diff --git a/llvm/include/llvm/TextAPI/MachO/Architecture.def b/llvm/include/llvm/TextAPI/MachO/Architecture.def
--- a/llvm/include/llvm/TextAPI/MachO/Architecture.def
+++ b/llvm/include/llvm/TextAPI/MachO/Architecture.def
@@ -36,3 +36,4 @@
 /// ARM64 architectures sorted by cpu sub type id.
 ///
 ARCHINFO(arm64, MachO::CPU_TYPE_ARM64, MachO::CPU_SUBTYPE_ARM64_ALL)
+ARCHINFO(arm64e, MachO::CPU_TYPE_ARM64, MachO::CPU_SUBTYPE_ARM64E)
diff --git a/llvm/unittests/TextAPI/TextStubV3Tests.cpp b/llvm/unittests/TextAPI/TextStubV3Tests.cpp
--- a/llvm/unittests/TextAPI/TextStubV3Tests.cpp
+++ b/llvm/unittests/TextAPI/TextStubV3Tests.cpp
@@ -408,6 +408,31 @@
             stripWhitespace(Buffer.c_str()));
 }
 
+TEST(TBDv3, Arch_arm64e) {
+  static const char TBDv3ArchArm64e[] = "--- !tapi-tbd-v3\n"
+                                        "archs: [ arm64, arm64e ]\n"
+                                        "platform: ios\n"
+                                        "install-name: Test.dylib\n"
+                                        "...\n";
+
+  auto Result =
+      TextAPIReader::get(MemoryBufferRef(TBDv3ArchArm64e, "Test.tbd"));
+  EXPECT_TRUE(!!Result);
+  auto File = std::move(Result.get());
+  auto Platform = PlatformKind::iOS;
+  auto Archs = AK_arm64 | AK_arm64e;
+  EXPECT_EQ(FileType::TBD_V3, File->getFileType());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
+  EXPECT_EQ(Archs, File->getArchitectures());
+
+  SmallString<4096> Buffer;
+  raw_svector_ostream OS(Buffer);
+  auto WriteResult = TextAPIWriter::writeToStream(OS, *File);
+  EXPECT_TRUE(!WriteResult);
+  EXPECT_EQ(stripWhitespace(TBDv3ArchArm64e), stripWhitespace(Buffer.c_str()));
+}
+
 TEST(TBDv3, Swift_1_0) {
   static const char TBDv3Swift1[] = "--- !tapi-tbd-v3\n"
                                     "archs: [ arm64 ]\n"
diff --git a/llvm/unittests/TextAPI/TextStubV4Tests.cpp b/llvm/unittests/TextAPI/TextStubV4Tests.cpp
--- a/llvm/unittests/TextAPI/TextStubV4Tests.cpp
+++ b/llvm/unittests/TextAPI/TextStubV4Tests.cpp
@@ -375,6 +375,28 @@
             stripWhitespace(Buffer.c_str()));
 }
 
+TEST(TBDv4, Target_arm_iOS) {
+  static const char tbdv4_arm64e[] = "--- !tapi-tbd\n"
+                                     "tbd-version: 4\n"
+                                     "targets: [  arm64e-ios ]\n"
+                                     "install-name: Test.dylib\n"
+                                     "...\n";
+
+  auto Result = TextAPIReader::get(MemoryBufferRef(tbdv4_arm64e, "Test.tbd"));
+  EXPECT_TRUE(!!Result);
+  auto File = std::move(Result.get());
+  EXPECT_EQ(FileType::TBD_V4, File->getFileType());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(PlatformKind::iOS, *File->getPlatforms().begin());
+  EXPECT_EQ(ArchitectureSet(AK_arm64e), File->getArchitectures());
+
+  SmallString<4096> Buffer;
+  raw_svector_ostream OS(Buffer);
+  auto WriteResult = TextAPIWriter::writeToStream(OS, *File);
+  EXPECT_TRUE(!WriteResult);
+  EXPECT_EQ(stripWhitespace(tbdv4_arm64e), stripWhitespace(Buffer.c_str()));
+}
+
 TEST(TBDv4, Target_x86_macos) {
   static const char tbd_x86_macos[] = "--- !tapi-tbd\n"
                                       "tbd-version: 4\n"