NULL, unique pointers from malloc(0), and freed pointers are legal values for
noalias attribute parameters/return values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59955 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.html b/docs/LangRef.html
index b469022..7c770cb 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -894,7 +894,9 @@
parameter. The caller is responsible for ensuring that this is the
case. On a function return value, <tt>noalias</tt> additionally indicates
that the pointer does not alias any other pointers visible to the
- caller.</dd>
+ caller. Note that this applies only to pointers that can be used to actually
+ load/store a value: NULL, unique pointers from malloc(0), and freed pointers
+ are considered to not alias anything.</dd>
<dt><tt>nest</tt></dt>
<dd>This indicates that the pointer parameter can be excised using the