diff --git a/Makefile b/Makefile
index e66e12127b68061169a0852483b4bbbafa964c50..b0dad73c298df8d754b668af575d8380a1c5e8bd 100644
--- a/Makefile
+++ b/Makefile
@@ -82,6 +82,10 @@ ast2mpl:
 mplfe: install_patch
 	$(call build_gn, $(GN_OPTIONS), mplfe)
 
+.PHONY: clang2mpl
+clang2mpl: maple
+	(cd tools/clang2mpl; make setup; make; make install)
+
 .PHONY: mplfeUT
 mplfeUT:
 	$(call build_gn, $(GN_OPTIONS) COV_CHECK=1, mplfeUT)
@@ -103,7 +107,7 @@ java-core-def: install
 	$(MAKE) gen-def OPT=$(OPT) DEBUG=$(DEBUG) OPS_ANDROID=$(OPS_ANDROID)
 
 .PHONY: install
-install: maple dex2mpl_install irbuild mplfe
+install: maple dex2mpl_install irbuild mplfe clang2mpl
 	$(shell mkdir -p $(INSTALL_DIR)/ops/linker/; \
 	rsync -a -L $(MRT_ROOT)/maplert/linker/maplelld.so.lds $(INSTALL_DIR)/ops/linker/; \
 	rsync -a -L $(MAPLE_ROOT)/build/java2d8 $(INSTALL_DIR)/bin; \
@@ -111,7 +115,7 @@ install: maple dex2mpl_install irbuild mplfe
 	rsync -a -L $(MAPLE_BIN_DIR)/jbc2mpl $(INSTALL_DIR)/bin/;)
 
 .PHONY: all
-all: install mplfe libcore
+all: install libcore
 
 ifeq ($(OPS_ANDROID),0)
 .PHONY: dex2mpl_install
@@ -129,7 +133,7 @@ setup:
 
 .PHONY: demo
 demo:
-	test/maple_aarch64_with_whirl2mpl.sh test/c_demo printHuawei 1 1
+	test/maple_aarch64_with_clang2mpl.sh test/c_demo printHuawei 1 1
 
 .PHONY: ctorture-ci
 ctorture-ci:
diff --git a/build/jenkins/main.sh b/build/jenkins/main.sh
index bede6475b8066020639a5a51f54fb62e967c69f0..87fe5a879a86f330785cd9dc5f13a78cdf62381c 100755
--- a/build/jenkins/main.sh
+++ b/build/jenkins/main.sh
@@ -13,6 +13,7 @@ function debug_test {
   make
   make irbuild
   make mplfe
+  make clang2mpl
   make irbuild_test
   make c_test
 }
@@ -37,6 +38,7 @@ function release_test {
   make
   make irbuild
   make mplfe
+  make clang2mpl
   make libcore OPT=${opt}
 
