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Document pure/const parameter attributes

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44111 91177308-0d34-0410-b5e6-96231b3b80d8
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Anton Korobeynikov 2007-11-14 10:30:13 +00:00
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@ -813,6 +813,15 @@ a power of 2.</p>
<dt><tt>nest</tt></dt>
<dd>This indicates that the parameter can be excised using the
<a href="#int_trampoline">trampoline intrinsics</a>.</dd>
<dt><tt>pure</tt></dt>
<dd>This function attribute indicates, that the function have no effects
except the return value and its return value depends only on the
arguments and/or global variables.</dd>
<dt><tt>const</tt></dt>
<dd>This function attribute is slightly more stricter version
of <tt>pure</tt> function attribute. <tt>const</tt> functions are not
allowed to read global memory, so such function only examines its arguments
and has no effects except return value.</dd>
</dl>
</div>