diff options
Diffstat (limited to 'lib/compress.js')
| -rw-r--r-- | lib/compress.js | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/lib/compress.js b/lib/compress.js index 578e73cc..83d20e8f 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -9390,7 +9390,8 @@ merge(Compressor.prototype, { || self.right.left.is_number(compressor)) && (self.operator != "-" || !self.left.is_negative_zero()) && (self.right.left.is_constant_expression() - || !self.right.right.has_side_effects(compressor))) { + || !self.right.right.has_side_effects(compressor)) + && !is_modify_array(self.right.right)) { self = make_node(AST_Binary, self, { operator: align(self.operator, self.right.operator), left: make_node(AST_Binary, self.left, { @@ -9534,6 +9535,21 @@ merge(Compressor.prototype, { } return try_evaluate(compressor, self); + function is_modify_array(node) { + var found = false; + node.walk(new TreeWalker(function(node) { + if (found) return true; + if (node instanceof AST_Assign) { + if (node.left instanceof AST_PropAccess) return found = true; + } else if (node instanceof AST_Unary) { + if (unary_side_effects[node.operator] && node.expression instanceof AST_PropAccess) { + return found = true; + } + } + })); + return found; + } + function align(ref, op) { switch (ref) { case "-": |