Test cases on v8

test_v8.js

// run with : 
// node --trace_deopt --allow-natives-syntax FILENAME

function adder(a, b) {
    return new Function('a', 'b', 'return b%2 ? a + b : b%3 ? a - b : b%5 ? b / a : a * b')(a, b);
}
function addereval(a, b) {
    return eval('b%2 ? a + b : b%3 ? a - b : b%5 ? b / a : a * b');
}

function printStatus(fn) {
    var status = %GetOptimizationStatus(fn)
    switch (status) {
        case 1: console.log(fn.name, "function is optimized"); break;
        case 2: console.log(fn.name, "function is not optimized"); break;
        case 3: console.log(fn.name, "function is always optimized"); break;
        case 4: console.log(fn.name, "function is never optimized"); break;
        case 6: console.log(fn.name, "function is maybe deoptimized"); break;
        case 7: console.log(fn.name,"Function is optimized by TurboFan"); break;
        default: console.log(fn.name, "Unknown optimization status: ", status); break;
    }
}
printStatus(adder);
printStatus(addereval);


for(let i = 0; i < 263; i++) {
	adder(1, 2);
}
console.log('\n', '==== adder after invocation ===');
printStatus(adder);

addereval(1, 2);
console.log('\n', '==== addereval after invocation ===');
printStatus(addereval);



/*
tested on windows7 with node v8.2.1 (v8 version 5.8.283.41) And 
linux ubuntu with node v8.7.0(v8 version 6.1.534.42) :

output values:
--------------
adder function is optimized
addereval function is optimized

 ==== adder after invocation ===
adder Unknown optimization status:  17 (STATUS IS 65 ON NODE V8.7.0)

 ==== addereval after invocation ===
addereval Unknown optimization status:  65
*/