Bad codegen when EVEX embedded broadcast is combined with embedded masking on some bitwise instructions #117794
Description
Example:
using System;
using System.Runtime.Intrinsics;
using System.Runtime.CompilerServices;
[MethodImpl(MethodImplOptions.NoInlining)]
static Vector128<uint> BadAnd(Vector128<ulong> v, Vector128<uint> w) =>
Vector128.ConditionalSelect(
Vector128.GreaterThan(w, Vector128<uint>.Zero),
(v & Vector128<uint>.One.AsUInt64()).AsUInt32(),
Vector128<uint>.Zero
);
Console.WriteLine(BadAnd(Vector128<ulong>.AllBitsSet, Vector128.Create(0u, 0, 2, 2)));Output on net9.0
<0, 0, 1, 1>
Output on main
<0, 0, 0, 0>
Codegen for BadAnd
vmovups xmm0, xmmword ptr [r8]
vxorps xmm1, xmm1, xmm1
vpcmpud k1, xmm0, xmm1, 6
vmovups xmm0, xmmword ptr [rdx]
vpandq xmm0 {k1}{z}, xmm0, qword ptr [reloc @RWD00] {1to2} ; bad mask size
vmovups xmmword ptr [rcx], xmm0