reduce_vars: { options = { conditionals : true, evaluate : true, global_defs : { C : 0 }, reduce_vars : true, toplevel : true, unused : true } input: { var A = 1; (function f0() { var a = 2; console.log(a - 5); console.log(A - 5); })(); (function f1() { var a = 2; console.log(a - 5); eval("console.log(a);"); })(); (function f2(eval) { var a = 2; console.log(a - 5); eval("console.log(a);"); })(eval); (function f3() { var b = typeof C !== "undefined"; var c = 4; if (b) { return 'yes'; } else { return 'no'; } })(); console.log(A + 1); } expect: { var A = 1; (function() { console.log(-3); console.log(-4); })(); (function f1() { var a = 2; console.log(-3); eval("console.log(a);"); })(); (function f2(eval) { var a = 2; console.log(-3); eval("console.log(a);"); })(eval); (function() { return "yes"; })(); console.log(2); } expect_stdout: true } modified: { options = { conditionals : true, evaluate : true, reduce_vars : true, unused : true } input: { function f0() { var a = 1, b = 2; b++; console.log(a + 1); console.log(b + 1); } function f1() { var a = 1, b = 2; --b; console.log(a + 1); console.log(b + 1); } function f2() { var a = 1, b = 2, c = 3; b = c; console.log(a + b); console.log(b + c); console.log(a + c); console.log(a + b + c); } function f3() { var a = 1, b = 2, c = 3; b *= c; console.log(a + b); console.log(b + c); console.log(a + c); console.log(a + b + c); } function f4() { var a = 1, b = 2, c = 3; if (a) { b = c; } else { c = b; } console.log(a + b); console.log(b + c); console.log(a + c); console.log(a + b + c); } function f5(a) { B = a; console.log(A ? 'yes' : 'no'); console.log(B ? 'yes' : 'no'); } } expect: { function f0() { var b = 2; b++; console.log(2); console.log(b + 1); } function f1() { var b = 2; --b; console.log(2); console.log(b + 1); } function f2() { var b = 2; b = 3; console.log(1 + b); console.log(b + 3); console.log(4); console.log(1 + b + 3); } function f3() { var b = 2; b *= 3; console.log(1 + b); console.log(b + 3); console.log(4); console.log(1 + b + 3); } function f4() { var b = 2, c = 3; b = c; console.log(1 + b); console.log(b + c); console.log(1 + c); console.log(1 + b + c); } function f5(a) { B = a; console.log(A ? 'yes' : 'no'); console.log(B ? 'yes' : 'no'); } } } unsafe_evaluate: { options = { evaluate : true, reduce_vars : true, unsafe : true, unused : true } input: { function f0(){ var a = { b:1 }; console.log(a.b + 3); } function f1(){ var a = { b:{ c:1 }, d:2 }; console.log(a.b + 3, a.d + 4, a.b.c + 5, a.d.c + 6); } } expect: { function f0(){ console.log(4); } function f1(){ var a = { b:{ c:1 }, d:2 }; console.log(a.b + 3, 6, 6, 2..c + 6); } } } unsafe_evaluate_object: { options = { evaluate : true, reduce_vars : true, unsafe : true } input: { function f0(){ var a = 1; var b = {}; b[a] = 2; console.log(a + 3); } function f1(){ var a = { b:1 }; a.b = 2; console.log(a.b + 3); } } expect: { function f0(){ var a = 1; var b = {}; b[1] = 2; console.log(4); } function f1(){ var a = { b:1 }; a.b = 2; console.log(a.b + 3); } } } unsafe_evaluate_array: { options = { evaluate : true, reduce_vars : true, unsafe : true } input: { function f0(){ var a = 1; var b = []; b[a] = 2; console.log(a + 3); } function f1(){ var a = [1]; a[2] = 3; console.log(a.length); } function f2(){ var a = [1]; a.push(2); console.log(a.length); } } expect: { function f0(){ var a = 1; var b = []; b[1] = 2; console.log(4); } function f1(){ var a = [1]; a[2] = 3; console.log(a.length); } function f2(){ var a = [1]; a.push(2); console.log(a.length); } } } unsafe_evaluate_equality: { options = { evaluate : true, reduce_vars : true, unsafe : true, unused : true } input: { function f0(){ var a = {}; console.log(a === a); } function f1(){ var a = []; console.log(a === a); } function f2(){ var a = {a:1, b:2}; var b = a; var c = a; console.log(b === c); } function f3(){ var a = [1, 2, 3]; var b = a; var c = a; console.log(b === c); } } expect: { function f0(){ console.log(true); } function f1(){ console.log(true); } function f2(){ console.log(true); } function f3(){ console.log(true); } } } passes: { options = { conditionals: true, evaluate: true, passes: 2, reduce_vars: true, unused: true, } input: { function f() { var a = 1, b = 2, c = 3; if (a) { b = c; } else { c = b; } console.log(a + b); console.log(b + c); console.log(a + c); console.log(a + b + c); } } expect: { function f() { var b = 2; b = 3; console.log(1 + b); console.log(b + 3); console.log(4); console.log(1 + b + 3); } } } iife: { options = { evaluate: true, reduce_vars: true, } input: { !function(a, b, c) { b++; console.log(a - 1, b * 1, c + 2); }(1, 2, 3); } expect: { !function(a, b, c) { b++; console.log(0, 1 * b, 5); }(1, 2, 3); } expect_stdout: true } iife_new: { options = { evaluate: true, reduce_vars: true, } input: { var A = new function(a, b, c) { b++; console.log(a - 1, b * 1, c + 2); }(1, 2, 3); } expect: { var A = new function(a, b, c) { b++; console.log(0, 1 * b, 5); }(1, 2, 3); } expect_stdout: true } multi_def: { options = { evaluate: true, reduce_vars: true, } input: { function f(a) { if (a) var b = 1; else var b = 2 console.log(b + 1); } } expect: { function f(a) { if (a) var b = 1; else var b = 2 console.log(b + 1); } } } multi_def_2: { options = { evaluate: true, reduce_vars: true, } input: { function f(){ if (code == 16) var bitsLength = 2, bitsOffset = 3, what = len; else if (code == 17) var bitsLength = 3, bitsOffset = 3, what = (len = 0); else if (code == 18) var bitsLength = 7, bitsOffset = 11, what = (len = 0); var repeatLength = this.getBits(bitsLength) + bitsOffset; } } expect: { function f(){ if (16 == code) var bitsLength = 2, bitsOffset = 3, what = len; else if (17 == code) var bitsLength = 3, bitsOffset = 3, what = (len = 0); else if (18 == code) var bitsLength = 7, bitsOffset = 11, what = (len = 0); var repeatLength = this.getBits(bitsLength) + bitsOffset; } } } use_before_var: { options = { evaluate: true, reduce_vars: true, } input: { function f(){ console.log(t); var t = 1; } } expect: { function f(){ console.log(t); var t = 1; } } } inner_var_if: { options = { evaluate: true, reduce_vars: true, } input: { function f(a){ if (a) var t = 1; if (!t) console.log(t); } } expect: { function f(a){ if (a) var t = 1; if (!t) console.log(t); } } } inner_var_label: { options = { evaluate: true, reduce_vars: true, } input: { function f(a){ l: { if (a) break l; var t = 1; } console.log(t); } } expect: { function f(a){ l: { if (a) break l; var t = 1; } console.log(t); } } } inner_var_for: { options = { evaluate: true, reduce_vars: true, } input: { function f() { var a = 1; x(a, b, d); for (var b = 2, c = 3; x(a, b, c, d); x(a, b, c, d)) { var d = 4, e = 5; x(a, b, c, d, e); } x(a, b, c, d, e); } } expect: { function f() { var a = 1; x(1, b, d); for (var b = 2, c = 3; x(1, b, 3, d); x(1, b, 3, d)) { var d = 4, e = 5; x(1, b, 3, d, e); } x(1, b, 3, d, e); } } } inner_var_for_in_1: { options = { evaluate: true, reduce_vars: true, } input: { function f() { var a = 1, b = 2; for (b in (function() { return x(a, b, c); })()) { var c = 3, d = 4; x(a, b, c, d); } x(a, b, c, d); } } expect: { function f() { var a = 1, b = 2; for (b in (function() { return x(1, b, c); })()) { var c = 3, d = 4; x(1, b, c, d); } x(1, b, c, d); } } } inner_var_for_in_2: { options = { evaluate: true, reduce_vars: true, } input: { function f() { for (var long_name in {}) console.log(long_name); } } expect: { function f() { for (var long_name in {}) console.log(long_name); } } } inner_var_catch: { options = { evaluate: true, reduce_vars: true, } input: { function f() { try { a(); } catch (e) { var b = 1; } console.log(b); } } expect: { function f() { try { a(); } catch (e) { var b = 1; } console.log(b); } } } issue_1533_1: { options = { collapse_vars: true, reduce_vars: true, } input: { function f() { var id = ""; for (id in {break: "me"}) console.log(id); } } expect: { function f() { var id = ""; for (id in {break: "me"}) console.log(id); } } } issue_1533_2: { options = { evaluate: true, reduce_vars: true, } input: { function f() { var id = ""; for (var id in {break: "me"}) console.log(id); console.log(id); } } expect: { function f() { var id = ""; for (var id in {break: "me"}) console.log(id); console.log(id); } } } toplevel_on: { options = { evaluate: true, reduce_vars: true, toplevel:true, unused: true, } input: { var x = 3; console.log(x); } expect: { console.log(3); } expect_stdout: true } toplevel_off: { options = { evaluate: true, reduce_vars: true, toplevel:false, unused: true, } input: { var x = 3; console.log(x); } expect: { var x = 3; console.log(x); } expect_stdout: true } toplevel_on_loops_1: { options = { evaluate: true, loops: true, reduce_vars: true, toplevel:true, unused: true, } input: { function bar() { console.log("bar:", --x); } var x = 3; do bar(); while (x); } expect: { var x = 3; do (function() { console.log("bar:", --x); })(); while (x); } expect_stdout: true } toplevel_off_loops_1: { options = { evaluate: true, loops: true, reduce_vars: true, toplevel:false, unused: true, } input: { function bar() { console.log("bar:", --x); } var x = 3; do bar(); while (x); } expect: { function bar() { console.log("bar:", --x); } var x = 3; do bar(); while (x); } expect_stdout: true } toplevel_on_loops_2: { options = { evaluate: true, loops: true, reduce_vars: true, toplevel:true, unused: true, } input: { function bar() { console.log("bar:"); } var x = 3; do bar(); while (x); } expect: { for (;;) (function() { console.log("bar:"); })(); } } toplevel_off_loops_2: { options = { evaluate: true, loops: true, reduce_vars: true, toplevel:false, unused: true, } input: { function bar() { console.log("bar:"); } var x = 3; do bar(); while (x); } expect: { function bar() { console.log("bar:"); } var x = 3; do bar(); while (x); } } toplevel_on_loops_3: { options = { evaluate: true, loops: true, reduce_vars: true, toplevel:true, unused: true, } input: { var x = 3; while (x) bar(); } expect: { for (;;) bar(); } } toplevel_off_loops_3: { options = { evaluate: true, loops: true, reduce_vars: true, toplevel:false, unused: true, } input: { var x = 3; while (x) bar(); } expect: { var x = 3; for (;x;) bar(); } } defun_reference: { options = { evaluate: true, reduce_vars: true, } input: { function f() { function g() { x(); return a; } var a = h(); var b = 2; return a + b; function h() { y(); return b; } } } expect: { function f() { function g() { x(); return a; } var a = h(); var b = 2; return a + b; function h() { y(); return b; } } } } defun_inline_1: { options = { reduce_vars: true, unused: true, } input: { function f() { return g(2) + h(); function g(b) { return b; } function h() { return h(); } } } expect: { function f() { return function(b) { return b; }(2) + h(); function h() { return h(); } } } } defun_inline_2: { options = { reduce_vars: true, unused: true, } input: { function f() { function g(b) { return b; } function h() { return h(); } return g(2) + h(); } } expect: { function f() { function h() { return h(); } return function(b) { return b; }(2) + h(); } } } defun_inline_3: { options = { evaluate: true, passes: 2, reduce_vars: true, side_effects: true, unused: true, } input: { function f() { return g(2); function g(b) { return b; } } } expect: { function f() { return 2; } } } defun_call: { options = { reduce_vars: true, unused: true, } input: { function f() { return g() + h(1) - h(g(), 2, 3); function g() { return 4; } function h(a) { return a; } } } expect: { function f() { return 4 + h(1) - h(4); function h(a) { return a; } } } } defun_redefine: { options = { reduce_vars: true, unused: true, } input: { function f() { function g() { return 1; } function h() { return 2; } g = function() { return 3; }; return g() + h(); } } expect: { function f() { function g() { return 1; } g = function() { return 3; }; return g() + 2; } } } func_inline: { options = { reduce_vars: true, unused: true, } input: { function f() { var g = function() { return 1; }; console.log(g() + h()); var h = function() { return 2; }; } } expect: { function f() { console.log(1 + h()); var h = function() { return 2; }; } } } func_modified: { options = { reduce_vars: true, unused: true, } input: { function f(a) { function a() { return 1; } function b() { return 2; } function c() { return 3; } b.inject = []; c = function() { return 4; }; return a() + b() + c(); } } expect: { function f(a) { function b() { return 2; } function c() { return 3; } b.inject = []; c = function() { return 4; }; return 1 + 2 + c(); } } } defun_label: { options = { passes: 2, reduce_vars: true, unused: true, } input: { !function() { function f(a) { L: { if (a) break L; return 1; } } console.log(f(2)); }(); } expect: { !function() { console.log(function(a) { L: { if (a) break L; return 1; } }(2)); }(); } expect_stdout: true } double_reference: { options = { reduce_vars: true, unused: true, } input: { function f() { var g = function g() { g(); }; g(); } } expect: { function f() { (function g() { g(); })(); } } } iife_arguments_1: { options = { reduce_vars: true, unused: true, } input: { (function(x) { console.log(x() === arguments[0]); })(function f() { return f; }); } expect: { (function(x) { console.log(x() === arguments[0]); })(function f() { return