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fix corner cases with collapse_vars, inline & reduce_vars (#2637)

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fixes #2630
This commit is contained in:
Alex Lam S.L
2017-12-24 01:24:12 +08:00
committed by GitHub
parent c07ea17c01
commit 202f90ef8f
2 changed files with 169 additions and 2 deletions
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6
lib/compress.js
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@@ -1089,6 +1089,7 @@ merge(Compressor.prototype, {
for (var i = stat_index; !abort && i < statements.length; i++) {
statements[i].transform(multi_replacer);
}
value_def.single_use = false;
}
}
if (replaced && !remove_candidate(candidate)) statements.splice(stat_index, 1);
@@ -3958,13 +3959,14 @@ merge(Compressor.prototype, {
&& (exp === fn ? !fn.name
: compressor.option("unused")
&& (def = exp.definition()).references.length == 1
&& !recursive_ref(compressor, def))
&& !recursive_ref(compressor, def)
&& fn.is_constant_expression(exp.scope))
&& !self.has_pure_annotation(compressor)
&& !fn.contains_this()
&& (scope = can_flatten_args(fn))
&& (value = flatten_body(stat))) {
var expressions = flatten_args(fn, scope);
expressions.push(value);
expressions.push(value.clone(true));
return make_sequence(self, expressions).optimize(compressor);
}
if (compressor.option("side_effects") && all(fn.body, is_empty)) {