diff --git a/llvm/docs/LangRef.rst b/llvm/docs/LangRef.rst
index b122fd352eaf5..941a7bea6cffe 100644
--- a/llvm/docs/LangRef.rst
+++ b/llvm/docs/LangRef.rst
@@ -29557,9 +29557,15 @@ Arguments:
 """"""""""
 
 The ``llvm.objectsize`` intrinsic takes four arguments. The first argument is a
-pointer to or into the ``object``. The second argument determines whether
-``llvm.objectsize`` returns 0 (if true) or -1 (if false) when the object size is
-unknown. The third argument controls how ``llvm.objectsize`` acts when ``null``
+pointer to or into the ``object``.
+
+The second argument determines whether ``llvm.objectsize`` returns the minimum
+(if true) or maximum (if false) object size. The minimum size may be any size
+smaller than or equal to the actual object size (including 0 if unknown). The
+maximum size may be any size greater than or equal to the actual object size
+(including -1 if unknown).
+
+The third argument controls how ``llvm.objectsize`` acts when ``null``
 in address space 0 is used as its pointer argument. If it's ``false``,
 ``llvm.objectsize`` reports 0 bytes available when given ``null``. Otherwise, if
 the ``null`` is in a non-zero address space or if ``true`` is given for the