sharplabTest.cs

using System;
public class C {
    int x=5;
    
    public void check() {
        if( x > 20) x=6;
    }
}

​sharplabTest.jit.asm

; Core CLR v5.0.421.11614 on amd64

C..ctor()
    L0000: mov dword ptr [rcx+8], 5
    L0007: ret

C.check()
    L0000: cmp dword ptr [rcx+8], 0x14
    L0004: jle short L000d
    L0006: mov dword ptr [rcx+8], 6
    L000d: ret

​​.sharplab.json

{
    "version": 1,
    "target": "JIT ASM",
    "mode": "Release",
    "branch": "core-x64"
}