[dev.regabi] cmd/compile: use Node getters and setters [generated]

Now that we have all the getters and setters defined, use them
and unexport all the actual Node fields. This is the next step
toward replacing Node with an interface.

[git-generate]
cd src/cmd/compile/internal/gc
rf '
        ex . ../ir ../ssa {
                import "cmd/compile/internal/ir"
                import "cmd/compile/internal/types"
                import "cmd/internal/src"
                var n, x *ir.Node
                var op ir.Op
                var t *types.Type
                var f *ir.Func
                var m *ir.Name
                var s *types.Sym
                var p src.XPos
                var i int64
                var e uint16
                var nodes ir.Nodes

                n.Op = op    -> n.SetOp(op)
                n.Left = x   -> n.SetLeft(x)
                n.Right = x  -> n.SetRight(x)
                n.Orig = x -> n.SetOrig(x)
                n.Type = t -> n.SetType(t)
                n.Func = f -> n.SetFunc(f)
                n.Name = m -> n.SetName(m)
                n.Sym = s -> n.SetSym(s)
                n.Pos = p -> n.SetPos(p)
                n.Xoffset = i -> n.SetXoffset(i)
                n.Esc = e -> n.SetEsc(e)

                n.Ninit.Append -> n.PtrNinit().Append
                n.Ninit.AppendNodes -> n.PtrNinit().AppendNodes
                n.Ninit.MoveNodes -> n.PtrNinit().MoveNodes
                n.Ninit.Prepend -> n.PtrNinit().Prepend
                n.Ninit.Set -> n.PtrNinit().Set
                n.Ninit.Set1 -> n.PtrNinit().Set1
                n.Ninit.Set2 -> n.PtrNinit().Set2
                n.Ninit.Set3 -> n.PtrNinit().Set3
                &n.Ninit -> n.PtrNinit()
                n.Ninit = nodes -> n.SetNinit(nodes)

                n.Nbody.Append -> n.PtrNbody().Append
                n.Nbody.AppendNodes -> n.PtrNbody().AppendNodes
                n.Nbody.MoveNodes -> n.PtrNbody().MoveNodes
                n.Nbody.Prepend -> n.PtrNbody().Prepend
                n.Nbody.Set -> n.PtrNbody().Set
                n.Nbody.Set1 -> n.PtrNbody().Set1
                n.Nbody.Set2 -> n.PtrNbody().Set2
                n.Nbody.Set3 -> n.PtrNbody().Set3
                &n.Nbody -> n.PtrNbody()
                n.Nbody = nodes -> n.SetNbody(nodes)

                n.List.Append -> n.PtrList().Append
                n.List.AppendNodes -> n.PtrList().AppendNodes
                n.List.MoveNodes -> n.PtrList().MoveNodes
                n.List.Prepend -> n.PtrList().Prepend
                n.List.Set -> n.PtrList().Set
                n.List.Set1 -> n.PtrList().Set1
                n.List.Set2 -> n.PtrList().Set2
                n.List.Set3 -> n.PtrList().Set3
                &n.List -> n.PtrList()
                n.List = nodes -> n.SetList(nodes)

                n.Rlist.Append -> n.PtrRlist().Append
                n.Rlist.AppendNodes -> n.PtrRlist().AppendNodes
                n.Rlist.MoveNodes -> n.PtrRlist().MoveNodes
                n.Rlist.Prepend -> n.PtrRlist().Prepend
                n.Rlist.Set -> n.PtrRlist().Set
                n.Rlist.Set1 -> n.PtrRlist().Set1
                n.Rlist.Set2 -> n.PtrRlist().Set2
                n.Rlist.Set3 -> n.PtrRlist().Set3
                &n.Rlist -> n.PtrRlist()
                n.Rlist = nodes -> n.SetRlist(nodes)
        }
        ex . ../ir ../ssa {
                import "cmd/compile/internal/ir"

                var n *ir.Node
                n.Op         -> n.GetOp()
                n.Left       -> n.GetLeft()
                n.Right      -> n.GetRight()
                n.Orig -> n.GetOrig()
                n.Type -> n.GetType()
                n.Func -> n.GetFunc()
                n.Name -> n.GetName()
                n.Sym -> n.GetSym()
                n.Pos -> n.GetPos()
                n.Xoffset -> n.GetXoffset()
                n.Esc -> n.GetEsc()

                avoid (*ir.Node).PtrNinit
                avoid (*ir.Node).PtrNbody
                avoid (*ir.Node).PtrList
                avoid (*ir.Node).PtrRlist

                n.Ninit -> n.GetNinit()
                n.Nbody -> n.GetNbody()
                n.List -> n.GetList()
                n.Rlist -> n.GetRlist()
        }
'

