From d3435f85b491180a0d219521d16689c058664016 Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Wed, 29 Feb 2012 08:26:44 +0000
Subject: [PATCH] Where the alloca'd space actually lives in ram is undefined,
 and attempting to pin it down is undefined behaviour.

llvm-svn: 151710
---
 docs/LangRef.html | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/docs/LangRef.html b/docs/LangRef.html
index 5d3c7458c2d..29ac260fd0e 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -4859,7 +4859,12 @@ IfUnequal:
    variables that must have an address available.  When the function returns
    (either with the <tt><a href="#i_ret">ret</a></tt>
    or <tt><a href="#i_resume">resume</a></tt> instructions), the memory is
-   reclaimed.  Allocating zero bytes is legal, but the result is undefined.</p>
+   reclaimed.  Allocating zero bytes is legal, but the result is undefined.
+   The order in which memory is allocated (ie., which way the stack grows) is
+   not specified, and relational comparisons involving '<tt>alloca</tt>'s are
+   undefined.</p>
+
+<p>
 
 <h5>Example:</h5>
 <pre>