| // Tests that we can reflect optimized out values. |
| // |
| // Unfortunately these tests are brittle. They depend on opaque JIT heuristics |
| // kicking in. |
| |
| load(libdir + "jitopts.js"); |
| |
| if (!jitTogglesMatch(Opts_Ion2NoOffthreadCompilation)) |
| quit(0); |
| |
| withJitOptions(Opts_Ion2NoOffthreadCompilation, function () { |
| var g = newGlobal(); |
| var dbg = new Debugger; |
| |
| // Note that this *depends* on CCW scripted functions being opaque to Ion |
| // optimization and not deoptimizing the frames below the call to toggle. |
| g.toggle = function toggle(d) { |
| if (d) { |
| dbg.addDebuggee(g); |
| var frame = dbg.getNewestFrame(); |
| assertEq(frame.implementation, "ion"); |
| // x is unused and should be elided. |
| assertEq(frame.environment.getVariable("x").optimizedOut, true); |
| assertEq(frame.arguments[1].optimizedOut, true); |
| } |
| }; |
| |
| g.eval("" + function f(d, x) { |
| "use strict"; |
| eval("g(d, x)"); // `eval` to avoid inlining g. |
| }); |
| |
| g.eval("" + function g(d, x) { |
| "use strict"; |
| for (var i = 0; i < 200; i++); |
| toggle(d); |
| }); |
| |
| g.eval("(" + function test() { |
| for (i = 0; i < 5; i++) |
| f(false, 42); |
| f(true, 42); |
| } + ")();"); |
| }); |