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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Csmith program gives bad checksum with -optimize-regalloc=false"
href="https://bugs.llvm.org/show_bug.cgi?id=34847">34847</a>
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<th>Summary</th>
<td>Csmith program gives bad checksum with -optimize-regalloc=false
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<th>Product</th>
<td>libraries
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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>Linux
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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>Register Allocator
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>paulsson@linux.vnet.ibm.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=19241" name="attach_19241" title="reduced testcase">attachment 19241</a> <a href="attachment.cgi?id=19241&action=edit" title="reduced testcase">[details]</a></span>
reduced testcase
I have reduced a csmith program that prints
bin/clang -O3 -march=z13 tc_regalloc.bc -o a.out -w ; ./a.out
checksum = 3FB78BC1
but,
bin/clang -O3 -march=z13 tc_regalloc.bc -o a.out -w -mllvm
-optimize-regalloc=false ; ./a.out
checksum = 9E0D2F27
I had originally made a batch run with 14 different compilations with many
randomized options, which all had the 3FB... checksum, so therefore I would
guess that any other checksum is wrong.
I have used bugpoint with a script that checks the checksums for every bugpoint
program, so I am not sure if doing so is the best thing, but the checksums are
the same as for the original program.</pre>
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