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This patch provides more information to the `PPCallbacks::InclusionDirective()` hook. We now always pass the suggested module, regardless of whether it was actually imported or not. The extra `bool ModuleImported` parameter then denotes whether the header `#include` will be automatically translated into import the the module. The main change is in `clang/lib/Lex/PPDirectives.cpp`, where we take care to not modify `SuggestedModule` after it's been populated by `LookupHeaderIncludeOrImport()`. We now exclusively use the `SM` (`ModuleToImport`) variable instead, which has been equivalent to `SuggestedModule` until now. This allows us to use the original non-modified `SuggestedModule` for the callback itself. (This patch turns out to be necessary for https://github.com/apple/llvm-project/pull/8011).