mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-08 03:28:40 +02:00
Merge branch 'intrusive_deque' into 'main'
Use intrusive deques for RgObj movelists. See merge request freepascal.org/fpc/source!209
This commit is contained in:
Rika
commit
0be661d846
compiler
@ -394,6 +394,54 @@ type
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property NoClear:boolean write FNoClear;
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end;
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{********************************************
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TIntrusiveDeque
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********************************************}
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{ Also doubly-linked list, but lightweight (any management besides directly related to the deque concept is on user's behalf)
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and intrusive: you store nodes inside your objects as
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type
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PMyObject = ^TMyObject;
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TMyObject = object
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...
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node: TIntrusiveDequeNode;
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...
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end;
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pass them to deque methods as
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deque.PushBack(@myObj.node),
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and recover objects from node pointers by subtracting their offsets:
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myObj := PMyObject(pointer(nodePtr) - PtrUint(@PMyObject(nil)^.node)). }
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PIntrusiveDequeNode = ^TIntrusiveDequeNode;
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TIntrusiveDequeNode = record
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Next,Prev : PIntrusiveDequeNode;
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end;
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TIntrusiveDequeNodeCallback = procedure(node: PIntrusiveDequeNode; param: pointer);
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TIntrusiveDeque = object
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First,Last : PIntrusiveDequeNode;
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procedure Init;
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procedure Done;
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function Empty:boolean; {$ifdef CCLASSESINLINE}inline;{$endif}
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procedure Clear;
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{ Callback is allowed to destroy the node. }
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procedure Clear(cb : TIntrusiveDequeNodeCallback; param : pointer);
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procedure PushFront(Item : PIntrusiveDequeNode);
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procedure PushBack(Item : PIntrusiveDequeNode);
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procedure Remove(Item : PIntrusiveDequeNode);
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function PopFront:PIntrusiveDequeNode;
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function PopBack:PIntrusiveDequeNode;
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{ These make p empty. }
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procedure PushDequeFront(var p : TIntrusiveDeque);
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procedure PushDequeBack(var p : TIntrusiveDeque);
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end;
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{********************************************
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TCmdStrList
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********************************************}
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@ -2467,6 +2515,172 @@ end;
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end;
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{****************************************************************************
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TIntrusiveDeque
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****************************************************************************}
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procedure TIntrusiveDeque.Init;
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begin
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First:=nil;
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Last:=nil;
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end;
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procedure TIntrusiveDeque.Done;
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begin
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First:=nil;
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Last:=nil;
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end;
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function TIntrusiveDeque.Empty:boolean;
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begin
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result:=not Assigned(First);
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end;
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procedure TIntrusiveDeque.Clear;
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begin
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First:=nil;
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Last:=nil;
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end;
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procedure TIntrusiveDeque.Clear(cb : TIntrusiveDequeNodeCallback; param : pointer);
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var
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Cur,Next : PIntrusiveDequeNode;
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begin
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Cur:=First;
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First:=nil;
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Last:=nil;
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while Assigned(Cur) do
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begin
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Next:=Cur^.Next;
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cb(Cur,param);
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Cur:=Next;
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end;
