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fix delete corner cases (#1799)

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- assignment
- boolean
- conditional
- sequence
This commit is contained in:
Alex Lam S.L
2017-04-08 14:25:28 +08:00
committed by GitHub
parent a1532eb076
commit cf72fe552f
5 changed files with 369 additions and 24 deletions
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55
test/compress/drop-unused.js
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@@ -974,3 +974,58 @@ issue_1715_4: {
}
expect_stdout: "1"
}
delete_assign_1: {
options = {
booleans: true,
side_effects: true,
toplevel: true,
unused: true,
}
input: {
var a;
console.log(delete (a = undefined));
console.log(delete (a = void 0));
console.log(delete (a = Infinity));
console.log(delete (a = 1 / 0));
console.log(delete (a = NaN));
console.log(delete (a = 0 / 0));
}
expect: {
console.log((void 0, !0));
console.log((void 0, !0));
console.log((1 / 0, !0));
console.log((1 / 0, !0));
console.log((NaN, !0));
console.log((0 / 0, !0));
}
expect_stdout: true
}
delete_assign_2: {
options = {
booleans: true,
keep_infinity: true,
side_effects: true,
toplevel: true,
unused: true,
}
input: {
var a;
console.log(delete (a = undefined));
console.log(delete (a = void 0));
console.log(delete (a = Infinity));
console.log(delete (a = 1 / 0));
console.log(delete (a = NaN));
console.log(delete (a = 0 / 0));
}
expect: {
console.log((void 0, !0));
console.log((void 0, !0));
console.log((Infinity, !0));
console.log((1 / 0, !0));
console.log((NaN, !0));
console.log((0 / 0, !0));
}
expect_stdout: true
}