1 files changed, 16 insertions, 0 deletions
diff --git a/include/clang/Lex/Preprocessor.h b/include/clang/Lex/Preprocessor.h
index bba0c38..b2f58ead 100644
--- a/include/clang/Lex/Preprocessor.h
+++ b/include/clang/Lex/Preprocessor.h
@@ -786,6 +786,22 @@ public:
            (!getLangOpts().Modules || (bool)getMacroDefinition(II));
   }
 
+  /// \brief Determine whether II is defined as a macro within the module M,
+  /// if that is a module that we've already preprocessed. Does not check for
+  /// macros imported into M.
+  bool isMacroDefinedInLocalModule(const IdentifierInfo *II, Module *M) {
+    if (!II->hasMacroDefinition())
+      return false;
+    auto I = Submodules.find(M);
+    if (I == Submodules.end())
+      return false;
+    auto J = I->second.Macros.find(II);
+    if (J == I->second.Macros.end())
+      return false;
+    auto *MD = J->second.getLatest();
+    return MD && MD->isDefined();
+  }
+
   MacroDefinition getMacroDefinition(const IdentifierInfo *II) {
     if (!II->hasMacroDefinition())
       return MacroDefinition();