[NFC] [C++20] [Modules] Refactor Sema::isModuleUnitOfCurrentTU into

Decl::isInAnotherModuleUnit

Refactor `Sema::isModuleUnitOfCurrentTU` to `Decl::isInAnotherModuleUnit`
to make code simpler a little bit. Note that although this patch
introduces a FIXME, this is an existing issue and this patch just tries
to describe it explicitly.

1 files changed, 0 insertions, 13 deletions

diff --git a/clang/lib/Sema/SemaModule.cpp b/clang/lib/Sema/SemaModule.cpp
index a1ab013..67c6556 100644
--- a/clang/lib/Sema/SemaModule.cpp
+++ b/clang/lib/Sema/SemaModule.cpp
@@ -1024,16 +1024,3 @@ void Sema::PopImplicitGlobalModuleFragment() {
          "left the wrong module scope, which is not global module fragment");
   ModuleScopes.pop_back();
 }
-
-bool Sema::isModuleUnitOfCurrentTU(const Module *M) const {
-  assert(M);
-
-  Module *CurrentModuleUnit = getCurrentModule();
-
-  // If we are not in a module currently, M must not be the module unit of
-  // current TU.
-  if (!CurrentModuleUnit)
-    return false;
-
-  return M->isSubModuleOf(CurrentModuleUnit->getTopLevelModule());
-}