diff options
| -rw-r--r-- | lib/compress.js | 12 | ||||
| -rw-r--r-- | test/compress/hoist_props.js | 25 |
2 files changed, 34 insertions, 3 deletions
diff --git a/lib/compress.js b/lib/compress.js index 1da49955..3405253d 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -5071,6 +5071,7 @@ merge(Compressor.prototype, { } })); self.transform(new TreeTransformer(function(node, descend) { + if (node instanceof AST_Binary) return replace("right"); if (node instanceof AST_PropAccess) { if (!(node.expression instanceof AST_SymbolRef)) return; var defs = defs_by_id[node.expression.definition().id]; @@ -5086,10 +5087,15 @@ merge(Compressor.prototype, { } if (node instanceof AST_Unary) { if (unary_side_effects[node.operator]) return; - if (!(node.expression instanceof AST_SymbolRef)) return; - if (!(node.expression.definition().id in defs_by_id)) return; + return replace("expression"); + } + + function replace(prop) { + var sym = node[prop]; + if (!(sym instanceof AST_SymbolRef)) return; + if (!(sym.definition().id in defs_by_id)) return; var opt = node.clone(); - opt.expression = make_node(AST_Object, node, { + opt[prop] = make_node(AST_Object, sym, { properties: [] }); return opt; diff --git a/test/compress/hoist_props.js b/test/compress/hoist_props.js index 692dc676..09137cc9 100644 --- a/test/compress/hoist_props.js +++ b/test/compress/hoist_props.js @@ -1016,3 +1016,28 @@ issue_3945_2: { } expect_stdout: "undefined" } + +issue_4023: { + options = { + comparisons: true, + hoist_props: true, + inline: true, + reduce_vars: true, + toplevel: true, + typeofs: true, + unused: true, + } + input: { + function f() { + var a = function() { + return { p: 0 }; + }(); + return console.log("undefined" != typeof a); + } + f(); + } + expect: { + console.log(void 0 !== {}); + } + expect_stdout: "true" +} |