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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [opt; GVN] input program causes "Instruction does not dominate uses" error"
href="https://bugs.llvm.org/show_bug.cgi?id=33731">33731</a>
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<th>Summary</th>
<td>[opt; GVN] input program causes "Instruction does not dominate uses" error
</td>
</tr>
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>4.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>eric.schweitz@pgroup.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=18772" name="attach_18772" title="reproduce the instruction does not dominate uses bug">attachment 18772</a> <a href="attachment.cgi?id=18772&action=edit" title="reproduce the instruction does not dominate uses bug">[details]</a></span>
reproduce the instruction does not dominate uses bug
See the attached reproducer. To recreate the problem:
% opt -verify reduced.bc -o /dev/null
% opt -gvn reduced.bc -o /dev/null
Instruction does not dominate all uses!
%.pre = sext i32 %1 to i64
%6 = mul i64 %.pre, 4
LLVM ERROR: Broken function found, compilation aborted!
% opt -version
LLVM (<a href="http://llvm.org/">http://llvm.org/</a>):
LLVM version 4.0.1
DEBUG build with assertions.
Default target: x86_64-unknown-linux-gnu
Host CPU: haswell</pre>
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