[dev.regabi] cmd/compile: remove Nodes.Set [generated]

Just "=". It's cleaner.

Passes toolstash -cmp.

[git-generate]
cd src/cmd/compile/internal/ir
pkgs=$(go list . ../...)
rf '
	ex '"$(echo $pkgs)"' {
		var l Nodes
		var p *Nodes

		p.Set(l) -> *p = l
	}

	ex '"$(echo $pkgs)"' {
		var n InitNode
		var l Nodes

		*n.PtrInit() = l -> n.SetInit(l)
	}

	rm Nodes.Set
'

Change-Id: Ic97219792243667146a02776553942ae1189ff7d
Reviewed-on: https://go-review.googlesource.com/c/go/+/281002
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>

21 files changed, 74 insertions, 78 deletions

diff --git a/src/cmd/compile/internal/deadcode/deadcode.go b/src/cmd/compile/internal/deadcode/deadcode.go
index 474532bc17..c409320fc4 100644
--- a/src/cmd/compile/internal/deadcode/deadcode.go
+++ b/src/cmd/compile/internal/deadcode/deadcode.go
@@ -38,7 +38,7 @@ func Func(fn *ir.Func) {
 		}
 	}
 
-	fn.Body.Set([]ir.Node{ir.NewBlockStmt(base.Pos, nil)})
+	fn.Body = []ir.Node{ir.NewBlockStmt(base.Pos, nil)}
 }
 
 func stmts(nn *ir.Nodes) {
@@ -114,7 +114,7 @@ func stmts(nn *ir.Nodes) {
 		}
 
 		if cut {
-			nn.Set((*nn)[:i+1])
+			*nn = (*nn)[:i+1]
 			break
 		}
 	}
diff --git a/src/cmd/compile/internal/inline/inl.go b/src/cmd/compile/internal/inline/inl.go
index 24fbe3dac0..2887abb061 100644
--- a/src/cmd/compile/internal/inline/inl.go
+++ b/src/cmd/compile/internal/inline/inl.go
@@ -544,7 +544,7 @@ func inlnode(n ir.Node, maxCost int32, inlMap map[*ir.Func]bool, edit func(ir.No
 	if as := n; as.Op() == ir.OAS2FUNC {
 		as := as.(*ir.AssignListStmt)
 		if as.Rhs[0].Op() == ir.OINLCALL {
-			as.Rhs.Set(inlconv2list(as.Rhs[0].(*ir.InlinedCallExpr)))
+			as.Rhs = inlconv2list(as.Rhs[0].(*ir.InlinedCallExpr))
 			as.SetOp(ir.OAS2)
 			as.SetTypecheck(0)
 			n = typecheck.Stmt(as)
@@ -867,7 +867,7 @@ func mkinlcall(n *ir.CallExpr, fn *ir.Func, maxCost int32, inlMap map[*ir.Func]b
 			vas.Y.SetType(param.Type)
 		} else {
 			lit := ir.NewCompLitExpr(base.Pos, ir.OCOMPLIT, ir.TypeNode(param.Type), nil)
-			lit.List.Set(varargs)
+			lit.List = varargs
 			vas.Y = lit
 		}
 	}
@@ -944,9 +944,9 @@ func mkinlcall(n *ir.CallExpr, fn *ir.Func, maxCost int32, inlMap map[*ir.Func]b
 	//dumplist("ninit post", ninit);
 
 	call := ir.NewInlinedCallExpr(base.Pos, nil, nil)
-	call.PtrInit().Set(ninit)
-	call.Body.Set(body)
-	call.ReturnVars.Set(retvars)
+	*call.PtrInit() = ninit
+	call.Body = body
+	call.ReturnVars = retvars
 	call.SetType(n.Type())
 	call.SetTypecheck(1)
 
