[modules] Check for delegating constructor cycles when building a module and don't write them out to the module file.

llvm-svn: 177000

1 files changed, 6 insertions, 3 deletions

diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 088e7a3f2cf..58a196d9a1a 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -3464,6 +3464,8 @@ void ASTWriter::WriteASTCore(Sema &SemaRef,
                              Module *WritingModule) {
   using namespace llvm;
 
+  bool isModule = WritingModule != 0;
+
   // Make sure that the AST reader knows to finalize itself.
   if (Chain)
     Chain->finalizeForWriting();
@@ -3535,7 +3537,8 @@ void ASTWriter::WriteASTCore(Sema &SemaRef,
   // Build a record containing all of the delegating constructors we still need
   // to resolve.
   RecordData DelegatingCtorDecls;
-  AddLazyVectorDecls(*this, SemaRef.DelegatingCtorDecls, DelegatingCtorDecls);
+  if (!isModule)
+    AddLazyVectorDecls(*this, SemaRef.DelegatingCtorDecls, DelegatingCtorDecls);
 
   // Write the set of weak, undeclared identifiers. We always write the
   // entire table, since later PCH files in a PCH chain are only interested in
@@ -3770,11 +3773,11 @@ void ASTWriter::WriteASTCore(Sema &SemaRef,
     Stream.EmitRecordWithBlob(ModuleOffsetMapAbbrev, Record,
                               Buffer.data(), Buffer.size());
   }
-  WritePreprocessor(PP, WritingModule != 0);
+  WritePreprocessor(PP, isModule);
   WriteHeaderSearch(PP.getHeaderSearchInfo(), isysroot);
   WriteSelectors(SemaRef);
   WriteReferencedSelectorsPool(SemaRef);
-  WriteIdentifierTable(PP, SemaRef.IdResolver, WritingModule != 0);
+  WriteIdentifierTable(PP, SemaRef.IdResolver, isModule);
   WriteFPPragmaOptions(SemaRef.getFPOptions());
   WriteOpenCLExtensions(SemaRef);