   for dir in $sample_list
diff --git a/src/mapleall/maple_driver/defs/phases.def b/src/mapleall/maple_driver/defs/phases.def
index 80aa29bd5acdc406b4ffebb935f5ccc513c32649..cd56a454402a44ee8c7045306852af4689a7945b 100644
--- a/src/mapleall/maple_driver/defs/phases.def
+++ b/src/mapleall/maple_driver/defs/phases.def
@@ -24,31 +24,31 @@ ADD_PHASE("gencheckcast", JAVALANG)
 ADD_PHASE("javaintrnlowering", JAVALANG)
 ADD_PHASE("inline", Options::O2 && Options::useInline)
 // mephase begin
-ADD_PHASE("mecfgbuild", MeOption::optLevel == 2 || JAVALANG)
-ADD_PHASE("bypatheh", JAVALANG && MeOption::optLevel == 2)
-ADD_PHASE("loopcanon", MeOption::optLevel == 2)
-ADD_PHASE("splitcriticaledge", MeOption::optLevel == 2)
-ADD_PHASE("ssatab", MeOption::optLevel == 2 || JAVALANG)
-ADD_PHASE("aliasclass", MeOption::optLevel == 2 || JAVALANG)
-ADD_PHASE("ssa", MeOption::optLevel == 2 || JAVALANG)
-ADD_PHASE("dse", MeOption::optLevel == 2)
+ADD_PHASE("mecfgbuild", MeOption::optLevel >= 2 || JAVALANG)
+ADD_PHASE("bypatheh", JAVALANG && MeOption::optLevel >= 2)
+ADD_PHASE("loopcanon", MeOption::optLevel >= 2)
+ADD_PHASE("splitcriticaledge", MeOption::optLevel >= 2)
+ADD_PHASE("ssatab", MeOption::optLevel >= 2 || JAVALANG)
+ADD_PHASE("aliasclass", MeOption::optLevel >= 2 || JAVALANG)
+ADD_PHASE("ssa", MeOption::optLevel >= 2 || JAVALANG)
+ADD_PHASE("dse", MeOption::optLevel >= 2)
 ADD_PHASE("analyzector", JAVALANG)
-ADD_PHASE("abcopt", JAVALANG && MeOption::optLevel == 2)
-ADD_PHASE("ssadevirt", JAVALANG && MeOption::optLevel == 2)
-ADD_PHASE("hprop", MeOption::optLevel == 2)
-ADD_PHASE("hdse", MeOption::optLevel == 2)
-ADD_PHASE("may2dassign", JAVALANG && MeOption::optLevel == 2)
-ADD_PHASE("condbasednpc", JAVALANG && MeOption::optLevel == 2)
-ADD_PHASE("epre", MeOption::optLevel == 2)
-ADD_PHASE("stmtpre", JAVALANG && MeOption::optLevel == 2)
-ADD_PHASE("analyzerc", JAVALANG && MeOption::optLevel == 2)
+ADD_PHASE("abcopt", JAVALANG && MeOption::optLevel >= 2)
+ADD_PHASE("ssadevirt", JAVALANG && MeOption::optLevel >= 2)
+ADD_PHASE("hprop", MeOption::optLevel >= 2)
+ADD_PHASE("hdse", MeOption::optLevel >= 2)
+ADD_PHASE("may2dassign", JAVALANG && MeOption::optLevel >= 2)
+ADD_PHASE("condbasednpc", JAVALANG && MeOption::optLevel >= 2)
+ADD_PHASE("epre", MeOption::optLevel >= 2)
+ADD_PHASE("stmtpre", JAVALANG && MeOption::optLevel >= 2)
+ADD_PHASE("analyzerc", JAVALANG && MeOption::optLevel >= 2)
 ADD_PHASE("rclowering", JAVALANG)
-ADD_PHASE("rename2preg", MeOption::optLevel == 2)
-ADD_PHASE("lpre", MeOption::optLevel == 2)
-ADD_PHASE("storepre", MeOption::optLevel == 2)
-ADD_PHASE("pregrename", MeOption::optLevel == 2)
-ADD_PHASE("bblayout", MeOption::optLevel == 2 || JAVALANG)
-ADD_PHASE("emit", MeOption::optLevel == 2 || JAVALANG)
+ADD_PHASE("rename2preg", MeOption::optLevel >= 2)
+ADD_PHASE("lpre", MeOption::optLevel >= 2)
+ADD_PHASE("storepre", MeOption::optLevel >= 2)
+ADD_PHASE("pregrename", MeOption::optLevel >= 2)
+ADD_PHASE("bblayout", MeOption::optLevel >= 2 || JAVALANG)
+ADD_PHASE("emit", MeOption::optLevel >= 2 || JAVALANG)
 ADD_PHASE("meverify", JAVALANG && MeOption::meVerify)
 // mephase end
 ADD_PHASE("clinit", JAVALANG)
diff --git a/src/mapleall/maple_driver/src/driver_runner.cpp b/src/mapleall/maple_driver/src/driver_runner.cpp
index e37bebdea3415040ffd1f660bf0399d9edeb008c..749b71116779aabb9ae6e290f72a985e9e956637 100644
--- a/src/mapleall/maple_driver/src/driver_runner.cpp
+++ b/src/mapleall/maple_driver/src/driver_runner.cpp
@@ -38,6 +38,7 @@
 using namespace maplebe;
 
