From 70c016e79a42607aa3b559df39c84e8169ec846a Mon Sep 17 00:00:00 2001
From: hecunmao <hecunmao@huawei.com>
Date: Thu, 28 Aug 2025 21:42:15 +0800
Subject: [PATCH] Cherry-pick !12654 To 0702

Issue:https://gitee.com/openharmony/arkcompiler_ets_runtime/issues/ICVBFK

Signed-off-by: hecunmao <hecunmao@huawei.com>
Change-Id: Ie22311f13b547e0c290045bdb278effd2e430bf8
---
 ecmascript/compiler/stub_builder.cpp | 45 ++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/ecmascript/compiler/stub_builder.cpp b/ecmascript/compiler/stub_builder.cpp
index de1f495c14..b7afef87b8 100644
--- a/ecmascript/compiler/stub_builder.cpp
+++ b/ecmascript/compiler/stub_builder.cpp
@@ -6822,6 +6822,51 @@ GateRef StubBuilder::StringCompareContents(GateRef glue, GateRef left, GateRef r
     StringInfoGateRef leftStrInfoGate(&leftFlat);
     StringInfoGateRef rightStrInfoGate(&rightFlat);
     DEFVARIABLE(i, VariableType::INT32(), Int32(0));
+    GateRef isBothUtf8 = LogicAndBuilder(env).And(IsUtf8String(leftStrInfoGate.GetString()))
+                                             .And(IsUtf8String(rightStrInfoGate.GetString())).Done();
+    Label bothUtf8(env);
+    Label slowCompare(env);
+    BRANCH_LIKELY(isBothUtf8, &bothUtf8, &slowCompare);
+    Bind(&bothUtf8);
+    {
+        GateRef leftData = GetNormalStringData(glue, leftStrInfoGate);
+        GateRef rightData = GetNormalStringData(glue, rightStrInfoGate);
+        Label utf8LoopHead(env);
+        Label utf8LoopEnd(env);
+        Label utf8LoopBody(env);
+        Jump(&utf8LoopHead);
+        LoopBegin(&utf8LoopHead);
+        {
+            BRANCH(Int32UnsignedLessThan(*i, minLength), &utf8LoopBody, &exit);
+            Bind(&utf8LoopBody);
+            {
+                GateRef leftChar = LoadPrimitive(VariableType::INT8(), leftData, *i);
+                GateRef rightChar = LoadPrimitive(VariableType::INT8(), rightData, *i);
+                Label notEqual(env);
+                BRANCH_NO_WEIGHT(Int8Equal(leftChar, rightChar), &utf8LoopEnd, &notEqual);
+                Bind(&notEqual);
+                {
+                    Label leftIsLess(env);
+                    Label rightIsLess(env);
+                    BRANCH_NO_WEIGHT(Int32LessThan(ZExtInt8ToInt32(leftChar), ZExtInt8ToInt32(rightChar)), &leftIsLess, &rightIsLess);
+                    Bind(&leftIsLess);
+                    {
+                        result = Int32(-1);
+                        Jump(&exit);
+                    }
+                    Bind(&rightIsLess);
+                    {
+                        result = Int32(1);
+                        Jump(&exit);
+                    }
+                }
+            }
+            Bind(&utf8LoopEnd);
+            i = Int32Add(*i, Int32(1));
+            LoopEnd(&utf8LoopHead);
+        }
+    }
+    Bind(&slowCompare);
     Jump(&loopHead);
     LoopBegin(&loopHead);
     {
-- 
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