[clang] [llvm] [clang] report inlining decisions with -Wattribute-{warning|error} (PR #73552)

[Nick Desaulniers via cfe-commits]

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@@ -93,6 +93,8 @@ def err_fe_backend_error_attr :
 def warn_fe_backend_warning_attr :
   Warning<"call to '%0' declared with 'warning' attribute: %1">, BackendInfo,
   InGroup<BackendWarningAttributes>;
+def note_fe_backend_in : Note<"called by function '%0'">;
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nickdesaulniers wrote:

Where should the diagnostic strings go if not here?

https://github.com/llvm/llvm-project/pull/73552