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    <head>
      <base href="https://bugs.llvm.org/">
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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 - -DLLVM_REVERSE_ITERATION:BOOL=ON in stage2 produces file comparison failures with stage3"
   href="https://bugs.llvm.org/show_bug.cgi?id=34956">34956</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>-DLLVM_REVERSE_ITERATION:BOOL=ON in stage2 produces file comparison failures with stage3
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>new-bugs
          </td>
        </tr>

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

        <tr>
          <th>Hardware</th>
          <td>Macintosh
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>MacOS X
          </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>new bugs
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>howarth.mailing.lists@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>When building a stage2 compiler from llvm trunk using
-DLLVM_REVERSE_ITERATION:BOOL=ON and then a stage3 compiler with
-DLLVM_REVERSE_ITERATION:BOOL=OFF, the stage2/stage3 object file comparison
produces many failures.

UNRESOLVED DIFFS (stage2 vs. stage3):
  include/llvm/Config/abi-breaking.h
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/AliasAnalysis.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/AssumptionCache.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/BasicAliasAnalysis.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/BlockFrequencyInfo.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/BlockFrequencyInfoImpl.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/BranchProbabilityInfo.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CFG.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CFLAndersAliasAnalysis.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CFLSteensAliasAnalysis.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CGSCCPassManager.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CallGraphSCCPass.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CaptureTracking.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CodeMetrics.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstantFolding.cpp.o
  lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DemandedBits.cpp.o
...

This behavior is very reproducible but only when
-DLLVM_REVERSE_ITERATION:BOOL=ON is involved in the stage2 build.</pre>
        </div>
      </p>


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