<div dir="ltr"><div dir="ltr">On Wed, Jul 31, 2019 at 10:29 AM Philip Reames via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p>Looks like I made my point in an accidentally really confusing
way. Let me try again w/Matt's correction in mind.</p>
<p>I want to make sure that the middle end optimizer code is *driven
by the data layout*. I am not trying to express an opinion on how
that data layout is populated (frontend, backedge, black magic,
what have you). I just want to make sure that we don't end with
the middle end having to know that address space "56" has special
meaning beyond what is encoded in the data layout. To say it
differently, I want to make sure that a different frontend
targeting a different backend is not effected by the proposed
changes.</p></div></blockquote><div>Got it. :) Yes, we have no intention of teaching the middle end about these address spaces. The usual rules around addrspacecast should apply.<br></div></div></div>