From 6568a2218674808570a0de5303eb85894cb661a1 Mon Sep 17 00:00:00 2001
From: William Chen <william.chen@futurewei.com>
Date: Mon, 13 Dec 2021 08:59:41 -0800
Subject: [PATCH] Fix ebo for defuse opnd where number of opnds might be less

---
 src/mapleall/maple_be/src/cg/ebo.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mapleall/maple_be/src/cg/ebo.cpp b/src/mapleall/maple_be/src/cg/ebo.cpp
index e51bbe51a8..f1df8b98ae 100644
--- a/src/mapleall/maple_be/src/cg/ebo.cpp
+++ b/src/mapleall/maple_be/src/cg/ebo.cpp
@@ -673,8 +673,8 @@ void Ebo::SimplifyInsn(Insn &insn, bool &insnReplaced, bool opndsConstant,
       /* special case */
       if (insn.GetResultNum() > 0 && ResIsNotDefAndUse(insn)) {
         if ((opndNum == 2) && (insn.GetResultNum() == 1) &&
-            (((opnds[kInsnSecondOpnd] != nullptr) && opnds[kInsnSecondOpnd]->IsConstant()) ||
-             ((opnds[kInsnThirdOpnd] != nullptr) && opnds[kInsnThirdOpnd]->IsConstant()))) {
+            (((kInsnSecondOpnd < opnds.size()) && (opnds[kInsnSecondOpnd] != nullptr) && opnds[kInsnSecondOpnd]->IsConstant()) ||
+             ((kInsnThirdOpnd < opnds.size()) && (opnds[kInsnThirdOpnd] != nullptr) && opnds[kInsnThirdOpnd]->IsConstant()))) {
           insnReplaced = SimplifyConstOperand(insn, opnds, opndInfos);
         }
       }
-- 
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