From a064156d5de8503d63bba271f1fb5a14c75ca18b Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Tue, 13 Dec 2011 18:05:51 +0100
Subject: [PATCH] PPC: Avoid undefined operand dereference in BAND/shift
 fusion.

---
 src/lj_asm_ppc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lj_asm_ppc.h b/src/lj_asm_ppc.h
index 490ad816..f3f9e2e0 100644
--- a/src/lj_asm_ppc.h
+++ b/src/lj_asm_ppc.h
@@ -1490,7 +1490,7 @@ static void asm_fuseandsh(ASMState *as, PPCIns pi, int32_t mask, IRRef ref)
   IRIns *ir;
   Reg left;
   if (mayfuse(as, ref) && (ir = IR(ref), ra_noreg(ir->r)) &&
-      irref_isk(ir->op2)) {
+      irref_isk(ir->op2) && ir->o >= IR_BSHL && ir->o <= IR_BROR) {
     int32_t sh = (IR(ir->op2)->i & 31);
     switch (ir->o) {
     case IR_BSHL: