more sequence optimizations (lift some sequences above binary/unary expressions so that we can avoid parens)

test/compress/sequences.js

@@ -87,3 +87,43 @@ make_sequences_4: {
         with (x = 5, obj);
     }
 }
+
+lift_sequences_1: {
+    options = { sequences: true };
+    input: {
+        foo = !(x(), y(), bar());
+    }
+    expect: {
+        x(), y(), foo = !bar();
+    }
+}
+
+lift_sequences_2: {
+    options = { sequences: true, evaluate: true };
+    input: {
+        q = 1 + (foo(), bar(), 5) + 7 * (5 / (3 - (a(), (QW=ER), c(), 2))) - (x(), y(), 5);
+    }
+    expect: {
+        foo(), bar(), a(), QW = ER, c(), x(), y(), q = 36
+    }
+}
+
+lift_sequences_3: {
+    options = { sequences: true, conditionals: true };
+    input: {
+        x = (foo(), bar(), baz()) ? 10 : 20;
+    }
+    expect: {
+        foo(), bar(), x = baz() ? 10 : 20;
+    }
+}
+
+lift_sequences_4: {
+    options = { side_effects: true };
+    input: {
+        x = (foo, bar, baz);
+    }
+    expect: {
+        x = baz;
+    }
+}