Xing Xue:  port to IBM XLC++/AIX.

llvm-svn: 188396
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 5d1a701d6def1e4e6ae3d5bce67efd40b07fba16
diff --git a/include/algorithm b/include/algorithm
index adf820f..053b809 100644
--- a/include/algorithm
+++ b/include/algorithm
@@ -628,6 +628,10 @@
 #include <iterator>
 #include <cstddef>
 
+#if defined(__IBMCPP__)
+#include "support/ibm/support.h"
+#endif
+
 #include <__undef_min_max>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)