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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assertion failed: ((!isa<FPMathOperator>(Neg) || Neg->isFast()) && "Expecting FastMathFlags!"), function LowerNegateToMultiply, file lib/Transforms/Scalar/Reassociate.cpp"
href="https://bugs.llvm.org/show_bug.cgi?id=42349">42349</a>
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<th>Summary</th>
<td>Assertion failed: ((!isa<FPMathOperator>(Neg) || Neg->isFast()) && "Expecting FastMathFlags!"), function LowerNegateToMultiply, file lib/Transforms/Scalar/Reassociate.cpp
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>quentin.colombet@gmail.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<pre>Created <span class=""><a href="attachment.cgi?id=22127" name="attach_22127" title="Reproducer">attachment 22127</a> <a href="attachment.cgi?id=22127&action=edit" title="Reproducer">[details]</a></span>
Reproducer
After r363813, the reassociate pass hits an assertion on the attached IR:
Assertion failed: ((!isa<FPMathOperator>(Neg) || Neg->isFast()) && "Expecting
FastMathFlags!"), function LowerNegateToMultiply, file
lib/Transforms/Scalar/Reassociate.cpp
To reproduce:
opt -reassociate reassociate.ll -S -o -</pre>
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