Codegen. support for ObjCIsaExpr AST which until now

was not needed (fixes radar 7453430).



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90981 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/CodeGen/CGExprScalar.cpp b/lib/CodeGen/CGExprScalar.cpp
index f19aa273d9..9ac8b4d8b3 100644
--- a/lib/CodeGen/CGExprScalar.cpp
+++ b/lib/CodeGen/CGExprScalar.cpp
@@ -167,6 +167,25 @@ public:
     return CGF.EmitObjCMessageExpr(E).getScalarVal();
   }
 
+  Value *VisitObjCIsaExpr(ObjCIsaExpr *E) {
+    Value *V;
+    // object->isa or (*object).isa
+    // Generate code as for: *(Class*)object
+    Expr *BaseExpr = E->getBase();
+    if (E->isArrow())
+      V  = EmitLoadOfLValue(BaseExpr);
+    else
+      V  = EmitLValue(BaseExpr).getAddress();
+    
+    // build Class* type
+    const llvm::Type *ClassPtrTy = ConvertType(E->getType());
+    ClassPtrTy = ClassPtrTy->getPointerTo();
+    V = Builder.CreateBitCast(V, ClassPtrTy);
+    LValue LV = LValue::MakeAddr(V, CGF.MakeQualifiers(E->getType()));
+    V = CGF.EmitLoadOfLValue(LV, E->getType()).getScalarVal();
+    return V;
+  }
+
   Value *VisitArraySubscriptExpr(ArraySubscriptExpr *E);
   Value *VisitShuffleVectorExpr(ShuffleVectorExpr *E);
   Value *VisitMemberExpr(MemberExpr *E);