Emit an update record if we instantiate the definition of a function template

specialization from a module. (This can also happen for function template
specializations in PCHs if they're instantiated eagerly, because they're
constexpr or have a deduced return type.)

llvm-svn: 204547

1 files changed, 16 insertions, 0 deletions

diff --git a/clang/lib/Serialization/ASTWriterDecl.cpp b/clang/lib/Serialization/ASTWriterDecl.cpp
index 7ee4e31978c..d83b3ede38e 100644
--- a/clang/lib/Serialization/ASTWriterDecl.cpp
+++ b/clang/lib/Serialization/ASTWriterDecl.cpp
@@ -130,6 +130,14 @@ namespace clang {
     void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
     void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
     void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
+
+    void AddFunctionDefinition(const FunctionDecl *FD) {
+      assert(FD->doesThisDeclarationHaveABody());
+      if (auto *CD = dyn_cast<CXXConstructorDecl>(FD))
+        Writer.AddCXXCtorInitializers(CD->CtorInitializers,
+                                      CD->NumCtorInitializers, Record);
+      Writer.AddStmt(FD->getBody());
+    }
   };
 }
 
@@ -1894,3 +1902,11 @@ void ASTWriter::WriteDecl(ASTContext &Context, Decl *D) {
   if (isRequiredDecl(D, Context))
     EagerlyDeserializedDecls.push_back(ID);
 }
+
+void ASTWriter::AddFunctionDefinition(const FunctionDecl *FD,
+                                      RecordData &Record) {
+  ClearSwitchCaseIDs();
+
+  ASTDeclWriter W(*this, FD->getASTContext(), Record);
+  W.AddFunctionDefinition(FD);
+}