@@ -1120,7 +1120,7 @@ func (subst *inlsubst) node(n ir.Node) ir.Node {
 			for _, n := range subst.retvars {
 				as.Lhs.Append(n)
 			}
-			as.Rhs.Set(subst.list(n.Results))
+			as.Rhs = subst.list(n.Results)
 
 			if subst.delayretvars {
 				for _, n := range as.Lhs {
@@ -1139,7 +1139,7 @@ func (subst *inlsubst) node(n ir.Node) ir.Node {
 		n := n.(*ir.BranchStmt)
 		m := ir.Copy(n).(*ir.BranchStmt)
 		m.SetPos(subst.updatedPos(m.Pos()))
-		m.PtrInit().Set(nil)
+		*m.PtrInit() = nil
 		p := fmt.Sprintf("%s·%d", n.Label.Name, inlgen)
 		m.Label = typecheck.Lookup(p)
 		return m
@@ -1148,7 +1148,7 @@ func (subst *inlsubst) node(n ir.Node) ir.Node {
 		n := n.(*ir.LabelStmt)
 		m := ir.Copy(n).(*ir.LabelStmt)
 		m.SetPos(subst.updatedPos(m.Pos()))
-		m.PtrInit().Set(nil)
+		*m.PtrInit() = nil
 		p := fmt.Sprintf("%s·%d", n.Label.Name, inlgen)
 		m.Label = typecheck.Lookup(p)
 		return m
diff --git a/src/cmd/compile/internal/ir/expr.go b/src/cmd/compile/internal/ir/expr.go
index 88fbdff1e0..1b88427146 100644
--- a/src/cmd/compile/internal/ir/expr.go
+++ b/src/cmd/compile/internal/ir/expr.go
@@ -67,7 +67,7 @@ func NewAddStringExpr(pos src.XPos, list []Node) *AddStringExpr {
 	n := &AddStringExpr{}
 	n.pos = pos
 	n.op = OADDSTR
-	n.List.Set(list)
+	n.List = list
 	return n
 }
 
@@ -173,7 +173,7 @@ func NewCallExpr(pos src.XPos, op Op, fun Node, args []Node) *CallExpr {
 	n.pos = pos
 	n.orig = n
 	n.SetOp(op)
-	n.Args.Set(args)
+	n.Args = args
 	return n
 }
 
@@ -231,7 +231,7 @@ func NewCompLitExpr(pos src.XPos, op Op, typ Ntype, list []Node) *CompLitExpr {
 	n := &CompLitExpr{Ntype: typ}
 	n.pos = pos
 	n.SetOp(op)
-	n.List.Set(list)
+	n.List = list
 	n.orig = n
 	return n
 }
@@ -364,8 +364,8 @@ func NewInlinedCallExpr(pos src.XPos, body, retvars []Node) *InlinedCallExpr {
 	n := &InlinedCallExpr{}
 	n.pos = pos
 	n.op = OINLCALL
-	n.Body.Set(body)
-	n.ReturnVars.Set(retvars)
+	n.Body = body
+	n.ReturnVars = retvars
 	return n
 }
 
diff --git a/src/cmd/compile/internal/ir/node.go b/src/cmd/compile/internal/ir/node.go
index 9945cc987a..9d1ee17aa8 100644
--- a/src/cmd/compile/internal/ir/node.go
+++ b/src/cmd/compile/internal/ir/node.go
@@ -323,10 +323,6 @@ const (
 // a slice to save space.
 type Nodes []Node
 
-// Set sets n to a slice.
-// This takes ownership of the slice.
-func (n *Nodes) Set(s []Node) { *n = s }
-
 // Append appends entries to Nodes.
 func (n *Nodes) Append(a ...Node) {
 	if len(a) == 0 {
diff --git a/src/cmd/compile/internal/ir/stmt.go b/src/cmd/compile/internal/ir/stmt.go
index 9c2cba9a08..b13c6b7795 100644
--- a/src/cmd/compile/internal/ir/stmt.go
+++ b/src/cmd/compile/internal/ir/stmt.go
@@ -70,8 +70,8 @@ func NewAssignListStmt(pos src.XPos, op Op, lhs, rhs []Node) *AssignListStmt {
 	n := &AssignListStmt{}
 	n.pos = pos
 	n.SetOp(op)
-	n.Lhs.Set(lhs)
-	n.Rhs.Set(rhs)
+	n.Lhs = lhs
+	n.Rhs = rhs
 	return n
 }
 
@@ -141,7 +141,7 @@ func NewBlockStmt(pos src.XPos, list []Node) *BlockStmt {
 		}
 	}
 	n.op = OBLOCK
-	n.List.Set(list)
+	n.List = list
 	return n
 }
 
