be more polite in public headers

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25036 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/CodeGen/MachineConstantPool.h b/include/llvm/CodeGen/MachineConstantPool.h
index 47148e8dd1118e3698d50fff8d7d68c96c3d1263..c2c3399adb74c08b75153e7991151fb5b6cd8528 100644 (file)
--- a/include/llvm/CodeGen/MachineConstantPool.h
+++ b/include/llvm/CodeGen/MachineConstantPool.h
@@ -23,6 +23,7 @@
 #define LLVM_CODEGEN_MACHINECONSTANTPOOL_H
 
 #include <vector>
+#include <iosfwd>
 
 namespace llvm {