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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [PowerPC] POWER9 vector constant generation issue"
href="https://llvm.org/bugs/show_bug.cgi?id=31340">31340</a>
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<tr>
<th>Summary</th>
<td>[PowerPC] POWER9 vector constant generation issue
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Backend: PowerPC
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>anton@samba.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The following test case:
int a, b, c;
void d(void) {
for (; c; c++) {
char *e = (char *)&a;
*e |= 200;
b ^= 0 == 0;
}
}
built with the following options:
# clang -O2 -mcpu=power9
fails with:
fatal error: error in backend: Cannot select: 0x1001d4faa98: v16i8 =
BUILD_VECTOR Constant:i32<200>, Constant:i32<200>, Constant:i32<200>,
Constant:i32<200>, Constant:i32<200>, Constant:i32<200>, Constant:i32<200>,
Constant:i32<200>, Constant:i32<200>, Constant:i32<200>,
Constant:i32<200>, Constant:i32<200>, Constant:i32<200>, Constant:i32<200>,
Constant:i32<200>, Constant:i32<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200>
0x1001d4fd6f0: i32 = Constant<200></pre>
</div>
</p>
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