// “has no side effects”; also it doesn't work for cases like
// `x && true`, though it probably should.
var cond = self.condition.evaluate(compressor);
- if (cond !== self.condition) {
- if (cond) {
- compressor.warn("Condition always true [{file}:{line},{col}]", self.condition.start);
- if (compressor.option("dead_code")) {
- var a = [];
- if (self.alternative) {
- extract_declarations_from_unreachable_code(compressor, self.alternative, a);
- }
- a.push(self.body);
- return make_node(AST_BlockStatement, self, { body: a }).optimize(compressor);
- }
- } else {
+ if (!compressor.option("dead_code") && !(cond instanceof AST_Node)) {
+ var orig = self.condition;
+ self.condition = make_node_from_constant(cond, orig);
+ self.condition = best_of_expression(self.condition.transform(compressor), orig);
+ }
+ if (compressor.option("dead_code")) {
+ if (cond instanceof AST_Node) cond = self.condition.tail_node().evaluate(compressor);
+ if (!cond) {
compressor.warn("Condition always false [{file}:{line},{col}]", self.condition.start);
- if (compressor.option("dead_code")) {
- var a = [];
- extract_declarations_from_unreachable_code(compressor, self.body, a);
- if (self.alternative) a.push(self.alternative);
- return make_node(AST_BlockStatement, self, { body: a }).optimize(compressor);
+ var body = [];
+ extract_declarations_from_unreachable_code(compressor, self.body, body);
+ body.push(make_node(AST_SimpleStatement, self.condition, {
+ body: self.condition
+ }));
+ if (self.alternative) body.push(self.alternative);
+ return make_node(AST_BlockStatement, self, { body: body }).optimize(compressor);
+ } else if (!(cond instanceof AST_Node)) {
+ compressor.warn("Condition always true [{file}:{line},{col}]", self.condition.start);
+ var body = [];
+ if (self.alternative) {
+ extract_declarations_from_unreachable_code(compressor, self.alternative, body);
}
+ body.push(make_node(AST_SimpleStatement, self.condition, {
+ body: self.condition
+ }));
+ body.push(self.body);
+ return make_node(AST_BlockStatement, self, { body: body }).optimize(compressor);
}
- cond = make_node_from_constant(cond, self.condition).transform(compressor);
- self.condition = best_of_expression(cond, self.condition);
}
var negated = self.condition.negate(compressor);
var self_condition_length = self.condition.print_to_string().length;