cmd/compile/internal/gc: make Nod private

Follow up to CL 29134. Generated with gofmt -r 'Nod -> nod', plus
three manual adjustments to the comments in syntax/parser.go

Change-Id: I02920f7ab10c70b6e850457b42d5fe35f1f3821a
Reviewed-on: https://go-review.googlesource.com/29136
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
diff --git a/src/cmd/compile/internal/gc/inl.go b/src/cmd/compile/internal/gc/inl.go
index 6832cdd..6687b1a 100644
--- a/src/cmd/compile/internal/gc/inl.go
+++ b/src/cmd/compile/internal/gc/inl.go
@@ -592,7 +592,7 @@
 		if ln.Op == ONAME {
 			ln.Name.Inlvar = typecheck(inlvar(ln), Erv)
 			if ln.Class == PPARAM || ln.Name.Param.Stackcopy != nil && ln.Name.Param.Stackcopy.Class == PPARAM {
-				ninit.Append(Nod(ODCL, ln.Name.Inlvar, nil))
+				ninit.Append(nod(ODCL, ln.Name.Inlvar, nil))
 			}
 		}
 	}
@@ -610,7 +610,7 @@
 			i++
 		}
 
-		ninit.Append(Nod(ODCL, m, nil))
+		ninit.Append(nod(ODCL, m, nil))
 		retvars = append(retvars, m)
 	}
 
@@ -628,7 +628,7 @@
 		if t == nil {
 			Fatalf("method call unknown receiver type: %+v", n)
 		}
-		as := Nod(OAS, tinlvar(t), n.Left.Left)
+		as := nod(OAS, tinlvar(t), n.Left.Left)
 		if as != nil {
 			as = typecheck(as, Etop)
 			ninit.Append(as)
@@ -673,7 +673,7 @@
 	}
 
 	// assign arguments to the parameters' temp names
-	as := Nod(OAS2, nil, nil)
+	as := nod(OAS2, nil, nil)
 
 	as.Rlist.Set(n.List.Slice())
 	li := 0
@@ -763,15 +763,15 @@
 
 	// turn the variadic args into a slice.
 	if variadic {
-		as = Nod(OAS, vararg, nil)
+		as = nod(OAS, vararg, nil)
 		if varargcount == 0 {
 			as.Right = nodnil()
 			as.Right.Type = varargtype
 		} else {
 			vararrtype := typArray(varargtype.Elem(), int64(varargcount))
-			as.Right = Nod(OCOMPLIT, nil, typenod(vararrtype))
+			as.Right = nod(OCOMPLIT, nil, typenod(vararrtype))
 			as.Right.List.Set(varargs)
-			as.Right = Nod(OSLICE, as.Right, nil)
+			as.Right = nod(OSLICE, as.Right, nil)
 		}
 
 		as = typecheck(as, Etop)
@@ -780,7 +780,7 @@
 
 	// zero the outparams
 	for _, n := range retvars {
-		as = Nod(OAS, n, nil)
+		as = nod(OAS, n, nil)
 		as = typecheck(as, Etop)
 		ninit.Append(as)
 	}
@@ -797,7 +797,7 @@
 
 	body := subst.list(fn.Func.Inl)
 
-	lab := Nod(OLABEL, retlabel, nil)
+	lab := nod(OLABEL, retlabel, nil)
 	lab.Used = true // avoid 'not used' when function doesn't have return
 	body = append(body, lab)
 
@@ -805,7 +805,7 @@
 
 	//dumplist("ninit post", ninit);
 
-	call := Nod(OINLCALL, nil, nil)
+	call := nod(OINLCALL, nil, nil)
 
 	call.Ninit.Set(ninit.Slice())
 	call.Nbody.Set(body)
@@ -940,12 +940,12 @@
 
 	//		dump("Return before substitution", n);
 	case ORETURN:
-		m := Nod(OGOTO, subst.retlabel, nil)
+		m := nod(OGOTO, subst.retlabel, nil)
 
 		m.Ninit.Set(subst.list(n.Ninit))
 
 		if len(subst.retvars) != 0 && n.List.Len() != 0 {
-			as := Nod(OAS2, nil, nil)
+			as := nod(OAS2, nil, nil)
 
 			// Make a shallow copy of retvars.
 			// Otherwise OINLCALL.Rlist will be the same list,
@@ -965,7 +965,7 @@
 		return m
 
 	case OGOTO, OLABEL:
-		m := Nod(OXXX, nil, nil)
+		m := nod(OXXX, nil, nil)
 		*m = *n
 		m.Ninit.Set(nil)
 		p := fmt.Sprintf("%s·%d", n.Left.Sym.Name, inlgen)
@@ -973,7 +973,7 @@
 
 		return m
 	default:
-		m := Nod(OXXX, nil, nil)
+		m := nod(OXXX, nil, nil)
 		*m = *n
 		m.Ninit.Set(nil)