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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - Turning on gcc's optimizations halves the run-time of the gas_dyn and induct polyhedron benchmarks"
href="http://llvm.org/bugs/show_bug.cgi?id=16193">16193</a>
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<th>Summary</th>
<td>Turning on gcc's optimizations halves the run-time of the gas_dyn and induct polyhedron benchmarks
</td>
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<th>Product</th>
<td>dragonegg
</td>
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<th>Version</th>
<td>3.2
</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>ASSIGNED
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>New Bugs
</td>
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<th>Assignee</th>
<td>baldrick@free.fr
</td>
</tr>
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<th>Reporter</th>
<td>baldrick@free.fr
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>gcc-4.8 + LLVM 3.3 dragonegg plugin, -ffast-math -funroll-loops -O3,
x86_apple-darwin12, numbers by Jack Howarth.
gas_dyn runtimes:
LLVM optimizations only: 7.94
LLVM+GCC optimizations: 4.20
Just GCC, no LLVM: 3.59
induct runtimes:
LLVM optimizations only: 24.04
LLVM+GCC optimizations: 11.85
Just GCC, no LLVM: 12.21
The GCC mid-level optimizers are doing something good here, halving the
run-time.</pre>
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