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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW " title="NEW --- - Llc crashes if CodeGen/PowerPC/crbit-asm.ll test is compiled with -O1 or -O0" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D23778&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=0DIsVfF2n1uFrj75gx9DQMWfuVAkWT9_VUdqC3QDq0o&s=l0n9ReQ6ZZmrL93W8Qq2IAQksOOwukWqOeLIdsKoFkA&e=">23778</a>
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<th>Summary</th>
<td>Llc crashes if CodeGen/PowerPC/crbit-asm.ll test is compiled with -O1 or -O0
</td>
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<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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Backend: PowerPC
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>llvm.mail.list@gmail.com
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The test relies on availability of the CR bits feature and the
PPC::CRBITRCRegClass register class. CRBITRCRegClass is added when the CR bits
feature is on (see PPCTargetLowering constructor), while the CR bits feature
itself is available for -O2 or greater only (see function computeFSAdditions in
lib/Target/PowerPC/PPCTargetMachine.cpp).
Compiling the CodeGen/PowerPC/crbit-asm.ll test with -O0 or -O1 crashes llc.
Llc tries to copy to a register of type i1, which is illegal if CR bits is off.
This signals the assertion "Copying to an illegal type!" in the getCopyToParts
function (lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp).</pre>
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</p>
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