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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SelectionDAG] OptLevelChanger::SavedFastISel uninitialized variable warning"
href="https://bugs.llvm.org/show_bug.cgi?id=44471">44471</a>
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<th>Summary</th>
<td>[SelectionDAG] OptLevelChanger::SavedFastISel uninitialized variable warning
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Common Code Generator Code
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>llvm-dev@redking.me.uk
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, llvm-dev@ndave.org, paul_robinson@playstation.sony.com, spatel+llvm@rotateright.com
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<p>
<div>
<pre><a href="https://llvm.org/reports/scan-build/report-SelectionDAGISel.cpp-~OptLevelChanger-9-1.html#EndPath">https://llvm.org/reports/scan-build/report-SelectionDAGISel.cpp-~OptLevelChanger-9-1.html#EndPath</a>
OptLevelChanger(SelectionDAGISel &ISel,
CodeGenOpt::Level NewOptLevel) : IS(ISel) {
SavedOptLevel = IS.OptLevel;
if (NewOptLevel == SavedOptLevel)
return;
IS.OptLevel = NewOptLevel;
IS.TM.setOptLevel(NewOptLevel);
DEBUG(dbgs() << "\nChanging optimization level for Function "
<< IS.MF->getFunction()->getName() << "\n");
DEBUG(dbgs() << "\tBefore: -O" << SavedOptLevel
<< " ; After: -O" << NewOptLevel << "\n");
SavedFastISel = IS.TM.Options.EnableFastISel;
if (NewOptLevel == CodeGenOpt::None) {
IS.TM.setFastISel(IS.TM.getO0WantsFastISel());
DEBUG(dbgs() << "\tFastISel is "
<< (IS.TM.Options.EnableFastISel ? "enabled" : "disabled")
<< "\n");
}
}
Static analyzer has noticed that SavedFastISel is not initialized if the
"NewOptLevel == SavedOptLevel" warl out occurs.</pre>
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