@@ -216,7 +216,7 @@ func NewForStmt(pos src.XPos, init Node, cond, post Node, body []Node) *ForStmt
 	if init != nil {
 		n.init = []Node{init}
 	}
-	n.Body.Set(body)
+	n.Body = body
 	return n
 }
 
@@ -262,8 +262,8 @@ func NewIfStmt(pos src.XPos, cond Node, body, els []Node) *IfStmt {
 	n := &IfStmt{Cond: cond}
 	n.pos = pos
 	n.op = OIF
-	n.Body.Set(body)
-	n.Else.Set(els)
+	n.Body = body
+	n.Else = els
 	return n
 }
 
@@ -315,7 +315,7 @@ func NewRangeStmt(pos src.XPos, key, value, x Node, body []Node) *RangeStmt {
 	n := &RangeStmt{X: x, Key: key, Value: value}
 	n.pos = pos
 	n.op = ORANGE
-	n.Body.Set(body)
+	n.Body = body
 	return n
 }
 
@@ -331,7 +331,7 @@ func NewReturnStmt(pos src.XPos, results []Node) *ReturnStmt {
 	n.pos = pos
 	n.op = ORETURN
 	n.orig = n
-	n.Results.Set(results)
+	n.Results = results
 	return n
 }
 
diff --git a/src/cmd/compile/internal/noder/noder.go b/src/cmd/compile/internal/noder/noder.go
index 948833f46e..678e378291 100644
--- a/src/cmd/compile/internal/noder/noder.go
+++ b/src/cmd/compile/internal/noder/noder.go
@@ -245,7 +245,7 @@ func (p *noder) funcBody(fn *ir.Func, block *syntax.BlockStmt) {
 		if body == nil {
 			body = []ir.Node{ir.NewBlockStmt(base.Pos, nil)}
 		}
-		fn.Body.Set(body)
+		fn.Body = body
 
 		base.Pos = p.makeXPos(block.Rbrace)
 		fn.Endlineno = base.Pos
@@ -772,7 +772,7 @@ func (p *noder) expr(expr syntax.Expr) ir.Node {
 		for i, e := range l {
 			l[i] = p.wrapname(expr.ElemList[i], e)
 		}
-		n.List.Set(l)
+		n.List = l
 		base.Pos = p.makeXPos(expr.Rbrace)
 		return n
 	case *syntax.KeyValueExpr:
@@ -1128,8 +1128,8 @@ func (p *noder) stmtFall(stmt syntax.Stmt, fallOK bool) ir.Node {
 		if list, ok := stmt.Lhs.(*syntax.ListExpr); ok && len(list.ElemList) != 1 || len(rhs) != 1 {
 			n := ir.NewAssignListStmt(p.pos(stmt), ir.OAS2, nil, nil)
 			n.Def = stmt.Op == syntax.Def
-			n.Lhs.Set(p.assignList(stmt.Lhs, n, n.Def))
-			n.Rhs.Set(rhs)
+			n.Lhs = p.assignList(stmt.Lhs, n, n.Def)
+			n.Rhs = rhs
 			return n
 		}
 
@@ -1276,7 +1276,7 @@ func (p *noder) ifStmt(stmt *syntax.IfStmt) ir.Node {
 		e := p.stmt(stmt.Else)
 		if e.Op() == ir.OBLOCK {
 			e := e.(*ir.BlockStmt)
-			n.Else.Set(e.List)
+			n.Else = e.List
 		} else {
 			n.Else = []ir.Node{e}
 		}
@@ -1301,7 +1301,7 @@ func (p *noder) forStmt(stmt *syntax.ForStmt) ir.Node {
 				n.Value = lhs[1]
 			}
 		}
-		n.Body.Set(p.blockStmt(stmt.Body))
+		n.Body = p.blockStmt(stmt.Body)
 		p.closeAnotherScope()
 		return n
 	}
@@ -1359,7 +1359,7 @@ func (p *noder) caseClauses(clauses []*syntax.CaseClause, tswitch *ir.TypeSwitch
 			body = body[:len(body)-1]
 		}
 
