getLLVMFieldNo can't be called before emitting the base value.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@46576 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CodeGen/CGExprConstant.cpp b/CodeGen/CGExprConstant.cpp
index 070ce1d..d996fd8 100644
--- a/CodeGen/CGExprConstant.cpp
+++ b/CodeGen/CGExprConstant.cpp
@@ -412,12 +412,13 @@
     }
     case Expr::MemberExprClass: {
       MemberExpr* ME = cast<MemberExpr>(E);
-      unsigned FieldNumber = CGM.getTypes().getLLVMFieldNo(ME->getMemberDecl());
       llvm::Constant *Base;
       if (ME->isArrow())
         Base = Visit(ME->getBase());
       else
         Base = EmitLValue(ME->getBase());
+
+      unsigned FieldNumber = CGM.getTypes().getLLVMFieldNo(ME->getMemberDecl());
       llvm::Constant *Zero = llvm::ConstantInt::get(llvm::Type::Int32Ty, 0);
       llvm::Constant *Idx = llvm::ConstantInt::get(llvm::Type::Int32Ty,
                                                    FieldNumber);