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

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177000 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Sema/Sema.cpp

@@ -616,6 +616,12 @@ void Sema::ActOnEndOfTranslationUnit() {
       << I->first;
   }
 
+  if (LangOpts.CPlusPlus11 &&
+      Diags.getDiagnosticLevel(diag::warn_delegating_ctor_cycle,
+                               SourceLocation())
+        != DiagnosticsEngine::Ignored)
+    CheckDelegatingCtorCycles();
+
   if (TUKind == TU_Module) {
     // If we are building a module, resolve all of the exported declarations
     // now.
@@ -700,12 +706,6 @@ void Sema::ActOnEndOfTranslationUnit() {
 
   }
 
-  if (LangOpts.CPlusPlus11 &&
-      Diags.getDiagnosticLevel(diag::warn_delegating_ctor_cycle,
-                               SourceLocation())
-        != DiagnosticsEngine::Ignored)
-    CheckDelegatingCtorCycles();
-
   // If there were errors, disable 'unused' warnings since they will mostly be
   // noise.
   if (!Diags.hasErrorOccurred()) {

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);