fix a build failure with libc++

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153063 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/PTX/PTXParamManager.h b/lib/Target/PTX/PTXParamManager.h
index 32342f7c2c4051fbbf7295736c0cfa47a4e72521..92e7728b4f8b55153bff9b1c077642b1820933b3 100644 (file)
--- a/lib/Target/PTX/PTXParamManager.h
+++ b/lib/Target/PTX/PTXParamManager.h
@@ -17,6 +17,7 @@
 
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallVector.h"
+#include <string>
 
 namespace llvm {