Add header...

llvm-svn: 122247
diff --git a/llvm/lib/Target/X86/X86.h b/llvm/lib/Target/X86/X86.h
index 210d026..0ca4366 100644
--- a/llvm/lib/Target/X86/X86.h
+++ b/llvm/lib/Target/X86/X86.h
@@ -15,6 +15,7 @@
 #ifndef TARGET_X86_H
 #define TARGET_X86_H
 
+#include "llvm/Support/DataTypes.h"
 #include "llvm/Target/TargetMachine.h"
 
 namespace llvm {