<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Jan 31, 2017, at 7:53 PM, Tian, Xinmin <<a href="mailto:xinmin.tian@intel.com" class="">xinmin.tian@intel.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">In this case, inliner is educated to add all local variables to the tag of enclosing parallel region, if there is enclosing parallel region. </span></div></div></div></blockquote><div><br class=""></div><div><br class=""></div><div>So isn’t it a good example that shows that your intrinsic *cannot* be opaque and that IR passes need to be modified to handle not only the IR-region intrinsic but also the specific semantic of the tag?</div><div><br class=""></div><div>It seems to me that this contradicts the claim that the “tag” specific semantic does not need to be handled by the optimizer and that the intrinsic can integrate seamlessly in LLVM, which invalidates the approach (of a generic intrinsic) entirely IMO.</div><div><br class=""></div><div>Maybe you never intended to claim this, but this is a hidden cost in the original RFC, and I suspect this cost has to be carefully evaluated. At this point I’m not sure it is worth discussing anything further without seeing a proper LangRef update.</div><div><br class=""></div><div><span style="color: rgb(31, 73, 125); font-family: Calibri, sans-serif; font-size: 11pt;" class=""> </span></div><blockquote type="cite" class=""><div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">In our icc implementation, it is even simple, as we have routine level symbol table, the inliner adds ”private” attribute to those local variables w/o checking enclosing scope, the parallelizer does check and use it.<span class="Apple-converted-space"> </span></span></div></div></blockquote><div><br class=""></div><div>Again, you’re trying to address a specific case, while I’m just trying to identify a generic class of problem that your proposal fails to address explicitly.</div><div><br class=""></div><div>Best,</div><div><br class=""></div><div>— </div><div>Mehdi</div><div><br class=""></div><div><br class=""></div><div><br class=""></div><div><br class=""></div><blockquote type="cite" class=""><div class=""><div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class=""><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(225, 225, 225); padding: 3pt 0in 0in;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><b class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">From:</span></b><span style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class="Apple-converted-space"> </span><a href="mailto:mehdi.amini@apple.com" class="">mehdi.amini@apple.com</a> [<a href="mailto:mehdi.amini@apple.com" class="">mailto:mehdi.amini@apple.com</a>]<span class="Apple-converted-space"> </span><br class=""><b class="">Sent:</b><span class="Apple-converted-space"> </span>Tuesday, January 31, 2017 7:31 PM<br class=""><b class="">To:</b><span class="Apple-converted-space"> </span>Tian, Xinmin <<a href="mailto:xinmin.tian@intel.com" class="">xinmin.tian@intel.com</a>><br class=""><b class="">Cc:</b><span class="Apple-converted-space"> </span>Sanjoy Das <<a href="mailto:sanjoy@playingwithpointers.com" class="">sanjoy@playingwithpointers.com</a>>; Adve, Vikram Sadanand <<a href="mailto:vadve@illinois.edu" class="">vadve@illinois.edu</a>>; <a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>; <a href="mailto:llvm-dev-request@lists.llvm.org" class="">llvm-dev-request@lists.llvm.org</a><br class=""><b class="">Subject:</b><span class="Apple-converted-space"> </span>Re: [llvm-dev] [RFC] IR-level Region Annotations<o:p class=""></o:p></span></div></div></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div><div class=""><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><br class="">Sent from my iPhone<o:p class=""></o:p></div></div><div class=""><p class="MsoNormal" style="margin: 0in 0in 12pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><br class="">On Jan 31, 2017, at 7:27 PM, Tian, Xinmin <<a href="mailto:xinmin.tian@intel.com" style="color: purple; text-decoration: underline;" class="">xinmin.tian@intel.com</a>> wrote:<o:p class=""></o:p></p></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Remember that, the prepare-phase is invoked in the FE or right after FE, inlining is not happening, that is why we don't call it "pass". Chandler made a good point for this case a long time back. <o:p class=""></o:p></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div></div></blockquote><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">What I was describing is the inlining in the optimizer pipeline.<o:p class=""></o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Hoisting alloca is totally ok. A new alloca is generated during outlining later on for anything marked as "private" (so long the "private" information is saves in the tag). I thought we talked this in an early email. <o:p class=""></o:p></div></div></blockquote><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Can you describe how (and at which point) you get the private for "var" added to the tag?<o:p class=""></o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">-- <o:p class=""></o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Mehdi<o:p class=""></o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><br class="">By the way, all concerns you have are all valid, we had worked on resolving these issues 10+ years back when we did similar things in our compilers. I wouldn't claim we have perfect solutions, but we do reasonable good solutions for handling general directives and openmp directives. <o:p class=""></o:p></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Xinmin<br class=""><br class="">-----Original Message-----<br class="">From:<span class="Apple-converted-space"> </span><a href="mailto:mehdi.amini@apple.com" style="color: purple; text-decoration: underline;" class="">mehdi.amini@apple.com</a><span class="Apple-converted-space"> </span>[<a href="mailto:mehdi.amini@apple.com" style="color: purple; text-decoration: underline;" class="">mailto:mehdi.amini@apple.com</a>]<span class="Apple-converted-space"> </span><br class="">Sent: Tuesday, January 31, 2017 7:08 PM<br class="">To: Tian, Xinmin <<a href="mailto:xinmin.tian@intel.com" style="color: purple; text-decoration: underline;" class="">xinmin.tian@intel.com</a>><br class="">Cc: Sanjoy Das <<a href="mailto:sanjoy@playingwithpointers.com" style="color: purple; text-decoration: underline;" class="">sanjoy@playingwithpointers.com</a>>; Adve, Vikram Sadanand <<a href="mailto:vadve@illinois.edu" style="color: purple; text-decoration: underline;" class="">vadve@illinois.edu</a>>;<span class="Apple-converted-space"> </span><a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev@lists.llvm.org</a>;<span class="Apple-converted-space"> </span><a href="mailto:llvm-dev-request@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev-request@lists.llvm.org</a><br class="">Subject: Re: [llvm-dev] [RFC] IR-level Region Annotations<br class=""><br class=""><br class=""><br class=""><o:p class=""></o:p></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On Jan 31, 2017, at 6:48 PM, Tian, Xinmin <<a href="mailto:xinmin.tian@intel.com" style="color: purple; text-decoration: underline;" class="">xinmin.tian@intel.com</a>> wrote:<o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Let me try this.