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enhance collapse_vars (#3351)

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This commit is contained in:
Alex Lam S.L
2019-03-20 23:31:21 +08:00
committed by GitHub
parent fd788590f6
commit 65648d84a5
2 changed files with 46 additions and 3 deletions
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7
lib/compress.js
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@@ -1361,6 +1361,7 @@ merge(Compressor.prototype, {
hit_stack.push(expr);
if (expr instanceof AST_Assign) {
candidates.push(hit_stack.slice());
extract_candidates(expr.left);
extract_candidates(expr.right);
} else if (expr instanceof AST_Binary) {
extract_candidates(expr.left);
@@ -1376,6 +1377,8 @@ merge(Compressor.prototype, {
extract_candidates(expr.alternative);
} else if (expr instanceof AST_Definitions) {
expr.definitions.forEach(extract_candidates);
} else if (expr instanceof AST_Dot) {
extract_candidates(expr.expression);
} else if (expr instanceof AST_DWLoop) {
extract_candidates(expr.condition);
if (!(expr.body instanceof AST_Block)) {
@@ -1407,6 +1410,9 @@ merge(Compressor.prototype, {
expr.expressions.forEach(extract_candidates);
} else if (expr instanceof AST_SimpleStatement) {
extract_candidates(expr.body);
} else if (expr instanceof AST_Sub) {
extract_candidates(expr.expression);
extract_candidates(expr.property);
} else if (expr instanceof AST_Switch) {
extract_candidates(expr.expression);
expr.body.forEach(extract_candidates);
@@ -1465,6 +1471,7 @@ merge(Compressor.prototype, {
return node;
}
if (parent instanceof AST_IterationStatement) return node;
if (parent instanceof AST_PropAccess) return node;
if (parent instanceof AST_Sequence) {
return find_stop(parent, level + 1, parent.tail_node() !== node);
}