Implement Obj-C ivar references to aggregates.

Implement Obj-C lvalue message sends (aggregate returns).

Update several places to emit more precise ErrorUnsupported warnings
  for currently unimplemented Obj-C features (main missing chunks are
  property references, Obj-C exception handling, and the for ... in
  syntax).

llvm-svn: 55234

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
index ddf1421b98e3..3f7b7377523f 100644
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -134,6 +134,13 @@ public:
   Value *VisitObjCSelectorExpr(ObjCSelectorExpr *E);
   Value *VisitObjCProtocolExpr(ObjCProtocolExpr *E);
   Value *VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { return EmitLoadOfLValue(E);}
+  Value *VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) {
+    CGF.ErrorUnsupported(E, "scalar expression (Objective-C property reference)");
+    if (E->getType()->isVoidType())
+      return 0;
+    return llvm::UndefValue::get(CGF.ConvertType(E->getType()));    
+  }
+
   Value *VisitArraySubscriptExpr(ArraySubscriptExpr *E);
   Value *VisitShuffleVectorExpr(ShuffleVectorExpr *E);
   Value *VisitMemberExpr(Expr *E)           { return EmitLoadOfLValue(E); }