From a16082c6a5f473b2a5290f85088ce721f2eba931 Mon Sep 17 00:00:00 2001
From: Simon Wanner <simon+git@skyrising.xyz>
Date: Mon, 30 Oct 2023 00:28:13 +0100
Subject: [PATCH] LibJS/JIT: Compile the HasPrivateId instruction

---
 Userland/Libraries/LibJS/Bytecode/Op.h    |  2 ++
 Userland/Libraries/LibJS/JIT/Compiler.cpp | 22 ++++++++++++++++++++++
 Userland/Libraries/LibJS/JIT/Compiler.h   |  3 ++-
 3 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/Userland/Libraries/LibJS/Bytecode/Op.h b/Userland/Libraries/LibJS/Bytecode/Op.h
index 56f12737f5..8eee7b7c11 100644
--- a/Userland/Libraries/LibJS/Bytecode/Op.h
+++ b/Userland/Libraries/LibJS/Bytecode/Op.h
@@ -645,6 +645,8 @@ public:
     ThrowCompletionOr<void> execute_impl(Bytecode::Interpreter&) const;
     DeprecatedString to_deprecated_string_impl(Bytecode::Executable const&) const;
 
+    IdentifierTableIndex property() const { return m_property; }
+
 private:
     IdentifierTableIndex m_property;
 };
diff --git a/Userland/Libraries/LibJS/JIT/Compiler.cpp b/Userland/Libraries/LibJS/JIT/Compiler.cpp
index 3bcb184850..9bf2d278d9 100644
--- a/Userland/Libraries/LibJS/JIT/Compiler.cpp
+++ b/Userland/Libraries/LibJS/JIT/Compiler.cpp
@@ -1596,6 +1596,28 @@ void Compiler::compile_get_new_target(Bytecode::Op::GetNewTarget const&)
     store_vm_register(Bytecode::Register::accumulator(), RET);
 }
 
+static Value cxx_has_private_id(VM& vm, Value object, DeprecatedFlyString const& identifier)
+{
+    if (!object.is_object())
+        TRY_OR_SET_EXCEPTION(vm.throw_completion<TypeError>(ErrorType::InOperatorWithObject));
+
+    auto private_environment = vm.running_execution_context().private_environment;
+    VERIFY(private_environment);
+    auto private_name = private_environment->resolve_private_identifier(identifier);
+    return Value(object.as_object().private_element_find(private_name) != nullptr);
+}
+
+void Compiler::compile_has_private_id(Bytecode::Op::HasPrivateId const& op)
+{
+    load_vm_register(ARG1, Bytecode::Register::accumulator());
+    m_assembler.mov(
+        Assembler::Operand::Register(ARG2),
+        Assembler::Operand::Imm(bit_cast<u64>(&m_bytecode_executable.get_identifier(op.property()))));
+    native_call((void*)cxx_has_private_id);
+    store_vm_register(Bytecode::Register::accumulator(), RET);
+    check_exception();
+}
+
 void Compiler::jump_to_exit()
 {
     m_assembler.jump(m_exit_label);
diff --git a/Userland/Libraries/LibJS/JIT/Compiler.h b/Userland/Libraries/LibJS/JIT/Compiler.h
index 852662714f..932dd01aca 100644
--- a/Userland/Libraries/LibJS/JIT/Compiler.h
+++ b/Userland/Libraries/LibJS/JIT/Compiler.h
@@ -131,7 +131,8 @@ private:
         O(GetImportMeta, get_import_meta)                                        \
         O(DeleteVariable, delete_variable)                                       \
         O(GetMethod, get_method)                                                 \
-        O(GetNewTarget, get_new_target)
+        O(GetNewTarget, get_new_target)                                          \
+        O(HasPrivateId, has_private_id)
 
 #    define DECLARE_COMPILE_OP(OpTitleCase, op_snake_case) \
         void compile_##op_snake_case(Bytecode::Op::OpTitleCase const&);