 #define JAVALANG (theModule->IsJavaModule())
+#define CLANG (theModule->IsCModule())
 
 #define CHECK_MODULE(errorCode...)                                              \
   do {                                                                          \
diff --git a/src/mapleall/maple_me/src/me_option.cpp b/src/mapleall/maple_me/src/me_option.cpp
index ceb474ab4a51ee295c810907411b56707f92d9b3..5a6ba6507d64b9bfba0b2b585c448fc60e8e0d4f 100644
--- a/src/mapleall/maple_me/src/me_option.cpp
+++ b/src/mapleall/maple_me/src/me_option.cpp
@@ -142,6 +142,7 @@ enum OptionIndex {
   kMeWarnLevel,
   kMeOptL1,
   kMeOptL2,
+  kMeOptL3,
   kRefUsedCheck,
   kMeRange,
   kEpreLimit,
@@ -235,6 +236,15 @@ const Descriptor kUsage[] = {
     "  -O2                         \tDo some optimization.\n",
     "me",
     {} },
+  { kMeOptL3,
+    0,
+    "",
+    "O3",
+    kBuildTypeProduct,
+    kArgCheckPolicyOptional,
+    "  -O3                         \tDo aggressive optimizations.\n",
+    "me",
+    {} },
   { kRefUsedCheck,
     0,
     "",
@@ -1040,6 +1050,8 @@ void MeOption::DecideMeRealLevel(const std::vector<mapleOption::Option> &inputOp
       case kMeOptL2:
         realLevel = kLevelTwo;
         break;
+      case kMeOptL3:
+        realLevel = kLevelThree;
       default:
         break;
     }
@@ -1053,6 +1065,13 @@ void MeOption::DecideMeRealLevel(const std::vector<mapleOption::Option> &inputOp
     placementRC = true;
     subsumRC = true;
     epreIncludeRef = true;
+  } else if (realLevel == kLevelThree) {
+    optLevel = kLevelThree;
+    // turn on as O2
+    optDirectCall = true;
+    placementRC = true;
+    subsumRC = true;
+    epreIncludeRef = true;
   }
 }
 
@@ -1076,6 +1095,8 @@ bool MeOption::SolveOptions(const std::vector<mapleOption::Option> &opts, bool i
       case kMeOptL2:
         // Already handled above in DecideMeRealLevel
         break;
+      case kMeOptL3:
+        break;
       case kRefUsedCheck:
         SplitPhases(opt.Args(), checkRefUsedInFuncs);
         break;
diff --git a/test/Makefile.in b/test/Makefile.in
index 62aec71ce2f75caaab16f230b6d64d8801634581..2f99e3165f9efe05a3c48c7af33cd48855b73d15 100644
--- a/test/Makefile.in
+++ b/test/Makefile.in
@@ -13,7 +13,7 @@
 # See the Mulan PSL v2 for more details.
 #
 
-CCMD := $(MAPLE_ROOT)/test/maple_aarch64_with_whirl2mpl.sh
+CCMD := $(MAPLE_ROOT)/test/maple_aarch64_with_clang2mpl.sh
 
 OPTIMIZE := 0
 
diff --git a/test/c_demo/Makefile b/test/c_demo/Makefile
index 2d89b333af4133e641a372c651e781efce0b9748..82612b52eab37e91794147cdc707e03e68bf3723 100644
--- a/test/c_demo/Makefile
+++ b/test/c_demo/Makefile
@@ -15,4 +15,4 @@
 
