NewInsertionsAcc = gb_trees:insert(Pred,NewInsertion,InsertionsAcc) - end; - #eop{} -> - %% We treat expressions like bottoms - %% The value must be recomputed, and therefore not available... - case gb_trees:lookup(Pred,InsertionsAcc) of - {value,Insertion} -> - From = Insertion#insertion.from, - case lists:keyfind(Op, 1, From) of - false -> - ?pp_debug("~nThere has been insertions along the edge L~w already, but not for that operand | Op=",[Pred]),pp_arg(Op), - Dst = Op#eop.var, - Expr2 = ?RTL:alu_dst_update(Expr,Dst), - Inst = manufacture_computation(Pred,Expr2,Visited), - Code = Insertion#insertion.code, - NewInsertion = Insertion#insertion{from=[{Op,Dst}|From],code=[Inst|Code]}, - NewInsertionsAcc = gb_trees:update(Pred,NewInsertion,InsertionsAcc); - {_, Val} -> - ?pp_debug("~nThere has been insertions along the edge L~w already, and for that operand too | Op=",[Pred]),pp_arg(Op), - Dst = Val, - NewInsertionsAcc = InsertionsAcc - end; - none -> - ?pp_debug("~nThere has been no insertion along the edge L~w, (and not for that operand, of course)| Op=",[Pred]),pp_arg(Op), - Dst = Op#eop.var, - Expr2 = ?RTL:alu_dst_update(Expr,Dst), - Inst = manufacture_computation(Pred,Expr2,Visited), - NewInsertion = #insertion{from=[{Op,Dst}],code=[Inst]}, - NewInsertionsAcc = gb_trees:insert(Pred,NewInsertion,InsertionsAcc) - end; - #temp{} -> - case gb_trees:lookup(Pred,InsertionsAcc) of - {value,Insertion} -> - From = Insertion#insertion.from, - case lists:keyfind(Op, 1, From) of - false -> - ?pp_debug("~nThere has been insertions along the edge L~w already, but not for that operand | Op=",[Pred]),pp_arg(Op), - Key = Op#temp.key, - {_V,Xsi} = ?GRAPH:vertex(XsiG,Key), - case Xsi#xsi.wba of - true -> - ?pp_debug("~nBut the operand is a WBA Xsi: no need for insertion",[]), - Dst = Op#temp.var, - NewInsertionsAcc = InsertionsAcc; - _ -> - ?pp_debug("~nBut the operand is a NOT WBA Xsi: we must make an insertion",[]), - Dst = ?RTL:mk_new_var(), - Expr2 = ?RTL:alu_dst_update(Expr,Dst), - Inst = manufacture_computation(Pred,Expr2,Visited), - Code = Insertion#insertion.code, - NewInsertion = Insertion#insertion{from=[{Op,Dst}|From],code=[Inst|Code]}, - NewInsertionsAcc = gb_trees:update(Pred,NewInsertion,InsertionsAcc) - end; - {_, Val} -> - ?pp_debug("~nThere has been insertions along the edge L~w already, and for that operand too (Op=~w)",[Pred,Op]), - ?pp_debug("~nThis means, this temp is a WBA Xsi's definition",[]), - Dst = Val, - NewInsertionsAcc = InsertionsAcc - end; - none -> - ?pp_debug("~nThere has been no insertion along the edge L~w, (and not for that operand, of course | Op=",[Pred]),pp_arg(Op), - Key = Op#temp.key, - {_V,Xsi} = ?GRAPH:vertex(XsiG,Key), - case Xsi#xsi.wba of - true -> - ?pp_debug("~nBut the operand is a WBA Xsi: no need for insertion",[]), - Dst = Op#temp.var, - NewInsertionsAcc = InsertionsAcc; - _ -> - ?pp_debug("~nBut the operand is a NOT WBA Xsi: we must make an insertion",[]), - Dst = ?RTL:mk_new_var(), - Expr2 = ?RTL:alu_dst_update(Expr,Dst), - Inst = manufacture_computation(Pred,Expr2,Visited), - NewInsertion = #insertion{from=[{Op,Dst}],code=[Inst]}, - NewInsertionsAcc = gb_trees:insert(Pred,NewInsertion,InsertionsAcc) - end - end; - _ -> - ?pp_debug("~nThe operand (Op=",[]),pp_arg(Op),?pp_debug(") is a real variable, no need for insertion along L~w",[Pred]), - Dst = Op, - NewInsertionsAcc = InsertionsAcc - end, + {Dst, NewInsertionsAcc} = + case Op of + #bottom{} -> + case gb_trees:lookup(Pred,InsertionsAcc) of + {value,Insertion} -> + From = Insertion#insertion.from, + case lists:keyfind(Op, 1, From) of + false -> + ?pp_debug("~nThere has been insertions along the edge L~w already, but not for that operand | Op=",[Pred]),pp_arg(Op), + D = Op#bottom.var, + Expr2 = ?RTL:alu_dst_update(Expr,D), + Inst = manufacture_computation(Pred,Expr2,Visited), + Code = Insertion#insertion.code, + NewInsertion = Insertion#insertion{from=[{Op,D}|From],code=[Inst|Code]}, + {D, gb_trees:update(Pred, NewInsertion, InsertionsAcc)}; + {_, Val} -> + ?pp_debug("~nThere has been insertions along the edge L~w already, and for that operand too | Op=",[Pred]),pp_arg(Op), + {Val, InsertionsAcc} + end; + none -> + ?pp_debug("~nThere has been no insertion along the edge L~w, (and not for that operand, of course)| Op=",[Pred]),pp_arg(Op), + D = Op#bottom.var, + Expr2 = ?RTL:alu_dst_update(Expr, D), + Inst = manufacture_computation(Pred,Expr2,Visited), + NewInsertion = #insertion{from=[{Op,D}],code=[Inst]}, + {D, gb_trees:insert(Pred,NewInsertion, InsertionsAcc)} + end; + #const_expr{} -> + case gb_trees:lookup(Pred,InsertionsAcc) of + {value,Insertion} -> + From = Insertion#insertion.from, + case lists:keyfind(Op, 1, From) of + false -> + ?pp_debug("~nThere have been insertions along the edge L~w already, but not for that operand | Op=",[Pred]),pp_arg(Op), + D = Op#const_expr.var, + Val = Op#const_expr.value, + Inst = ?RTL:mk_move(D, Val), + Code = Insertion#insertion.code, + NewInsertion = Insertion#insertion{from=[{Op,D}|From],code=[Inst|Code]}, + {D, gb_trees:update(Pred,NewInsertion,InsertionsAcc)}; + {_, Val} -> + ?pp_debug("~nThere have been insertions along the edge L~w already, and for that operand too | Op=",[Pred]),pp_arg(Op), + {Val, InsertionsAcc} + end; + none -> + ?pp_debug("~nThere has been no insertion along the edge L~w, (and not for that operand, of course)| Op=",[Pred]),pp_arg(Op), + D = Op#const_expr.var, + Val = Op#const_expr.value, + Inst = ?RTL:mk_move(D, Val), + NewInsertion = #insertion{from=[{Op,D}],code=[Inst]}, + {D, gb_trees:insert(Pred,NewInsertion, InsertionsAcc)} + end; + #eop{} -> + %% We treat expressions like bottoms + %% The value must be recomputed, and therefore not available... + case gb_trees:lookup(Pred,InsertionsAcc) of + {value,Insertion} -> + From = Insertion#insertion.from, + case lists:keyfind(Op, 1, From) of + false -> + ?pp_debug("~nThere has been insertions along the edge L~w already, but not for that operand | Op=",[Pred]),pp_arg(Op), + D = Op#eop.var, + Expr2 = ?RTL:alu_dst_update(Expr, D), + Inst = manufacture_computation(Pred,Expr2,Visited), + Code = Insertion#insertion.code, + NewInsertion = Insertion#insertion{from=[{Op,D}|From],code=[Inst|Code]}, + {D, gb_trees:update(Pred,NewInsertion, InsertionsAcc)}; + {_, Val} -> + ?pp_debug("~nThere has been insertions along the edge L~w already, and for that operand too | Op=",[Pred]),pp_arg(Op), + {Val, InsertionsAcc} + end; + none -> + ?pp_debug("~nThere has been no insertion along the edge L~w, (and not for that operand, of course)| Op=",[Pred]),pp_arg(Op), + D = Op#eop.var, + Expr2 = ?RTL:alu_dst_update(Expr, D), + Inst = manufacture_computation(Pred,Expr2,Visited), + NewInsertion = #insertion{from=[{Op,D}],code=[Inst]}, + {D, gb_trees:insert(Pred, NewInsertion, InsertionsAcc)} + end; + #temp{} -> + case gb_trees:lookup(Pred,InsertionsAcc) of + {value,Insertion} -> + From = Insertion#insertion.from, + case lists:keyfind(Op, 1, From) of + false -> + ?pp_debug("~nThere has been insertions along the edge L~w already, but not for that operand | Op=",[Pred]),pp_arg(Op), + Key = Op#temp.key, + {_V,Xsi} = ?GRAPH:vertex(XsiG,Key), + case Xsi#xsi.wba of + true -> + ?pp_debug("~nBut the operand is a WBA Xsi: no need for insertion",[]), + {Op#temp.var, InsertionsAcc}; + _ -> + ?pp_debug("~nBut the operand is a NOT WBA Xsi: we must make an insertion",[]), + D = ?RTL:mk_new_var(), + Expr2 = ?RTL:alu_dst_update(Expr, D), + Inst = manufacture_computation(Pred,Expr2,Visited), + Code = Insertion#insertion.code, + NewInsertion = Insertion#insertion{from=[{Op,D}|From],code=[Inst|Code]}, + {D, gb_trees:update(Pred, NewInsertion, InsertionsAcc)} + end; + {_, Val} -> + ?pp_debug("~nThere has been insertions along the edge L~w already, and for that operand too (Op=~w)",[Pred,Op]), + ?pp_debug("~nThis means, this temp is a WBA Xsi's definition",[]), + {Val, InsertionsAcc} + end; + none -> + ?pp_debug("~nThere has been no insertion along the edge L~w, (and not for that operand, of course | Op=",[Pred]),pp_arg(Op), + Key = Op#temp.key, + {_V,Xsi} = ?GRAPH:vertex(XsiG,Key), + case Xsi#xsi.wba of + true -> + ?pp_debug("~nBut the operand is a WBA Xsi: no need for insertion",[]), + {Op#temp.var, InsertionsAcc}; + _ -> + ?pp_debug("~nBut the operand is a NOT WBA Xsi: we must make an insertion",[]), + D = ?RTL:mk_new_var(), + Expr2 = ?RTL:alu_dst_update(Expr, D), + Inst = manufacture_computation(Pred,Expr2,Visited), + NewInsertion = #insertion{from=[{Op,D}],code=[Inst]}, + {D, gb_trees:insert(Pred, NewInsertion, InsertionsAcc)} + end + end; + _ -> + ?pp_debug("~nThe operand (Op=",[]),pp_arg(Op),?pp_debug(") is a real variable, no need for insertion along L~w",[Pred]), + {Op, InsertionsAcc} + end, NewXsiOp = XsiOp#xsi_op{op=Dst}, get_insertions(Ops, [NewXsiOp|OpAcc], NewInsertionsAcc, Visited, Expr, XsiG). |