<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span style="font-family:arial,sans-serif">On Wed, Feb 8, 2017 at 10:26 AM, Pete Heist </span><span dir="ltr" style="font-family:arial,sans-serif"><<a href="mailto:peteheist@gmail.com" target="_blank">peteheist@gmail.com</a>></span><span style="font-family:arial,sans-serif"> wrote:</span><br></div><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><div><div>Even after the new SSA back end, they can still be large.</div></div></div></blockquote><div><br></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Take if from a long time compiler write who has nearly 30 years experience working with SSA: SSA is no panacea. It is a representation that makes some optimizations easier to express and sometimes more effective. Many of the optimizations that SSA facilitates tend to raise register pressure. I can be a very delicate balancing act.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Optimizing for size is a dark art. Most compiler projects invest relatively little effort in that direction.</div><br></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">/john</div><br></div></div>
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