[PATCH] D28779: [ASTReader] Add a DeserializationListener callback for IMPORTED_MODULES

[Graydon Hoare via Phabricator via cfe-commits]

graydon created this revision.

Add a callback from ASTReader to DeserializationListener when the former
reads an IMPORTED_MODULES block. This supports Swift in using PCH for
bridging headers.


https://reviews.llvm.org/D28779

Files:
  include/clang/Serialization/ASTDeserializationListener.h
  lib/Serialization/ASTReader.cpp


Index: lib/Serialization/ASTReader.cpp
===================================================================
--- lib/Serialization/ASTReader.cpp
+++ lib/Serialization/ASTReader.cpp
@@ -3245,8 +3245,11 @@
         for (unsigned I = 0, N = Record.size(); I != N; /**/) {
           unsigned GlobalID = getGlobalSubmoduleID(F, Record[I++]);
           SourceLocation Loc = ReadSourceLocation(F, Record, I);
-          if (GlobalID)
+          if (GlobalID) {
             ImportedModules.push_back(ImportedSubmodule(GlobalID, Loc));
+            if (DeserializationListener)
+              DeserializationListener->ModuleImportRead(GlobalID, Loc);
+          }
         }
       }
       break;
Index: include/clang/Serialization/ASTDeserializationListener.h
===================================================================
--- include/clang/Serialization/ASTDeserializationListener.h
+++ include/clang/Serialization/ASTDeserializationListener.h
@@ -26,6 +26,7 @@
 class MacroDefinitionRecord;
 class MacroInfo;
 class Module;
+class SourceLocation;
 
 class ASTDeserializationListener {
 public:
@@ -52,6 +53,9 @@
                                    MacroDefinitionRecord *MD) {}
   /// \brief A module definition was read from the AST file.
   virtual void ModuleRead(serialization::SubmoduleID ID, Module *Mod) {}
+  /// \brief A module import was read from the AST file.
+  virtual void ModuleImportRead(serialization::SubmoduleID ID,
+                                SourceLocation ImportLoc) {}
 };
 }
 


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