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end;
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procedure TIntrusiveDeque.PushFront(Item : PIntrusiveDequeNode);
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var
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OrigFirst : PIntrusiveDequeNode;
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begin
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OrigFirst:=First;
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Item^.Next:=OrigFirst;
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Item^.Prev:=nil;
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First:=Item;
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if Assigned(OrigFirst) then
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OrigFirst^.Prev:=Item
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else
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Last:=Item;
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end;
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procedure TIntrusiveDeque.PushBack(Item : PIntrusiveDequeNode);
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var
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OrigLast : PIntrusiveDequeNode;
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begin
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OrigLast:=Last;
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Item^.Next:=nil;
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Item^.Prev:=OrigLast;
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Last:=Item;
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if Assigned(OrigLast) then
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OrigLast^.Next:=Item
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else
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First:=Item;
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end;
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procedure TIntrusiveDeque.Remove(Item : PIntrusiveDequeNode);
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var
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Next,Prev : PIntrusiveDequeNode;
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begin
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Next:=Item^.Next;
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Prev:=Item^.Prev;
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if Assigned(Next) then
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Next^.Prev:=Prev
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else
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Last:=Prev;
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if Assigned(Prev) then
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Prev^.Next:=Next
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else
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First:=Next;
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end;
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function TIntrusiveDeque.PopFront:PIntrusiveDequeNode;
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var
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NewFirst : PIntrusiveDequeNode;
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begin
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result:=First;
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if Assigned(result) then
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begin
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NewFirst:=result^.Next;
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First:=NewFirst;
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if Assigned(NewFirst) then
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NewFirst^.Prev:=nil
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else
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Last:=nil;
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end;
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end;
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function TIntrusiveDeque.PopBack:PIntrusiveDequeNode;
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var
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NewLast : PIntrusiveDequeNode;
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begin
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result:=Last;
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if Assigned(result) then
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begin
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NewLast:=result^.Prev;
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Last:=NewLast;
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if Assigned(NewLast) then
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NewLast^.Next:=nil
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else
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First:=nil;
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end;
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end;
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procedure TIntrusiveDeque.PushDequeFront(var p : TIntrusiveDeque);
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var
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PLast,OrigFirst : PIntrusiveDequeNode;
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begin
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PLast:=p.Last;
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if not Assigned(PLast) then
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exit;
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OrigFirst:=First;
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First:=p.First;
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PLast^.Next:=OrigFirst;
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p.First:=nil;
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p.Last:=nil;
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if Assigned(OrigFirst) then
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OrigFirst^.Prev:=PLast
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else
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Last:=PLast;
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end;
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procedure TIntrusiveDeque.PushDequeBack(var p : TIntrusiveDeque);
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var
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PFirst,OrigLast : PIntrusiveDequeNode;
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begin
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PFirst:=p.First;
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if not Assigned(PFirst) then