f; }); } expect_stdout: true } iife_arguments_2: { options = { reduce_vars: true, unused: true, } input: { (function() { var x = function f() { return f; }; console.log(x() === arguments[0]); })(); } expect: { (function() { console.log(function f() { return f; }() === arguments[0]); })(); } expect_stdout: true } iife_eval_1: { options = { reduce_vars: true, unused: true, } input: { (function(x) { console.log(x() === eval("x")); })(function f() { return f; }); } expect: { (function(x) { console.log(x() === eval("x")); })(function f() { return f; }); } expect_stdout: true } iife_eval_2: { options = { reduce_vars: true, unused: true, } input: { (function() { var x = function f() { return f; }; console.log(x() === eval("x")); })(); } expect: { (function() { var x = function f() { return f; }; console.log(x() === eval("x")); })(); } expect_stdout: true } iife_func_side_effects: { options = { reduce_vars: true, unused: true, } input: { (function(a, b, c) { return b(); })(x(), function() { return y(); }, z()); } expect: { (function(a, b, c) { return function() { return y(); }(); })(x(), 0, z()); } } issue_1595_1: { options = { evaluate: true, reduce_vars: true, unused: true, } input: { (function f(a) { return f(a + 1); })(2); } expect: { (function f(a) { return f(a + 1); })(2); } } issue_1595_2: { options = { evaluate: true, reduce_vars: true, unused: true, } input: { (function f(a) { return g(a + 1); })(2); } expect: { (function(a) { return g(a + 1); })(2); } } issue_1595_3: { options = { evaluate: true, passes: 2, reduce_vars: true, unused: true, } input: { (function f(a) { return g(a + 1); })(2); } expect: { (function(a) { return g(3); })(); } } issue_1595_4: { options = { evaluate: true, reduce_vars: true, unused: true, } input: { (function iife(a, b, c) { console.log(a, b, c); if (a) iife(a - 1, b, c); })(3, 4, 5); } expect: { (function iife(a, b, c) { console.log(a, b, c); if (a) iife(a - 1, b, c); })(3, 4, 5); } expect_stdout: true } issue_1606: { options = { evaluate: true, hoist_vars: true, reduce_vars: true, } input: { function f() { var a; function g(){}; var b = 2; x(b); } } expect: { function f() { var a, b; function g(){}; b = 2; x(b); } } } issue_1670_1: { options = { comparisons: true, conditionals: true, evaluate: true, dead_code: true, reduce_vars: true, unused: true, } input: { (function f() { switch (1) { case 0: var a = true; break; default: if (typeof a === "undefined") console.log("PASS"); else console.log("FAIL"); } })(); } expect: { (function() { var a; void 0 === a ? console.log("PASS") : console.log("FAIL"); })(); } expect_stdout: "PASS" } issue_1670_2: { options = { conditionals: true, evaluate: true, dead_code: true, passes: 2, reduce_vars: true, unused: true, } input: { (function f() { switch (1) { case 0: var a = true; break; default: if (typeof a === "undefined") console.log("PASS"); else console.log("FAIL"); } })(); } expect: { (function() { console.log("PASS"); })(); } expect_stdout: "PASS" } issue_1670_3: { options = { comparisons: true, conditionals: true, evaluate: true, dead_code: true, reduce_vars: true, unused: true, } input: { (function f() { switch (1) { case 0: var a = true; break; case 1: if (typeof a === "undefined") console.log("PASS"); else console.log("FAIL"); } })(); } expect: { (function() { var a; void 0 === a ? console.log("PASS") : console.log("FAIL"); })(); } expect_stdout: "PASS" } issue_1670_4: { options = { conditionals: true, evaluate: true, dead_code: true, passes: 2, reduce_vars: true, unused: true, } input: { (function f() { switch (1) { case 0: var a = true; break; case 1: if (typeof a === "undefined") console.log("PASS"); else console.log("FAIL"); } })(); } expect: { (function() { console.log("PASS"); })(); } expect_stdout: "PASS" } issue_1670_5: { options = { dead_code: true, evaluate: true, keep_fargs: false, reduce_vars: true, unused: true, } input: { (function(a) { switch (1) { case a: console.log(a); break; default: console.log(2); break; } })(1); } expect: { (function() { console.log(1); })(); } expect_stdout: "1" } issue_1670_6: { options = { dead_code: true, evaluate: true, keep_fargs: false, reduce_vars: true, unused: true, } input: { (function(a) { switch (1) { case a = 1: console.log(a); break; default: console.log(2); break; } })(1); } expect: { (function(a) { switch (1) { case a = 1: console.log(a); break; default: console.log(2); } })(1); } expect_stdout: "1" }