[llvm-commits] [llvm] r151710 - /llvm/trunk/docs/LangRef.html

[Nick Lewycky]

Author: nicholas
Date: Wed Feb 29 02:26:44 2012
New Revision: 151710

URL: http://llvm.org/viewvc/llvm-project?rev=151710&view=rev
Log:
Where the alloca'd space actually lives in ram is undefined, and attempting to
pin it down is undefined behaviour.

Modified:
    llvm/trunk/docs/LangRef.html

Modified: llvm/trunk/docs/LangRef.html
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/LangRef.html?rev=151710&r1=151709&r2=151710&view=diff
==============================================================================
--- llvm/trunk/docs/LangRef.html (original)
+++ llvm/trunk/docs/LangRef.html Wed Feb 29 02:26:44 2012
@@ -4859,7 +4859,12 @@
    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>