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

introduce merge_vars (#4100)

Browse Source
This commit is contained in:
Alex Lam S.L
2020-09-15 03:01:48 +01:00
committed by GitHub
parent d33a3a3253
commit 3ac575f2e8
3 changed files with 415 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

233
test/compress/merge_vars.js Normal file
View File

@@ -0,0 +1,233 @@
merge: {
options = {
merge_vars: true,
toplevel: false,
}
input: {
var a = "foo";
console.log(a);
function f(b) {
var c;
console.log(b);
c = "bar";
console.log(c);
}
f("baz");
var d = "moo";
console.log(d);
}
expect: {
var a = "foo";
console.log(a);
function f(c) {
var c;
console.log(c);
c = "bar";
console.log(c);
}
f("baz");
var d = "moo";
console.log(d);
}
expect_stdout: [
"foo",
"baz",
"bar",
"moo",
]
}
merge_toplevel: {
options = {
merge_vars: true,
toplevel: true,
}
input: {
var a = "foo";
console.log(a);
function f(b) {
var c;
console.log(b);
c = "bar";
console.log(c);
}
f("baz");
var d = "moo";
console.log(d);
}
expect: {
var d = "foo";
console.log(d);
function f(c) {
var c;
console.log(c);
c = "bar";
console.log(c);
}
f("baz");
var d = "moo";
console.log(d);
}
expect_stdout: [
"foo",
"baz",
"bar",
"moo",
]
}
init_scope_vars: {
options = {
merge_vars: true,
unsafe_proto: true,
}
input: {
Function.prototype.call();
}
expect: {
(function() {}).call();
}
expect_stdout: true
}
binary_branch: {
options = {
merge_vars: true,
}
input: {
console.log(function(a) {
var b = "FAIL", c;
a && (c = b);
return c || "PASS";
}());
}
expect: {
console.log(function(a) {
var b = "FAIL", c;
a && (c = b);
return c || "PASS";
}());
}
expect_stdout: "PASS"
}
conditional_branch: {
options = {
merge_vars: true,
}
input: {
console.log(function(a) {
var b = "FAIL", c;
a ? (c = b) : void 0;
return c || "PASS";
}());
}
expect: {
console.log(function(a) {
var b = "FAIL", c;
a ? (c = b) : void 0;
return c || "PASS";
}());
}
expect_stdout: "PASS"
}
if_branch: {
options = {
merge_vars: true,
}
input: {
console.log(function(a) {
var b = "FAIL", c;
if (a) c = b;
return c || "PASS";
}());
}
expect: {
console.log(function(a) {
var b = "FAIL", c;
if (a) c = b;
return c || "PASS";
}());
}
expect_stdout: "PASS"
}
switch_branch: {
options = {
merge_vars: true,
}
input: {
console.log(function(a) {
var b = "FAIL", c;
switch (a) {
case 1:
c = b;
break;
}
return c || "PASS";
}());
}
expect: {
console.log(function(a) {
var b = "FAIL", c;
switch (a) {
case 1:
c = b;
break;
}
return c || "PASS";
}());
}
expect_stdout: "PASS"
}
read_before_assign_1: {
options = {
inline: true,
merge_vars: true,
sequences: true,
toplevel: true,
}
input: {
var c = 0;
c = 0;
(function() {
var a = console.log(++a);
a;
})();
c;
}
expect: {
var c = 0;
var a;
c = 0,
a = console.log(++a);
}
expect_stdout: "NaN"
}
read_before_assign_2: {
options = {
dead_code: true,
loops: true,
merge_vars: true,
}
input: {
console.log(function(a, a) {
while (b)
return "FAIL";
var b = 1;
return "PASS";
}(0, []));
}
expect: {
console.log(function(a, a) {
if (b)
return "FAIL";
var b = 1;
return "PASS";
}(0, []));
}
expect_stdout: "PASS"
}