<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">You can simply consider the prepare-phase (e.g. pre-privatization) were done in FE (actually a library can be used by multiple FEs at LLVM IR level), the region is run with 1 thread, region annotation (scope, single-entry-single-exit) as memory barrier conservatively for now (instead of checking individual memory dependency, aliasing via tags which is the actual implementation is done) marked with region intrinsic functions. What optimization will mess up with this region-annotation? <o:p class=""></o:p></div></blockquote><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><br class="">The first thing that comes to my mind is inlining that can put the IR in a form that breaks the invariant you tried to enforce with your "prepare-phase” (for example by hoisting an allocas).<br class=""><br class="">—<span class="Apple-converted-space"> </span><br class="">Mehdi<br class=""><br class=""><br class=""><br class=""><o:p class=""></o:p></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">-----Original Message-----<o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">From:<span class="Apple-converted-space"> </span><a href="mailto:mehdi.amini@apple.com" style="color: purple; text-decoration: underline;" class="">mehdi.amini@apple.com</a><span class="Apple-converted-space"> </span>[<a href="mailto:mehdi.amini@apple.com" style="color: purple; text-decoration: underline;" class="">mailto:mehdi.amini@apple.com</a>]<o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Sent: Tuesday, January 31, 2017 5:47 PM<o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">To: Tian, Xinmin <<a href="mailto:xinmin.tian@intel.com" style="color: purple; text-decoration: underline;" class="">xinmin.tian@intel.com</a>><o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Cc: Sanjoy Das <<a href="mailto:sanjoy@playingwithpointers.com" style="color: purple; text-decoration: underline;" class="">sanjoy@playingwithpointers.com</a>>; Adve, Vikram Sadanand <<a href="mailto:vadve@illinois.edu" style="color: purple; text-decoration: underline;" class="">vadve@illinois.edu</a>>;<span class="Apple-converted-space"> </span><a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev@lists.llvm.org</a>;<span class="Apple-converted-space"> </span><a href="mailto:llvm-dev-request@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev-request@lists.llvm.org</a><o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Subject: Re: [llvm-dev] [RFC] IR-level Region Annotations<o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On Jan 31, 2017, at 5:38 PM, Tian, Xinmin <<a href="mailto:xinmin.tian@intel.com" style="color: purple; text-decoration: underline;" class="">xinmin.tian@intel.com</a>> wrote:<o:p class=""></o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Ok, but this looks like a “workaround" for your specific use-case, I don’t see how it can scale as a model-agnostic and general-purpose region semantic.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I would say it is a design trade-off.<o:p class=""></o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I’m not sure if we’re talking about the same thing here: my understanding at this point is that the design trading-off you’re making “simplicity” by scarifying “correctness”.<o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Requiring the IR to stay in what you’re calling a “canonical” form in your answer to Sanjoy in order to not miscompile a program is not an approach that seems compatible with how we deal with the IR usually.<o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Regardless it is a new instruction or an intrinsics with token/tag, it will consist of model-agnostic part and model-non-agnostic part. The package comes with a framework for parsing and using these intrinsics. See the reply I had for Sanjoy's email.<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">The answer to Sanjoy is not really helpful to clarify anything to me. At this point I still don’t understand how this is supposed to be correct in general.<o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">It would be helpful to have a LangRef patch that describes the semantic associated to your region intrinsics. Then we may be able to process some examples through the formalized description.<o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">—<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Mehdi<o:p class=""></o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">-----Original Message-----<o:p class=""></o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">From:<span class="Apple-converted-space"> </span><a href="mailto:mehdi.amini@apple.com" style="color: purple; text-decoration: underline;" class="">mehdi.amini@apple.com</a><span class="Apple-converted-space"> </span>[<a href="mailto:mehdi.amini@apple.com" style="color: purple; text-decoration: underline;" class="">mailto:mehdi.amini@apple.com</a>]<o:p class=""></o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Sent: Saturday, January 21, 2017 1:57 PM<o:p class=""></o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">To: Tian, Xinmin <<a href="mailto:xinmin.tian@intel.com" style="color: purple; text-decoration: underline;" class="">xinmin.tian@intel.com</a>><o:p class=""></o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Cc: Sanjoy Das <<a href="mailto:sanjoy@playingwithpointers.com" style="color: purple; text-decoration: underline;" class="">sanjoy@playingwithpointers.com</a>>; Adve, Vikram Sadanand <<a href="mailto:vadve@illinois.edu" style="color: purple; text-decoration: underline;" class="">vadve@illinois.edu</a>>;<span class="Apple-converted-space"> </span><a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev@lists.llvm.org</a>;<span class="Apple-converted-space"> </span><a href="mailto:llvm-dev-request@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev-request@lists.llvm.org</a><o:p class=""></o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Subject: Re: [llvm-dev] [RFC] IR-level Region Annotations<o:p class=""></o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On Jan 20, 2017, at 11:17 AM, Tian, Xinmin <<a href="mailto:xinmin.tian@intel.com" style="color: purple; text-decoration: underline;" class="">xinmin.tian@intel.com</a>> wrote:<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">This means that the optimizer has to be aware of it, I’m missing the magic here?