Swiftとメソッドのアレコレ

Swiftとメソッドのアレコレ
@tarunon
1

自己紹介
@tarunon
イカガチ勢 2015-09-26現在
ランク50 ウデマエS55
守備範囲: Swift, Objective-
C, JavaScript, Java, etc…
2

Resume
3
復習Objective-C
Swiftは何故速い？
struct/enum
アクセス修飾子
Any vs Generics
Protocol Extension
optional func
Closure

復習Objective-C
Objective-Cは動的言語
objc_msgSend
ランタイムAPI
5

objc_msgSend
6
Class
IMP
void aFunction(id self, SEL _cmd) {
…
}
SEL
処理はCの関数と同等のIMPに存在
IMPへの参照とSelectorの組を持つ

objc_msgSend
7
objc_msgSend
Object
SEL
Arguments
objc_msgSendが 
IMPを検索して実行する
高コスト！遅い！

objc_msgSend
8
「クリティカルな部分はCで書く」
「C++」

ランタイムAPI
9
クラスにメソッドを追加
クラスにプロパティを追加
Method Swizzling
クラスを追加

objc_msgSendの恩恵
10
クラスの継承
UIControl::addTarget:action:forControlEvents:
@optionalなメソッド(Protocol)
CoreData
モデルを定義するためにObjective-Cランタイ
ムを駆使

※LLVM中間コードが大量に出現します。ご注意下さい。

12
@interface A : NSObject
@property (nonatomic) NSString *str;
@property (nonatomic) NSInteger integer;
@end
@implementation A
- (void)function
{
}
@end

