michael@0: 
michael@0: function f(x) {
michael@0:     return x + 1;
michael@0: }
michael@0: 
michael@0: setJitCompilerOption("ion.usecount.trigger", 2);
michael@0: setJitCompilerOption("baseline.usecount.trigger", 0);
michael@0: 
michael@0: assertEq(f(1), 2);     // usecount == 1 => eagerly compile with baseline.
michael@0: assertEq(f(0.5), 1.5); // usecount == 2 => normaly compile with ion.
michael@0:                        //                  invalidate for unexpect output.
michael@0: 
michael@0: 
michael@0: function normal() {
michael@0:     setJitCompilerOption("ion.usecount.trigger", 8);
michael@0:     setJitCompilerOption("baseline.usecount.trigger", 5);
michael@0: }
michael@0: 
michael@0: function eager() {
michael@0:     setJitCompilerOption("ion.usecount.trigger", 0);
michael@0: }
michael@0: 
michael@0: function h(x) {
michael@0:     return x + 1;
michael@0: }
michael@0: 
michael@0: function g(x) {
michael@0:     normal();
michael@0:     return h(x) + 1;
michael@0: }
michael@0: 
michael@0: normal();
michael@0: for (var i = 0; i < 10; i++) {
michael@0:     eager();
michael@0:     assertEq(g(i), i + 2);
michael@0: }
michael@0: 
michael@0: 
michael@0: // Check for wrong arguments.
michael@0: try {
michael@0:     setJitCompilerOption("not.an.option", 51);
michael@0:     assertEq(false, true);
michael@0: } catch (x) { }
michael@0: 
michael@0: try {
michael@0:     var ion = { usecount: { trigger: null } };
michael@0:     setJitCompilerOption(ion.usecount.trigger, 42);
michael@0:     assertEq(false, true);
michael@0: } catch (x) { }
michael@0: 
michael@0: try {
michael@0:     setJitCompilerOption("ion.usecount.trigger", "32");
michael@0:     assertEq(false, true);
michael@0: } catch (x) { }