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exit;
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OrigLast:=Last;
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Last:=p.Last;
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PFirst^.Prev:=OrigLast;
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p.First:=nil;
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p.Last:=nil;
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if Assigned(OrigLast) then
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OrigLast^.Next:=PFirst
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else
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First:=PFirst;
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end;
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{****************************************************************************
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TCmdStrListItem
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****************************************************************************}
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@ -78,11 +78,13 @@ unit rgobj;
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Tmoveset=(ms_coalesced_moves,ms_constrained_moves,ms_frozen_moves,
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ms_worklist_moves,ms_active_moves);
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Tmoveins=class(Tlinkedlistitem)
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Tmoveins=record
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moveset:Tmoveset;
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x,y:Tsuperregister;
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id:longint;
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node:TIntrusiveDequeNode;
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end;
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Pmoveins=^Tmoveins;
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Tmovelistheader=record
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count,
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@ -92,7 +94,7 @@ unit rgobj;
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Tmovelist=record
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header : Tmovelistheader;
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data : array[tsuperregister] of Tmoveins;
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data : array[tsuperregister] of Pmoveins;
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end;
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Pmovelist=^Tmovelist;
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@ -256,7 +258,7 @@ unit rgobj;
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{ in this list we collect all moveins which should be disposed after register allocation finishes,
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we still need the moves for spill coalesce for the whole register allocation process, so they cannot be
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released as soon as they are frozen or whatever }
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move_garbage : Tlinkedlist;
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move_garbage : TIntrusiveDeque;
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extended_backwards,
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backwards_was_first : tbitset;
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has_usedmarks: boolean;
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@ -281,7 +283,7 @@ unit rgobj;
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function spill_registers(list:TAsmList;headertai:tai):boolean;virtual;
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function getnewreg(subreg:tsubregister):tsuperregister;
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procedure add_edges_used(u:Tsuperregister);
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procedure add_to_movelist(u:Tsuperregister;ins:Tmoveins);
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procedure add_to_movelist(u:Tsuperregister;ins:Pmoveins);
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function move_related(n:Tsuperregister):boolean;
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procedure make_work_list;
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procedure sort_simplify_worklist;
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@ -337,7 +339,7 @@ unit rgobj;
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procedure sort_movelist(ml:Pmovelist);
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var h,i,p:longword;
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t:Tmoveins;
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t:Pmoveins;
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begin
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with ml^ do
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@ -351,7 +353,7 @@ unit rgobj;
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i:=h;
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t:=data[i];
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repeat
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if data[i-p].id<=t.id then
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if data[i-p]^.id<=t^.id then
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break;
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data[i]:=data[i-p];
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dec(i,p);
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@ -455,8 +457,8 @@ unit rgobj;
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maxreginfo:=first_imaginary;
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maxreginfoinc:=16;
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moveins_id_counter:=0;
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worklist_moves:=Tlinkedlist.create;
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move_garbage:=TLinkedList.Create;
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worklist_moves.Init;
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move_garbage.Init;
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SetLength(reginfo,first_imaginary);
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for i:=0 to first_imaginary-1 do
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begin
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@ -482,6 +484,12 @@ unit rgobj;
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end;
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procedure DisposeOfMoveins(node: PIntrusiveDequeNode; param: pointer);
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begin
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dispose(Pmoveins(pointer(node)-PtrUint(@Pmoveins(nil)^.node)));
