Reverted previous addition of compression of conditionals where the condition and consequent are equivalent.

lib/compress.js

@@ -2332,15 +2332,6 @@ merge(Compressor.prototype, {
 
             }
         }
-        // x=y?y:z --> x=y||z
-        if (self.condition.equivalent_to(consequent)
-            && !self.condition.has_side_effects(compressor)) {
-            return make_node(AST_Binary, self.condition, {
-                        left: self.condition,
-                        operator: "||",
-                        right: alternative
-                    });
-        }
         // x=y?true:false --> x=!!y
         if (consequent instanceof AST_True
             && alternative instanceof AST_False) {

test/compress/conditionals.js

@@ -294,42 +294,6 @@ cond_7: {
 }
 
 cond_8: {
-    options = {
-        conditionals: true,
-        evaluate    : true
-    };
-    input: {
-        // compress these
-        a = condition ? condition : b;
-
-        if (condition) {
-            a = condition;
-        } else {
-            a = b;
-        }
-
-        a = condition ? condition : b();
-
-        // Don't compress conditions that have side effects
-        if (condition()) {
-            a = condition();
-        } else {
-            a = b;
-        }
-
-        a = condition() ? condition() : b;
-
-    }
-    expect: {
-        a = condition || b;
-        a = condition || b;
-        a = condition || b();
-        a = condition() ? condition() : b;
-        a = condition() ? condition() : b;
-    }
-}
-
-cond_9: {
     options = {
         conditionals: true,
         evaluate    : true