Include header file <functional>.

This is a follow-up to r239325.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239329 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/CodeGen/Passes.h b/include/llvm/CodeGen/Passes.h
index 6bcfa0f56bde2e717205185531b36b846dd0298f..9c7e7b4001a445f00c61681ffee4705ec39932e4 100644 (file)
--- a/include/llvm/CodeGen/Passes.h
+++ b/include/llvm/CodeGen/Passes.h
@@ -17,6 +17,7 @@
 
 #include "llvm/Pass.h"
 #include "llvm/Target/TargetMachine.h"
+#include <functional>
 #include <string>
 
 namespace llvm {