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end;
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destructor trgobj.destroy;
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begin
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spillednodes.done;
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@ -492,8 +500,10 @@ unit rgobj;
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selectstack.done;
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live_registers.done;
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move_garbage.free;
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worklist_moves.free;
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move_garbage.Clear(@DisposeOfMoveins,nil);
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move_garbage.Done;
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worklist_moves.Clear(@DisposeOfMoveins,nil);
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worklist_moves.Done;
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dispose_reginfo;
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extended_backwards.free;
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@ -791,7 +801,7 @@ unit rgobj;
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end;
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{$endif EXTDEBUG}
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procedure trgobj.add_to_movelist(u:Tsuperregister;ins:Tmoveins);
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procedure trgobj.add_to_movelist(u:Tsuperregister;ins:Pmoveins);
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begin
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{$ifdef EXTDEBUG}
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if (u>=maxreginfo) then
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@ -934,7 +944,7 @@ unit rgobj;
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{This procedure notifies a certain as a move instruction so the
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register allocator can try to eliminate it.}
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var i:Tmoveins;
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var i:Pmoveins;
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sreg, dreg : Tregister;
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ssupreg,dsupreg:Tsuperregister;
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@ -952,10 +962,10 @@ unit rgobj;
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if moveins_id_counter=high(moveins_id_counter) then
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internalerror(2021112701);
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inc(moveins_id_counter);
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i:=Tmoveins.create;
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i.id:=moveins_id_counter;
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i.moveset:=ms_worklist_moves;
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worklist_moves.insert(i);
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new(i);
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i^.id:=moveins_id_counter;
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i^.moveset:=ms_worklist_moves;
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worklist_moves.PushFront(@i^.node);
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ssupreg:=getsupreg(sreg);
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add_to_movelist(ssupreg,i);
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dsupreg:=getsupreg(dreg);
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@ -964,8 +974,8 @@ unit rgobj;
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if (ssupreg<>dsupreg) {and (getregtype(sreg)=getregtype(dreg))} then
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{Avoid adding the same move instruction twice to a single register.}
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add_to_movelist(dsupreg,i);
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i.x:=ssupreg;
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i.y:=dsupreg;
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i^.x:=ssupreg;
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i^.y:=dsupreg;
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end;
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function trgobj.move_related(n:Tsuperregister):boolean;
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@ -978,7 +988,7 @@ unit rgobj;
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if movelist<>nil then
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with movelist^ do
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for i:=0 to header.count-1 do
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if Tmoveins(data[i]).moveset in [ms_worklist_moves,ms_active_moves] then
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if data[i]^.moveset in [ms_worklist_moves,ms_active_moves] then
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begin
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move_related:=true;
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break;
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@ -1105,16 +1115,16 @@ unit rgobj;
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procedure trgobj.prepare_colouring;
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begin
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make_work_list;
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active_moves:=Tlinkedlist.create;
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frozen_moves:=Tlinkedlist.create;
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coalesced_moves:=Tlinkedlist.create;
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constrained_moves:=Tlinkedlist.create;
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active_moves.Init;
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frozen_moves.Init;
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coalesced_moves.Init;
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constrained_moves.Init;
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selectstack.clear;
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end;
|
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|
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procedure trgobj.enable_moves(n:Tsuperregister);
|
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|
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var m:Tlinkedlistitem;
|
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var m:Pmoveins;
|
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i:cardinal;
|
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|
