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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - vector IR (insertelement/shufflevector) fails to select for wasm32 with -mattr=+simd128"
href="https://bugs.llvm.org/show_bug.cgi?id=38519">38519</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>vector IR (insertelement/shufflevector) fails to select for wasm32 with -mattr=+simd128
</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>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Backend: WebAssembly
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>gonzalobg88@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>define hidden void @i8x16_splat(<1 x i128>*, i8 %v) {
start:
%_3.0.vec.insert.i = insertelement <16 x i8> undef, i8 %v, i32 0
%_3.15.vec.insert.i = shufflevector <16 x i8> %_3.0.vec.insert.i, <16 x i8>
undef, <16 x i32> zeroinitializer
%1 = bitcast <16 x i8> %_3.15.vec.insert.i to i128
%_2.sroa.0.0.vec.insert.i = insertelement <1 x i128> undef, i128 %1, i32 0
store <1 x i128> %_2.sroa.0.0.vec.insert.i, <1 x i128>* %0, align 16
ret void
}
compiles fine with `llc -march=wasm32` but produces the following error with
`llc -march=wasm32 -mattr=+simd128` (<a href="https://godbolt.org/g/X5dqST">https://godbolt.org/g/X5dqST</a>):
LLVM ERROR: Cannot select: 0x5569fcdf5790: ch = store<(store 16 into %ir.0)>
0x5569fcdb6408, 0x5569fcdf55f0, 0x5569fcdf53e8, undef:i32
0x5569fcdf55f0: v16i8 = BUILD_VECTOR 0x5569fcdf54b8, 0x5569fcdf54b8,
0x5569fcdf54b8, 0x5569fcdf54b8, 0x5569fcdf54b8, 0x5569fcdf54b8, 0x5569fcdf54b8,
0x5569fcdf54b8, 0x5569fcdf54b8, 0x5569fcdf54b8, 0x5569fcdf54b8, 0x5569fcdf54b8,
0x5569fcdf54b8, 0x5569fcdf54b8, 0x5569fcdf54b8, 0x5569fcdf54b8
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf54b8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<1>
0x5569fcdf5450: i32 = TargetConstant<1>
0x5569fcdf53e8: i32 = WebAssemblyISD::ARGUMENT TargetConstant:i32<0>
0x5569fcdf5380: i32 = TargetConstant<0>
0x5569fcdf5860: i32 = undef
In function: i8x16_splat
Compiler returned: 1</pre>
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