Add a note mentioning that uses of the return value of an invoke
must be dominated by the normal label.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72285 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.html b/docs/LangRef.html
index 3f16e38..d6a78c9 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -2383,6 +2383,10 @@
exception. Additionally, this is important for implementation of
'<tt>catch</tt>' clauses in high-level languages that support them.</p>
+<p>It is not valid to reference the return value of an invoke call from
+anywhere not dominated by the normal label, since an unwind does not
+provide a return value.</p>
+
<h5>Example:</h5>
<pre>
%retval = invoke i32 @Test(i32 15) to label %Continue