From ce62bbb8539eaa56c6646da3d445d968dabec99f Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@gmx.de>
Date: Mon, 29 Apr 2013 20:15:40 +0200
Subject: [PATCH] 5c: dont emit conditional integer division instructions

the integer division instructions are emulated with _div()
function patched in by 5l which does not handle conditional
execution. so do not optimize away the branch in that case.
---
 sys/src/cmd/5c/peep.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sys/src/cmd/5c/peep.c b/sys/src/cmd/5c/peep.c
index c7b4c2a30..3d624a93d 100644
--- a/sys/src/cmd/5c/peep.c
+++ b/sys/src/cmd/5c/peep.c
@@ -1354,6 +1354,15 @@ joinsplit(Reg *r, Joininfo *j)
 			j->end = r->s2;
 			return Branch;
 		}
+		switch(r->prog->as){
+		case ADIV:
+		case ADIVU:
+		case AMOD:
+		case AMODU:
+			/* emulated by 5l, doesnt handle conditionals */
+			j->end = r->s1;
+			return Toolong;
+		}
 		if (modifiescpsr(r->prog)) {
 			j->end = r->s1;
 			return Setcond;