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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Improve generic expansion of expandload and compressstore intrinsics"
href="https://bugs.llvm.org/show_bug.cgi?id=39666">39666</a>
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<th>Summary</th>
<td>Improve generic expansion of expandload and compressstore intrinsics
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: X86
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>llvm-dev@redking.me.uk
</td>
</tr>
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<th>CC</th>
<td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, spatel+llvm@rotateright.com
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<pre>These generic intrinsics fail without a legal lowering.
define <2 x i64> @test5(i64* %base, <2 x i64> %src0) {
%res = call <2 x i64> @llvm.masked.expandload.v2i64(i64* %base, <2 x i1> <i1
false, i1 true>, <2 x i64> %src0)
ret <2 x i64>%res
}
declare <2 x i64> @llvm.masked.expandload.v2i64(i64*, <2 x i1>, <2 x i64>)
define void @test11(i64* %base, <2 x i64> %V, <2 x i1> %mask) {
call void @llvm.masked.compressstore.v2i64(<2 x i64> %V, i64* %base, <2 x i1>
%mask)
ret void
}
declare void @llvm.masked.compressstore.v2i64(<2 x i64>, i64* , <2 x i1>)
llc -mcpu=btver2
LLVM ERROR: Cannot select: 0x557bba23b478: v2i64,ch = masked_load<(load 16 from
%ir.base)> 0x557bba1c8b68, 0x557bba23b208, 0x557bba23b6e8, 0x557bba23b2d8
0x557bba23b208: i64,ch = CopyFromReg 0x557bba1c8b68, Register:i64 %0
0x557bba23b1a0: i64 = Register %0
0x557bba23b6e8: v2i64 = bitcast 0x557bba23b680
0x557bba23b680: v16i8 = X86ISD::VSHLDQ 0x557bba23b3a8, Constant:i8<8>
0x557bba23b3a8: v16i8 = bitcast 0x557bba23b340
0x557bba23b340: v2i64 = scalar_to_vector Constant:i64<-1>
0x557bba23b888: i64 = Constant<-1>
0x557bba23b410: i8 = Constant<8>
0x557bba23b2d8: v2i64,ch = CopyFromReg 0x557bba1c8b68, Register:v2i64 %1
0x557bba23b270: v2i64 = Register %1
In function: test5</pre>
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