-		n.Body.Set(p.stmtsFall(body, true))
+		n.Body = p.stmtsFall(body, true)
 		if l := len(n.Body); l > 0 && n.Body[l-1].Op() == ir.OFALL {
 			if tswitch != nil {
 				base.Errorf("cannot fallthrough in type switch")
diff --git a/src/cmd/compile/internal/pkginit/init.go b/src/cmd/compile/internal/pkginit/init.go
index 24fe1a7628..a32e09879c 100644
--- a/src/cmd/compile/internal/pkginit/init.go
+++ b/src/cmd/compile/internal/pkginit/init.go
@@ -49,7 +49,7 @@ func Task() *ir.Name {
 		fn.Dcl = append(fn.Dcl, typecheck.InitTodoFunc.Dcl...)
 		typecheck.InitTodoFunc.Dcl = nil
 
-		fn.Body.Set(nf)
+		fn.Body = nf
 		typecheck.FinishFuncBody()
 
 		typecheck.Func(fn)
diff --git a/src/cmd/compile/internal/reflectdata/reflect.go b/src/cmd/compile/internal/reflectdata/reflect.go
index 5f88262ddf..f926765326 100644
--- a/src/cmd/compile/internal/reflectdata/reflect.go
+++ b/src/cmd/compile/internal/reflectdata/reflect.go
@@ -1798,7 +1798,7 @@ func methodWrapper(rcvr *types.Type, method *types.Field) *obj.LSym {
 	} else {
 		fn.SetWrapper(true) // ignore frame for panic+recover matching
 		call := ir.NewCallExpr(base.Pos, ir.OCALL, dot, nil)
-		call.Args.Set(ir.ParamNames(tfn.Type()))
+		call.Args = ir.ParamNames(tfn.Type())
 		call.IsDDD = tfn.Type().IsVariadic()
 		if method.Type.NumResults() > 0 {
 			ret := ir.NewReturnStmt(base.Pos, nil)
diff --git a/src/cmd/compile/internal/ssagen/abi.go b/src/cmd/compile/internal/ssagen/abi.go
index cd5d962b91..1c013dd2d8 100644
--- a/src/cmd/compile/internal/ssagen/abi.go
+++ b/src/cmd/compile/internal/ssagen/abi.go
@@ -303,7 +303,7 @@ func makeABIWrapper(f *ir.Func, wrapperABI obj.ABI) {
 		tail = ir.NewBranchStmt(base.Pos, ir.ORETJMP, f.Nname.Sym())
 	} else {
 		call := ir.NewCallExpr(base.Pos, ir.OCALL, f.Nname, nil)
-		call.Args.Set(ir.ParamNames(tfn.Type()))
+		call.Args = ir.ParamNames(tfn.Type())
 		call.IsDDD = tfn.Type().IsVariadic()
 		tail = call
 		if tfn.Type().NumResults() > 0 {
diff --git a/src/cmd/compile/internal/typecheck/const.go b/src/cmd/compile/internal/typecheck/const.go
index 5259218ef9..d6bf101974 100644
--- a/src/cmd/compile/internal/typecheck/const.go
+++ b/src/cmd/compile/internal/typecheck/const.go
@@ -509,7 +509,7 @@ func EvalConst(n ir.Node) ir.Node {
 				}
 
 				nl := ir.Copy(n).(*ir.AddStringExpr)
-				nl.List.Set(s[i:i2])
+				nl.List = s[i:i2]
 				newList = append(newList, OrigConst(nl, constant.MakeString(strings.Join(strs, ""))))
 				i = i2 - 1
 			} else {
@@ -518,7 +518,7 @@ func EvalConst(n ir.Node) ir.Node {
 		}
 
 		nn := ir.Copy(n).(*ir.AddStringExpr)
-		nn.List.Set(newList)
+		nn.List = newList
 		return nn
 
 	case ir.OCAP, ir.OLEN:
diff --git a/src/cmd/compile/internal/typecheck/func.go b/src/cmd/compile/internal/typecheck/func.go
index 296755028d..8592397004 100644
--- a/src/cmd/compile/internal/typecheck/func.go
+++ b/src/cmd/compile/internal/typecheck/func.go
@@ -52,7 +52,7 @@ func FixVariadicCall(call *ir.CallExpr) {
 		extra[i] = nil // allow GC
 	}
 
