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<p style="margin-top:0;margin-bottom:0">Thanks Eli, certainly looks like something it could break. I will hopefully get a fix up today.</p>
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<p style="font-family:"Times New Roman""><span style="font-family:Calibri,Helvetica,sans-serif">Sam Parker</span></p>
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<p style="font-family:"Times New Roman""><span style="font-family:Calibri,Helvetica,sans-serif">Compilation Tools Engineer | Arm</span></p>
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<p style="font-family:"Times New Roman""><span style="font-family:Calibri,Helvetica,sans-serif">. . . . . . . . . . . . . . . . . . . . . . . . . . .</span></p>
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<p style="font-family:"Times New Roman""><span style="font-family:Calibri,Helvetica,sans-serif">Arm.com</span></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Friedman, Eli <efriedma@codeaurora.org><br>
<b>Sent:</b> 25 September 2018 20:02:27<br>
<b>To:</b> Sam Parker; llvm-commits@lists.llvm.org<br>
<b>Subject:</b> Re: [llvm] r342870 - [ARM] bottom-top mul support ARMParallelDSP</font>
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<div class="PlainText">On 9/24/2018 2:34 AM, Sam Parker via llvm-commits wrote:<br>
> Author: sam_parker<br>
> Date: Mon Sep 24 02:34:06 2018<br>
> New Revision: 342870<br>
><br>
> URL: <a href="http://llvm.org/viewvc/llvm-project?rev=342870&view=rev">http://llvm.org/viewvc/llvm-project?rev=342870&view=rev</a><br>
> Log:<br>
> [ARM] bottom-top mul support ARMParallelDSP<br>
><br>
> Originally committed in rL342210 but was reverted in rL342260 because<br>
> it was causing issues in vectorized code, because I had forgotten to<br>
> ensure that we're operating on scalar values.<br>
><br>
> Original commit message:<br>
><br>
> On failing to find sequences that can be converted into dual macs,<br>
> try to find sequential 16-bit loads that are used by muls which we<br>
> can then use smultb, smulbt, smultt with a wide load.<br>
><br>
> Differential Revision: <a href="https://reviews.llvm.org/D51983">https://reviews.llvm.org/D51983</a><br>
<br>
It looks like this is causing the polly-aosp buildbot <br>
(<a href="http://lab.llvm.org:8011/builders/aosp-O3-polly-before-vectorizer-unprofitable">http://lab.llvm.org:8011/builders/aosp-O3-polly-before-vectorizer-unprofitable</a>)
<br>
to fail. Attached reduced testcase; reproduce with "llc <br>
aosp-convolve-crash.bc".<br>
<br>
-Eli<br>
<br>
-- <br>
Employee of Qualcomm Innovation Center, Inc.<br>
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project<br>
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