13
clang -S -emit-llvm source.m

14
@"OBJC_IVAR_$_A._str" = hidden global i64 8, section "__DATA, __objc_ivar", align 8
@"OBJC_IVAR_$_A._integer" = hidden global i64 16, section "__DATA, __objc_ivar", align 8
@_objc_empty_cache = external global %struct._objc_cache
@"OBJC_METACLASS_$_NSObject" = external global %struct._class_t
@OBJC_CLASS_NAME_ = private global [2 x i8] c"A00", section "__TEXT,__objc_classname,cstring_literals", align 1
@"01l_OBJC_METACLASS_RO_$_A" = private global %struct._class_ro_t { i32 1, i32 40, i32 40, i8* null, i8* getelementptr inbounds ([2 x i8]* @OBJC_CLASS_NAME_, i32 0, i32 0),
%struct.__method_list_t* null, %struct._objc_protocol_list* null, %struct._ivar_list_t* null, i8* null, %struct._prop_list_t* null }, section "__DATA, __objc_const", align 8
@"OBJC_METACLASS_$_A" = global %struct._class_t { %struct._class_t* @"OBJC_METACLASS_$_NSObject", %struct._class_t* @"OBJC_METACLASS_$_NSObject", %struct._objc_cache* @_objc_empty_cache,
i8* (i8*, i8*)** null, %struct._class_ro_t* @"01l_OBJC_METACLASS_RO_$_A" }, section "__DATA, __objc_data", align 8
@"OBJC_CLASS_$_NSObject" = external global %struct._class_t
@OBJC_METH_VAR_NAME_ = private global [9 x i8] c"function00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_ = private global [8 x i8] c"v16@0:800", section "__TEXT,__objc_methtype,cstring_literals", align 1
@OBJC_METH_VAR_NAME_1 = private global [4 x i8] c"str00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_2 = private global [8 x i8] c"@16@0:800", section "__TEXT,__objc_methtype,cstring_literals", align 1
@OBJC_METH_VAR_NAME_3 = private global [8 x i8] c"setStr:00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_4 = private global [11 x i8] c"v24@0:8@1600", section "__TEXT,__objc_methtype,cstring_literals", align 1
@OBJC_METH_VAR_NAME_5 = private global [8 x i8] c"integer00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_6 = private global [8 x i8] c"q16@0:800", section "__TEXT,__objc_methtype,cstring_literals", align 1
@OBJC_METH_VAR_NAME_7 = private global [12 x i8] c"setInteger:00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_8 = private global [11 x i8] c"v24@0:8q1600", section "__TEXT,__objc_methtype,cstring_literals", align 1
@"01l_OBJC_$_INSTANCE_METHODS_A" = private global { i32, i32, [5 x %struct._objc_method] } { i32 24, i32 5, [5 x %struct._objc_method] [%struct._objc_method { i8* getelementptr inbounds
([9 x i8]* @OBJC_METH_VAR_NAME_, i32 0, i32 0), i8* getelementptr inbounds ([8 x i8]* @OBJC_METH_VAR_TYPE_, i32 0, i32 0), i8* bitcast (void (%0*, i8*)* @"01-[A function]" to i8*) },
%struct._objc_method { i8* getelementptr inbounds ([4 x i8]* @OBJC_METH_VAR_NAME_1, i32 0, i32 0), i8* getelementptr inbounds ([8 x i8]* @OBJC_METH_VAR_TYPE_2, i32 0, i32 0), i8* bitcast
(%1* (%0*, i8*)* @"01-[A str]" to i8*) }, %struct._objc_method { i8* getelementptr inbounds ([8 x i8]* @OBJC_METH_VAR_NAME_3, i32 0, i32 0), i8* getelementptr inbounds ([11 x i8]*
@OBJC_METH_VAR_TYPE_4, i32 0, i32 0), i8* bitcast (void (%0*, i8*, %1*)* @"01-[A setStr:]" to i8*) }, %struct._objc_method { i8* getelementptr inbounds ([8 x i8]* @OBJC_METH_VAR_NAME_5,
i32 0, i32 0), i8* getelementptr inbounds ([8 x i8]* @OBJC_METH_VAR_TYPE_6, i32 0, i32 0), i8* bitcast (i64 (%0*, i8*)* @"01-[A integer]" to i8*) }, %struct._objc_method { i8*
