document pointer type constraints, PR3513
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64088 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.html b/docs/LangRef.html
index e58d159..dc6d7f2 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -1561,6 +1561,10 @@
an optional address space attribute defining the target-specific numbered
address space where the pointed-to object resides. The default address space is
zero.</p>
+
+<p>Note that LLVM does not permit pointers to void (<tt>void*</tt>) nor does
+it permit pointers to labels (<tt>label*</tt>). Use <tt>i8*</aa> intead.</p>
+
<h5>Syntax:</h5>
<pre> <type> *<br></pre>
<h5>Examples:</h5>