<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">This is one option. <o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">The another option is that, as I mentioned in our LLVM-HPC paper in our implementation. We have a "prepare phase for pre-privatization" can be invoked by both Clang FE and Fortran FE right after LLVM IR is generated. So, in this way, we are able to minimize the optimizations impact for the original val and I<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Ok, but this looks like a “workaround" for your specific use-case, I don’t see how it can scale as a model-agnostic and general-purpose region semantic.<o:p class=""></o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">The fact that you needed this pre-step in the first place seems to indicate to me that it confirms what multiple people expressed in this thread, for example what Daniel wrote here:<span class="Apple-converted-space"> </span><a href="http://lists.llvm.org/pipermail/llvm-dev/2017-January/108997.html" style="color: purple; text-decoration: underline;" class="">http://lists.llvm.org/pipermail/llvm-dev/2017-January/108997.html</a><o:p class=""></o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">—<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Mehdi<o:p class=""></o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">{ void main() {<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">i32* val = alloca i32<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">i32* I = alloca 32<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">i32* priv_val = alloca i32<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">i32* priv_i alloca 32<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">tok = llvm.experimental.intrinsic_a()[ "DIR.PARALLEL"(),"QUAL.PRIVATE"(i32* %priv_val, i32 %priv_i), "QUAL.NUM_THREADS"(i32 4)]<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">%priv_i = omp_get_thread_num();<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">compute_something_into_val(%priv_val, %priv_i); <o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">a[priv_i] = %priv_val;<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">llvm.experimental.intrinsic_b(tok)["DIR.END.PARALLEL"()];<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">....<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I =<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Val =<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Foo(val, i).<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">}<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">"Prepare phase" is our way of minimizing the impact to existing optimizations.<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Xinmin<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">-----Original Message-----<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">From:<span class="Apple-converted-space"> </span><a href="mailto:mehdi.amini@apple.com" style="color: purple; text-decoration: underline;" class="">mehdi.amini@apple.com</a><span class="Apple-converted-space"> </span>[<a href="mailto:mehdi.amini@apple.com" style="color: purple; text-decoration: underline;" class="">mailto:mehdi.amini@apple.com</a>]<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Sent: Friday, January 20, 2017 10:54 AM<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">To: Tian, Xinmin<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Cc: Sanjoy Das; Adve, Vikram Sadanand;<span class="Apple-converted-space"> </span><a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev@lists.llvm.org</a>;<span class="Apple-converted-space"> </span><a href="mailto:llvm-dev-request@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev-request@lists.llvm.org</a><o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Subject: Re: [llvm-dev] [RFC] IR-level Region Annotations<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On Jan 20, 2017, at 10:44 AM, Tian, Xinmin via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev@lists.llvm.org</a>> wrote:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Sanjoy, the IR would be like something below. It is ok to hoist alloca instruction outside the region. There are some small changes in optimizer to understand region-annotation intrinsic. <o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">{ void main() {<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">i32* val = alloca i32<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">tok = llvm.experimental.intrinsic_a()[ "DIR.PARALLEL"(),<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">"QUAL.PRIVATE"(i32* val), "QUAL.NUM_THREADS"(i32 4)]<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">int i = omp_get_thread_num();<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">compute_something_into_val(val, i);<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">a[i] = val;<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">llvm.experimental.intrinsic_b(tok)["DIR.END.PARALLEL"()];<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">}<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">With above representation, we can do privatization and outlining as<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">below<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">{ void main() {<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">i32* val = alloca i32<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">i32* I = alloca 32<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">tok = llvm.experimental.intrinsic_a()[ "DIR.PARALLEL"(),<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">"QUAL.PRIVATE"(i32* %val, i32 %i), "QUAL.NUM_THREADS"(i32 4)]<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">%ii = omp_get_thread_num();<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">compute_something_into_val(%val, %i); a[i] = %val;<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">llvm.experimental.intrinsic_b(tok)["DIR.END.PARALLEL"()];<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">}<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Here we come to the interesting part: the hoisting of "i32* I = alloca 32” above the intrinsics required to update the intrinsics information “QUAL.PRIVATE”.