optimization of static initialization

R=rsc
CC=golang-dev
https://golang.org/cl/1677049

src/cmd/gc/go.h

@@ -1016,7 +1016,7 @@ void	walkselect(Node *sel);
 /*
  *	sinit.c
  */
-void	anylit(Node *n, Node *var, NodeList **init);
+void	anylit(int ctxt, Node *n, Node *var, NodeList **init);
 int	gen_as_init(Node *n);
 NodeList*	initfix(NodeList *l);
 int	oaslit(Node *n, NodeList **init);

src/cmd/gc/reflect.c

@@ -617,7 +617,7 @@ typename(Type *t)
 	Sym *s;
 	Node *n;
 
-	if((isptr[t->etype] && t->type == T) || isideal(t))
+	if(t == T || (isptr[t->etype] && t->type == T) || isideal(t))
 		fatal("typename %T", t);
 	s = typesym(t);
 	if(s->def == N) {

src/cmd/gc/walk.c

@@ -813,7 +813,7 @@ walkexpr(Node **np, NodeList **init)
 		goto ret;
 
 	case ODOTTYPE:
-	case ODOTTYPE2:		
+	case ODOTTYPE2:
 		// Build name of function: assertI2E2 etc.
 		strcpy(buf, "assert");
 		p = buf+strlen(buf);
@@ -1081,7 +1081,7 @@ walkexpr(Node **np, NodeList **init)
 		case OMAPLIT:
 		case OSTRUCTLIT:
 			nvar = makenewvar(n->type, init, &nstar);
-			anylit(n->left, nstar, init);
+			anylit(0, n->left, nstar, init);
 			n = nvar;
 			goto ret;
 		}
@@ -1262,7 +1262,7 @@ walkexpr(Node **np, NodeList **init)
 	case OSTRUCTLIT:
 		nvar = nod(OXXX, N, N);
 		tempname(nvar, n->type);
-		anylit(n, nvar, init);
+		anylit(0, n, nvar, init);
 		n = nvar;
 		goto ret;