From 44c3b54ab2f84cce59ff20b7419b35bbd76dda25 Mon Sep 17 00:00:00 2001
From: William Chen <william.chen@futurewei.com>
Date: Mon, 11 Jul 2022 11:21:52 -0700
Subject: [PATCH] Not propagating x16 which should be used as temp.

---
 src/mapleall/maple_be/src/cg/aarch64/aarch64_global.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/mapleall/maple_be/src/cg/aarch64/aarch64_global.cpp b/src/mapleall/maple_be/src/cg/aarch64/aarch64_global.cpp
index cb198c6b06..7f9df1e093 100644
--- a/src/mapleall/maple_be/src/cg/aarch64/aarch64_global.cpp
+++ b/src/mapleall/maple_be/src/cg/aarch64/aarch64_global.cpp
@@ -2212,6 +2212,9 @@ bool SameRHSPropPattern::CheckCondition(Insn &insn) {
     return false;
   }
   CHECK_FATAL(prevInsn->GetOperand(kInsnFirstOpnd).IsRegister(), "prevInsn first operand must be register");
+  if (static_cast<RegOperand&>(prevInsn->GetOperand(kInsnFirstOpnd)).GetRegisterNumber() == R16) {
+    return false;
+  }
   if (prevInsn->GetOperand(kInsnSecondOpnd).IsRegister() &&
       RegOperand::IsSameReg(prevInsn->GetOperand(kInsnFirstOpnd), prevInsn->GetOperand(kInsnSecondOpnd))) {
     return false;
-- 
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