<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">This means that the optimizer has to be aware of it, I’m missing the magic here?<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I understand that an openmp specific optimization can do it, the question is how it an openmp agnostic supposed to behave in face of llvm.experimental.intrinsic_a?<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">—<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Mehdi<o:p class=""></o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">1. create i32* priv_val = alloca i32 %priv_i = ...in the region, and replace all %val with %prv_val in the region.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">2. perform outlining.<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Caller code<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">....<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">omp_push_num_threads(4)<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">omp_fork_call( .... outline_par_region....) ....<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Callee code:<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Outlined_par_rgion {<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I32* priv_val = alloca 32<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I32* priv_i = ....<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Ret<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">}<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">For OpenMP, we do support it at -O0, -O1, -O2 and -O3. We had to make sure it runs correctly w/ and w/o optimizations and advanced analysis. So we need to preserve all source information for BE. <o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">You can take a look our LLVM-HPC paper for a bit some details. There are still tons of work to be done. Thanks.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Xinmin<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">-----Original Message-----<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">From: llvm-dev [<a href="mailto:llvm-dev-bounces@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">mailto:llvm-dev-bounces@lists.llvm.org</a>] On Behalf Of Sanjoy Das via llvm-dev<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Sent: Thursday, January 19, 2017 10:13 PM<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">To: Adve, Vikram Sadanand <<a href="mailto:vadve@illinois.edu" style="color: purple; text-decoration: underline;" class="">vadve@illinois.edu</a>><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Cc: llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev@lists.llvm.org</a>>;<span class="Apple-converted-space"> </span><a href="mailto:llvm-dev-request@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev-request@lists.llvm.org</a><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Subject: Re: [llvm-dev] [RFC] IR-level Region Annotations<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Hi Vikram,<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On Thu, Jan 19, 2017 at 9:27 PM, Adve, Vikram Sadanand <<a href="mailto:vadve@illinois.edu" style="color: purple; text-decoration: underline;" class="">vadve@illinois.edu</a>> wrote:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Hi Sanjoy,<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Yes, that's exactly what we have been looking at recently here, but<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">the region tags seem to make it possible to express the control flow<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">as well, so I think we could start with reg ions+metadata, as Hal and<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I'm not yet convinced that region tags are sufficient to model exotic control flow.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">(I don't know OpenMP so this is a copy-pasted-edited example)<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Say we have:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">void main() {<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">#pragma omp parallel num_threads(4)<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">{<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">int i = omp_get_thread_num();<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">int val;<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">compute_something_into_val(&val, i);<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">a[i] = val;<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">}<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">}<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I presume the (eventual) intended lowering is something like this (if the intended lowering is different than this, and avoids the issue I'm trying to highlight then my point is moot):<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">void main() {<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">tok = llvm.experimental.intrinsic_a();<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">int i = omp_get_thread_num();<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">i32* val = alloca i32<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">compute_something_into_val(val, i);<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">a[i] = val;<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">llvm.experimental.intrinsic_b(tok);<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">}<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">However, LLVM is free to hoist the alloca to the entry block:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">void main() {<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">i32* val = alloca i32<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">tok = llvm.experimental.intrinsic_a();<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">int i = omp_get_thread_num();<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">compute_something_into_val(val, i);<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">a[i] = val;<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">llvm.experimental.intrinsic_b(tok);<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">}<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">and now you have a race between the four parallel forks.