new builtin.c.boot from arm.

node printing fixes.
silence incorrect redeclaration error.

R=ken
OCL=35602
CL=35602

src/cmd/gc/builtin.c.boot

@@ -71,6 +71,8 @@ char *sysimport =
 	"func sys.uint64div (? uint64, ? uint64) (? uint64)\n"
 	"func sys.int64mod (? int64, ? int64) (? int64)\n"
 	"func sys.uint64mod (? uint64, ? uint64) (? uint64)\n"
+	"func sys.float64toint64 (? float64) (? int64)\n"
+	"func sys.int64tofloat64 (? int64) (? float64)\n"
 	"\n"
 	"$$\n";
 char *unsafeimport =

src/cmd/gc/go.y

@@ -188,7 +188,11 @@ import_stmt:
 		if(my->name[0] == '_' && my->name[1] == '\0')
 			break;
 
-		if(my->def) {
+		// Can end up with my->def->op set to ONONAME
+		// if one package refers to p without importing it.
+		// Don't want to give an error on a good import
+		// in another file.
+		if(my->def && my->def->op != ONONAME) {
 			lineno = $1;
 			redeclare(my, "as imported package name");
 		}

src/cmd/gc/print.c

@@ -36,6 +36,35 @@ exprfmt(Fmt *f, Node *n, int prec)
 	case ONONAME:
 	case OPACK:
 	case OLITERAL:
+	case ODOT:
+	case ODOTPTR:
+	case ODOTINTER:
+	case ODOTMETH:
+	case OARRAYBYTESTR:
+	case OCAP:
+	case OCLOSE:
+	case OCLOSED:
+	case OLEN:
+	case OMAKE:
+	case ONEW:
+	case OPANIC:
+	case OPANICN:
+	case OPRINT:
+	case OPRINTN:
+	case OCALL:
+	case OCONV:
+	case OCONVNOP:
+	case OCONVSLICE:
+	case OCONVIFACE:
+	case OMAKESLICE:
+	case ORUNESTR:
+	case OADDR:
+	case OCOM:
+	case OIND:
+	case OMINUS:
+	case ONOT:
+	case OPLUS:
+	case ORECV:
 		nprec = 7;
 		break;
 
@@ -232,6 +261,7 @@ exprfmt(Fmt *f, Node *n, int prec)
 
 	case OINDEX:
 	case OINDEXMAP:
+	case OINDEXSTR:
 		exprfmt(f, n->left, 7);
 		fmtprint(f, "[");
 		exprfmt(f, n->right, 0);
@@ -261,6 +291,11 @@ exprfmt(Fmt *f, Node *n, int prec)
 	case OCONVNOP:
 	case OCONVSLICE:
 	case OCONVIFACE:
+	case OARRAYBYTESTR:
+	case ORUNESTR:
+		if(n->type->sym == S)
+			fmtprint(f, "(%T)(", n->type);
+		else
 			fmtprint(f, "%T(", n->type);
 		exprfmt(f, n->left, 0);
 		fmtprint(f, ")");
@@ -283,6 +318,16 @@ exprfmt(Fmt *f, Node *n, int prec)
 			exprlistfmt(f, n->list);
 		fmtprint(f, ")");
 		break;
+
+	case OMAKESLICE:
+		fmtprint(f, "make(%#T, ", n->type);
+		exprfmt(f, n->left, 0);
+		if(count(n->list) > 2) {
+			fmtprint(f, ", ");
+			exprfmt(f, n->right, 0);
+		}
+		fmtprint(f, ")");
+		break;
 	}
 
 	if(prec > nprec)