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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 --- - Unable to lower ISD::INSERT_VECTOR on Power9"
href="https://llvm.org/bugs/show_bug.cgi?id=30189">30189</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Unable to lower ISD::INSERT_VECTOR on Power9
</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>nemanja.i.ibm@gmail.com
</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>When I implemented the XXINSERTW instruction, I forgot to account for the
possibility that the index for the insertion may be variable. Currently, we
crash on the following input:
$ cat t.c
vector float test(vector float v, float f, int el) {
v[el] = f;
return v;
}
$ clang -O2 -mcpu=pwr9 t.c -faltivec -S
fatal error: error in backend: Cannot select: t11: v4f32 = insert_vector_elt
t2, t4, t8
t2: v4f32,ch = CopyFromReg t0, Register:v4f32 %vreg0
t1: v4f32 = Register %vreg0
t4: f32,ch = CopyFromReg t0, Register:f32 %vreg1
t3: f32 = Register %vreg1
t8: i64 = AssertSext t6, ValueType:ch:i32
t6: i64,ch = CopyFromReg t0, Register:i64 %vreg2
t5: i64 = Register %vreg2
In function: test
clang-3.9: error: clang frontend command failed with exit code 70 (use -v to
see invocation)
clang version 4.0.0 (trunk 278682) (llvm/trunk 278681)
Target: powerpc64le-unknown-linux-gnu
A patch that fixes this will follow in a comment.</pre>
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