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Thank you for the response.</div>
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What's the difference between running clang with the -emit-llvm option vs running it with the --target=<mytarget> option.</div>
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The error I described happens only if I run: <span style="font-family: "Courier New", monospace;">
clang --target=<mytarget> <inputfile>.c</span></div>
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However if I do <span style="font-family: "Courier New", monospace;">clang -emit-llvm <inputfile>.c -o <outputfile>.bc</span>
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and then <span style="font-family: "Courier New", monospace;">llc </span><span style="font-family: "Courier New", monospace;">-march=</span><span style="font-family: "Courier New", monospace;"><mytarget>
</span><span style="font-family: "Courier New", monospace;"><outputfile>.bc</span>, no error occurs</div>
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Thanks<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> qcolombet@apple.com <qcolombet@apple.com> on behalf of Quentin Colombet <qcolombet@apple.com><br>
<b>Sent:</b> Tuesday, April 16, 2019 3:05 PM<br>
<b>To:</b> Josh Sharp<br>
<b>Cc:</b> via llvm-dev<br>
<b>Subject:</b> Re: [llvm-dev] Virtual register defs don't dominate all uses</font>
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<div class="" style="word-wrap:break-word; line-break:after-white-space">Hi Josh,
<div class=""><br class="">
</div>
<div class="">That means that at least one use of the reporter virtual register happens before its definition.</div>
<div class="">E.g.,</div>
<div class="">… = V1 <—— V1 is not defined here</div>
<div class="">V1 = … <— V1 def does not dominate all its use</div>
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<div>Cheers,</div>
<div>-Quentin<br class="">
<blockquote type="cite" class="">
<div class="">On Apr 16, 2019, at 2:47 PM, Josh Sharp via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>> wrote:</div>
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Hi all,</div>
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I'm getting this error: "Virtual register defs don't dominate all uses". It comes from llvm/lib/CodeGen/MachineVerifier.cpp:2138<span class="x_Apple-converted-space"> </span><br class="">
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I don't understand what it means. Does anyone know?</div>
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Thanks.<br class="">
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<span class="" style="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; text-decoration:none; float:none; display:inline!important">_______________________________________________</span><br class="" style="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; text-decoration:none">
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<a href="mailto:llvm-dev@lists.llvm.org" class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; orphans:auto; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:auto; word-spacing:0px">llvm-dev@lists.llvm.org</a><br class="" style="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; text-decoration:none">
<a href="https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev" class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; orphans:auto; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:auto; word-spacing:0px">https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</a></div>
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