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LibJS: Emit bytecode for function declaration instantiation

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By doing that all instructions required for instantiation are emitted
once in compilation and then reused for subsequent calls, instead of
running generic instantiation process for each call.
This commit is contained in:
Aliaksandr Kalenik
2024-05-05 22:06:55 +02:00
committed by Andreas Kling
parent 89a007327a
commit a4f70986a0
Notes: sideshowbarker 2024-07-17 10:31:19 +09:00 
Author: https://github.com/kalenikaliaksandr
Commit: https://github.com/SerenityOS/serenity/commit/a4f70986a0
Pull-request: https://github.com/SerenityOS/serenity/pull/24272
15 changed files with 440 additions and 449 deletions
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8
Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.h
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@@ -9,6 +9,7 @@
#pragma once
#include <LibJS/Bytecode/Generator.h>
#include <LibJS/Bytecode/Interpreter.h>
#include <LibJS/Runtime/ClassFieldDefinition.h>
#include <LibJS/Runtime/ExecutionContext.h>
#include <LibJS/Runtime/FunctionObject.h>
@@ -53,7 +54,7 @@ public:
void set_is_module_wrapper(bool b) { m_is_module_wrapper = b; }
Statement const& ecmascript_code() const { return m_ecmascript_code; }
Vector<FunctionParameter> const& formal_parameters() const { return m_formal_parameters; }
Vector<FunctionParameter> const& formal_parameters() const override { return m_formal_parameters; }
virtual DeprecatedFlyString const& name() const override { return m_name; }
void set_name(DeprecatedFlyString const& name);
@@ -98,6 +99,8 @@ public:
Variant<PropertyKey, PrivateName, Empty> const& class_field_initializer_name() const { return m_class_field_initializer_name; }
friend class Bytecode::Generator;
protected:
virtual bool is_strict_mode() const final { return m_strict; }
@@ -112,13 +115,10 @@ private:
ThrowCompletionOr<void> prepare_for_ordinary_call(ExecutionContext& callee_context, Object* new_target);
void ordinary_call_bind_this(ExecutionContext&, Value this_argument);
ThrowCompletionOr<void> function_declaration_instantiation();
DeprecatedFlyString m_name;
GCPtr<PrimitiveString> m_name_string;
GCPtr<Bytecode::Executable> m_bytecode_executable;
Vector<NonnullGCPtr<Bytecode::Executable>> m_default_parameter_bytecode_executables;
i32 m_function_length { 0 };
Vector<DeprecatedFlyString> m_local_variables_names;