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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [LoopSimplifyCFG] -enable-loop-simplifycfg-term-folding causes many assertion failures"
href="https://bugs.llvm.org/show_bug.cgi?id=39783">39783</a>
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<th>Summary</th>
<td>[LoopSimplifyCFG] -enable-loop-simplifycfg-term-folding causes many assertion failures
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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>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>Loop Optimizer
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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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<div>
<pre>I got a lot of assertions from the previous weeks test runs (csmith), to find
that they were all "hidden" with a later revision. Since I did not find these
asserts here on Bugzilla, I continued with a git bisect and found out that
there has been a new option '-enable-loop-simplifycfg-term-folding' addedwhich
defaults to false, which disables the(se) bug(s).
I continued to make three reduced test cases for the different asserts I saw,
which I will post here in a minute.
And then, after all this, I found that this is actually a known issue with
XFAILing test case using the option:
test/Transforms/LoopSimplifyCFG/phi_with_duplicating_inputs.ll :-/
I wish that this would have been posted here on Bugzilla, or at least explained
as a comment around that option, or in the commit messages. There appears to
not even have been any review made, so I am a bit confused. Perhaps I just
missed this information somewhere?
I wonder now if my test cases are redundant with the XFAILing ones? Could the
committer perhaps make further comments on this, please?</pre>
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