Fix order to visit expression node

src/kyut/Comparator.inl.hpp

@@ -34,6 +34,8 @@ namespace wasm {
     }
 
     [[nodiscard]] inline bool operator<(const Expression &a, const Expression &b) {
+        static_assert(Expression::NumExpressionIds == 36);
+
         constexpr auto opt = [](const Expression *p) -> boost::optional<const Expression &> {
             if (p == nullptr) {
                 return boost::none;

src/kyut/watermarker/OperandSwappingWatermarker.cpp

@@ -156,9 +156,9 @@ namespace kyut::watermarker {
 
             SideEffect visitSelect(wasm::Select *expr) {
                 return (std::max)({
-                    visit(expr->condition),
                     visit(expr->ifTrue),
                     visit(expr->ifFalse),
+                    visit(expr->condition),
                 });
             }