 .PHONY: default
 default:
-	../maple_aarch64_with_whirl2mpl.sh . printHuawei 1 1
+	../maple_aarch64_with_clang2mpl.sh . printHuawei 1 1
diff --git a/test/maple_aarch64_with_whirl2mpl.sh b/test/maple_aarch64_with_clang2mpl.sh
similarity index 66%
rename from test/maple_aarch64_with_whirl2mpl.sh
rename to test/maple_aarch64_with_clang2mpl.sh
index 25efdcbb516ebd3bb73b8d95ffdb19b095b6c6db..e40915fbcd5c372bf5fb399114157f3c267a73da 100755
--- a/test/maple_aarch64_with_whirl2mpl.sh
+++ b/test/maple_aarch64_with_clang2mpl.sh
@@ -29,25 +29,19 @@ else
   verbose=$4
 fi
 
-WORKDIR=$MAPLE_BUILD_OUTPUT/$rel/$dir/aarch64_with_whirl2mpl
+WORKDIR=$MAPLE_BUILD_OUTPUT/$rel/$dir/aarch64_with_clang2mpl
 
 mkdir -p $WORKDIR
 cp $dir/$src.c $WORKDIR
 cd $WORKDIR
 
 echo ======================================================================== > cmd.log
-echo ============= Use clangfe/whirl2mpl as C Frontend ======================= >> cmd.log
+echo ==================== use clang2mpl as C Frontend ======================= >> cmd.log
 echo ======================================================================== >> cmd.log
 echo cd $WORKDIR >> cmd.log
 
-V=$(cd /usr/lib/gcc-cross/aarch64-linux-gnu/; ls | head -1)
-FLAGS="-cc1 -emit-llvm -triple aarch64-linux-gnu -D__clang__ -D__BLOCKS__ -isystem /usr/aarch64-linux-gnu/include -isystem /usr/lib/gcc-cross/aarch64-linux-gnu/$V/include"
-echo $MAPLE_ROOT/tools/open64_prebuilt/x86/aarch64/bin/clangfe $FLAGS $src.c >> cmd.log
-$MAPLE_ROOT/tools/open64_prebuilt/x86/aarch64/bin/clangfe $FLAGS $src.c > doit.log 2>&1
-
-echo $MAPLE_ROOT/tools/open64_prebuilt/x86/aarch64/bin/whirl2mpl -a $src.B >> cmd.log
-$MAPLE_ROOT/tools/open64_prebuilt/x86/aarch64/bin/whirl2mpl -a $src.B >> doit.log 2>&1
-
+echo $MAPLE_EXECUTE_BIN/clang2mpl --ascii $src.c -- --target=aarch64-linux-elf >> cmd.log
+$MAPLE_EXECUTE_BIN/clang2mpl --ascii $src.c -- --target=aarch64-linux-elf >> doit.log 2>&1
 
 if [ $opt -eq 0 ]; then
   echo $MAPLE_EXECUTE_BIN/maple --run=mplcg --option=\"-quiet\" $src.mpl >> cmd.log
@@ -57,8 +51,8 @@ else
   $MAPLE_EXECUTE_BIN/maple --run=mplcg --option="-O2 -quiet" $src.mpl >> doit.log 2>&1
 fi
 
-echo /usr/bin/aarch64-linux-gnu-gcc-$V -o $src.out $src.s >> cmd.log
-/usr/bin/aarch64-linux-gnu-gcc-$V -o $src.out $src.s
+echo $MAPLE_ROOT/tools/gcc-linaro-7.5.0/bin/aarch64-linux-gnu-gcc -o $src.out $src.s >> cmd.log
+$MAPLE_ROOT/tools/gcc-linaro-7.5.0/bin/aarch64-linux-gnu-gcc -o $src.out $src.s
 
