src/v8/test/mjsunit/regress/regress-deopt-store-effect.js

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// Flags: --allow-natives-syntax

// Test deopt after generic store with effect context.
var pro = { x : 1 }
var a = {}
a.__proto__ = pro
delete pro.x

function g(o) {
  return 7 + (o.z = 1, 20);
}

g(a);
g(a);
%OptimizeFunctionOnNextCall(g);
Object.defineProperty(pro, "z", {
    set: function(v) { %DeoptimizeFunction(g); },
    get: function() { return 20; }
});

assertEquals(27, g(a));

// Test deopt after polymorphic as monomorphic store with effect context.

var i = { z : 2, r : 1 }
var j = { z : 2 }
var p = { a : 10 }
var pp = { a : 20, b : 1 }

function bar(o, p) {
  return 7 + (o.z = 1, p.a);
}

bar(i, p);
bar(i, p);
bar(j, p);
%OptimizeFunctionOnNextCall(bar);
assertEquals(27, bar(i, pp));

// Test deopt after polymorphic store with effect context.

var i = { r : 1, z : 2 }
var j = { z : 2 }
var p = { a : 10 }
var pp = { a : 20, b : 1 }

function bar1(o, p) {
  return 7 + (o.z = 1, p.a);
}

bar1(i, p);
bar1(i, p);
bar1(j, p);
%OptimizeFunctionOnNextCall(bar1);
assertEquals(27, bar1(i, pp));