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begin
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@ -1123,12 +1133,12 @@ unit rgobj;
|
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for i:=0 to movelist^.header.count-1 do
|
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begin
|
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m:=movelist^.data[i];
|
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if Tmoveins(m).moveset=ms_active_moves then
|
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if m^.moveset=ms_active_moves then
|
||||
begin
|
||||
{Move m from the set active_moves to the set worklist_moves.}
|
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active_moves.remove(m);
|
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Tmoveins(m).moveset:=ms_worklist_moves;
|
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worklist_moves.concat(m);
|
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active_moves.remove(@m^.node);
|
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m^.moveset:=ms_worklist_moves;
|
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worklist_moves.PushBack(@m^.node);
|
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end;
|
||||
end;
|
||||
end;
|
||||
@ -1329,7 +1339,7 @@ unit rgobj;
|
||||
var adj : Psuperregisterworklist;
|
||||
original_u_count, i,n,p,q:cardinal;
|
||||
t : tsuperregister;
|
||||
searched:Tmoveins;
|
||||
searched:Pmoveins;
|
||||
found : boolean;
|
||||
|
||||
begin
|
||||
@ -1376,7 +1386,7 @@ unit rgobj;
|
||||
if q<>0 then
|
||||
repeat
|
||||
i:=(p+q) shr 1;
|
||||
if searched.id>reginfo[u].movelist^.data[i].id then
|
||||
if searched^.id>reginfo[u].movelist^.data[i]^.id then
|
||||
p:=i+1
|
||||
else
|
||||
q:=i;
|
||||
@ -1389,7 +1399,7 @@ unit rgobj;
|
||||
{ no need to search the instructions we've already added
|
||||
from v, we know we won't find a match there }
|
||||
for i:=header.sorted_until+1 to original_u_count-1 do
|
||||
if searched.id=data[i].id then
|
||||
if searched^.id=data[i]^.id then
|
||||
begin
|
||||
found:=true;
|
||||
break;
|
||||
@ -1445,13 +1455,13 @@ unit rgobj;
|
||||
|
||||
procedure trgobj.coalesce;
|
||||
|
||||
var m:Tmoveins;
|
||||
var m:Pmoveins;
|
||||
x,y,u,v:cardinal;
|
||||
|
||||
begin
|
||||
m:=Tmoveins(worklist_moves.getfirst);
|
||||
x:=get_alias(m.x);
|
||||
y:=get_alias(m.y);
|
||||
m:=pointer(worklist_moves.PopFront)-PtrUint(@Pmoveins(nil)^.node);
|
||||
x:=get_alias(m^.x);
|
||||
y:=get_alias(m^.y);
|
||||
if (y<first_imaginary) then
|
||||
begin
|
||||
u:=y;
|
||||
@ -1464,8 +1474,8 @@ unit rgobj;
|
||||
end;
|
||||
if (u=v) then
|
||||
begin
|
||||
m.moveset:=ms_coalesced_moves; {Already coalesced.}
|
||||
coalesced_moves.insert(m);
|
||||
m^.moveset:=ms_coalesced_moves; {Already coalesced.}
|
||||
coalesced_moves.PushFront(@m^.node);
|
||||
add_worklist(u);
|
||||
end
|
||||
{Do u and v interfere? In that case the move is constrained. Two
|
||||
@ -1473,8 +1483,8 @@ unit rgobj;
|
||||
code u is precoloured, thus interference...}
|
||||
else if (v<first_imaginary) or ibitmap[u,v] then
|
||||
begin
|
||||
m.moveset:=ms_constrained_moves; {Cannot coalesce yet...}
|
||||
constrained_moves.insert(m);
|
||||
m^.moveset:=ms_constrained_moves; {Cannot coalesce yet...}
|
||||
constrained_moves.PushFront(@m^.node);
|
||||
add_worklist(u);
|
||||
add_worklist(v);
|
||||
end
|
||||
@ -1488,22 +1498,22 @@ unit rgobj;
|
||||
((v>=first_imaginary) or
|
||||
(v in usable_register_set)) then
|
||||
begin
|
||||
m.moveset:=ms_coalesced_moves; {Move coalesced!}
|
||||
coalesced_moves.insert(m);
|
||||
m^.moveset:=ms_coalesced_moves; {Move coalesced!}
|
||||
coalesced_moves.PushFront(@m^.node);
|
||||
combine(u,v);
|
||||
add_worklist(u);
|
||||
end
|
||||
else
|
||||
begin
|
||||
m.moveset:=ms_active_moves;
|
||||
active_moves.insert(m);
|
||||
m^.moveset:=ms_active_moves;
|
||||
active_moves.PushFront(@m^.node);
|
||||
end;
|
||||
end;
|
||||
|
||||
procedure trgobj.freeze_moves(u:Tsuperregister);
|
||||
|
||||
var i:cardinal;
|
||||
m:Tlinkedlistitem;
|
||||
m:Pmoveins;
|
||||
v,x,y:Tsuperregister;
|
||||
|
||||
begin
|
||||
@ -1511,21 +1521,21 @@ unit rgobj;
|
||||
for i:=0 to reginfo[u].movelist^.header.count-1 do
|
||||
begin
|
||||
m:=reginfo[u].movelist^.data[i];
|
||||
if Tmoveins(m).moveset in [ms_worklist_moves,ms_active_moves] then
|
||||
if m^.moveset in [ms_worklist_moves,ms_active_moves] then
|
||||
begin
|
||||
x:=Tmoveins(m).x;
|
||||
y:=Tmoveins(m).y;
|
||||
x:=m^.x;
|
||||
y:=m^.y;
|
||||
if get_alias(y)=get_alias(u) then
|
||||
v:=get_alias(x)
|
||||
else
|
||||
v:=get_alias(y);
|
||||
{Move m from active_moves/worklist_moves to frozen_moves.}
|
||||
if Tmoveins(m).moveset=ms_active_moves then
|
||||
active_moves.remove(m)
|
||||
if m^.moveset=ms_active_moves then
|
||||
active_moves.remove(@m^.node)
|
||||
else
|
||||
worklist_moves.remove(m);
|
||||
Tmoveins(m).moveset:=ms_frozen_moves;
|
||||
frozen_moves.insert(m);
|
||||
worklist_moves.remove(@m^.node);
|
||||
m^.moveset:=ms_frozen_moves;
|
||||
frozen_moves.PushFront(@m^.node);
|
||||
|
||||
if (v>=first_imaginary) and not(move_related(v)) and
|
||||
(reginfo[v].degree<usable_registers_cnt) then
|
||||
@ -1834,23 +1844,19 @@ unit rgobj;
|
||||
begin
|
||||
{ remove all items from the worklists, but do not free them, they are still needed for spill coalesce }
|
||||
|
||||
move_garbage.concatList(worklist_moves);
|
||||
move_garbage.PushDequeBack(worklist_moves);
|
||||
|
||||
move_garbage.concatList(active_moves);
|
||||
active_moves.Free;
|
||||
active_moves:=nil;
|
||||
move_garbage.PushDequeBack(active_moves);
|
||||
active_moves.Done;
|
||||
|
||||
move_garbage.concatList(frozen_moves);
|
||||
frozen_moves.Free;
|
||||
frozen_moves:=nil;
|
||||
move_garbage.PushDequeBack(frozen_moves);
|
||||
frozen_moves.Done;
|
||||
|
||||
move_garbage.concatList(coalesced_moves);
|
||||
coalesced_moves.Free;
|
||||
coalesced_moves:=nil;
|
||||
move_garbage.PushDequeBack(coalesced_moves);
|
||||
coalesced_moves.Done;
|
||||
|
||||
move_garbage.concatList(constrained_moves);
|
||||
constrained_moves.Free;
|
||||
constrained_moves:=nil;
|
||||
move_garbage.PushDequeBack(constrained_moves);
|
||||
constrained_moves.Done;
|
||||
end;
|
||||
|
||||
|
||||
@ -2474,8 +2480,8 @@ unit rgobj;
|
||||
assigned(reginfo[t].movelist) then
|
||||
for j:=0 to reginfo[t].movelist^.header.count-1 do
|
||||
begin
|
||||
x:=Tmoveins(reginfo[t].movelist^.data[j]).x;
|
||||
y:=Tmoveins(reginfo[t].movelist^.data[j]).y;
|
||||
x:=reginfo[t].movelist^.data[j]^.x;
|
||||
y:=reginfo[t].movelist^.data[j]^.y;
|
||||
if (x=t) and
|
||||
(spillinfo[get_alias(y)].spilled) and
|
||||
not(spillinfo[get_alias(y)].interferences[0,t]) then
|
||||
|
||||
Loading…
Reference in New Issue
Block a user