JIT: Bad result with shifts on arm32/x86

[jakobbotsch]

// Generated by Fuzzlyn v2.5 on 2025-03-13 05:07:24
// Run on X86 Windows
// Seed: 328815593975947281-vectort,vector128,vector256,x86aes,x86avx,x86avx2,x86avx512bw,x86avx512bwvl,x86avx512cd,x86avx512cdvl,x86avx512dq,x86avx512dqvl,x86avx512f,x86avx512fvl,x86bmi1,x86bmi2,x86fma,x86lzcnt,x86pclmulqdq,x86popcnt,x86sse,x86sse2,x86sse3,x86sse41,x86sse42,x86ssse3,x86x86base
// Reduced from 155.8 KiB to 0.4 KiB in 00:03:59
// Debug: Outputs 0
// Release: Outputs 1
using System;
using System.Numerics;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;

public class C0
{
    public ulong F9;
}

public class Program
{
    public static C0 s_1 = new C0();
    public static int s_18 = 1;
    public static void Main()
    {
        var vr1 = (short)(s_1.F9 << -1) >> s_18;
        System.Console.WriteLine(vr1);
    }
}

cc @dotnet/jit-contrib

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[jakobbotsch]

Bisected to #113301