-	call.Args.Set(append(args[:vi], slice))
+	call.Args = append(args[:vi], slice)
 	call.IsDDD = true
 }
 
@@ -313,7 +313,7 @@ func MethodValueWrapper(dot *ir.SelectorExpr) *ir.Func {
 	}
 
 	call := ir.NewCallExpr(base.Pos, ir.OCALL, ir.NewSelectorExpr(base.Pos, ir.OXDOT, ptr, meth), nil)
-	call.Args.Set(ir.ParamNames(tfn.Type()))
+	call.Args = ir.ParamNames(tfn.Type())
 	call.IsDDD = tfn.Type().IsVariadic()
 	if t0.NumResults() != 0 {
 		ret := ir.NewReturnStmt(base.Pos, nil)
@@ -323,7 +323,7 @@ func MethodValueWrapper(dot *ir.SelectorExpr) *ir.Func {
 		body = append(body, call)
 	}
 
-	fn.Body.Set(body)
+	fn.Body = body
 	FinishFuncBody()
 
 	Func(fn)
@@ -798,7 +798,7 @@ func tcMake(n *ir.CallExpr) ir.Node {
 		return n
 	}
 
-	n.Args.Set(nil)
+	n.Args = nil
 	l := args[0]
 	l = typecheck(l, ctxType)
 	t := l.Type()
diff --git a/src/cmd/compile/internal/typecheck/iimport.go b/src/cmd/compile/internal/typecheck/iimport.go
index 00ecd9b819..0caac362e3 100644
--- a/src/cmd/compile/internal/typecheck/iimport.go
+++ b/src/cmd/compile/internal/typecheck/iimport.go
@@ -779,7 +779,7 @@ func (r *importReader) caseList(switchExpr ir.Node) []*ir.CaseClause {
 	cases := make([]*ir.CaseClause, r.uint64())
 	for i := range cases {
 		cas := ir.NewCaseStmt(r.pos(), nil, nil)
-		cas.List.Set(r.stmtList())
+		cas.List = r.stmtList()
 		if namedTypeSwitch {
 			// Note: per-case variables will have distinct, dotted
 			// names after import. That's okay: swt.go only needs
@@ -789,7 +789,7 @@ func (r *importReader) caseList(switchExpr ir.Node) []*ir.CaseClause {
 			cas.Var = caseVar
 			caseVar.Defn = switchExpr
 		}
-		cas.Body.Set(r.stmtList())
+		cas.Body = r.stmtList()
 		cases[i] = cas
 	}
 	return cases
@@ -932,7 +932,7 @@ func (r *importReader) node() ir.Node {
 
 	case ir.OCOPY, ir.OCOMPLEX, ir.OREAL, ir.OIMAG, ir.OAPPEND, ir.OCAP, ir.OCLOSE, ir.ODELETE, ir.OLEN, ir.OMAKE, ir.ONEW, ir.OPANIC, ir.ORECOVER, ir.OPRINT, ir.OPRINTN:
 		n := builtinCall(r.pos(), op)
-		n.Args.Set(r.exprList())
+		n.Args = r.exprList()
 		if op == ir.OAPPEND {
 			n.IsDDD = r.bool()
 		}
@@ -945,7 +945,7 @@ func (r *importReader) node() ir.Node {
 		pos := r.pos()
 		init := r.stmtList()
 		n := ir.NewCallExpr(pos, ir.OCALL, r.expr(), r.exprList())
-		n.PtrInit().Set(init)
+		*n.PtrInit() = init
 		n.IsDDD = r.bool()
 		return n
 
