Map from local decl IDs to global decl IDs when lazily deserializing friend decl chains.

llvm-svn: 189629

clang/lib/Serialization/ASTReaderDecl.cpp

@@ -1186,8 +1186,8 @@ void ASTDeclReader::ReadCXXDefinitionData(
   Reader.ReadUnresolvedSet(F, Data.Conversions, Record, Idx);
   Reader.ReadUnresolvedSet(F, Data.VisibleConversions, Record, Idx);
   assert(Data.Definition && "Data.Definition should be already set!");
-  Data.FirstFriend = Record[Idx++];
-  
+  Data.FirstFriend = ReadDeclID(Record, Idx);
+
   if (Data.IsLambda) {
     typedef LambdaExpr::Capture Capture;
     CXXRecordDecl::LambdaDefinitionData &Lambda
@@ -1339,7 +1339,7 @@ void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
     D->Friend = GetTypeSourceInfo(Record, Idx);
   for (unsigned i = 0; i != D->NumTPLists; ++i)
     D->getTPLists()[i] = Reader.ReadTemplateParameterList(F, Record, Idx);
-  D->NextFriend = Record[Idx++];
+  D->NextFriend = ReadDeclID(Record, Idx);
   D->UnsupportedFriend = (Record[Idx++] != 0);
   D->FriendLoc = ReadSourceLocation(Record, Idx);
 }

clang/test/Modules/Inputs/cxx-decls-imported.h

@@ -0,0 +1,5 @@
+class HasFriends {
+  friend void friend_1(HasFriends);
+  friend void friend_2(HasFriends);
+  void private_thing();
+};

clang/test/Modules/Inputs/dummy.h

@@ -0,0 +1,3 @@
+// This module only exists to make local decl IDs and global decl IDs different.
+
+struct Dummy {} extern *dummy1, *dummy2, *dummy3;

clang/test/Modules/Inputs/module.map

@@ -222,6 +222,10 @@ module diag_pragma {
   header "diag_pragma.h"
 }
 
+module dummy {
+  header "dummy.h"
+}
+
 module builtin {
   header "builtin.h"
   explicit module sub {

clang/test/Modules/cxx-decls.cpp

@@ -3,6 +3,7 @@
 
 // expected-no-diagnostics
 
+@import dummy;
 @import cxx_decls.imported;
 
 void test_delete(int *p) {
@@ -10,3 +11,11 @@ void test_delete(int *p) {
   // ever been explicitly declared in an unimported submodule.
   delete p;
 }
+
+void friend_1(HasFriends s) {
+  s.private_thing();
+}
+void test_friends(HasFriends s) {
+  friend_1(s);
+  friend_2(s);
+}