From c051627849acfe3a8606b11459a4b3f085bd638f Mon Sep 17 00:00:00 2001
From: Takuya Ueda <uedatakuya@gmail.com>
Date: Thu, 18 Mar 2021 17:12:01 +0900
Subject: [PATCH] Fix bug

---
 ssa.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ssa.go b/ssa.go
index 1bf8760..2e22bbe 100644
--- a/ssa.go
+++ b/ssa.go
@@ -59,7 +59,7 @@ func returnsInBlock(b *ssa.BasicBlock, done map[*ssa.BasicBlock]bool) (rets []*s
 	}
 	done[b] = true
 
-	if len(b.Preds) == 0 {
+	if b.Index != 0 && len(b.Preds) == 0 {
 		return nil
 	}