<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Title" content="">
<meta name="Keywords" content="">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman",serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.apple-tab-span
{mso-style-name:apple-tab-span;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.msoIns
{mso-style-type:export-only;
mso-style-name:"";
text-decoration:underline;
color:teal;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:595.0pt 842.0pt;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style>
</head>
<body bgcolor="white" lang="EN-GB" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Hi Kuba.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">I would be surprised if this patch is responsible, as from the code it looks that it only changes behaviour if feature ‘lse’ is selected (part of
armv8.1a and later) while the log shows that built targets armv7a (which does not have that feature). Anyway, I’ve added the author of this patch (Ananth Jasty) to the recipients list so that he is aware of the issue.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Christof<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="margin-left:.5in"><b><span style="font-family:"Calibri",sans-serif;color:black">From:
</span></b><span style="font-family:"Calibri",sans-serif;color:black"><mracek@apple.com> on behalf of Kuba Mracek <mracek@apple.com><br>
<b>Date: </b>Saturday, 24 June 2017 at 00:05<br>
<b>To: </b>Christof Douma <Christof.Douma@arm.com>, llvm-commits <llvm-commits@lists.llvm.org>, Tim Northover <tnorthover@apple.com>, "renato.golin@linaro.org" <renato.golin@linaro.org><br>
<b>Cc: </b>Andi <abergen@apple.com><br>
<b>Subject: </b>r305918 and "Bad machine code: Using an undefined physical register"<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
<p class="MsoNormal" style="margin-left:.5in">Hi guys, <o:p></o:p></p>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in">I've seen you've be involved in "[llvm] r305918 - [AARCH64][LSE] Preliminary support for ARMv8.1 LSE Atomics", which I suspect might be related to a recent failure on one of the 2-stage bots:<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"> <<a href="http://green.lab.llvm.org/green/job/clang-stage1-cmake-RA-expensive/7037/console">http://green.lab.llvm.org/green/job/clang-stage1-cmake-RA-expensive/7037/console</a>><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in">There many more commits on the blamelist, so r305918 might not be the cause, but do you think you could take a look?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in">Here's some relevant error info:<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
<div>
<div>
<p class="MsoNormal" style="margin-left:.5in">BL <ga:@vscanf>, <regmask %FP %LR %B8 %B9 %B10 %B11 %B12 %B13 %B14 %B15 %D8 %D9 %D10 %D11 %D12 %D13 %D14 %D15 %H8 %H9 %H10 %H11 %H12 %H13 %H14 %H15 %S8 %S9 %S10 %S11 %S12 %S13 %S14 %S15 %W19 %W20 %W21 %W22 %W23
%W24 %W25 %W26 %W27 %W28 %W29 %W30 %X19 %X20 %X21 %X22 %X23 %X24 %X25 %X26 %X27 %X28 %D8_D9 %D9_D10 %D10_D11 %D11_D12 %D12_D13 %D13_D14 %D14_D15 %D8_D9_D10_D11 %D9_D10_D11_D12 %D10_D11_D12_D13 %D11_D12_D13_D14 %D12_D13_D14_D15 %D8_D9_D10 %D9_D10_D11 %D10_D11_D12
%D11_D12_D13 %D12_D13_D14 %D13_D14_D15 %W19_W20 %W20_W21 %W21_W22 %W22_W23 %W23_W24 %W24_W25 %W25_W26 %W26_W27 %W27_W28 %W28_W29 %W29_W30 %FP_LR %X28_FP %X19_X20 %X20_X21 %X21_X22 %X22_X23 %X23_X24 %X24_X25 %X25_X26 %X26_X27 %X27_X28>, %LR<imp-def,dead>, %SP<imp-use>,
%X0<imp-use>, %X1<imp-use>, %SP<imp-def>, %W0<imp-def>; dbg:/Users/buildslave/jenkins/sharedspace/clang-stage1-cmake-RA_workspace/llvm/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:1361:1 @[ /Users/buildslave/jenkins/sharedspace/clang-stage1-cmake-RA_workspace/llvm/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:1382:1
]<o:p></o:p></p>
</div>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"> *** Bad machine code: Using an undefined physical register ***<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"> - function: wrap_scanf<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"> - basic block: BB#4 do.end33.i (0x7f9f94223ce8)<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"> - instruction: BL<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"> - operand 5: %X1<imp-use><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"> fatal error: error in backend: Found 1 machine code errors.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in">Thanks!<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in">Kuba<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
</div>
IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose,
or store or copy the information in any medium. Thank you.
</body>
</html>