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<body><span class="vcard"><a class="email" href="mailto:jeremy.morse.llvm@gmail.com" title="Jeremy Morse <jeremy.morse.llvm@gmail.com>"> <span class="fn">Jeremy Morse</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - [DebugInfo@O2][Dexter] Incorrect variable valuations reported from loop"
href="https://bugs.llvm.org/show_bug.cgi?id=38779">bug 38779</a>
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<table border="1" cellspacing="0" cellpadding="8">
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<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>DUPLICATE
</td>
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<td style="text-align:right;">Status</td>
<td>CONFIRMED
</td>
<td>RESOLVED
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - [DebugInfo@O2][Dexter] Incorrect variable valuations reported from loop"
href="https://bugs.llvm.org/show_bug.cgi?id=38779#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - [DebugInfo@O2][Dexter] Incorrect variable valuations reported from loop"
href="https://bugs.llvm.org/show_bug.cgi?id=38779">bug 38779</a>
from <span class="vcard"><a class="email" href="mailto:jeremy.morse.llvm@gmail.com" title="Jeremy Morse <jeremy.morse.llvm@gmail.com>"> <span class="fn">Jeremy Morse</span></a>
</span></b>
<pre>Looking before-and-after livedebugvalues in recent clang, the DBG_VALUE
assigning "sum" the value zero, is unsoundly propagated into the loop body from
the preheader / entry block, after which we get the weird variable location
behaviour. This is definitely the "livedebugvalues ignores backedges" problem
in <a class="bz_bug_link
bz_status_CONFIRMED "
title="CONFIRMED - [DebugInfo@O2][Dexter] For loop upper bound not tracked correctly by DWARF location list causing misleading watch window values."
href="show_bug.cgi?id=38997">bug 38997</a>.
*** This bug has been marked as a duplicate of <a class="bz_bug_link
bz_status_CONFIRMED "
title="CONFIRMED - [DebugInfo@O2][Dexter] For loop upper bound not tracked correctly by DWARF location list causing misleading watch window values."
href="show_bug.cgi?id=38997">bug 38997</a> ***</pre>
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