add a #include to improve portability to windows, as requested by

someone on llvmdev.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66397 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/Assembly/Writer.h b/include/llvm/Assembly/Writer.h
index 34d905399d40623135101c5e6133b7037eed10be..5e5fe1560585da65c631baf6e45ebfcc4c1dcdcb 100644 (file)
--- a/include/llvm/Assembly/Writer.h
+++ b/include/llvm/Assembly/Writer.h
@@ -18,6 +18,7 @@
 #define LLVM_ASSEMBLY_WRITER_H
 
 #include <iosfwd>
+#include <string>
 
 namespace llvm {