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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - PowerPC64: fast isel creates bad constant"
href="https://llvm.org/bugs/show_bug.cgi?id=26356">26356</a>
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<th>Summary</th>
<td>PowerPC64: fast isel creates bad constant
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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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>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: PowerPC
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>anton@samba.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The following testcase:
target datalayout = "e-m:e-i64:64-n32:64"
target triple = "powerpc64le-unknown-linux-gnu"
; Function Attrs: nounwind
define internal zeroext i16 @zot() #0 {
ret i16 32768
}
Creates an incorrect negative constant when built with -fast-isel:
# llc -O1 -fast-isel x.ll
...
zot:
li 3, -32768
blr
Without -fast-isel, we get the correct unsigned constant:
# llc -O1 x.ll
...
zot:
li 3, 0
ori 3, 3, 32768
blr</pre>
</div>
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