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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assertion failure at LegalizeVectorOps.cpp:210"
href="https://bugs.llvm.org/show_bug.cgi?id=43510">43510</a>
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<th>Summary</th>
<td>Assertion failure at LegalizeVectorOps.cpp:210
</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>
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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>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Common Code Generator Code
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>andrew@scheidecker.net
</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=22607" name="attach_22607" title="Minimal test case">attachment 22607</a> <a href="attachment.cgi?id=22607&action=edit" title="Minimal test case">[details]</a></span>
Minimal test case
With the attached crash1.ll, running 'llc crash1.ll -O0' in a debug build of
LLVM triggers this assertion failure:
Assertion failed: LegalizedNodes.count(OldRoot) && "Root didn't get
legalized?", file
C:\Dev\llvm9\llvm\lib\CodeGen\SelectionDAG\LegalizeVectorOps.cpp, line 210
The module that triggers this is quite simple; just a constrained vector fadd
followed by an infinite loop:
define fastcc { i8*, { <2 x i64>, <2 x i64> } } @functionDef0(i8*) {
entry:
%1 = call <2 x double> @llvm.experimental.constrained.fadd.v2f64(<2 x double>
<double 0x1, double 0x1>, <2 x double> zeroinitializer, metadata
!"round.tonearest", metadata !"fpexcept.strict")
br label %loopBody
loopBody: ; preds = %loopBody, %entry
br label %loopBody
}</pre>
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