Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -295,6 +295,18 @@
                ImpliedByAnyOf<disablers, "true">;
 }
 
+// Creates a positive and negative flags where both of them are prefixed with
+// "m", have help text specified for enabled and disabled option, and a Group
+// optionally specified by the OptGroup argument, otherwise Group<m_Group>.
+multiclass SimpleMFlag<string name,
+                       string HelpStringEnabled, string HelpStringDisabled,
+                       OptionGroup OptGroup = m_Group> {
+  def m#NAME : Flag<["-"], "m"#name>, Group<OptGroup>,
+    HelpText<HelpStringEnabled>;
+  def mno_#NAME : Flag<["-"], "mno-"#name>, Group<OptGroup>,
+    HelpText<HelpStringDisabled>;
+}
+
 //===----------------------------------------------------------------------===//
 // BoolOption
 //===----------------------------------------------------------------------===//
@@ -3099,23 +3111,20 @@
   HelpText<"Specify code object ABI version. Defaults to 3. (AMDGPU only)">,
   MetaVarName<"<version>">, Values<"2,3,4">;
 
-def mcode_object_v3_legacy : Flag<["-"], "mcode-object-v3">, Group<m_Group>,
-  HelpText<"Legacy option to specify code object ABI V2 (-mnocode-object-v3) or V3 (-mcode-object-v3) (AMDGPU only)">;
-def mno_code_object_v3_legacy : Flag<["-"], "mno-code-object-v3">, Group<m_Group>;
-
-def mcumode : Flag<["-"], "mcumode">, Group<m_amdgpu_Features_Group>,
-  HelpText<"Specify CU (-mcumode) or WGP (-mno-cumode) wavefront execution mode (AMDGPU only)">;
-def mno_cumode : Flag<["-"], "mno-cumode">, Group<m_amdgpu_Features_Group>;
-
-def mtgsplit : Flag<["-"], "mtgsplit">, Group<m_amdgpu_Features_Group>,
-  HelpText<"Enable threadgroup split execution mode (AMDGPU only)">;
-def mno_tgsplit : Flag<["-"], "mno-tgsplit">, Group<m_amdgpu_Features_Group>,
-  HelpText<"Disable threadgroup split execution mode (AMDGPU only)">;
-
-def mwavefrontsize64 : Flag<["-"], "mwavefrontsize64">, Group<m_Group>,
-  HelpText<"Specify wavefront size 64 mode (AMDGPU only)">;
-def mno_wavefrontsize64 : Flag<["-"], "mno-wavefrontsize64">, Group<m_Group>,
-  HelpText<"Specify wavefront size 32 mode (AMDGPU only)">;
+defm code_object_v3_legacy : SimpleMFlag<"code-object-v3",
+  "Legacy option to specify code object ABI V3 (AMDGPU only)",
+  "Legacy option to specify code object ABI V2 (AMDGPU only)">;
+defm cumode : SimpleMFlag<"cumode",
+  "Specify CU wavefront execution mode (AMDGPU only)",
+  "Specify WGP wavefront execution mode (AMDGPU only)",
+  m_amdgpu_Features_Group>;
+defm tgsplit : SimpleMFlag<"tgsplit",
+  "Elable threadgroup split execution mode (AMDGPU only)",
+  "Disable threadgroup split execution mode (AMDGPU only)",
+  m_amdgpu_Features_Group>;
+defm wavefrontsize64 : SimpleMFlag<"wavefrontsize64",
+  "Specify wavefront size 64 mode (AMDGPU only)",
+  "Specify wavefront size 32 mode (AMDGPU only)">;
 
 defm unsafe_fp_atomics : BoolOption<"m", "unsafe-fp-atomics",
   TargetOpts<"AllowAMDGPUUnsafeFPAtomics">, DefaultFalse,