<div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">The reason I ask is because 64 bit is 16 byte aligned, but aligning the stack in 32 bit code is inefficient for everything else.<br>
</blockquote><div><br></div><div>Note: you only need to align the stack when a vector is actually stored on it by value. Probably very rare, more rare than you think.</div></div><br>