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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [PPC] Suboptimal code generated for integer load followed by conversion to floating point"
href="https://llvm.org/bugs/show_bug.cgi?id=27204">27204</a>
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<th>Summary</th>
<td>[PPC] Suboptimal code generated for integer load followed by conversion to floating point
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>Other
</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>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>amehsan@ca.ibm.com
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</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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</tr></table>
<p>
<div>
<pre>This is going to be a bug after I commit this patch:
<a href="http://reviews.llvm.org/D18405">http://reviews.llvm.org/D18405</a>
I open it to make sure it won't be forgotten.
For this example:
float test (int *arr) {
return arr[2];
}
After submission of the above patch we will generate the following code:
0: 08 00 80 38 li r4,8
4: 98 20 03 7c lxsiwax vs0,r3,r4
8: e0 04 20 f0 xscvsxdsp vs1,vs0
c: 20 00 80 4e blr
We need to generate the code below which has lower register pressure
0: 08 00 63 38 addi r3,r3,8
4: ae 1e 20 7c lfiwax f1,0,r3
8: 9c 0e 20 ec fcfids f1,f1
c: 20 00 80 4e blr</pre>
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</p>
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