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<body><span class="vcard"><a class="email" href="mailto:paulsson@linux.vnet.ibm.com" title="Jonas Paulsson <paulsson@linux.vnet.ibm.com>"> <span class="fn">Jonas Paulsson</span></a>
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<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - [IfConverter/BranchFolding] An empty, non-reachable MBB is not removed."
href="https://llvm.org/bugs/show_bug.cgi?id=27657">bug 27657</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>INVALID
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - [IfConverter/BranchFolding] An empty, non-reachable MBB is not removed."
href="https://llvm.org/bugs/show_bug.cgi?id=27657#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - [IfConverter/BranchFolding] An empty, non-reachable MBB is not removed."
href="https://llvm.org/bugs/show_bug.cgi?id=27657">bug 27657</a>
from <span class="vcard"><a class="email" href="mailto:paulsson@linux.vnet.ibm.com" title="Jonas Paulsson <paulsson@linux.vnet.ibm.com>"> <span class="fn">Jonas Paulsson</span></a>
</span></b>
<pre>Tried to fix this, but it turns out that empty blocks with either no
predecessors or successors are the only empty blocks left, which seems to be
difficult / unnecessary to get rid of. For the first block in function,
removing it triggers an assert that a loop header should not be first block in
function. As to empty blocks without successors, I am not sure if there could
still be a jump to such a block but it however seems harmless.
So, I close this bug without any changes, sorry for spamming.</pre>
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