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reduce overlap of sequences & side_effects (#5344)

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This commit is contained in:
Alex Lam S.L
2022-02-07 16:29:04 +00:00
committed by GitHub
parent 327e94a759
commit b6c72c84d4
9 changed files with 280 additions and 17 deletions
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1
test/compress/drop-unused.js
View File

@@ -3358,6 +3358,7 @@ issue_4806_1: {
issue_4806_2: {
options = {
sequences: true,
side_effects: true,
toplevel: true,
unused: true,
}

1
test/compress/functions.js
View File

@@ -6135,6 +6135,7 @@ issue_4265: {
dead_code: true,
inline: true,
sequences: true,
side_effects: true,
}
input: {
function f() {

40
test/compress/ie.js
View File

@@ -2631,13 +2631,14 @@ issue_3999: {
]
}
issue_4001: {
issue_4001_1: {
options = {
collapse_vars: true,
ie: true,
inline: true,
reduce_vars: true,
sequences: true,
side_effects: false,
toplevel: true,
unused: true,
}
@@ -2660,7 +2661,42 @@ issue_4001: {
return a;
}
var a;
console.log((a = 42, void f()[42], void function a() {}));
console.log((a = 42, f()[42], void f, void function a() {}));
}
expect_stdout: "undefined"
}
issue_4001_2: {
options = {
collapse_vars: true,
ie: true,
inline: true,
reduce_vars: true,
sequences: true,
side_effects: true,
toplevel: true,
unused: true,
}
input: {
console.log(function(a) {
function f() {
return a;
var b;
}
var c = f();
(function g() {
c[42];
f;
})();
(function a() {});
}(42));
}
expect: {
function f() {
return a;
}
var a;
console.log((a = 42, void f()[42]));
}
expect_stdout: "undefined"
}

32
test/compress/issue-640.js
View File

@@ -317,7 +317,35 @@ iife: {
typeof function g() {}();
}
expect: {
x = 42, function a() {}(), function b() {}(), function c() {}(),
function d() {}(), function e() {}(), function f() {}(), typeof function g() {}();
x = 42,
function a() {}(),
!function b() {}(),
~function c() {}(),
+function d() {}(),
-function e() {}(),
void function f() {}(),
typeof function g() {}();
}
}
iife_drop_side_effect_free: {
options = {
expression: true,
sequences: true,
side_effects: true,
}
input: {
x = 42;
(function a() {})();
!function b() {}();
~function c() {}();
+function d() {}();
-function e() {}();
void function f() {}();
typeof function g() {}();
}
expect: {
x = 42,
typeof void 0;
}
}

1
test/compress/merge_vars.js
View File

@@ -253,6 +253,7 @@ read_before_assign_1: {
inline: true,
merge_vars: true,
sequences: true,
side_effects: true,
toplevel: true,
}
input: {

72
test/compress/negate-iife.js
View File

@@ -122,13 +122,41 @@ negate_iife_4: {
sequences: true,
}
input: {
(function(){ return t })() ? console.log(true) : console.log(false);
(function(){
(function() {
return t;
})() ? console.log(true) : console.log(false);
(function() {
console.log("something");
})();
}
expect: {
!function(){ return t }() ? console.log(false) : console.log(true), function(){
!function() {
return t;
}() ? console.log(false) : console.log(true), !function() {
console.log("something");
}();
}
}
negate_iife_4_drop_side_effect_free: {
options = {
conditionals: true,
negate_iife: true,
sequences: true,
side_effects: true,
}
input: {
(function() {
return t;
})() ? console.log(true) : console.log(false);
(function() {
console.log("something");
})();
}
expect: {
!function() {
return t;
}() ? console.log(false) : console.log(true), function() {
console.log("something");
}();
}
@@ -176,17 +204,49 @@ negate_iife_5: {
sequences: true,
}
input: {
if ((function(){ return t })()) {
if (function() {
return t;
}()) {
foo(true);
} else {
bar(false);
}
(function(){
(function() {
console.log("something");
})();
}
expect: {
!function(){ return t }() ? bar(false) : foo(true), function(){
!function() {
return t;
}() ? bar(false) : foo(true), !function() {
console.log("something");
}();
}
}
negate_iife_5_drop_side_effect_free: {
options = {
conditionals: true,
negate_iife: true,
sequences: true,
side_effects: true,
}
input: {
if (function() {
return t;
}()) {
foo(true);
} else {
bar(false);
}
(function() {
console.log("something");
})();
}
expect: {
!function() {
return t;
}() ? bar(false) : foo(true), function() {
console.log("something");
}();
}

