From 7d5b8195e80e268256ebe9b78ada315739030a63 Mon Sep 17 00:00:00 2001
From: William Chen <william.chen@futurewei.com>
Date: Mon, 11 Jul 2022 15:24:04 -0700
Subject: [PATCH] fix cgpeep to not combine ld/st across already split mem opnd

---
 src/mapleall/maple_be/src/cg/aarch64/aarch64_peep.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/mapleall/maple_be/src/cg/aarch64/aarch64_peep.cpp b/src/mapleall/maple_be/src/cg/aarch64/aarch64_peep.cpp
index ba396d77d4..aa4bda1099 100644
--- a/src/mapleall/maple_be/src/cg/aarch64/aarch64_peep.cpp
+++ b/src/mapleall/maple_be/src/cg/aarch64/aarch64_peep.cpp
@@ -2500,6 +2500,11 @@ std::vector<Insn*> CombineContiLoadAndStorePattern::FindPrevStrLdr(Insn &insn, r
         }
       }
     }
+    /* do not optimize across mem opnd that is already split */
+    if (curInsn->IsLoadStorePair() &&
+        static_cast<RegOperand*>(static_cast<MemOperand*>(curInsn->GetMemOpnd())->GetBaseRegister())->GetRegisterNumber() == R16) {
+      return prevContiInsns;
+    }
     /* check insn that changes the data flow */
     regno_t stackBaseRegNO = cgFunc->UseFP() ? R29 : RSP;
     /* ldr x8, [x21, #8]
-- 
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