LibJS/JIT: Compile the GetMethod instruction

Userland/Libraries/LibJS/Bytecode/Op.h

@@ -1349,6 +1349,8 @@ 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;
 };

Userland/Libraries/LibJS/JIT/Compiler.cpp

@@ -1568,6 +1568,23 @@ void Compiler::compile_delete_variable(Bytecode::Op::DeleteVariable const& op)
     check_exception();
 }
 
+static Value cxx_get_method(VM& vm, Value value, DeprecatedFlyString const& identifier)
+{
+    auto method = TRY_OR_SET_EXCEPTION(value.get_method(vm, identifier));
+    return method ?: js_undefined();
+}
+
+void Compiler::compile_get_method(Bytecode::Op::GetMethod 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_get_method);
+    store_vm_register(Bytecode::Register::accumulator(), RET);
+    check_exception();
+}
+
 void Compiler::jump_to_exit()
 {
     m_assembler.jump(m_exit_label);

Userland/Libraries/LibJS/JIT/Compiler.h

@@ -129,7 +129,8 @@ private:
         O(PutPrivateById, put_private_by_id)                                     \
         O(ImportCall, import_call)                                               \
         O(GetImportMeta, get_import_meta)                                        \
-        O(DeleteVariable, delete_variable)
+        O(DeleteVariable, delete_variable)                                       \
+        O(GetMethod, get_method)
 
 #    define DECLARE_COMPILE_OP(OpTitleCase, op_snake_case) \
         void compile_##op_snake_case(Bytecode::Op::OpTitleCase const&);