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improve collapse_vars on side-effect-free replacements (#2583)

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This commit is contained in:
Alex Lam S.L
2017-12-13 04:52:54 +08:00
committed by GitHub
parent e008dc1bde
commit 04cc395c35
2 changed files with 51 additions and 2 deletions
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5
lib/compress.js
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@@ -893,10 +893,11 @@ merge(Compressor.prototype, {
|| node instanceof AST_Call && lhs instanceof AST_PropAccess && lhs.equivalent_to(node.expression)
|| node instanceof AST_Debugger
|| node instanceof AST_IterationStatement && !(node instanceof AST_For)
|| node instanceof AST_SymbolRef && !node.is_declared(compressor)
|| node instanceof AST_Try
|| node instanceof AST_With
|| parent instanceof AST_For && node !== parent.init) {
|| parent instanceof AST_For && node !== parent.init
|| (side_effects || !replace_all)
&& (node instanceof AST_SymbolRef && !node.is_declared(compressor))) {
abort = true;
return node;
}