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fix corner case in unsafe_math (#3548)

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fixes #3547
This commit is contained in:
Alex Lam S.L
2019-10-29 17:06:57 +08:00
committed by GitHub
parent bad664c632
commit 22a09ea7c5
2 changed files with 158 additions and 15 deletions
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37
lib/compress.js
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@@ -6024,9 +6024,12 @@ merge(Compressor.prototype, {
if (self.right instanceof AST_Constant
&& self.left instanceof AST_Binary
&& self.left.operator != "%"
&& PRECEDENCE[self.left.operator] == PRECEDENCE[self.operator]) {
&& PRECEDENCE[self.left.operator] == PRECEDENCE[self.operator]
&& self.left.is_number(compressor)) {
if (self.left.left instanceof AST_Constant
&& (self.left.operator != "+" || self.left.right.is_number(compressor))) {
&& (self.operator != "+"
|| self.left.left.is_boolean(compressor)
|| self.left.left.is_number(compressor))) {
self = make_node(AST_Binary, self, {
operator: self.left.operator,
left: make_node(AST_Binary, self.left, {
@@ -6038,19 +6041,23 @@ merge(Compressor.prototype, {
}),
right: self.left.right
});
} else if (self.left.right instanceof AST_Constant
&& (self.left.operator != "+" || self.left.left.is_number(compressor))) {
self = make_node(AST_Binary, self, {
operator: self.left.operator,
left: self.left.left,
right: make_node(AST_Binary, self.left, {
operator: align(self.left.operator, self.operator),
left: self.left.right,
right: self.right,
start: self.left.right.start,
end: self.right.end
})
});
} else if (self.left.right instanceof AST_Constant) {
var op = align(self.left.operator, self.operator);
if (op != "+"
|| self.left.right.is_boolean(compressor)
|| self.left.right.is_number(compressor)) {
self = make_node(AST_Binary, self, {
operator: self.left.operator,
left: self.left.left,
right: make_node(AST_Binary, self.left, {
operator: op,
left: self.left.right,
right: self.right,
start: self.left.right.start,
end: self.right.end
})
});
}
}
}
break;