getelementptr inbounds ([12 x i8]* @OBJC_METH_VAR_NAME_7, i32 0, i32 0), i8* getelementptr inbounds ([11 x i8]* @OBJC_METH_VAR_TYPE_8, i32 0, i32 0), i8* bitcast (void (%0*, i8*, i64)*
@"01-[A setInteger:]" to i8*) }] }, section "__DATA, __objc_const", align 8
@OBJC_METH_VAR_NAME_9 = private global [5 x i8] c"_str00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_10 = private global [12 x i8] c"@22NSString2200", section "__TEXT,__objc_methtype,cstring_literals", align 1
@OBJC_METH_VAR_NAME_11 = private global [9 x i8] c"_integer00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_12 = private global [2 x i8] c"q00", section "__TEXT,__objc_methtype,cstring_literals", align 1
@"01l_OBJC_$_INSTANCE_VARIABLES_A" = private global { i32, i32, [2 x %struct._ivar_t] } { i32 32, i32 2, [2 x %struct._ivar_t] [%struct._ivar_t { i64* @"OBJC_IVAR_$_A._str", i8*
getelementptr inbounds ([5 x i8]* @OBJC_METH_VAR_NAME_9, i32 0, i32 0), i8* getelementptr inbounds ([12 x i8]* @OBJC_METH_VAR_TYPE_10, i32 0, i32 0), i32 3, i32 8 }, %struct._ivar_t
{ i64* @"OBJC_IVAR_$_A._integer", i8* getelementptr inbounds ([9 x i8]* @OBJC_METH_VAR_NAME_11, i32 0, i32 0), i8* getelementptr inbounds ([2 x i8]* @OBJC_METH_VAR_TYPE_12, i32 0, i32
0), i32 3, i32 8 }] }, section "__DATA, __objc_const", align 8
@OBJC_PROP_NAME_ATTR_ = private global [4 x i8] c"str00", section "__TEXT,__cstring,cstring_literals", align 1
@OBJC_PROP_NAME_ATTR_13 = private global [21 x i8] c"T@22NSString22,N,V_str00", section "__TEXT,__cstring,cstring_literals", align 1
@OBJC_PROP_NAME_ATTR_14 = private global [8 x i8] c"integer00", section "__TEXT,__cstring,cstring_literals", align 1
@OBJC_PROP_NAME_ATTR_15 = private global [15 x i8] c"Tq,N,V_integer00", section "__TEXT,__cstring,cstring_literals", align 1
@"01l_OBJC_$_PROP_LIST_A" = private global { i32, i32, [2 x %struct._prop_t] } { i32 16, i32 2, [2 x %struct._prop_t] [%struct._prop_t { i8* getelementptr inbounds ([4 x i8]*
@OBJC_PROP_NAME_ATTR_, i32 0, i32 0), i8* getelementptr inbounds ([21 x i8]* @OBJC_PROP_NAME_ATTR_13, i32 0, i32 0) }, %struct._prop_t { i8* getelementptr inbounds ([8 x i8]*
@OBJC_PROP_NAME_ATTR_14, i32 0, i32 0), i8* getelementptr inbounds ([15 x i8]* @OBJC_PROP_NAME_ATTR_15, i32 0, i32 0) }] }, section "__DATA, __objc_const", align 8
@"01l_OBJC_CLASS_RO_$_A" = private global %struct._class_ro_t { i32 0, i32 8, i32 24, i8* null, i8* getelementptr inbounds ([2 x i8]* @OBJC_CLASS_NAME_, i32 0, i32 0),
%struct.__method_list_t* bitcast ({ i32, i32, [5 x %struct._objc_method] }* @"01l_OBJC_$_INSTANCE_METHODS_A" to %struct.__method_list_t*), %struct._objc_protocol_list* null,
%struct._ivar_list_t* bitcast ({ i32, i32, [2 x %struct._ivar_t] }* @"01l_OBJC_$_INSTANCE_VARIABLES_A" to %struct._ivar_list_t*), i8* null, %struct._prop_list_t* bitcast ({ i32, i32, [2
x %struct._prop_t] }* @"01l_OBJC_$_PROP_LIST_A" to %struct._prop_list_t*) }, section "__DATA, __objc_const", align 8
@"OBJC_CLASS_$_A" = global %struct._class_t { %struct._class_t* @"OBJC_METACLASS_$_A", %struct._class_t* @"OBJC_CLASS_$_NSObject", %struct._objc_cache* @_objc_empty_cache, i8* (i8*,
i8*)** null, %struct._class_ro_t* @"01l_OBJC_CLASS_RO_$_A" }, section "__DATA, __objc_data", align 8
@"OBJC_LABEL_CLASS_$" = private global [1 x i8*] [i8* bitcast (%struct._class_t* @"OBJC_CLASS_$_A" to i8*)], section "__DATA, __objc_classlist, regular, no_dead_strip", align 8

