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Where the alloca'd space actually lives in ram is undefined, and attempting to

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pin it down is undefined behaviour.

llvm-svn: 151710
This commit is contained in:
Nick Lewycky 2012-02-29 08:26:44 +00:00
parent e9705e2949
commit d3435f85b4
1 changed files with 6 additions and 1 deletions
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7
docs/LangRef.html
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@ -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>