JoBoEVD/UglifyJS
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drop unused assignment based on reduce_vars (#2709)

Browse Source
This commit is contained in:
Alex Lam S.L
2018-01-04 01:03:33 +08:00
committed by GitHub
parent 14778e049b
commit cfe3a98ce5
5 changed files with 238 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

122
test/compress/drop-unused.js
View File

@@ -1522,3 +1522,125 @@ issue_2665: {
}
expect_stdout: "-1"
}
double_assign_1: {
options = {
passes: 2,
reduce_vars: true,
side_effects: true,
unused: true,
}
input: {
function f1() {
var a = {};
var a = [];
return a;
}
function f2() {
var a = {};
a = [];
return a;
}
function f3() {
a = {};
var a = [];
return a;
}
function f4(a) {
a = {};
a = [];
return a;
}
function f5(a) {
var a = {};
a = [];
return a;
}
function f6(a) {
a = {};
var a = [];
return a;
}
console.log(f1(), f2(), f3(), f4(), f5(), f6());
}
expect: {
function f1() {
return [];
}
function f2() {
var a;
a = [];
return a;
}
function f3() {
return [];
}
function f4(a) {
a = [];
return a;
}
function f5(a) {
a = [];
return a;
}
function f6(a) {
a = [];
return a;
}
console.log(f1(), f2(), f3(), f4(), f5(), f6());
}
expect_stdout: true
}
double_assign_2: {
options = {
reduce_vars: true,
toplevel: true,
unused: true,
}
input: {
for (var i = 0; i < 2; i++)
a = void 0, a = {}, console.log(a);
var a;
}
expect: {
for (var i = 0; i < 2; i++)
void 0, a = {}, console.log(a);
var a;
}
}
double_assign_3: {
options = {
reduce_vars: true,
toplevel: true,
unused: true,
}
input: {
for (var i = 0; i < 2; i++)
a = void 0, a = { a: a }, console.log(a);
var a;
}
expect: {
for (var i = 0; i < 2; i++)
a = void 0, a = { a: a }, console.log(a);
var a;
}
}
cascade_drop_assign: {
options = {
reduce_vars: true,
toplevel: true,
unused: true,
}
input: {
var a, b = a = "PASS";
console.log(b);
}
expect: {
var b = "PASS";
console.log(b);
}
expect_stdout: "PASS"
}

41
test/compress/reduce_vars.js
View File

@@ -299,7 +299,7 @@ unsafe_evaluate_modified: {
console.log(function(){ var o={p:1}; o.p++; console.log(o.p); return o.p; }());
console.log(function(){ var o={p:2}; --o.p; console.log(o.p); return o.p; }());
console.log(function(){ var o={p:3}; o.p += ""; console.log(o.p); return o.p; }());
console.log(function(){ var o={p:4}; o = {}; console.log(o.p); return o.p; }());
console.log(function(){ var o; o = {}; console.log(o.p); return o.p; }());
console.log(function(){ var o={p:5}; o.p = -9; console.log(o.p); return o.p; }());
function inc() { this.p++; }
console.log(function(){ var o={p:6}; inc.call(o); console.log(o.p); return o.p; }());
@@ -5237,3 +5237,42 @@ defun_catch_6: {
}
expect_stdout: "42"
}
duplicate_lambda_defun_name_1: {
options = {
reduce_vars: true,
}
input: {
console.log(function f(a) {
function f() {}
return f.length;
}());
}
expect: {
console.log(function f(a) {
function f() {}
return f.length;
}());
}
expect_stdout: "0"
}
duplicate_lambda_defun_name_2: {
options = {
passes: 2,
reduce_vars: true,
unused: true,
}
input: {
console.log(function f(a) {
function f() {}
return f.length;
}());
}
expect: {
console.log(function(a) {
return function() {}.length;
}());
}
expect_stdout: "0"
}

40
test/compress/typeof.js
View File

@@ -138,3 +138,43 @@ typeof_defun_2: {
"2",
]
}
duplicate_defun_arg_name: {
options = {
evaluate: true,
reduce_vars: true,
typeofs: true,
}
input: {
function long_name(long_name) {
return typeof long_name;
}
console.log(typeof long_name, long_name());
}
expect: {
function long_name(long_name) {
return typeof long_name;
}
console.log(typeof long_name, long_name());
}
expect_stdout: "function undefined"
}
duplicate_lambda_arg_name: {
options = {
evaluate: true,
reduce_vars: true,
typeofs: true,
}
input: {
console.log(function long_name(long_name) {
return typeof long_name;
}());
}
expect: {
console.log(function long_name(long_name) {
return typeof long_name;
}());
}
expect_stdout: "undefined"
}