15
@"OBJC_IVAR_$_A._str" = hidden global i64 8, section "__DATA, __objc_ivar", align 8
@"OBJC_IVAR_$_A._integer" = hidden global i64 16, section "__DATA, __objc_ivar", align 8
@_objc_empty_cache = external global %struct._objc_cache
@"OBJC_METACLASS_$_NSObject" = external global %struct._class_t
@OBJC_CLASS_NAME_ = private global [2 x i8] c"A00", section "__TEXT,__objc_classname,cstring_literals", align 1
@"01l_OBJC_METACLASS_RO_$_A" = private global %struct._class_ro_t { i32 1, i32 40, i32 40, i8* null, i8* getelementptr inbounds ([2 x i8]* @OBJC_CLASS_NAME_, i32 0, i32 0),
%struct.__method_list_t* null, %struct._objc_protocol_list* null, %struct._ivar_list_t* null, i8* null, %struct._prop_list_t* null }, section "__DATA, __objc_const", align 8
@"OBJC_METACLASS_$_A" = global %struct._class_t { %struct._class_t* @"OBJC_METACLASS_$_NSObject", %struct._class_t* @"OBJC_METACLASS_$_NSObject", %struct._objc_cache* @_objc_empty_cache,
i8* (i8*, i8*)** null, %struct._class_ro_t* @"01l_OBJC_METACLASS_RO_$_A" }, section "__DATA, __objc_data", align 8
@"OBJC_CLASS_$_NSObject" = external global %struct._class_t
@OBJC_METH_VAR_NAME_ = private global [9 x i8] c"function00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_ = private global [8 x i8] c"v16@0:800", section "__TEXT,__objc_methtype,cstring_literals", align 1
@OBJC_METH_VAR_NAME_1 = private global [4 x i8] c"str00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_2 = private global [8 x i8] c"@16@0:800", section "__TEXT,__objc_methtype,cstring_literals", align 1
@OBJC_METH_VAR_NAME_3 = private global [8 x i8] c"setStr:00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_4 = private global [11 x i8] c"v24@0:8@1600", section "__TEXT,__objc_methtype,cstring_literals", align 1
@OBJC_METH_VAR_NAME_5 = private global [8 x i8] c"integer00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_6 = private global [8 x i8] c"q16@0:800", section "__TEXT,__objc_methtype,cstring_literals", align 1
@OBJC_METH_VAR_NAME_7 = private global [12 x i8] c"setInteger:00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_8 = private global [11 x i8] c"v24@0:8q1600", section "__TEXT,__objc_methtype,cstring_literals", align 1
@"01l_OBJC_$_INSTANCE_METHODS_A" = private global { i32, i32, [5 x %struct._objc_method] } { i32 24, i32 5, [5 x %struct._objc_method] [%struct._objc_method { i8* getelementptr inbounds
([9 x i8]* @OBJC_METH_VAR_NAME_, i32 0, i32 0), i8* getelementptr inbounds ([8 x i8]* @OBJC_METH_VAR_TYPE_, i32 0, i32 0), i8* bitcast (void (%0*, i8*)* @"01-[A function]" to i8*) },
%struct._objc_method { i8* getelementptr inbounds ([4 x i8]* @OBJC_METH_VAR_NAME_1, i32 0, i32 0), i8* getelementptr inbounds ([8 x i8]* @OBJC_METH_VAR_TYPE_2, i32 0, i32 0), i8* bitcast
(%1* (%0*, i8*)* @"01-[A str]" to i8*) }, %struct._objc_method { i8* getelementptr inbounds ([8 x i8]* @OBJC_METH_VAR_NAME_3, i32 0, i32 0), i8* getelementptr inbounds ([11 x i8]*
@OBJC_METH_VAR_TYPE_4, i32 0, i32 0), i8* bitcast (void (%0*, i8*, %1*)* @"01-[A setStr:]" to i8*) }, %struct._objc_method { i8* getelementptr inbounds ([8 x i8]* @OBJC_METH_VAR_NAME_5,
i32 0, i32 0), i8* getelementptr inbounds ([8 x i8]* @OBJC_METH_VAR_TYPE_6, i32 0, i32 0), i8* bitcast (i64 (%0*, i8*)* @"01-[A integer]" to i8*) }, %struct._objc_method { i8*
getelementptr inbounds ([12 x i8]* @OBJC_METH_VAR_NAME_7, i32 0, i32 0), i8* getelementptr inbounds ([11 x i8]* @OBJC_METH_VAR_TYPE_8, i32 0, i32 0), i8* bitcast (void (%0*, i8*, i64)*
@"01-[A setInteger:]" to i8*) }] }, section "__DATA, __objc_const", align 8
@OBJC_METH_VAR_NAME_9 = private global [5 x i8] c"_str00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_10 = private global [12 x i8] c"@22NSString2200", section "__TEXT,__objc_methtype,cstring_literals", align 1
