[dev.typealias] cmd/compile: change Func.Shortname to *Sym

A Func's Shortname is just an identifier. No need for an entire ONAME
Node.

Change-Id: Ie4d397e8d694c907fdf924ce57bd96bdb4aaabca
Reviewed-on: https://go-review.googlesource.com/35574
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>

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

@@ -1163,14 +1163,14 @@ bad:
 	return nil
 }
 
-func methodname(n, recv *Node) *Node {
+func methodname(s *Sym, recv *Node) *Node {
 	star := false
 	if recv.Op == OIND {
 		star = true
 		recv = recv.Left
 	}
 
-	return methodname0(n.Sym, star, recv.Sym)
+	return methodname0(s, star, recv.Sym)
 }
 
 func methodname0(s *Sym, star bool, tsym *Sym) *Node {
@@ -1318,7 +1318,7 @@ func funcsym(s *Sym) *Sym {
 	s1 := Pkglookup(s.Name+"·f", s.Pkg)
 	if !Ctxt.Flag_dynlink && s1.Def == nil {
 		s1.Def = newfuncname(s1)
-		s1.Def.Func.Shortname = newname(s)
+		s1.Def.Func.Shortname = s
 		funcsyms = append(funcsyms, s1.Def)
 	}
 	s.Fsym = s1
@@ -1336,7 +1336,7 @@ func makefuncsym(s *Sym) {
 	}
 	s1 := funcsym(s)
 	s1.Def = newfuncname(s1)
-	s1.Def.Func.Shortname = newname(s)
+	s1.Def.Func.Shortname = s
 	funcsyms = append(funcsyms, s1.Def)
 }
 

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

@@ -252,7 +252,7 @@ func (p *noder) funcHeader(fun *syntax.FuncDecl) *Node {
 	} else {
 		// Receiver MethodName Signature
 
-		f.Func.Shortname = newfuncname(name)
+		f.Func.Shortname = name
 		f.Func.Nname = methodname(f.Func.Shortname, t.Left.Right)
 	}
 

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

@@ -213,7 +213,7 @@ func dumpglobls() {
 	}
 
 	for _, n := range funcsyms {
-		dsymptr(n.Sym, 0, n.Sym.Def.Func.Shortname.Sym, 0)
+		dsymptr(n.Sym, 0, n.Sym.Def.Func.Shortname, 0)
 		ggloblsym(n.Sym, int32(Widthptr), obj.DUPOK|obj.RODATA)
 	}
 

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

@@ -289,7 +289,7 @@ type Param struct {
 
 // Func holds Node fields used only with function-like nodes.
 type Func struct {
-	Shortname  *Node
+	Shortname  *Sym
 	Enter      Nodes // for example, allocate and initialize memory for escaping parameters
 	Exit       Nodes
 	Cvars      Nodes   // closure params

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

@@ -3436,7 +3436,7 @@ func typecheckfunc(n *Node) {
 	t.SetNname(n.Func.Nname)
 	rcvr := t.Recv()
 	if rcvr != nil && n.Func.Shortname != nil {
-		addmethod(n.Func.Shortname.Sym, t, true, n.Func.Pragma&Nointerface != 0)
+		addmethod(n.Func.Shortname, t, true, n.Func.Pragma&Nointerface != 0)
 	}
 }