@@ -1033,14 +1033,14 @@ func (r *importReader) node() ir.Node {
 	case ir.OIF:
 		pos, init := r.pos(), r.stmtList()
 		n := ir.NewIfStmt(pos, r.expr(), r.stmtList(), r.stmtList())
-		n.PtrInit().Set(init)
+		*n.PtrInit() = init
 		return n
 
 	case ir.OFOR:
 		pos, init := r.pos(), r.stmtList()
 		cond, post := r.exprsOrNil()
 		n := ir.NewForStmt(pos, nil, cond, post, r.stmtList())
-		n.PtrInit().Set(init)
+		*n.PtrInit() = init
 		return n
 
 	case ir.ORANGE:
@@ -1052,7 +1052,7 @@ func (r *importReader) node() ir.Node {
 		pos := r.pos()
 		init := r.stmtList()
 		n := ir.NewSelectStmt(pos, r.commList())
-		n.PtrInit().Set(init)
+		*n.PtrInit() = init
 		return n
 
 	case ir.OSWITCH:
@@ -1060,7 +1060,7 @@ func (r *importReader) node() ir.Node {
 		init := r.stmtList()
 		x, _ := r.exprsOrNil()
 		n := ir.NewSwitchStmt(pos, x, r.caseList(x))
-		n.PtrInit().Set(init)
+		*n.PtrInit() = init
 		return n
 
 	// case OCASE:
diff --git a/src/cmd/compile/internal/typecheck/typecheck.go b/src/cmd/compile/internal/typecheck/typecheck.go
index 0ee66df2cf..d0922e8508 100644
--- a/src/cmd/compile/internal/typecheck/typecheck.go
+++ b/src/cmd/compile/internal/typecheck/typecheck.go
@@ -64,7 +64,7 @@ func FuncBody(n *ir.Func) {
 	CheckUnused(n)
 	CheckReturn(n)
 	if base.Errors() > errorsBefore {
-		n.Body.Set(nil) // type errors; do not compile
+		n.Body = nil // type errors; do not compile
 	}
 }
 
@@ -971,9 +971,9 @@ func typecheckargs(n ir.InitNode) {
 
 	switch n := n.(type) {
 	case *ir.CallExpr:
-		n.Args.Set(list)
+		n.Args = list
 	case *ir.ReturnStmt:
-		n.Results.Set(list)
+		n.Results = list
 	}
 
 	n.PtrInit().Append(Stmt(as))
@@ -1687,7 +1687,7 @@ func stringtoruneslit(n *ir.ConvExpr) ir.Node {
 	}
 
 	nn := ir.NewCompLitExpr(base.Pos, ir.OCOMPLIT, ir.TypeNode(n.Type()), nil)
-	nn.List.Set(l)
+	nn.List = l
 	return Expr(nn)
 }
 
diff --git a/src/cmd/compile/internal/walk/assign.go b/src/cmd/compile/internal/walk/assign.go
index 762baa0dd9..7f3e4cc995 100644
--- a/src/cmd/compile/internal/walk/assign.go
+++ b/src/cmd/compile/internal/walk/assign.go
@@ -264,7 +264,7 @@ func walkReturn(n *ir.ReturnStmt) ir.Node {
 		// move function calls out, to make ascompatee's job easier.
 		walkExprListSafe(n.Results, n.PtrInit())
 
-		n.Results.Set(ascompatee(n.Op(), rl, n.Results, n.PtrInit()))
+		n.Results = ascompatee(n.Op(), rl, n.Results, n.PtrInit())
 		return n
 	}
 	walkExprList(n.Results, n.PtrInit())
@@ -281,7 +281,7 @@ func walkReturn(n *ir.ReturnStmt) ir.Node {
 		a := ir.NewAssignStmt(base.Pos, nname, rhs[i])
 		res[i] = convas(a, n.PtrInit())
 	}
-	n.Results.Set(res)
+	n.Results = res
 	return n
 }
 
diff --git a/src/cmd/compile/internal/walk/builtin.go b/src/cmd/compile/internal/walk/builtin.go
index 13837eeffc..a061181e2f 100644
--- a/src/cmd/compile/internal/walk/builtin.go
+++ b/src/cmd/compile/internal/walk/builtin.go
@@ -531,7 +531,7 @@ func walkPrint(nn *ir.CallExpr, init *ir.Nodes) ir.Node {
 			t = append(t, n)
 		}
 		t = append(t, ir.NewString("\n"))
-		nn.Args.Set(t)
+		nn.Args = t
 	}
 
