From 72be5412f4d8ee4502ce170a651e49e37c205950 Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <evgeniy@nspcc.ru>
Date: Fri, 19 Jun 2020 17:28:07 +0300
Subject: [PATCH] compiler: optimize argument reversing

Do not reverse arguments if there is no more than 1.
---
 pkg/compiler/codegen.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkg/compiler/codegen.go b/pkg/compiler/codegen.go
index 8110df9ce..44f26dae9 100644
--- a/pkg/compiler/codegen.go
+++ b/pkg/compiler/codegen.go
@@ -1011,6 +1011,7 @@ func (c *codegen) dropItems(n int) {
 // emitReverse reverses top num items of the stack.
 func (c *codegen) emitReverse(num int) {
 	switch num {
+	case 0, 1:
 	case 2:
 		emit.Opcode(c.prog.BinWriter, opcode.SWAP)
 	case 3: