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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [ARM64] Use of __sincos_stret on non-Darwin platforms."
href="http://llvm.org/bugs/show_bug.cgi?id=19314">19314</a>
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<th>Summary</th>
<td>[ARM64] Use of __sincos_stret on non-Darwin platforms.
</td>
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<th>Product</th>
<td>tools
</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
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>llc
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>mcrosier@codeaurora.org
</td>
</tr>
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<th>CC</th>
<td>apazos@codeaurora.org, bob.wilson@apple.com, grosbach@apple.com, llvmbugs@cs.uiuc.edu, t.p.northover@gmail.com
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>From ARM64ISelLowering.cpp:
-----------------------------------------------------------------------
// For iOS, we don't want to the normal expansion of a libcall to
// sincos. We want to issue a libcall to __sincos_stret to avoid memory
// traffic.
setOperationAction(ISD::FSINCOS, MVT::f64, Custom);
setOperationAction(ISD::FSINCOS, MVT::f32, Custom);
-----------------------------------------------------------------------
This code needs to be conditionalized to accommodate non-Darwin platforms.
This is causing link-time failures for a few SPEC benchmarks when using the
–fno-math-errno flag, which is required for peak performance.
I believe it suffices to just expand these on non-Darwin platforms:
- setOperationAction(ISD::FSINCOS, MVT::f64, Custom);
- setOperationAction(ISD::FSINCOS, MVT::f32, Custom);
+ setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
+ setOperationAction(ISD::FSINCOS, MVT::f32, Expand);</pre>
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