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    <head>
      <base href="https://bugs.llvm.org/">
    </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 - Non-affine loops not code generated corretly"
   href="https://bugs.llvm.org/show_bug.cgi?id=33265">33265</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Non-affine loops not code generated corretly
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>Polly
          </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>enhancement
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>Optimizer
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>tobias@grosser.es
          </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=18556" name="attach_18556" title="Test case">attachment 18556</a> <a href="attachment.cgi?id=18556&action=edit" title="Test case">[details]</a></span>
Test case

The attached test case breaks as follows:

po /tmp/non-affine-loop-not-working.ll -polly-allow-nonaffine-loops
-polly-process-unprofitable -polly-codegen

Instruction does not dominate all uses!
  %indvar = phi i64 [ %indvar.next, %bb9 ], [ 0, %bb2 ]
  %p_indvar.next = add i64 %indvar, 1
Instruction does not dominate all uses!
  %indvar = phi i64 [ %indvar.next, %bb9 ], [ 0, %bb2 ]
  %0 = add i64 %x, %indvar
LLVM ERROR: Broken function found, compilation aborted!

It seems non-affine loops are broken in this case. Unfortunately it seems we
have no code-generation test coverage from the point when they have been
introduced. :(

As they are disabled by default that is not breaking anything in the default
configuration, but we should still fix this and add test cases to not regress
further.</pre>
        </div>
      </p>


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