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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 --- - [AVX-512] LLVM ERROR: Cannot select: 0x2821680: v16f32 = X86ISD::FXOR"
href="https://llvm.org/bugs/show_bug.cgi?id=24433">24433</a>
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</tr>
<tr>
<th>Summary</th>
<td>[AVX-512] LLVM ERROR: Cannot select: 0x2821680: v16f32 = X86ISD::FXOR
</td>
</tr>
<tr>
<th>Product</th>
<td>tools
</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>llc
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>anton.mitrokhin@phystech.edu
</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>Here is a small reproducer:
;test.ll:
define void @foo() #0 {
allocas:
%mul_a_load_ = fsub <16 x float> <float -0.000000e+00, float -0.000000e+00,
float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float
-0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00,
float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float
-0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00>,
undef
store <16 x float> %mul_a_load_, <16 x float>* undef, align 64
br label %pl_loop.i.i
pl_loop.i.i: ; preds = %pl_loop.i.i
br label %pl_loop.i.i
}
attributes #0 = { nounwind }
Run with
llc test.ll -mcpu=knl
Output:
LLVM ERROR: Cannot select: 0x2821680: v16f32 = X86ISD::FXOR 0x2820f90,
0x2821558
0x2820f90: v16f32 = undef [ID=1]
0x2821558: v16f32,ch = load 0x27c4c00, 0x28217a8,
0x28211e0<LD64[ConstantPool]
0x28217a8: i64 = X86ISD::Wrapper 0x28210b8 [ID=4]
0x28210b8: i64 = TargetConstantPool<<16 x i32> <i32 -2147483648, i32
-2147
48, i32 -2147483648, i32 -2147483648, i32
-2147483648>> 0 [ID=3]
0x28211e0: i64 = undef [ID=2]
In function: foo</pre>
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</p>
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