clarify that zero sized vectors are illegal, PR8340


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116167 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.html b/docs/LangRef.html
index 704f52b..e5db8c6 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -1910,8 +1910,9 @@
   < <# elements> x <elementtype> >
 </pre>
 
-<p>The number of elements is a constant integer value; elementtype may be any
-   integer or floating point type.</p>
+<p>The number of elements is a constant integer value larger than 0; elementtype
+   may be any integer or floating point type.  Vectors of size zero are not
+   allowed, and pointers are not allowed as the element type.</p>
 
 <h5>Examples:</h5>
 <table class="layout">