Fix case where load elimination pass kicks in.


diff --git a/arm64/emit.c b/arm64/emit.c
index 5183a0f..c4159f6 100644
--- a/arm64/emit.c
+++ b/arm64/emit.c
@@ -441,8 +441,8 @@ emitins(Ins *i, E *e)
 			goto Table;
 		c = &e->fn->con[i->arg[0].val];
 		if (c->type != CAddr
-		|| c->sym.type != SGlo
-		|| c->bits.i)
+		|| (c->sym.type != SGlo && c->sym.type != SExt)
+        || c->bits.i)
 			die("invalid call argument %d, %d, %d", c->type, c->sym.type, c->bits.i);
 		l = str(c->sym.id);
 		p = l[0] == '"' ? "" : T.assym;