<html>
    <head>
      <base href="https://llvm.org/bugs/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - LNT build fails with -polly-position=before-vectorizer"
   href="https://llvm.org/bugs/show_bug.cgi?id=25344">25344</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>LNT build fails with -polly-position=before-vectorizer
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>Projects
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Polly
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>polly-dev@googlegroups.com
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>llvm@meinersbur.de
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Command to invoke:

bin/lnt runtest nt -j8 \
    --sandbox "${SANDBOX}" \
    --cc clang --cxx clang++ --mllvm -polly \
    --test-suite llvm/projects/test-suite 0j8 \
    --mllvm -polly-position=before-vectorizer

Failing tests:

FAIL: MultiSource/Benchmarks/7zip/7zip-benchmark.compile_time (1 of 1992)
FAIL: MultiSource/Benchmarks/sim/sim.execution_time (499 of 1992)
FAIL:
SingleSource/Benchmarks/Polybench/medley/reg_detect/reg_detect.execution_time
(500 of 1992)

7zip-benchmark fails with an assertion:

llvm::ScalarEvolution::getConstantEvolutionLoopExitValue(llvm::PHINode*, const
llvm::APInt&, const llvm::Loop*): Assertion `PN->getNumIncomingValues() == 2 &&
"Follows from having one latch!"' failed.
0  clang-3.8       0x00000000019d57f8
llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 56
1  clang-3.8       0x00000000019d4106 llvm::sys::RunSignalHandlers() + 54
2  clang-3.8       0x00000000019d433a
3  libpthread.so.0 0x00007fb09d634d10
4  libc.so.6       0x00007fb09c7d4267 gsignal + 55
5  libc.so.6       0x00007fb09c7d5eca abort + 362
6  libc.so.6       0x00007fb09c7cd03d
7  libc.so.6       0x00007fb09c7cd0f2
8  clang-3.8       0x0000000001289dcf
9  clang-3.8       0x00000000012a629a
10 clang-3.8       0x00000000012a6a89
llvm::ScalarEvolution::getSCEVAtScope(llvm::SCEV const*, llvm::Loop const*) +
201
[...]


sim and reg_detect faiil because the output differs from the reference output.

Using trunk revision 251341.

Also see
<a href="http://gcc12.fsffrance.org:8011/builders/perf-x86_64-penryn-O3-polly/builds/389">http://gcc12.fsffrance.org:8011/builders/perf-x86_64-penryn-O3-polly/builds/389</a></pre>
        </div>
      </p>
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