From a9a88f29a0c747511814cabb83c5442915e344c2 Mon Sep 17 00:00:00 2001
From: bal <devnull@localhost>
Date: Wed, 18 Sep 1985 16:27:29 +0000
Subject: [PATCH] bug fixed: last instruction of first block in block fusion
 optimization can be a conditional branch. (bug detected by Ceriel).

---
 util/ego/bo/bo.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/util/ego/bo/bo.c b/util/ego/bo/bo.c
index 693d67ed..bcefd098 100644
--- a/util/ego/bo/bo.c
+++ b/util/ego/bo/bo.c
@@ -192,7 +192,9 @@ STATIC mv_code(b1,b2)
 	l = last_code(b2->b_start,TRUE);
 	DLINK(l,b1->b_start);
 	x = l->l_next;
-	if (INSTR(l) == op_bra) {
+	if (TYPE(l) == OPINSTRLAB) {
+		assert(INSTR(x) == op_lab);
+		assert(INSTRLAB(l) == INSTRLAB(x));
 		rm_line(l,b2);
 	}
 	if (INSTR(x) == op_lab) {