[ObjC] Add NSValue support for objc_boxed_expressions

Patch extends ObjCBoxedExpr to accept records (structs and unions):

typedef struct __attribute__((objc_boxable)) _Color {
  int r, g, b;
} Color;

Color color;
NSValue *boxedColor = @(color); // [NSValue valueWithBytes:&color objCType:@encode(Color)];

llvm-svn: 240761

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 1a8d616efa8..0d15b17c7ce 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -4621,6 +4621,10 @@ void ASTWriter::WriteDeclUpdatesBlocks(RecordDataImpl &OffsetsRecord) {
       case UPD_DECL_EXPORTED:
         Record.push_back(getSubmoduleID(Update.getModule()));
         break;
+
+      case UPD_ADDED_ATTR_TO_RECORD:
+        WriteAttributes(llvm::makeArrayRef(Update.getAttr()), Record);
+        break;
       }
     }
 
@@ -5769,3 +5773,11 @@ void ASTWriter::RedefinedHiddenDefinition(const NamedDecl *D, Module *M) {
   assert(D->isHidden() && "expected a hidden declaration");
   DeclUpdates[D].push_back(DeclUpdate(UPD_DECL_EXPORTED, M));
 }
+
+void ASTWriter::AddedAttributeToRecord(const Attr *Attr,
+                                       const RecordDecl *Record) {
+  assert(!WritingAST && "Already writing the AST!");
+  if (!Record->isFromASTFile())
+    return;
+  DeclUpdates[Record].push_back(DeclUpdate(UPD_ADDED_ATTR_TO_RECORD, Attr));
+}