From 55531e5cda9175c02dcc86cbaaef9cde856e82a3 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Mon, 26 Jun 2023 15:26:46 +0200
Subject: [PATCH] LibJS/Bytecode: Use LHS identifier as function name on
 logical assign

This now creates a function named `x`:

    x ||= function() { }

9 new passes on test262. :^)
---
 Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp b/Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
index f1826fcf1c..be7df5b9a9 100644
--- a/Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
+++ b/Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
@@ -493,7 +493,11 @@ Bytecode::CodeGenerationErrorOr<void> AssignmentExpression::generate_bytecode(By
     // if the logical assignment condition fails.
     auto lhs_reg = generator.allocate_register();
     generator.emit<Bytecode::Op::Store>(lhs_reg);
-    TRY(m_rhs->generate_bytecode(generator));
+
+    if (lhs->is_identifier())
+        TRY(generator.emit_named_evaluation_if_anonymous_function(*m_rhs, static_cast<Identifier const&>(*lhs).string()));
+    else
+        TRY(m_rhs->generate_bytecode(generator));
 
     switch (m_op) {
     case AssignmentOp::AdditionAssignment: