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fix corner cases in collapse_vars & hoist_vars (#5412)

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fixes #5411
This commit is contained in:
Alex Lam S.L
2022-04-06 21:12:03 +01:00
committed by GitHub
parent 998c9792da
commit 21bd4c4a9d
2 changed files with 105 additions and 15 deletions
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83
test/compress/hoist_vars.js
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@@ -224,8 +224,7 @@ issue_4489: {
console.log(k);
}
expect: {
!(A = 0);
for (var k in true);
for (var k in !(A = 0));
console.log(k);
}
expect_stdout: "undefined"
@@ -407,9 +406,9 @@ issue_4893_2: {
expect: {
try{
(function() {
var b;
b = null;
b.p += 42;
var a;
a = null;
a.p += 42;
})();
} catch (e) {
console.log("PASS");
@@ -530,3 +529,77 @@ issue_5378: {
"undefined",
]
}
issue_5411_1: {
options = {
collapse_vars: true,
dead_code: true,
hoist_vars: true,
reduce_vars: true,
side_effects: true,
toplevel: true,
}
input: {
var a = "PASS";
b++;
b = a;
var b = b, c = c && c[b];
console.log(b);
}
expect: {
var b, c, a = "PASS";
b++;
b = a;
c = c && c[b];
console.log(b);
}
expect_stdout: "PASS"
}
issue_5411_2: {
options = {
collapse_vars: true,
dead_code: true,
evaluate: true,
hoist_vars: true,
reduce_vars: true,
toplevel: true,
unused: true,
}
input: {
var a = "PASS";
b++;
b = a;
var b = b, c = c && c[b];
console.log(b);
}
expect: {
var b, c;
b++;
b = "PASS",
c = c && c[b];
console.log(b);
}
expect_stdout: "PASS"
}
issue_5411_3: {
options = {
collapse_vars: true,
hoist_vars: true,
reduce_vars: true,
toplevel: true,
}
input: {
var a = console;
a++;
var a = A = a;
console.log(A);
}
expect: {
var a = console;
a = A = ++a;
console.log(A);
}
expect_stdout: "NaN"
}