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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Illegal ARM THUMB udiv instruction generated from llc with -filetype=asm, but not -filetype=obj"
href="https://bugs.llvm.org/show_bug.cgi?id=35630">35630</a>
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<th>Summary</th>
<td>Illegal ARM THUMB udiv instruction generated from llc with -filetype=asm, but not -filetype=obj
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<th>Product</th>
<td>new-bugs
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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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>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>jackcarter@arxan.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<pre>Created <span class=""><a href="attachment.cgi?id=19537" name="attach_19537" title="gzipped .ll bitcode file that demonstrates the problem">attachment 19537</a> <a href="attachment.cgi?id=19537&action=edit" title="gzipped .ll bitcode file that demonstrates the problem">[details]</a></span>
gzipped .ll bitcode file that demonstrates the problem
The test attached was produced by llvm-extract. The size actually is deceiving
because the actual code in the bitcode takes up less than 120 lines.
llvm-extract pulls in a lot if not all of the original declarations and types
it seems.
This produces the illegal instruction:
llc -filetype=asm -relocation-model=pic -no-stack-coloring
./hkey_expansion_core.bc -o hkey_expansion_core.s
grep udiv hkey_expansion_core.s
Direct object output does not:
llc -filetype=obj -relocation-model=pic -no-stack-coloring
./hkey_expansion_core.bc -o hkey_expansion_core.o
llvm-objdump -arch-name=arm hkey_expansion_core.o > hkey_expansion_core.dis
If I need to reduce the problem further using bugpoint I would be glad for any
suggestions on how to do that since it seems that I would need a .s file with
the desired output and for now I am not sure what that would be other than not
“udiv”. Possibly setting up registers and calling one of the udiv intrinsics.
Regards,
Jack</pre>
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