Index: clang/lib/Driver/ToolChains/Arch/AArch64.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Arch/AArch64.cpp
+++ clang/lib/Driver/ToolChains/Arch/AArch64.cpp
@@ -486,18 +486,6 @@
     }
   }
 
-  // FIXME: these insertions should ideally be automated using default
-  // extensions support from the backend target parser.
-  if (V8Version >= 6 || V9Version >= 1)
-    Features.insert(std::next(Features.begin() + ArchFeatPos),
-                    {"+i8mm", "+bf16"});
-
-  // For Armv8.8-a/Armv9.3-a or later, FEAT_HBC and FEAT_MOPS are enabled by
-  // default.
-  if (V8Version >= 8 || V9Version >= 3)
-    Features.insert(std::next(Features.begin() + ArchFeatPos),
-                    {"+hbc", "+mops"});
-
   if (Arg *A = Args.getLastArg(options::OPT_mno_unaligned_access,
                                options::OPT_munaligned_access)) {
     if (A->getOption().matches(options::OPT_mno_unaligned_access))
Index: clang/test/Driver/aarch64-hbc.c
===================================================================
--- clang/test/Driver/aarch64-hbc.c
+++ clang/test/Driver/aarch64-hbc.c
@@ -1,12 +1,14 @@
 // Test that target feature hbc is implemented and available correctly
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8.7-a+hbc   %s 2>&1 | FileCheck %s
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8.8-a       %s 2>&1 | FileCheck %s
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8.8-a+hbc   %s 2>&1 | FileCheck %s
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8.8-a+nohbc %s 2>&1 | FileCheck %s --check-prefix=NO_HBC
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv9.2-a+hbc   %s 2>&1 | FileCheck %s
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv9.3-a       %s 2>&1 | FileCheck %s
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv9.3-a+hbc   %s 2>&1 | FileCheck %s
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv9.3-a+nohbc %s 2>&1 | FileCheck %s --check-prefix=NO_HBC
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv8.7-a+hbc   %s 2>&1 | FileCheck %s
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv8.8-a       %s 2>&1 | FileCheck %s
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv8.8-a+hbc   %s 2>&1 | FileCheck %s
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv8.8-a+nohbc %s 2>&1 | FileCheck %s --check-prefix=NO_HBC
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv9.2-a+hbc   %s 2>&1 | FileCheck %s
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv9.3-a       %s 2>&1 | FileCheck %s
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv9.3-a+hbc   %s 2>&1 | FileCheck %s
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv9.3-a+nohbc %s 2>&1 | FileCheck %s --check-prefix=NO_HBC
 
-// CHECK: "-target-feature" "+hbc"
-// NO_HBC: "-target-feature" "-hbc"
+// CHECK: "target-features"="{{.*}},+hbc
+// NO_HBC: "target-features"="{{.*}},-hbc
+
+void test() {}
\ No newline at end of file
Index: clang/test/Driver/aarch64-i8mm.c
===================================================================
--- clang/test/Driver/aarch64-i8mm.c
+++ clang/test/Driver/aarch64-i8mm.c
@@ -1,7 +1,11 @@
 // The 8-bit integer matrix multiply extension is a mandatory component of the
 // Armv8.6-A extensions, but is permitted as an optional feature for any
 // implementation of Armv8.2-A to Armv8.5-A (inclusive)
-// RUN: %clang -target aarch64 -march=armv8.5a -### -c %s 2>&1 | FileCheck -check-prefix=NO-I8MM %s
-// RUN: %clang -target aarch64 -march=armv8.5a+i8mm -### -c %s 2>&1 | FileCheck -check-prefix=I8MM %s
-// NO-I8MM-NOT: "-target-feature" "+i8mm"
-// I8MM: "-target-feature" "+i8mm"
+// RUN: %clang -target aarch64 -march=armv8.5a -S -o - -emit-llvm -c %s 2>&1 | FileCheck -check-prefix=NOI8MM %s
+// RUN: %clang -target aarch64 -march=armv8.5a+i8mm -S -o - -emit-llvm -c %s 2>&1 | FileCheck -check-prefix=I8MM %s
+// RUN: %clang -target aarch64 -march=armv8.6a -S -o - -emit-llvm -c %s 2>&1 | FileCheck -check-prefix=I8MM %s
+
+// I8MM: "target-features"="{{.*}},+i8mm
+// NOI8MM-NOT: "target-features"="{{.*}},+i8mm
+
+void test() {}
Index: clang/test/Driver/aarch64-mops.c
===================================================================
--- clang/test/Driver/aarch64-mops.c
+++ clang/test/Driver/aarch64-mops.c
@@ -1,12 +1,14 @@
 // Test that target feature mops is implemented and available correctly
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8.7-a+mops   %s 2>&1 | FileCheck %s
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8.8-a        %s 2>&1 | FileCheck %s
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8.8-a+mops   %s 2>&1 | FileCheck %s
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8.8-a+nomops %s 2>&1 | FileCheck %s --check-prefix=NO_MOPS
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv9.2-a+mops   %s 2>&1 | FileCheck %s
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv9.3-a        %s 2>&1 | FileCheck %s
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv9.3-a+mops   %s 2>&1 | FileCheck %s
-// RUN: %clang -### -target aarch64-none-none-eabi -march=armv9.3-a+nomops %s 2>&1 | FileCheck %s --check-prefix=NO_MOPS
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv8.7-a+mops   %s 2>&1 | FileCheck %s
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv8.8-a        %s 2>&1 | FileCheck %s
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv8.8-a+mops   %s 2>&1 | FileCheck %s
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv8.8-a+nomops %s 2>&1 | FileCheck %s --check-prefix=NO_MOPS
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv9.2-a+mops   %s 2>&1 | FileCheck %s
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv9.3-a        %s 2>&1 | FileCheck %s
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv9.3-a+mops   %s 2>&1 | FileCheck %s
+// RUN: %clang -S -o - -emit-llvm -target aarch64-none-none-eabi -march=armv9.3-a+nomops %s 2>&1 | FileCheck %s --check-prefix=NO_MOPS
 
