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fix various corner cases (#3126)

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- augment ufuzz/reminify test options

fixes #3125
This commit is contained in:
Alex Lam S.L
2018-05-07 07:36:25 +08:00
committed by GitHub
parent 6b91d12ec3
commit df8a99439a
4 changed files with 132 additions and 10 deletions
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31
lib/compress.js
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@@ -491,7 +491,10 @@ merge(Compressor.prototype, {
mark_escaped(tw, d, scope, parent, value, level + 1, depth + 1);
if (value) return;
}
if (level == 0) d.direct_access = true;
if (level > 0) return;
if (parent instanceof AST_Sequence && node !== parent.tail_node()) return;
if (parent instanceof AST_SimpleStatement) return;
d.direct_access = true;
}
var suppressor = new TreeWalker(function(node) {
@@ -509,17 +512,21 @@ merge(Compressor.prototype, {
walk_defuns(tw, this);
return true;
});
def(AST_Assign, function(tw) {
def(AST_Assign, function(tw, descend, compressor) {
var node = this;
if (!(node.left instanceof AST_SymbolRef)) return;
var d = node.left.definition();
var sym = node.left;
if (!(sym instanceof AST_SymbolRef)) return;
var d = sym.definition();
var fixed = d.fixed;
if (!fixed && node.operator != "=") return;
if (!safe_to_assign(tw, d, node.left.scope, node.right)) return;
d.references.push(node.left);
if (!safe_to_assign(tw, d, sym.scope, node.right)) return;
var eq = node.operator == "=";
var value = eq ? node.right : node;
if (is_modified(compressor, tw, node, value, 0)) return;
d.references.push(sym);
d.assignments++;
if (node.operator != "=") d.chained = true;
d.fixed = node.operator == "=" ? function() {
if (!eq) d.chained = true;
d.fixed = eq ? function() {
return node.right;
} : function() {
return make_node(AST_Binary, node, {
@@ -531,6 +538,7 @@ merge(Compressor.prototype, {
mark(tw, d, false);
node.right.walk(tw);
mark(tw, d, true);
mark_escaped(tw, d, sym.scope, node, value, 0, 1);
return true;
});
def(AST_Binary, function(tw) {
@@ -4682,13 +4690,16 @@ merge(Compressor.prototype, {
func = func.fixed_value();
}
if (func instanceof AST_Lambda && !func.contains_this()) {
return make_sequence(this, [
return (self.args.length ? make_sequence(this, [
self.args[0],
make_node(AST_Call, self, {
expression: exp.expression,
args: self.args.slice(1)
})
]).optimize(compressor);
]) : make_node(AST_Call, self, {
expression: exp.expression,
args: []
})).optimize(compressor);
}
break;
}