From db751ebd3330bc9a64ce4d9d8f24e30669d91406 Mon Sep 17 00:00:00 2001
From: Fariborz Jahanian <fjahanian@apple.com>
Date: Fri, 16 Jan 2009 00:57:08 +0000
Subject: [PATCH] Implemented code gen for sizeof(objc class interface).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62289 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CGExprScalar.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/CodeGen/CGExprScalar.cpp b/lib/CodeGen/CGExprScalar.cpp
index 4bb5fd1a4f..628bfb0788 100644
--- a/lib/CodeGen/CGExprScalar.cpp
+++ b/lib/CodeGen/CGExprScalar.cpp
@@ -686,7 +686,14 @@ ScalarExprEmitter::VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E) {
     Align /= 8;  // Return alignment in bytes, not bits.
     return llvm::ConstantInt::get(llvm::APInt(ResultWidth, Align));
   }
-  
+  if (TypeToSize->isObjCInterfaceType()) {
+    ObjCInterfaceDecl *OI = TypeToSize->getAsObjCInterfaceType()->getDecl();
+    const RecordDecl *RD = CGF.getContext().addRecordToClass(OI);
+    const Type *Key =
+      CGF.getContext().getTagDeclType(
+                    const_cast<TagDecl*>(dyn_cast<TagDecl>(RD))).getTypePtr();
+    TypeToSize = Key->getDesugaredType();
+  }  
   std::pair<uint64_t, unsigned> Info = CGF.getContext().getTypeInfo(TypeToSize);
   
   uint64_t Val = E->isSizeOf() ? Info.first : Info.second;
-- 
2.50.1