fix the feature description

Author: luciechoi

clang/include/clang/Basic/LangOptions.def

@@ -243,7 +243,7 @@ ENUM_LANGOPT(HLSLVersion, HLSLLangStd, 16, HLSL_Unset, NotCompatible, "HLSL Vers
 LANGOPT(HLSLStrictAvailability, 1, 0, NotCompatible,
         "Strict availability diagnostic mode for HLSL built-in functions.")
 LANGOPT(HLSLSpvUseUnknownImageFormat, 1, 0, NotCompatible, "For storage images and texel buffers, sets the default format to 'Unknown' when not specified via the `vk::image_format` attribute. If this option is not used, the format is inferred from the resource's data type.")
-LANGOPT(HLSLSpvEnableMaximalReconvergence, 1, 0, NotCompatible, "Enables maximal reconvergence for SPIR-V codegen. This ensures that all control flow merges at the nearest possible merge point as defined by the Vulkan spec.")
+LANGOPT(HLSLSpvEnableMaximalReconvergence, 1, 0, NotCompatible, "Enables the MaximallyReconvergesKHR execution mode for this module. This ensures that control flow reconverges at well-defined merge points as defined by the Vulkan spec.")
 
 LANGOPT(CUDAIsDevice      , 1, 0, NotCompatible, "compiling for CUDA device")
 LANGOPT(CUDAHostDeviceConstexpr, 1, 1, NotCompatible, "treating unattributed constexpr functions as __host__ __device__")

clang/include/clang/Driver/Options.td

@@ -9604,9 +9604,9 @@ def fhlsl_spv_enable_maximal_reconvergence
     : Flag<["-"], "fspv-enable-maximal-reconvergence">,
       Group<dxc_Group>,
       Visibility<[CC1Option, DXCOption]>,
-      HelpText<"Enables maximal reconvergence for SPIR-V codegen. This ensures "
-               "that all control flow merges at the nearest possible merge point "
-               "as defined by the Vulkan spec.">,
+      HelpText<"Enables the MaximallyReconvergesKHR execution mode for this "
+               "module. This ensures that control flow reconverges at "
+               "well-defined merge points as defined by the Vulkan spec.">,
       MarshallingInfoFlag<LangOpts<"HLSLSpvEnableMaximalReconvergence">>;
 
 def no_wasm_opt : Flag<["--"], "no-wasm-opt">,

clang/test/CodeGenHLSL/vk-features/maximal_reconvergence.hlsl

@@ -14,4 +14,4 @@ void test() {
 // CHECK-ENTRY: define void @test() [[attributeNumber:#[0-9]+]] {
 }
 
-// CHECK-ENTRY: attributes [[attributeNumber]] = {{.*}} "enable-maximal-reconvergence"="true" {{.*}}
+// CHECK-ENTRY: attributes [[attributeNumber]] = {{.*}} "enable-maximal-reconvergence"="true" {{.*}}