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">The problem here is that nothing in the IR expresses that we have four copies of the region running "at the same time". In fact, such a control flow is alien to LLVM today.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">For instance, another evil optimization may turn:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">void main() {<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">int a[4];<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">#pragma omp parallel num_threads(4)<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">{<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">int i = omp_get_thread_num();<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">int val = compute_something_into_val(i);<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">a[i] = val;<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">}<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">return a[0] + a[1];<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">}<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">to<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">void main() {<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">int a[4];<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">#pragma omp parallel num_threads(4)<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">{<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">int i = omp_get_thread_num();<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">int val = compute_something_into_val(i);<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">a[i] = val;<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">}<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">return undef;<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">}<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">since a[i] = val could have initialized at most one element in a.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Now you could say that the llvm.experimental.intrinsic_a and llvm.experimental.intrinsic_b intrinsics are magic, and even such "obvious" optimizations are not allowed to happen across them; but then calls to these intrinsics is pretty fundamentally different from "normal" calls, and are probably best modeled as new instructions.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">You're going to have to do the same kind of auditing of passes either way, and the only extra cost of a new instruction is the extra bitcode reading / writing code.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I hope I made sense.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">-- Sanjoy<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Xinmin proposed, and then figure out what needs to be first class<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">instructions.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">--Vikram Adve<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On Jan 19, 2017, at 11:03 PM, Sanjoy Das <<a href="mailto:sanjoy@playingwithpointers.com" style="color: purple; text-decoration: underline;" class="">sanjoy@playingwithpointers.com</a>> wrote:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Hi,<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">My bias is to use both (b) and (d), since they have complementary<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">strengths. We should use (b) for expressing concepts that can't be<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">semantically modeled as a call or invoke (this branch takes both its<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">successors), and (d) for expressing things that can be (this call may<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">never return), and annotation like things (this region (denoted by<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">def-use of a token) is a reduction).<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I don't grok OpenMP, but perhaps we can come with one or two<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">"generalized control flow"-type instructions that can be used to<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">model the non-call/invoke like semantics we'd like LLVM to know<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">about, and model the rest with (d)?<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">-- Sanjoy<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On Thu, Jan 19, 2017 at 8:28 PM, Hal Finkel via llvm-dev<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><<a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev@lists.llvm.org</a>> wrote:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On 01/19/2017 03:36 PM, Mehdi Amini via llvm-dev wrote:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On Jan 19, 2017, at 1:32 PM, Daniel Berlin <<a href="mailto:dberlin@dberlin.org" style="color: purple; text-decoration: underline;" class="">dberlin@dberlin.org</a>> wrote:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On Thu, Jan 19, 2017 at 1:12 PM, Mehdi Amini <<a href="mailto:mehdi.amini@apple.com" style="color: purple; text-decoration: underline;" class="">mehdi.amini@apple.com</a>> wrote:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On Jan 19, 2017, at 12:04 PM, Daniel Berlin <<a href="mailto:dberlin@dberlin.org" style="color: purple; text-decoration: underline;" class="">dberlin@dberlin.org</a>> wrote:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On Thu, Jan 19, 2017 at 11:46 AM, Mehdi Amini via llvm-dev<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><<a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev@lists.llvm.org</a>> wrote:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On Jan 19, 2017, at 11:36 AM, Adve, Vikram Sadanand via llvm-dev<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><<a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev@lists.llvm.org</a>> wrote:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Hi Johannes,<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I am especially curious where you get your data from. Tapir [0]<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">(and to some degree PIR [1]) have shown that,<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">counterintuitively, only a few changes to LLVM passes are<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">needed. Tapir was recently used in an MIT class with a lot of<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">students and it seemed to work well with only minimal changes to<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">analysis and especially transformation passes.