[Clang][Frontend] Change help text for --offload-host-device

[AntonRydahl]

Summary

I believe the help text for the flag --offload-host-device is wrong. Currently, the help text says "Only compile for the offloading host." but the flag alias with --cuda-compile-host-device which
has the help text "Compile CUDA code for both host and device (default). Has no effect on non-CUDA compilations."

[AntonRydahl]

The tests that failed pass locally on my machine.

[jdoerfert]

In D156641#4547718, @AntonRydahl wrote:

The tests that failed pass locally on my machine.

If the tests are clearly not related to your change, assume they are broken before or flaky.

[AntonRydahl]

Running tests again.

[AntonRydahl]

Rebased on latest commit from main.

clang/include/clang/Driver/Options.td

def offload_new_driver : Flag<["--"], "offload-new-driver">, Flags<[CC1Option]>, Group<f_Group>,
   MarshallingInfoFlag<LangOpts<"OffloadingNewDriver">>, HelpText<"Use the new driver for offloading compilation.">;
 def no_offload_new_driver : Flag<["--"], "no-offload-new-driver">, Flags<[CC1Option]>, Group<f_Group>,
   HelpText<"Don't Use the new driver for offloading compilation.">;
 def offload_device_only : Flag<["--"], "offload-device-only">, Flags<[FlangOption]>,
   HelpText<"Only compile for the offloading device.">;
 def offload_host_only : Flag<["--"], "offload-host-only">, Flags<[FlangOption]>,
   HelpText<"Only compile for the offloading host.">;
 def offload_host_device : Flag<["--"], "offload-host-device">, Flags<[FlangOption]>,
-  HelpText<"Only compile for the offloading host.">;
+  HelpText<"Compile for both the offloading host and device (default).">;
 def cuda_device_only : Flag<["--"], "cuda-device-only">, Alias<offload_device_only>,
   HelpText<"Compile CUDA code for device only">;
 def cuda_host_only : Flag<["--"], "cuda-host-only">, Alias<offload_host_only>,
   HelpText<"Compile CUDA code for host only. Has no effect on non-CUDA compilations.">;
 def cuda_compile_host_device : Flag<["--"], "cuda-compile-host-device">, Alias<offload_host_device>,
   HelpText<"Compile CUDA code for both host and device (default). Has no "
            "effect on non-CUDA compilations.">;
 def fopenmp_new_driver : Flag<["-"], "fopenmp-new-driver">, Flags<[HelpHidden]>,

flang/test/Driver/driver-help-hidden.f90

 ! CHECK-NEXT: -help     Display available options
 ! CHECK-NEXT: -I <dir>               Add directory to the end of the list of include search paths
 ! CHECK-NEXT: -mllvm=<arg>           Alias for -mllvm
 ! CHECK-NEXT: -mllvm <value>         Additional arguments to forward to LLVM's option processing
 ! CHECK-NEXT: -mmlir <value>         Additional arguments to forward to MLIR's option processing
 ! CHECK-NEXT: -module-dir <dir>      Put MODULE files in <dir>
 ! CHECK-NEXT: -nocpp                 Disable predefined and command line preprocessor macros
 ! CHECK-NEXT: --offload-device-only   Only compile for the offloading device.
-! CHECK-NEXT: --offload-host-device   Only compile for the offloading host.
+! CHECK-NEXT: --offload-host-device   Compile for both the offloading host and device (default).
 ! CHECK-NEXT: --offload-host-only     Only compile for the offloading host.
 ! CHECK-NEXT: -o <file> Write output to <file>
 ! CHECK-NEXT: -pedantic              Warn on language extensions
 ! CHECK-NEXT: -print-effective-triple Print the effective target triple
 ! CHECK-NEXT: -print-target-triple    Print the normalized target triple
 ! CHECK-NEXT: -P                     Disable linemarker output in -E mode
 ! CHECK-NEXT: -save-temps=<value>    Save intermediate compilation results.
 ! CHECK-NEXT: -save-temps            Save intermediate compilation results

flang/test/Driver/driver-help.f90

 ! HELP-NEXT: -help                  Display available options
 ! HELP-NEXT: -I <dir>               Add directory to the end of the list of include search paths
 ! HELP-NEXT: -mllvm=<arg>           Alias for -mllvm
 ! HELP-NEXT: -mllvm <value>         Additional arguments to forward to LLVM's option processing
 ! HELP-NEXT: -mmlir <value>         Additional arguments to forward to MLIR's option processing
 ! HELP-NEXT: -module-dir <dir>      Put MODULE files in <dir>
 ! HELP-NEXT: -nocpp                 Disable predefined and command line preprocessor macros
 ! HELP-NEXT: --offload-device-only   Only compile for the offloading device.
-! HELP-NEXT: --offload-host-device   Only compile for the offloading host.
+! HELP-NEXT: --offload-host-device   Compile for both the offloading host and device (default).
 ! HELP-NEXT: --offload-host-only     Only compile for the offloading host.
 ! HELP-NEXT: -o <file>              Write output to <file>
 ! HELP-NEXT: -pedantic              Warn on language extensions
 ! HELP-NEXT: -print-effective-triple Print the effective target triple
 ! HELP-NEXT: -print-target-triple    Print the normalized target triple
 ! HELP-NEXT: -P                     Disable linemarker output in -E mode
 ! HELP-NEXT: -save-temps=<value>    Save intermediate compilation results.
 ! HELP-NEXT: -save-temps            Save intermediate compilation results