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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [AssumptionCache] Assertion "Cache contains multiple copies of a call! "' failed."
   href="https://bugs.llvm.org/show_bug.cgi?id=49043">49043</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[AssumptionCache]  Assertion "Cache contains multiple copies of a call! "' failed.
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>libraries
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </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>Scalar Optimizations
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>paulsson@linux.vnet.ibm.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=24484" name="attach_24484" title="reduced testcase">attachment 24484</a> <a href="attachment.cgi?id=24484&action=edit" title="reduced testcase">[details]</a></span>
reduced testcase

opt -mtriple=s390x-unknown-linux -mcpu=z13 -O3 -enable-gvn-sink tc.ll

AssumptionCache.cpp:246: void
llvm::AssumptionCache::registerAssumption(llvm::CallInst*): Assertion
`AssumptionSet.insert(VH).second && "Cache contains multiple copies of a
call!"' failed.
#11 0x000002aa164a48b6 (anonymous namespace)::LoopUnroll::runOnLoop

A git bisect showed that f88a797 "[LoopDeletion] Allows deletion of possibly
infinite side-effect free loops" seems to be the first commit that resulted in
/ exposed this error.</pre>
        </div>
      </p>


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