diff --git a/clang/test/Driver/aarch64-ite.c b/clang/test/Driver/aarch64-ite.c
new file mode 100644
--- /dev/null
+++ b/clang/test/Driver/aarch64-ite.c
@@ -0,0 +1,17 @@
+// Test that target feature ite is implemented and available correctly
+
+// FEAT_ITE is optional (off by default) for v8.9a/9.4a and older, and can be enabled using +ite
+// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8.8-a       %s 2>&1 | FileCheck %s --check-prefix=NOT_ENABLED
+// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8.8-a+ite   %s 2>&1 | FileCheck %s --check-prefix=ENABLED
+// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8.8-a+noite %s 2>&1 | FileCheck %s --check-prefix=DISABLED
+// RUN: %clang -### -target aarch64-none-none-eabi -march=armv9.3-a       %s 2>&1 | FileCheck %s --check-prefix=NOT_ENABLED
+// RUN: %clang -### -target aarch64-none-none-eabi -march=armv9.3-a+ite   %s 2>&1 | FileCheck %s --check-prefix=ENABLED
+// RUN: %clang -### -target aarch64-none-none-eabi -march=armv9.3-a+noite %s 2>&1 | FileCheck %s --check-prefix=DISABLED
+
+// FEAT_ITE is invalid before v8
+// RUN: %clang -### -target arm-none-none-eabi -march=armv7-a+ite     %s 2>&1 | FileCheck %s --check-prefix=INVALID
+
+// INVALID: error: unsupported argument 'armv7-a+ite' to option '-march='
+// ENABLED: "-target-feature" "+ite"
+// NOT_ENABLED-NOT: "-target-feature" "+ite"
+// DISABLED: "-target-feature" "-ite"
diff --git a/llvm/include/llvm/TargetParser/AArch64TargetParser.h b/llvm/include/llvm/TargetParser/AArch64TargetParser.h
--- a/llvm/include/llvm/TargetParser/AArch64TargetParser.h
+++ b/llvm/include/llvm/TargetParser/AArch64TargetParser.h
@@ -146,6 +146,7 @@
   AEK_LSE128 =      1ULL << 52, // FEAT_LSE128
   AEK_SPECRES2 =    1ULL << 53, // FEAT_SPECRES2
   AEK_RASv2 =       1ULL << 54, // FEAT_RASv2
+  AEK_ITE =         1ULL << 55, // FEAT_ITE
 };
 // clang-format on
 
diff --git a/llvm/include/llvm/TargetParser/AArch64TargetParser.def b/llvm/include/llvm/TargetParser/AArch64TargetParser.def
--- a/llvm/include/llvm/TargetParser/AArch64TargetParser.def
+++ b/llvm/include/llvm/TargetParser/AArch64TargetParser.def
@@ -217,6 +217,7 @@
 AARCH64_ARCH_EXT_NAME("d128", AArch64::AEK_D128, "+d128", "-d128", MAX, "", 0)
 AARCH64_ARCH_EXT_NAME("lse128", AArch64::AEK_LSE128, "+lse128", "-lse128", MAX,
                       "", 0)
+AARCH64_ARCH_EXT_NAME("ite", AArch64::AEK_ITE, "+ite", "-ite", MAX, "", 0)
 AARCH64_ARCH_EXT_NAME("sha1", AArch64::AEK_NONE, {}, {}, SHA1,
                       "+fp-armv8,+neon", 120)
 AARCH64_ARCH_EXT_NAME("pmull", AArch64::AEK_NONE, {}, {}, PMULL,
diff --git a/llvm/unittests/TargetParser/TargetParserTest.cpp b/llvm/unittests/TargetParser/TargetParserTest.cpp
--- a/llvm/unittests/TargetParser/TargetParserTest.cpp
+++ b/llvm/unittests/TargetParser/TargetParserTest.cpp
@@ -1610,6 +1610,7 @@
       AArch64::AEK_B16B16,  AArch64::AEK_SMEF16F16, AArch64::AEK_CSSC,
       AArch64::AEK_RCPC3,   AArch64::AEK_THE,       AArch64::AEK_D128,
       AArch64::AEK_LSE128,  AArch64::AEK_SPECRES2,  AArch64::AEK_RASv2,
+      AArch64::AEK_ITE,
   };
 
   std::vector<StringRef> Features;
@@ -1681,6 +1682,7 @@
   EXPECT_TRUE(llvm::is_contained(Features, "+d128"));
   EXPECT_TRUE(llvm::is_contained(Features, "+lse128"));
   EXPECT_TRUE(llvm::is_contained(Features, "+specres2"));
+  EXPECT_TRUE(llvm::is_contained(Features, "+ite"));
 
   // Assuming we listed every extension above, this should produce the same
   // result. (note that AEK_NONE doesn't have a name so it won't be in the