 	// Collapse runs of constant strings.
@@ -551,7 +551,7 @@ func walkPrint(nn *ir.CallExpr, init *ir.Nodes) ir.Node {
 			i++
 		}
 	}
-	nn.Args.Set(t)
+	nn.Args = t
 
 	calls := []ir.Node{mkcall("printlock", nil, init)}
 	for i, n := range nn.Args {
@@ -653,7 +653,7 @@ func walkPrint(nn *ir.CallExpr, init *ir.Nodes) ir.Node {
 	walkExprList(calls, init)
 
 	r := ir.NewBlockStmt(base.Pos, nil)
-	r.List.Set(calls)
+	r.List = calls
 	return walkStmt(typecheck.Stmt(r))
 }
 
diff --git a/src/cmd/compile/internal/walk/closure.go b/src/cmd/compile/internal/walk/closure.go
index 62d2a362b1..fcdb43f113 100644
--- a/src/cmd/compile/internal/walk/closure.go
+++ b/src/cmd/compile/internal/walk/closure.go
@@ -107,7 +107,7 @@ func Closure(fn *ir.Func) {
 
 		if len(body) > 0 {
 			typecheck.Stmts(body)
-			fn.Enter.Set(body)
+			fn.Enter = body
 			fn.SetNeedctxt(true)
 		}
 	}
@@ -131,7 +131,7 @@ func walkClosure(clo *ir.ClosureExpr, init *ir.Nodes) ir.Node {
 
 	clos := ir.NewCompLitExpr(base.Pos, ir.OCOMPLIT, ir.TypeNode(typ), nil)
 	clos.SetEsc(clo.Esc())
-	clos.List.Set(append([]ir.Node{ir.NewUnaryExpr(base.Pos, ir.OCFUNC, fn.Nname)}, closureArgs(clo)...))
+	clos.List = append([]ir.Node{ir.NewUnaryExpr(base.Pos, ir.OCFUNC, fn.Nname)}, closureArgs(clo)...)
 
 	addr := typecheck.NodAddr(clos)
 	addr.SetEsc(clo.Esc())
diff --git a/src/cmd/compile/internal/walk/expr.go b/src/cmd/compile/internal/walk/expr.go
index 7dfac30094..8a56526a36 100644
--- a/src/cmd/compile/internal/walk/expr.go
+++ b/src/cmd/compile/internal/walk/expr.go
@@ -477,7 +477,7 @@ func walkAddString(n *ir.AddStringExpr, init *ir.Nodes) ir.Node {
 
 	cat := typecheck.LookupRuntime(fn)
 	r := ir.NewCallExpr(base.Pos, ir.OCALL, cat, nil)
-	r.Args.Set(args)
+	r.Args = args
 	r1 := typecheck.Expr(r)
 	r1 = walkExpr(r1, init)
 	r1.SetType(n.Type())
@@ -562,8 +562,8 @@ func walkCall1(n *ir.CallExpr, init *ir.Nodes) {
 		}
 	}
 
-	n.Args.Set(tempAssigns)
-	n.Rargs.Set(args)
+	n.Args = tempAssigns
+	n.Rargs = args
 }
 
 // walkDivMod walks an ODIV or OMOD node.
diff --git a/src/cmd/compile/internal/walk/order.go b/src/cmd/compile/internal/walk/order.go
index 679b795270..767af07414 100644
--- a/src/cmd/compile/internal/walk/order.go
+++ b/src/cmd/compile/internal/walk/order.go
@@ -423,7 +423,7 @@ func orderBlock(n *ir.Nodes, free map[string][]*ir.Name) {
 	order.edge()
 	order.stmtList(*n)
 	order.cleanTemp(mark)
-	n.Set(order.out)
+	*n = order.out
 }
 
 // exprInPlace orders the side effects in *np and
@@ -1233,9 +1233,9 @@ func (o *orderState) expr1(n, lhs ir.Node) ir.Node {
 		// If left-hand side doesn't cause a short-circuit, issue right-hand side.
 		nif := ir.NewIfStmt(base.Pos, r, nil, nil)
 		if n.Op() == ir.OANDAND {
-			nif.Body.Set(gen)
+			nif.Body = gen
 		} else {
-			nif.Else.Set(gen)
+			nif.Else = gen
 		}
 		o.out = append(o.out, nif)
 		return r
@@ -1401,7 +1401,7 @@ func (o *orderState) expr1(n, lhs ir.Node) ir.Node {
 
