PR33746: Store the 'inline'ness of a static data member with the update record

for instantiating its definition.

We model the 'inline'ness as being instantiated with the static data member in
order to track whether the declaration has become a definition yet.

llvm-svn: 317147

clang/lib/Serialization/ASTReaderDecl.cpp

@@ -3988,6 +3988,8 @@ void ASTDeclReader::UpdateDecl(Decl *D,
       VarDecl *VD = cast<VarDecl>(D);
       VD->getMemberSpecializationInfo()->setPointOfInstantiation(
           ReadSourceLocation());
+      VD->NonParmVarDeclBits.IsInline = Record.readInt();
+      VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
       uint64_t Val = Record.readInt();
       if (Val && !VD->getInit()) {
         VD->setInit(Record.readExpr());

clang/lib/Serialization/ASTWriter.cpp

@@ -5084,6 +5084,8 @@ void ASTWriter::WriteDeclUpdatesBlocks(RecordDataImpl &OffsetsRecord) {
       case UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER: {
         const VarDecl *VD = cast<VarDecl>(D);
         Record.AddSourceLocation(Update.getLoc());
+        Record.push_back(VD->isInline());
+        Record.push_back(VD->isInlineSpecified());
         if (VD->getInit()) {
           Record.push_back(!VD->isInitKnownICE() ? 1
                                                  : (VD->isInitICE() ? 3 : 2));

clang/test/Modules/cxx17-inline-variables.cpp

@@ -0,0 +1,30 @@
+// RUN: %clang_cc1 -std=c++17 -fsyntax-only -fmodules %s
+
+#pragma clang module build a
+module a {}
+#pragma clang module contents
+#pragma clang module begin a
+
+template <class c, c e> struct ak { static constexpr c value = e; };
+ak<bool, true> instantiate_class_definition;
+
+#pragma clang module end /* a */
+#pragma clang module endbuild
+
+
+#pragma clang module build o
+module o {}
+#pragma clang module contents
+#pragma clang module begin o
+#pragma clang module import a
+
+inline int instantiate_var_definition() { return ak<bool, true>::value; }
+
+#pragma clang module end
+#pragma clang module endbuild
+
+
+#pragma clang module import o
+#pragma clang module import a
+
+int main() { return ak<bool, true>::value; }