[llvm] [clang] [clang][llvm][fatlto] Avoid cloning modules in FatLTO (PR #72180)

[Paul Kirth via cfe-commits]

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@@ -1861,6 +1861,13 @@ bool CompilerInvocation::ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
     if (Args.hasArg(OPT_funified_lto))
       Opts.PrepareForThinLTO = true;
   }
+  if (Arg *A = Args.getLastArg(options::OPT_ffat_lto_objects,
+                               options::OPT_fno_fat_lto_objects)) {
+    if (!Args.hasArg(OPT_funified_lto))
+      Diags.Report(diag::err_drv_incompatible_options)
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ilovepi wrote:

Thanks for the suggestion. I think the new version handles that now.

https://github.com/llvm/llvm-project/pull/72180