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fix corner cases in assignments, reduce_vars & unused (#3950)

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fixes #3949
fixes #3951
This commit is contained in:
Alex Lam S.L
2020-06-04 21:06:43 +01:00
committed by GitHub
parent a489f8cb5e
commit 04fd3d90f8
9 changed files with 317 additions and 75 deletions
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170
test/compress/reduce_vars.js
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@@ -1520,8 +1520,7 @@ func_inline: {
}
expect: {
function f() {
console.log(1 + h());
var h;
console.log(1 + (void 0)());
}
}
}
@@ -2671,8 +2670,8 @@ var_assign_6: {
}
expect: {
!function() {
var a = function(){}(a = 1);
console.log(a);
(function(){}());
console.log(void 0);
}();
}
expect_stdout: "undefined"
@@ -7111,3 +7110,166 @@ issue_3922: {
}
expect_stdout: "PASS"
}
issue_3949_1: {
options = {
evaluate: true,
reduce_vars: true,
}
input: {
(function f(a) {
var a = void (a = 0, g);
function g() {
console.log(typeof a);
}
g();
})();
}
expect: {
(function f(a) {
var a = void (a = 0, g);
function g() {
console.log(typeof a);
}
g();
})();
}
expect_stdout: "undefined"
}
issue_3949_2: {
options = {
reduce_vars: true,
unused: true,
}
input: {
(function f(a) {
var a = void (a = 0, g);
function g() {
console.log(typeof a);
}
g();
})();
}
expect: {
(function(a) {
a = void (a = 0, g);
function g() {
console.log(typeof a);
}
g();
})();
}
expect_stdout: "undefined"
}
issue_3949_3: {
options = {
evaluate: true,
reduce_vars: true,
toplevel: true,
}
input: {
function f() {}
for (var a, i = 3; 0 <= --i; ) {
a = f;
console.log(a === b);
var b = a;
}
}
expect: {
function f() {}
for (var a, i = 3; 0 <= --i; ) {
a = f;
console.log(a === b);
var b = a;
}
}
expect_stdout: [
"false",
"true",
"true",
]
}
issue_3949_4: {
options = {
reduce_vars: true,
unused: true,
toplevel: true,
}
input: {
function f() {}
for (var a, i = 3; 0 <= --i; ) {
a = f;
console.log(a === b);
var b = a;
}
}
expect: {
function f() {}
for (var a, i = 3; 0 <= --i; ) {
a = f;
console.log(a === b);
var b = a;
}
}
expect_stdout: [
"false",
"true",
"true",
]
}
local_assignment_lambda: {
options = {
evaluate: true,
reduce_vars: true,
sequences: true,
toplevel: true,
unused: true,
}
input: {
var a = "FAIL";
function f() {
a = "PASS";
console.log(a);
}
f();
f();
}
expect: {
function f() {
console.log("PASS");
}
f(),
f();
}
expect_stdout: [
"PASS",
"PASS",
]
}
local_assignment_loop: {
options = {
evaluate: true,
reduce_vars: true,
sequences: true,
toplevel: true,
unused: true,
}
input: {
var a = "FAIL";
do {
a = "PASS";
console.log(a);
} while (!console);
}
expect: {
do {
console.log("PASS");
} while (!console);
}
expect_stdout: "PASS"
}