From 8df4a03024a0039e9ef5123e8a36f8855e2887d1 Mon Sep 17 00:00:00 2001
From: William Chen <william.chen@futurewei.com>
Date: Tue, 6 Sep 2022 15:50:23 -0700
Subject: [PATCH] ssa preg copy return false if differIdx == -1

---
 src/mapleall/maple_be/src/cg/aarch64/aarch64_prop.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/mapleall/maple_be/src/cg/aarch64/aarch64_prop.cpp b/src/mapleall/maple_be/src/cg/aarch64/aarch64_prop.cpp
index cf65ddf8ef..66f4ebe36c 100644
--- a/src/mapleall/maple_be/src/cg/aarch64/aarch64_prop.cpp
+++ b/src/mapleall/maple_be/src/cg/aarch64/aarch64_prop.cpp
@@ -2508,6 +2508,9 @@ bool A64PregCopyPattern::CheckPhiCaseCondition(Insn &defInsn) {
       return false;
     }
   }
+  if (differIdx == -1) {
+    return false;
+  }
   return true;
 }
 
-- 
Gitee