Need #include <climit> for CHAR_BIT

llvm-svn: 259254
diff --git a/llvm/lib/IR/AttributeImpl.h b/llvm/lib/IR/AttributeImpl.h
index 3d295e6..baaf109 100644
--- a/llvm/lib/IR/AttributeImpl.h
+++ b/llvm/lib/IR/AttributeImpl.h
@@ -20,6 +20,7 @@
 #include "llvm/IR/Attributes.h"
 #include "llvm/Support/TrailingObjects.h"
 #include <string>
+#include <climits>
 
 namespace llvm {