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<p class="MsoNormal"><span style="font-family:"Courier New";color:#44546A">I was working on threading the #pragma FENV_ACCESS down into clang’s AST. But that’s on hold because Richard Smith wants more design discussion. The current method I was building on
doesn’t work for templates.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:#44546A">The clang TreeTransform class is magic that I don’t grok yet.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:#44546A"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> llvm-dev <llvm-dev-bounces@lists.llvm.org> <b>On Behalf Of
</b>Kaylor, Andrew via llvm-dev<br>
<b>Sent:</b> Tuesday, April 02, 2019 9:17 PM<br>
<b>To:</b> Michael Berg <michael_c_berg@apple.com>; llvm-dev <llvm-dev@lists.llvm.org><br>
<b>Subject:</b> Re: [llvm-dev] EuroLLVM Numerics issues<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p><b><i><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:red">EXTERNAL</span></i></b><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:red">
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<p class="MsoNormal">Hi Michael,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for raising this topic. I am very interested, but unfortunately I won’t be at EuroLLVM. Here are some things on my mind, roughly in order of how much time I’ve spent thinking about them:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">====================<o:p></o:p></p>
<p class="MsoNormal">Constrained intrinsics <o:p></o:p></p>
<p class="MsoNormal">====================<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal">Besides the backend transition problems there is a lot of work to be done to teach existing optimizations to handle the constrained intrinsics. Also, something needs to be done in the front end to generate the intrinsics. A patch has been
submitted to do something about this in IRBuilder, but I don’t believe anything has been done in the front end.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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