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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - surfaceArea.cc from xplor-nih compiles ~30 times to slowly using -O1/-O2/-O3 -funroll-loops -fplugin-arg-dragonegg-llvm-option=-vectorize"
href="http://llvm.org/bugs/show_bug.cgi?id=15287">15287</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>surfaceArea.cc from xplor-nih compiles ~30 times to slowly using -O1/-O2/-O3 -funroll-loops -fplugin-arg-dragonegg-llvm-option=-vectorize
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>Macintosh
</td>
</tr>
<tr>
<th>OS</th>
<td>MacOS X
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>howarth@nitro.med.uc.edu
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The largest remaining vectorization bottleneck in compiling xplor-nih with
-fplugin-arg-dragonegg-llvm-option=-vectorize is in the compilation of
intVar/surfaceArea.cc...
% time de-g++47 -c surfaceArea.cc -O1 -funroll-loops
-fplugin-arg-dragonegg-llvm-option=-vectorize -DX_MMAP_FLAGS=0 -DFORTRAN_INIT
-fno-common -DDARWIN -D_REENTRANT -DNDEBUG
-I/Users/howarth/xplor-nih-2.33/nmrPot/
-I/Users/howarth/xplor-nih-2.33/arch/Darwin_12_x86_64/include
-I/Users/howarth/xplor-nih-2.33/CDSlib -I/Users/howarth/xplor-nih-2.33/common
-I/Users/howarth/xplor-nih-2.33/intVar -I/Users/howarth/xplor-nih-2.33/fortlib
-I/Users/howarth/xplor-nih-2.33/surfD -I/Users/howarth/xplor-nih-2.33
-DCPLUSPLUS -DUSE_CDS_NAMESPACE -I/Users/howarth/xplor-nih-2.33/nmrPot/
-I/Users/howarth/xplor-nih-2.33/arch/Darwin_12_x86_64/include
...
60.843u 0.130s 1:00.98 99.9% 0+0k 0+13io 0pf+0w
% time de-g++47 -c surfaceArea.cc -O1 -funroll-loops -DX_MMAP_FLAGS=0
-DFORTRAN_INIT -fno-common -DDARWIN -D_REENTRANT -DNDEBUG
-I/Users/howarth/xplor-nih-2.33/nmrPot/
-I/Users/howarth/xplor-nih-2.33/arch/Darwin_12_x86_64/include
-I/Users/howarth/xplor-nih-2.33/CDSlib -I/Users/howarth/xplor-nih-2.33/common
-I/Users/howarth/xplor-nih-2.33/intVar -I/Users/howarth/xplor-nih-2.33/fortlib
-I/Users/howarth/xplor-nih-2.33/surfD -I/Users/howarth/xplor-nih-2.33
-DCPLUSPLUS -DUSE_CDS_NAMESPACE -I/Users/howarth/xplor-nih-2.33/nmrPot/
-I/Users/howarth/xplor-nih-2.33/arch/Darwin_12_x86_64/include
...
2.091u 0.120s 0:02.21 100.0% 0+0k 0+3io 0pf+0w
The non-vectorized LLVM IR generated with...
de-g++47 -c surfaceArea.cc -O1 -funroll-loops -DX_MMAP_FLAGS=0 -DFORTRAN_INIT
-fno-common -DDARWIN -D_REENTRANT -DNDEBUG
-I/Users/howarth/xplor-nih-2.33/nmrPot/
-I/Users/howarth/xplor-nih-2.33/arch/Darwin_12_x86_64/include
-I/Users/howarth/xplor-nih-2.33/CDSlib -I/Users/howarth/xplor-nih-2.33/common
-I/Users/howarth/xplor-nih-2.33/intVar -I/Users/howarth/xplor-nih-2.33/fortlib
-I/Users/howarth/xplor-nih-2.33/surfD -I/Users/howarth/xplor-nih-2.33
-DCPLUSPLUS -DUSE_CDS_NAMESPACE -I/Users/howarth/xplor-nih-2.33/nmrPot/
-I/Users/howarth/xplor-nih-2.33/arch/Darwin_12_x86_64/include
-fplugin-arg-dragonegg-emit-ir -S
is attached as surfaceArea.s and can be used to reproduce this problem as
follows...
% time /sw/opt/llvm-3.3/bin/opt -O1 -vectorize surfaceArea.s
...
30.187u 0.048s 0:30.53 98.9% 0+0k 0+0io 950pf+0w
% time /sw/opt/llvm-3.3/bin/opt -O1 surfaceArea.s
...
0.621u 0.011s 0:00.63 100.0% 0+0k 0+0io 0pf+0w</pre>
</div>
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