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enhance collapse_vars (#3613)

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This commit is contained in:
Alex Lam S.L
2019-11-29 17:45:49 +08:00
committed by GitHub
parent 5a88c30d65
commit 1b61a81b5d
2 changed files with 260 additions and 49 deletions
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180
test/compress/collapse_vars.js
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@@ -1348,8 +1348,7 @@ collapse_vars_array_3: {
}
expect: {
function f(a) {
var b;
return [ b = a, b, b ];
return [ a, a, a ];
}
console.log(f().length);
}
@@ -1487,11 +1486,10 @@ collapse_vars_object_3: {
}
expect: {
function f(a) {
var b;
return {
p: b = a,
q: b,
r: b,
p: a,
q: a,
r: a,
};
}
console.log(f("PASS").r);
@@ -6304,7 +6302,7 @@ assign_left: {
}
expect: {
console.log(function(a, b) {
(b = a).p.q = "PASS";
a.p.q = "PASS";
return a.p.q;
}({p: {}}));
}
@@ -6317,12 +6315,12 @@ sub_property: {
}
input: {
console.log(function(a, b) {
return a[(b = a, b.length - 1)];
return a[b = a, b.length - 1];
}([ "FAIL", "PASS" ]));
}
expect: {
console.log(function(a, b) {
return a[(b = a).length - 1];
return a[a.length - 1];
}([ "FAIL", "PASS" ]));
}
expect_stdout: "PASS"
@@ -6754,7 +6752,7 @@ local_value_replacement: {
}
expect: {
function f(a, b) {
(a = b) && g(a);
b && g(b);
}
function g(c) {
console.log(c);
@@ -6805,3 +6803,165 @@ array_in_object_2: {
}
expect_stdout: "1 1"
}
array_in_conditional: {
options = {
collapse_vars: true,
}
input: {
var a = 1, b = 2, c;
console.log(c && [ b = a ], a, b);
}
expect: {
var a = 1, b = 2, c;
console.log(c && [ b = a ], a, b);
}
expect_stdout: "undefined 1 2"
}
object_in_conditional: {
options = {
collapse_vars: true,
}
input: {
var a = 1, b = 2, c;
console.log(c && {
p: b = a
}, a, b);
}
expect: {
var a = 1, b = 2, c;
console.log(c && {
p: b = a
}, a, b);
}
expect_stdout: "undefined 1 2"
}
sequence_in_iife_1: {
options = {
collapse_vars: true,
}
input: {
var a = "foo", b = 42;
(function() {
var c = (b = a, b);
})();
console.log(a, b);
}
expect: {
var a = "foo", b = 42;
(function() {
var c = b = a;
})();
console.log(a, b);
}
expect_stdout: "foo foo"
}
sequence_in_iife_2: {
options = {
collapse_vars: true,
inline: true,
passes: 2,
side_effects: true,
unused: true,
}
input: {
var a = "foo", b = 42;
(function() {
var c = (b = a, b);
})();
console.log(a, b);
}
expect: {
var a = "foo", b = 42;
console.log(a, a);
}
expect_stdout: "foo foo"
}
retain_assign: {
options = {
collapse_vars: true,
}
input: {
var a = 42, b, c = "FAIL";
b = a;
b++ && (c = "PASS");
console.log(c);
}
expect: {
var a = 42, b, c = "FAIL";
b = a;
b++ && (c = "PASS");
console.log(c);
}
expect_stdout: "PASS"
}
getter_side_effect: {
options = {
collapse_vars: true,
}
input: {
var c = "FAIL";
(function(a) {
var b;
(b = a) && {
get foo() {
a = 0;
}
}.foo;
b && (c = "PASS");
})(42);
console.log(c);
}
expect: {
var c = "FAIL";
(function(a) {
var b;
(b = a) && {
get foo() {
a = 0;
}
}.foo;
b && (c = "PASS");
})(42);
console.log(c);
}
expect_stdout: "PASS"
}
setter_side_effect: {
options = {
collapse_vars: true,
}
input: {
var c = "FAIL";
(function(a) {
var b;
(b = a) && ({
set foo(v) {
a = v;
}
}.foo = 0);
b && (c = "PASS");
})(42);
console.log(c);
}
expect: {
var c = "FAIL";
(function(a) {
var b;
(b = a) && ({
set foo(v) {
a = v;
}
}.foo = 0);
b && (c = "PASS");
})(42);
console.log(c);
}
expect_stdout: "PASS"
}