[clang] [C++20] [Modules] Introduce -fexperimental-modules-reduced-bmi (PR #85050)

[David Blaikie via cfe-commits]

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@@ -3017,6 +3017,7 @@ defm prebuilt_implicit_modules : BoolFOption<"prebuilt-implicit-modules",
 
 def fmodule_output_EQ : Joined<["-"], "fmodule-output=">,
   Flags<[NoXarchOption]>, Visibility<[ClangOption, CC1Option]>,
+  MarshallingInfoString<FrontendOpts<"ModuleOutputPath">>,
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dwblaikie wrote:

What's the motivation to include this change in this patch? Could it be separated?

https://github.com/llvm/llvm-project/pull/85050