Handle readwrite constraints correctly

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62043 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGStmt.cpp b/lib/CodeGen/CGStmt.cpp
index 8d80a49..bee40e5 100644
--- a/lib/CodeGen/CGStmt.cpp
+++ b/lib/CodeGen/CGStmt.cpp
@@ -944,9 +944,10 @@
       const Expr *InputExpr = S.getOutputExpr(i);
       llvm::Value *Arg = EmitAsmInput(S, Info, InputExpr, InOutConstraints);
       
+      InOutConstraints += llvm::utostr(Args.size());
+
       InOutArgTypes.push_back(Arg->getType());
       InOutArgs.push_back(Arg);
-      InOutConstraints += OutputConstraint;
     }
   }