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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - AArch64/ARM64: Investigate AArch64/ARM64 ideas of fastcc"
href="http://llvm.org/bugs/show_bug.cgi?id=19426">19426</a>
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<th>Summary</th>
<td>AArch64/ARM64: Investigate AArch64/ARM64 ideas of fastcc
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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>All
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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>Backend: AArch64
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>t.p.northover@gmail.com
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>AArch64 seems to implement a much more aggressive fastcc than ARM64 which
allows tail call optimisations to be applied in more circumstances.
We need to sort out what the best behaviour here is (including whether anyone
is actually using fastcc and relying on some particular behaviour).
Seems like it could be a fairly long task, so I'm filing this as a separate
issue.</pre>
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</p>
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