add a global variable example


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33190 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.html b/docs/LangRef.html
index 2e40842..bbc0611 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -616,6 +616,13 @@
 global is forced to have at least that much alignment.  All alignments must be
 a power of 2.</p>
 
+<p>For example, the following defines a global with an initializer, section,
+   and alignment:</p>
+
+<pre>
+  %G = constant float 1.0, section "foo", align 4
+</pre>
+
 </div>