-// CHECK: "-target-feature" "+mops"
-// NO_MOPS: "-target-feature" "-mops"
+// CHECK: "target-features"="{{.*}},+mops
+// NO_MOPS: "target-features"="{{.*}},-mops
+
+void test() {}
\ No newline at end of file
Index: clang/test/Driver/aarch64-v91a.c
===================================================================
--- clang/test/Driver/aarch64-v91a.c
+++ clang/test/Driver/aarch64-v91a.c
@@ -4,7 +4,7 @@
 // RUN: %clang -target aarch64 -mlittle-endian -march=armv9.1-a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV91A %s
 // RUN: %clang -target aarch64_be -mlittle-endian -march=armv9.1a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV91A %s
 // RUN: %clang -target aarch64_be -mlittle-endian -march=armv9.1-a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV91A %s
-// GENERICV91A: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-cpu" "generic" "-target-feature" "+neon" "-target-feature" "+v9.1a" "-target-feature" "+i8mm" "-target-feature" "+bf16" "-target-feature" "+sve" "-target-feature" "+sve2"
+// GENERICV91A: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-cpu" "generic" "-target-feature" "+neon" "-target-feature" "+v9.1a" "-target-feature" "+sve" "-target-feature" "+sve2"
 
 // RUN: %clang -target aarch64_be -march=armv9.1a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV91A-BE %s
 // RUN: %clang -target aarch64_be -march=armv9.1-a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV91A-BE %s
@@ -12,4 +12,4 @@
 // RUN: %clang -target aarch64 -mbig-endian -march=armv9.1-a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV91A-BE %s
 // RUN: %clang -target aarch64_be -mbig-endian -march=armv9.1a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV91A-BE %s
 // RUN: %clang -target aarch64_be -mbig-endian -march=armv9.1-a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV91A-BE %s
-// GENERICV91A-BE: "-cc1"{{.*}} "-triple" "aarch64_be{{.*}}" "-target-cpu" "generic" "-target-feature" "+neon" "-target-feature" "+v9.1a" "-target-feature" "+i8mm" "-target-feature" "+bf16" "-target-feature" "+sve" "-target-feature" "+sve2"
+// GENERICV91A-BE: "-cc1"{{.*}} "-triple" "aarch64_be{{.*}}" "-target-cpu" "generic" "-target-feature" "+neon" "-target-feature" "+v9.1a" "-target-feature" "+sve" "-target-feature" "+sve2"
Index: clang/test/Driver/aarch64-v92a.c
===================================================================
--- clang/test/Driver/aarch64-v92a.c
+++ clang/test/Driver/aarch64-v92a.c
@@ -4,7 +4,7 @@
 // RUN: %clang -target aarch64 -mlittle-endian -march=armv9.2-a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV92A %s
 // RUN: %clang -target aarch64_be -mlittle-endian -march=armv9.2a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV92A %s
 // RUN: %clang -target aarch64_be -mlittle-endian -march=armv9.2-a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV92A %s
-// GENERICV92A: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-cpu" "generic" "-target-feature" "+neon" "-target-feature" "+v9.2a" "-target-feature" "+i8mm" "-target-feature" "+bf16" "-target-feature" "+sve" "-target-feature" "+sve2"
+// GENERICV92A: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-cpu" "generic" "-target-feature" "+neon" "-target-feature" "+v9.2a" "-target-feature" "+sve" "-target-feature" "+sve2"
 
