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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - optimization passes created malformed bitcode"
href="http://llvm.org/bugs/show_bug.cgi?id=20210">20210</a>
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<th>Summary</th>
<td>optimization passes created malformed bitcode
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>janne-llvm@jannau.net
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=12738" name="attach_12738" title="reduced c sources">attachment 12738</a> <a href="attachment.cgi?id=12738&action=edit" title="reduced c sources">[details]</a></span>
reduced c sources
clang -O0 of the attached test_zext_fail.c creates on x86_64 attached
test_zext_fail.bc using llvm trunk r212318. Following set of optimization
passes create malformed bitcode:
opt -S test_zext_fail.bc -sroa -early-cse -simplifycfg -instcombine
-simplifycfg
Instruction does not dominate all uses!
%conv7 = zext i8 %p1 to i32
call void @fn2(i32 %conv7) #2
LLVM ERROR: Broken function found, compilation aborted!
The problem is reporduceable with the aarch64 backend.</pre>
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