 echo $MAPLE_ROOT/tools/bin/qemu-aarch64 -L /usr/aarch64-linux-gnu/ $src.out >> cmd.log
 $MAPLE_ROOT/tools/bin/qemu-aarch64 -L /usr/aarch64-linux-gnu/ $src.out > output.log
diff --git a/testsuite/driver/src/api/c_linker.py b/testsuite/driver/src/api/c_linker.py
index 0de13f875892a3a4abefbd5868fdaac142325d38..de319d2dc5376de646a6a8f09ed4dc771a93fdfd 100644
--- a/testsuite/driver/src/api/c_linker.py
+++ b/testsuite/driver/src/api/c_linker.py
@@ -23,5 +23,5 @@ class CLinker(ShellOperator):
         self.outfile = outfile
 
     def get_command(self, variables):
-        self.command = "/usr/bin/aarch64-linux-gnu-gcc -o " + self.outfile + " " + self.infile
+        self.command = "${MAPLE_ROOT}/tools/gcc-linaro-7.5.0/bin/aarch64-linux-gnu-gcc -o " + self.outfile + " " + self.infile
         return super().get_final_command(variables)
diff --git a/testsuite/driver/src/api/clangfe.py b/testsuite/driver/src/api/clang2mpl.py
similarity index 64%
rename from testsuite/driver/src/api/clangfe.py
rename to testsuite/driver/src/api/clang2mpl.py
index 98f7e51dcfd91a42cf90ff7693a2e78e42f30228..dee77c273b4a7d70d836987637d9a805790502ec 100644
--- a/testsuite/driver/src/api/clangfe.py
+++ b/testsuite/driver/src/api/clang2mpl.py
@@ -12,19 +12,18 @@
 # See the Mulan PSL v2 for more details.
 #
 
-import os
-
 from api.shell_operator import ShellOperator
 
 
-class Clangfe(ShellOperator):
-
-    aarch64_linux_gnu_version = os.listdir("/usr/lib/gcc-cross/aarch64-linux-gnu")[0]
+class Clang2mpl(ShellOperator):
 
     def __init__(self, infile, return_value_list=None, redirection=None):
         super().__init__(return_value_list, redirection)
         self.infile = infile
 
