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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - ARM FastISel emits wrong code when omitting frame pointers and the frames are huge"
href="http://llvm.org/bugs/show_bug.cgi?id=16322">16322</a>
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<th>Summary</th>
<td>ARM FastISel emits wrong code when omitting frame pointers and the frames are huge
</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>All
</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>Backend: ARM
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>jfb@google.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>lib/Target/ARM/ARMFastISel.cpp:ARM::createFastISel has the following code:
// iOS always has a FP for backtracking, force other targets
// to keep their FP when doing FastISel. The emitted code is
// currently superior, and in cases like test-suite's lencod
// FastISel isn't quite correct when FP is eliminated.
TM.Options.NoFramePointerElim = true;
FastISel should be able to omit frame pointers with correct code that performs
well. It currently falls short on both accounts.</pre>
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