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enhance side_effects (#3384)

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This commit is contained in:
Alex Lam S.L
2019-04-25 15:15:50 +08:00
committed by GitHub
parent cfde686eab
commit e5436ca566
3 changed files with 77 additions and 7 deletions
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12
lib/compress.js
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@@ -4172,10 +4172,8 @@ merge(Compressor.prototype, {
var right = this.right.drop_side_effect_free(compressor, first_in_statement);
if (!right) return this.left.drop_side_effect_free(compressor, first_in_statement);
if (lazy_op[this.operator]) {
var node;
if (right === this.right) {
node = this;
} else {
var node = this;
if (right !== node.right) {
node = this.clone();
node.right = right.drop_side_effect_free(compressor);
}
@@ -4559,14 +4557,14 @@ merge(Compressor.prototype, {
operator : "||",
left : negated,
right : self.body.body
})
}).transform(compressor)
}).optimize(compressor);
return make_node(AST_SimpleStatement, self, {
body: make_node(AST_Binary, self, {
operator : "&&",
left : self.condition,
right : self.body.body
})
}).transform(compressor)
}).optimize(compressor);
}
if (self.body instanceof AST_EmptyStatement
@@ -4576,7 +4574,7 @@ merge(Compressor.prototype, {
operator : "||",
left : self.condition,
right : self.alternative.body
})
}).transform(compressor)
}).optimize(compressor);
}
if (self.body instanceof AST_Exit