     def get_command(self, variables):
-        self.command = "${TOOL_BIN_PATH}/clangfe -cc1 -emit-llvm -triple aarch64-linux-gnu -D__clang__ -D__BLOCKS__ -isystem /usr/aarch64-linux-gnu/include -isystem /usr/lib/gcc-cross/aarch64-linux-gnu/" + str(Clangfe.aarch64_linux_gnu_version) + "/include " + self.infile
+        linaroDir = "${MAPLE_ROOT}/tools/gcc-linaro-7.5.0"
+        isystemFlags = "-isystem " + linaroDir + "/aarch64-linux-gnu/libc/usr/include -isystem " + linaroDir + "/lib/gcc/aarch64-linux-gnu/7.5.0/include"
+        clangFlags = "--target=aarch64-linux-elf -Wno-return-type -U__SIZEOF_INT128__ " + isystemFlags
+        self.command = "${MAPLE_EXECUTE_BIN}/clang2mpl --ascii " + self.infile + " -- " + clangFlags
         return super().get_final_command(variables)
diff --git a/testsuite/driver/src/api/whirl2mpl.py b/testsuite/driver/src/api/whirl2mpl.py
deleted file mode 100644
index d7a84016e9b6398522e4dc8459bc2a0284cafc2a..0000000000000000000000000000000000000000
--- a/testsuite/driver/src/api/whirl2mpl.py
+++ /dev/null
@@ -1,26 +0,0 @@
-#
-# Copyright (c) [2021] Huawei Technologies Co.,Ltd.All rights reserved.
-#
-# OpenArkCompiler is licensed under Mulan PSL v2.
-# You can use this software according to the terms and conditions of the Mulan PSL v2.
-#
-#     http://license.coscl.org.cn/MulanPSL2
-#
-# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR
-# FIT FOR A PARTICULAR PURPOSE.
-# See the Mulan PSL v2 for more details.
-#
-
-from api.shell_operator import ShellOperator
-
-
-class Whirl2mpl(ShellOperator):
-
-    def __init__(self, infile, return_value_list=None, redirection=None):
-        super().__init__(return_value_list, redirection)
-        self.infile = infile
-
-    def get_command(self, variables):
-        self.command = "${MAPLE_ROOT}/tools/open64_prebuilt/x86/aarch64/bin/whirl2mpl -a " + self.infile
-        return super().get_final_command(variables)
diff --git a/testsuite/driver/src/mode/CO0.py b/testsuite/driver/src/mode/CO0.py
index f79ed7a4679be9e0d0d5e37170abfda766bf3c2e..ce77a51a0a39f64a1c75966927695edc77bd2939 100644
--- a/testsuite/driver/src/mode/CO0.py
+++ b/testsuite/driver/src/mode/CO0.py
@@ -21,12 +21,9 @@ CO0 = {
         )
     ],
     "compile": [
-        Clangfe(
+        Clang2mpl(
             infile="${APP}.c"
         ),
-        Whirl2mpl(
-            infile="${APP}.B"
-        ),
         Maple(
             maple="${OUT_ROOT}/${MAPLE_BUILD_TYPE}/bin/maple",
             run=["mplcg"],
diff --git a/testsuite/driver/src/mode/CO2.py b/testsuite/driver/src/mode/CO2.py
index 066467e765d156a43a0777411cbf93597cde8a3b..1336993828f930f51ca0858cd70106c1944ee762 100644
--- a/testsuite/driver/src/mode/CO2.py
+++ b/testsuite/driver/src/mode/CO2.py
@@ -21,12 +21,9 @@ CO2 = {
         )
     ],
     "compile": [
-        Clangfe(
+        Clang2mpl(
             infile="${APP}.c"
         ),
-        Whirl2mpl(
-            infile="${APP}.B"
-        ),
         Maple(
             maple="${OUT_ROOT}/${MAPLE_BUILD_TYPE}/bin/maple",
             run=["mplcg"],
diff --git a/tools/setup_tools.sh b/tools/setup_tools.sh
index 1f4f6a1b2f37a1f51644299a2117fde92db908ec..d72a7d8cab0b14ebdd1a12e71f1d652718817f18 100755
--- a/tools/setup_tools.sh
+++ b/tools/setup_tools.sh
@@ -147,7 +147,7 @@ version=c3b1120
 if [ ! -f $TOOLS/open64_prebuilt/V_$version ]; then
   cd $TOOLS
   rm -rf open64_prebuilt
-  git clone --depth 2 https://gitee.com/open64ark/open64_prebuilt.git
+  git clone --depth 1 https://gitee.com/open64ark/open64_prebuilt.git
 fi
 if [ ! -f $TOOLS/open64_prebuilt/x86/riscv64/bin/clangfe ]; then
   cd $TOOLS/open64_prebuilt/x86
@@ -160,6 +160,18 @@ if [ ! -f $TOOLS/open64_prebuilt/x86/riscv64/bin/clangfe ]; then
   echo Downloaded open64_prebuilt.
 fi
 
+# clang2mpl
+if [ ! -d $TOOLS/clang2mpl ]; then
+  git clone --depth 1 https://gitee.com/openarkcompiler-incubator/clang2mpl.git
+  echo Installed qemu-aarch64
+fi
+# routinly updated to be compatible with maple
+cd $TOOLS/clang2mpl
+git clean -df
+git checkout .
+git checkout master
+git pull
+
 mkdir -p ${TOOL_BIN_PATH}
 if [ "$OLD_OS" == "1" ]; then
   ln -s -f ${MAPLE_ROOT}/tools/clang+llvm-10.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/clang++ ${TOOL_BIN_PATH}/clang++