cd ../ir
rf '
        mv Node.Op Node.op
        mv Node.GetOp Node.Op

        mv Node.Left Node.left
        mv Node.GetLeft Node.Left

        mv Node.Right Node.right
        mv Node.GetRight Node.Right

        mv Node.Orig Node.orig
        mv Node.GetOrig Node.Orig

        mv Node.Type Node.typ
        mv Node.GetType Node.Type

        mv Node.Func Node.fn
        mv Node.GetFunc Node.Func

        mv Node.Name Node.name
        mv Node.GetName Node.Name

        # All uses are in other Node methods already.
        mv Node.E Node.e

        mv Node.Sym Node.sym
        mv Node.GetSym Node.Sym

        mv Node.Pos Node.pos
        mv Node.GetPos Node.Pos

        mv Node.Esc Node.esc
        mv Node.GetEsc Node.Esc

	# While we are here, rename Xoffset to more idiomatic Offset.
        mv Node.Xoffset Node.offset
        mv Node.GetXoffset Node.Offset
	mv Node.SetXoffset Node.SetOffset

        # While we are here, rename Ninit, Nbody to more idiomatic Init, Body.
        mv Node.Ninit Node.init
        mv Node.GetNinit Node.Init
        mv Node.PtrNinit Node.PtrInit
        mv Node.SetNinit Node.SetInit
        mv Node.Nbody Node.body
        mv Node.GetNbody Node.Body
        mv Node.PtrNbody Node.PtrBody
        mv Node.SetNbody Node.SetBody
        mv Node.List Node.list
        mv Node.GetList Node.List
        mv Node.Rlist Node.rlist
        mv Node.GetRlist Node.Rlist

        # Unexport these
        mv Node.SetHasOpt Node.setHasOpt
        mv Node.SetHasVal Node.setHasVal
'

Change-Id: I9894f633375c5237a29b6d6d7b89ba181b56ca3a
Reviewed-on: https://go-review.googlesource.com/c/go/+/273009
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

src/cmd/compile/internal/gc/init.go

@@ -46,16 +46,16 @@ func fninit(n []*ir.Node) {
 
 	// Make a function that contains all the initialization statements.
 	if len(nf) > 0 {
-		base.Pos = nf[0].Pos // prolog/epilog gets line number of first init stmt
+		base.Pos = nf[0].Pos() // prolog/epilog gets line number of first init stmt
 		initializers := lookup("init")
 		fn := dclfunc(initializers, ir.Nod(ir.OTFUNC, nil, nil))
-		for _, dcl := range initTodo.Func.Dcl {
-			dcl.Name.Curfn = fn
+		for _, dcl := range initTodo.Func().Dcl {
+			dcl.Name().Curfn = fn
 		}
-		fn.Func.Dcl = append(fn.Func.Dcl, initTodo.Func.Dcl...)
-		initTodo.Func.Dcl = nil
+		fn.Func().Dcl = append(fn.Func().Dcl, initTodo.Func().Dcl...)
+		initTodo.Func().Dcl = nil
 
-		fn.Nbody.Set(nf)
+		fn.PtrBody().Set(nf)
 		funcbody()
 
 		fn = typecheck(fn, ctxStmt)
@@ -65,7 +65,7 @@ func fninit(n []*ir.Node) {
 		xtop = append(xtop, fn)
 		fns = append(fns, initializers.Linksym())
 	}
-	if initTodo.Func.Dcl != nil {
+	if initTodo.Func().Dcl != nil {
 		// We only generate temps using initTodo if there
 		// are package-scope initialization statements, so
 		// something's weird if we get here.
@@ -76,9 +76,9 @@ func fninit(n []*ir.Node) {
 	// Record user init functions.
 	for i := 0; i < renameinitgen; i++ {
 		s := lookupN("init.", i)
-		fn := ir.AsNode(s.Def).Name.Defn
+		fn := ir.AsNode(s.Def).Name().Defn
 		// Skip init functions with empty bodies.
-		if fn.Nbody.Len() == 1 && fn.Nbody.First().Op == ir.OEMPTY {
+		if fn.Body().Len() == 1 && fn.Body().First().Op() == ir.OEMPTY {
 			continue
 		}
 		fns = append(fns, s.Linksym())
@@ -91,7 +91,7 @@ func fninit(n []*ir.Node) {
 	// Make an .inittask structure.
 	sym := lookup(".inittask")
 	nn := NewName(sym)
-	nn.Type = types.Types[types.TUINT8] // fake type
+	nn.SetType(types.Types[types.TUINT8]) // fake type
 	nn.SetClass(ir.PEXTERN)
 	sym.Def = ir.AsTypesNode(nn)
 	exportsym(nn)