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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - missed opt: coalesce multiple consecutive ud2 instructions"
href="https://bugs.llvm.org/show_bug.cgi?id=43294">43294</a>
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<th>Summary</th>
<td>missed opt: coalesce multiple consecutive ud2 instructions
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Backend: X86
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>gonzalobg88@gmail.com
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<th>CC</th>
<td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, spatel+llvm@rotateright.com
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<pre>When generating LLVM-IR, one often ends up with
call @llvm.trap()
unreachable
If the frontend has set the TargetMachine option to "trap on unreachable", the
call to trap will emit an ud2, while the unreachable would emit another ud2,
often end up with multiple consecutive ud2 instructions.</pre>
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