diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/compress.js | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/lib/compress.js b/lib/compress.js index 8cf7262a..93dbe063 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -1350,7 +1350,7 @@ merge(Compressor.prototype, { var lhs = get_lhs(candidate); var side_effects = lhs && lhs.has_side_effects(compressor); var scan_lhs = lhs && !side_effects && !is_lhs_read_only(lhs, compressor); - var scan_rhs = foldable(get_rhs(candidate)); + var scan_rhs = foldable(candidate); if (!scan_lhs && !scan_rhs) continue; var modify_toplevel = false; // Locate symbols which may execute code outside of scanning range @@ -1841,10 +1841,6 @@ merge(Compressor.prototype, { } } - function get_rhs(expr) { - return candidate instanceof AST_Assign && candidate.operator == "=" && candidate.right; - } - function invariant(expr) { if (expr instanceof AST_Array) return false; if (expr instanceof AST_Binary && lazy_op[expr.operator]) { @@ -1859,7 +1855,9 @@ merge(Compressor.prototype, { } function foldable(expr) { - if (!expr) return false; + while (expr instanceof AST_Assign && expr.operator == "=") { + expr = expr.right; + } if (expr instanceof AST_SymbolRef) { var value = expr.evaluate(compressor); if (value === expr) return rhs_exact_match; |