 			statics = append(statics, r)
 		}
-		n.List.Set(statics)
+		n.List = statics
 
 		if len(dynamics) == 0 {
 			return n
@@ -1448,8 +1448,8 @@ func (o *orderState) as2(n *ir.AssignListStmt) {
 	o.out = append(o.out, n)
 
 	as := ir.NewAssignListStmt(base.Pos, ir.OAS2, nil, nil)
-	as.Lhs.Set(left)
-	as.Rhs.Set(tmplist)
+	as.Lhs = left
+	as.Rhs = tmplist
 	o.stmt(typecheck.Stmt(as))
 }
 
diff --git a/src/cmd/compile/internal/walk/range.go b/src/cmd/compile/internal/walk/range.go
index 3092b71d72..9225c429f0 100644
--- a/src/cmd/compile/internal/walk/range.go
+++ b/src/cmd/compile/internal/walk/range.go
@@ -429,7 +429,7 @@ func arrayClear(loop *ir.RangeStmt, v1, v2, a ir.Node) ir.Node {
 	// 	i = len(a) - 1
 	// }
 	n := ir.NewIfStmt(base.Pos, nil, nil, nil)
-	n.Body.Set(nil)
+	n.Body = nil
 	n.Cond = ir.NewBinaryExpr(base.Pos, ir.ONE, ir.NewUnaryExpr(base.Pos, ir.OLEN, a), ir.NewInt(0))
 
 	// hp = &a[0]
diff --git a/src/cmd/compile/internal/walk/select.go b/src/cmd/compile/internal/walk/select.go
index c6e9b71384..776b020155 100644
--- a/src/cmd/compile/internal/walk/select.go
+++ b/src/cmd/compile/internal/walk/select.go
@@ -22,7 +22,7 @@ func walkSelect(sel *ir.SelectStmt) {
 	init = append(init, walkSelectCases(sel.Cases)...)
 	sel.Cases = nil
 
-	sel.Compiled.Set(init)
+	sel.Compiled = init
 	walkStmtList(sel.Compiled)
 
 	base.Pos = lno
@@ -104,7 +104,7 @@ func walkSelectCases(cases []*ir.CommClause) []ir.Node {
 		n := cas.Comm
 		ir.SetPos(n)
 		r := ir.NewIfStmt(base.Pos, nil, nil, nil)
-		r.PtrInit().Set(cas.Init())
+		*r.PtrInit() = cas.Init()
 		var call ir.Node
 		switch n.Op() {
 		default:
@@ -136,8 +136,8 @@ func walkSelectCases(cases []*ir.CommClause) []ir.Node {
 		}
 
 		r.Cond = typecheck.Expr(call)
-		r.Body.Set(cas.Body)
-		r.Else.Set(append(dflt.Init(), dflt.Body...))
+		r.Body = cas.Body
+		r.Else = append(dflt.Init(), dflt.Body...)
 		return []ir.Node{r, ir.NewBranchStmt(base.Pos, ir.OBREAK, nil)}
 	}
 
diff --git a/src/cmd/compile/internal/walk/stmt.go b/src/cmd/compile/internal/walk/stmt.go
index 3440c66506..460c0a7c10 100644
--- a/src/cmd/compile/internal/walk/stmt.go
+++ b/src/cmd/compile/internal/walk/stmt.go
@@ -61,7 +61,7 @@ func walkStmt(n ir.Node) ir.Node {
 			// copy rewrote to a statement list and a temp for the length.
 			// Throw away the temp to avoid plain values as statements.
 			n = ir.NewBlockStmt(n.Pos(), init)
-			init.Set(nil)
+			init = nil
 		}
 		if len(init) > 0 {
 			switch n.Op() {
@@ -265,7 +265,7 @@ func wrapCall(n *ir.CallExpr, init *ir.Nodes) ir.Node {
 		last := len(n.Args) - 1
 		if va := n.Args[last]; va.Op() == ir.OSLICELIT {
 			va := va.(*ir.CompLitExpr)
-			n.Args.Set(append(n.Args[:last], va.List...))
+			n.Args = append(n.Args[:last], va.List...)
 			n.IsDDD = false
 		}
 	}