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">TAPIR is an elegant, small extension and, in particular, I think<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">the idea of asymmetric parallel tasks and control flow is a<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">clever way to express parallelism with serial semantics, as in<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Cilk. Encoding the control flow extensions as explicit<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">instructions is orthogonal to that, though arguably more elegant than using region tags + metadata.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">However, Cilk is a tiny language compared with the full<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">complexity of other languages, like OpenMP. To take just one<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">example, TAPIR cannot express the ORDERED construct of OpenMP. A<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">more serious concern, IMO, is that TAPIR (like Cilk) requires<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">serial semantics, whereas there are many parallel languages, OpenMP included, that do not obey that restriction.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Third, OpenMP has *numerous* clauses, e.g., REDUCTION or PRIVATE,<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">that are needed because without that, you’d be dependent on<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">fundamentally hard compiler analyses to extract the same<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">information for satisfactory parallel performance; realistic<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">applications cannot depend on the success of such analyses.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I agree with this, but I’m also wondering if it needs to be first<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">class in the IR?<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">For example we know our alias analysis is very basic, and C/C++<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">have a higher constraint thanks to their type system, but we<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">didn’t inject this higher level information that helps the<span class="Apple-converted-space"> </span><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">optimizer as first class IR constructs.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">FWIW, while i agree with the general point, i wouldn't use this example.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Because we pretty much still suffer to this day because of it (both<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">in AA, and devirt, and ...) :) We can't always even tell fields<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">apart<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Is it inherent to the infrastructure, i.e. using metadata instead<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">of first class IR construct or is it just a “quality of implementation” issue?<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Not to derail this conversation:<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">IMHO, At some point there is no real difference :)<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Because otherwise, everything is a QOI issue.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">IE if it's super tricky to get metadata that works well and works<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">right, doesn't get lost, etc, and that's inherent to using metadata,<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">that to me is not a QOI issue.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">So could it be done with metadata? Probably?<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">But at the same time, if it had been done with more first class<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">constructs, it would have happened years ago and been much lower cost.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">This is what I meant by “inherent to the infrastructure”, thanks for<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">clarifying.<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">To clarify, we were proposing metadata that is used as arguments to<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">the region-annotation intrinsics. This metadata has the nice<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">property that it does not get dropped (so it is just being used as a<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">way of encoding whatever data structures are necessary without predefining a syntactic schema).<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">-Hal<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">—<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Mehdi<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">_______________________________________________<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">LLVM Developers mailing list<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class="">llvm-dev@lists.llvm.org</a><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><a href="http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev" style="color: purple; text-decoration: underline;" class="">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</a><o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">--<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Hal Finkel<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Lead, Compiler Technology and Programming Languages Leadership<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Computing Facility Argonne National Laboratory<o:p class=""></o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote style="margin-top: 5pt; 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