 // RUN: %clang -target aarch64_be -march=armv9.2a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV92A-BE %s
 // RUN: %clang -target aarch64_be -march=armv9.2-a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV92A-BE %s
@@ -12,4 +12,4 @@
 // RUN: %clang -target aarch64 -mbig-endian -march=armv9.2-a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV92A-BE %s
 // RUN: %clang -target aarch64_be -mbig-endian -march=armv9.2a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV92A-BE %s
 // RUN: %clang -target aarch64_be -mbig-endian -march=armv9.2-a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV92A-BE %s
-// GENERICV92A-BE: "-cc1"{{.*}} "-triple" "aarch64_be{{.*}}" "-target-cpu" "generic" "-target-feature" "+neon" "-target-feature" "+v9.2a" "-target-feature" "+i8mm" "-target-feature" "+bf16" "-target-feature" "+sve" "-target-feature" "+sve2"
+// GENERICV92A-BE: "-cc1"{{.*}} "-triple" "aarch64_be{{.*}}" "-target-cpu" "generic" "-target-feature" "+neon" "-target-feature" "+v9.2a" "-target-feature" "+sve" "-target-feature" "+sve2"
Index: llvm/include/llvm/TargetParser/AArch64TargetParser.def
===================================================================
--- llvm/include/llvm/TargetParser/AArch64TargetParser.def
+++ llvm/include/llvm/TargetParser/AArch64TargetParser.def
@@ -57,14 +57,15 @@
               AArch64::AEK_SIMD | AArch64::AEK_RAS | AArch64::AEK_LSE |
               AArch64::AEK_RDM | AArch64::AEK_RCPC | AArch64::AEK_DOTPROD |
               AArch64::AEK_SM4 | AArch64::AEK_SHA3 | AArch64::AEK_BF16 |
-              AArch64::AEK_SHA2 | AArch64::AEK_AES | AArch64::AEK_I8MM))
+              AArch64::AEK_SHA2 | AArch64::AEK_AES | AArch64::AEK_I8MM |
+              AArch64::AEK_MOPS | AArch64::AEK_HBC))
 AARCH64_ARCH("armv8.9-a", ARMV8_9A, "+v8.9a",
              (AArch64::AEK_CRC | AArch64::AEK_FP |
               AArch64::AEK_SIMD | AArch64::AEK_RAS | AArch64::AEK_LSE |
               AArch64::AEK_RDM | AArch64::AEK_RCPC | AArch64::AEK_DOTPROD |
               AArch64::AEK_SM4 | AArch64::AEK_SHA3 | AArch64::AEK_BF16 |
               AArch64::AEK_SHA2 | AArch64::AEK_AES | AArch64::AEK_I8MM |
-              AArch64::AEK_RASv2))
+              AArch64::AEK_MOPS | AArch64::AEK_HBC | AArch64::AEK_RASv2))
 AARCH64_ARCH("armv9-a",   ARMV9A, "+v9a",
              (AArch64::AEK_CRC | AArch64::AEK_FP |
               AArch64::AEK_SIMD | AArch64::AEK_RAS | AArch64::AEK_LSE |
@@ -87,13 +88,14 @@
               AArch64::AEK_SIMD | AArch64::AEK_RAS | AArch64::AEK_LSE |
               AArch64::AEK_RDM | AArch64::AEK_RCPC | AArch64::AEK_DOTPROD |
               AArch64::AEK_BF16 | AArch64::AEK_I8MM | AArch64::AEK_SVE |
-              AArch64::AEK_SVE2))
+              AArch64::AEK_SVE2 | AArch64::AEK_MOPS | AArch64::AEK_HBC))
 AARCH64_ARCH("armv9.4-a", ARMV9_4A, "+v9.4a",
              (AArch64::AEK_CRC | AArch64::AEK_FP |
               AArch64::AEK_SIMD | AArch64::AEK_RAS | AArch64::AEK_LSE |
               AArch64::AEK_RDM | AArch64::AEK_RCPC | AArch64::AEK_DOTPROD |
               AArch64::AEK_BF16 | AArch64::AEK_I8MM | AArch64::AEK_SVE |
-              AArch64::AEK_SVE2 | AArch64::AEK_RASv2))
+              AArch64::AEK_SVE2 | AArch64::AEK_MOPS | AArch64::AEK_HBC |
+              AArch64::AEK_RASv2))
 // For v8-R, we do not enable crypto and align with GCC that enables a more
 // minimal set of optional architecture extensions.
 AARCH64_ARCH("armv8-r", ARMV8R, "+v8r",