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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [Polly] isl based iteration loop modeling accepts infinite loop"
href="https://llvm.org/bugs/show_bug.cgi?id=24634">24634</a>
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<th>Summary</th>
<td>[Polly] isl based iteration loop modeling accepts infinite loop
</td>
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<tr>
<th>Product</th>
<td>Projects
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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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
</td>
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<th>Component</th>
<td>Polly
</td>
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<th>Assignee</th>
<td>polly-dev@googlegroups.com
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<th>Reporter</th>
<td>tobias@grosser.es
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</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=14796" name="attach_14796" title="The broken test case">attachment 14796</a> <a href="attachment.cgi?id=14796&action=edit" title="The broken test case">[details]</a></span>
The broken test case
Hi,
it seems the isl based loop modeling accepts infinite loops. This breaks our
code generation as we currently do not expect infinite loops. I propose to
not model infinite loops for now.
$ polly-opt -polly-codegen -polly-no-early-exit named.ll
opt:
/home/grosser/Projects/polly/git/tools/polly/lib/CodeGen/IslNodeBuilder.cpp:63:
isl_ast_expr *IslNodeBuilder::getUpperBound(isl_ast_node *, ICmpInst::Predicate
&): Assertion `isl_ast_expr_get_type(Cond) == isl_ast_expr_op && "conditional
expression is not an atomic upper bound"' failed.</pre>
</div>
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