Disallow null as a named metadata operand.
Make MDNode::destroy private.
Fix the one thing that used MDNode::destroy, outside of MDNode itself.
One should never delete or destroy an MDNode explicitly. MDNodes
implicitly go away when there are no references to them (implementation
details aside).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109028 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.html b/docs/LangRef.html
index 4c635d3..42ae0ae 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -949,15 +949,17 @@
<div class="doc_text">
<p>Named metadata is a collection of metadata. <a href="#metadata">Metadata
- nodes</a> (but not metadata strings) and null are the only valid operands for
+ nodes</a> (but not metadata strings) are the only valid operands for
a named metadata.</p>
<h5>Syntax:</h5>
<pre class="doc_code">
-; An unnamed metadata node, which is referenced by the named metadata.
+; Some unnamed metadata nodes, which are referenced by the named metadata.
+!0 = metadata !{metadata !"zero"}
!1 = metadata !{metadata !"one"}
+!2 = metadata !{metadata !"two"}
; A named metadata.
-!name = !{null, !1}
+!name = !{!0, !1, !2}
</pre>
</div>