1
test/compress/pure_getters.js
View File

@@ -1289,6 +1289,7 @@ issue_2878: {
collapse_vars: true,
pure_getters: true,
sequences: true,
side_effects: true,
}
input: {
var c = 0;

145
test/compress/sequences.js
View File

@@ -289,8 +289,34 @@ iife: {
typeof function g() {}();
}
expect: {
x = 42, function a() {}(), function b() {}(), function c() {}(),
function d() {}(), function e() {}(), function f() {}(), function g() {}();
x = 42,
function a() {}(),
!function b() {}(),
~function c() {}(),
+function d() {}(),
-function e() {}(),
void function f() {}(),
typeof function g() {}();
}
}
iife_drop_side_effect_free: {
options = {
sequences: true,
side_effects: true,
}
input: {
x = 42;
(function a() {})();
!function b() {}();
~function c() {}();
+function d() {}();
-function e() {}();
void function f() {}();
typeof function g() {}();
}
expect: {
x = 42;
}
}
@@ -1045,11 +1071,102 @@ call: {
b.c = function() {
console.log(this === b ? "bar" : "baz");
},
a,
b(),
a,
b.c(),
(a, b.c)(),
a,
b["c"](),
(a, b["c"])(),
a,
function() {
console.log(this === a);
}(),
a,
new b(),
a,
new b.c(),
a,
new b.c(),
a,
new b["c"](),
a,
new b["c"](),
a,
new function() {
console.log(this === a);
}(),
console.log((a, typeof b.c)),
console.log((a, typeof b["c"]));
}
expect_stdout: [
"foo",
"bar",
"baz",
"bar",
"baz",
"true",
"foo",
"baz",
"baz",
"baz",
"baz",
"false",
"function",
"function",
]
}
call_drop_side_effect_free: {
options = {
sequences: true,
side_effects: true,
}
input: {
var a = function() {
return this;
}();
function b() {
console.log("foo");
}
b.c = function() {
console.log(this === b ? "bar" : "baz");
};
(a, b)();
(a, b).c();
(a, b.c)();
(a, b)["c"]();
(a, b["c"])();
(a, function() {
console.log(this === a);
})();
new (a, b)();
new (a, b).c();
new (a, b.c)();
new (a, b)["c"]();
new (a, b["c"])();
new (a, function() {
console.log(this === a);
})();
console.log(typeof (a, b).c);
console.log(typeof (a, b)["c"]);
}
expect: {
var a = function() {
return this;
}();
function b() {
console.log("foo");
}
b.c = function() {
console.log(this === b ? "bar" : "baz");
},
b(),
b.c(),
(0, b.c)(),
b["c"](),
(0, b["c"])(),
function() {
console.log(this === a);
}(),
@@ -1061,8 +1178,8 @@ call: {
new function() {
console.log(this === a);
}(),
console.log((a, typeof b.c)),
console.log((a, typeof b["c"]));
console.log(typeof b.c),
console.log(typeof b["c"]);
}
expect_stdout: [
"foo",
@@ -1097,6 +1214,26 @@ missing_link: {
expect: {
var a = 100;
a,
a++ + (0, 1),
console.log(a);
}
}
missing_link_drop_side_effect_free: {
options = {
conditionals: true,
evaluate: true,
sequences: true,
side_effects: true,
}
input: {
var a = 100;
a;
a++ + (0 ? 2 : 1);
console.log(a);
}
expect: {
var a = 100;
a++,
console.log(a);
}