@OBJC_METH_VAR_NAME_11 = private global [9 x i8] c"_integer00", section "__TEXT,__objc_methname,cstring_literals", align 1
@OBJC_METH_VAR_TYPE_12 = private global [2 x i8] c"q00", section "__TEXT,__objc_methtype,cstring_literals", align 1
@"01l_OBJC_$_INSTANCE_VARIABLES_A" = private global { i32, i32, [2 x %struct._ivar_t] } { i32 32, i32 2, [2 x %struct._ivar_t] [%struct._ivar_t { i64* @"OBJC_IVAR_$_A._str", i8*
getelementptr inbounds ([5 x i8]* @OBJC_METH_VAR_NAME_9, i32 0, i32 0), i8* getelementptr inbounds ([12 x i8]* @OBJC_METH_VAR_TYPE_10, i32 0, i32 0), i32 3, i32 8 }, %struct._ivar_t
{ i64* @"OBJC_IVAR_$_A._integer", i8* getelementptr inbounds ([9 x i8]* @OBJC_METH_VAR_NAME_11, i32 0, i32 0), i8* getelementptr inbounds ([2 x i8]* @OBJC_METH_VAR_TYPE_12, i32 0, i32
0), i32 3, i32 8 }] }, section "__DATA, __objc_const", align 8
@OBJC_PROP_NAME_ATTR_ = private global [4 x i8] c"str00", section "__TEXT,__cstring,cstring_literals", align 1
@OBJC_PROP_NAME_ATTR_13 = private global [21 x i8] c"T@22NSString22,N,V_str00", section "__TEXT,__cstring,cstring_literals", align 1
@OBJC_PROP_NAME_ATTR_14 = private global [8 x i8] c"integer00", section "__TEXT,__cstring,cstring_literals", align 1
@OBJC_PROP_NAME_ATTR_15 = private global [15 x i8] c"Tq,N,V_integer00", section "__TEXT,__cstring,cstring_literals", align 1
@"01l_OBJC_$_PROP_LIST_A" = private global { i32, i32, [2 x %struct._prop_t] } { i32 16, i32 2, [2 x %struct._prop_t] [%struct._prop_t { i8* getelementptr inbounds ([4 x i8]*
@OBJC_PROP_NAME_ATTR_, i32 0, i32 0), i8* getelementptr inbounds ([21 x i8]* @OBJC_PROP_NAME_ATTR_13, i32 0, i32 0) }, %struct._prop_t { i8* getelementptr inbounds ([8 x i8]*
@OBJC_PROP_NAME_ATTR_14, i32 0, i32 0), i8* getelementptr inbounds ([15 x i8]* @OBJC_PROP_NAME_ATTR_15, i32 0, i32 0) }] }, section "__DATA, __objc_const", align 8
@"01l_OBJC_CLASS_RO_$_A" = private global %struct._class_ro_t { i32 0, i32 8, i32 24, i8* null, i8* getelementptr inbounds ([2 x i8]* @OBJC_CLASS_NAME_, i32 0, i32 0),
%struct.__method_list_t* bitcast ({ i32, i32, [5 x %struct._objc_method] }* @"01l_OBJC_$_INSTANCE_METHODS_A" to %struct.__method_list_t*), %struct._objc_protocol_list* null,
%struct._ivar_list_t* bitcast ({ i32, i32, [2 x %struct._ivar_t] }* @"01l_OBJC_$_INSTANCE_VARIABLES_A" to %struct._ivar_list_t*), i8* null, %struct._prop_list_t* bitcast ({ i32, i32, [2
x %struct._prop_t] }* @"01l_OBJC_$_PROP_LIST_A" to %struct._prop_list_t*) }, section "__DATA, __objc_const", align 8
@"OBJC_CLASS_$_A" = global %struct._class_t { %struct._class_t* @"OBJC_METACLASS_$_A", %struct._class_t* @"OBJC_CLASS_$_NSObject", %struct._objc_cache* @_objc_empty_cache, i8* (i8*,
i8*)** null, %struct._class_ro_t* @"01l_OBJC_CLASS_RO_$_A" }, section "__DATA, __objc_data", align 8
@"OBJC_LABEL_CLASS_$" = private global [1 x i8*] [i8* bitcast (%struct._class_t* @"OBJC_CLASS_$_A" to i8*)], section "__DATA, __objc_classlist, regular, no_dead_strip", align 8
Selectorの宣言

16
%a = alloca %0*, align 8
%1 = load %struct._class_t** @"OBJC_CLASSLIST_REFERENCES_$_"
%2 = load i8** @OBJC_SELECTOR_REFERENCES_, !invariant.load !6
%3 = bitcast %struct._class_t* %1 to i8*
%4 = call i8* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i8* (i8*, i8*)*)(i8* %3,
i8* %2)
%5 = bitcast i8* %4 to %0*
store %0* %5, %0** %a, align 8
%6 = load %0** %a, align 8
%7 = load i8** @OBJC_SELECTOR_REFERENCES_17, !invariant.load !6
%8 = bitcast %0* %6 to i8*
call void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to void (i8*, i8*)*)(i8* %8, i8*
%7)
ret i32 0

17
call void bitcast (i8* (i8*, i8*, ...)*
@objc_msgSend to void (i8*, i8*)*)(i8*
%8, i8* %7)

18
class A {
var str: String?
var int: Int?
func function() {
}
}

19
swiftc -emit-ir source.swift > source.ll

20
@_TMnC6source1A = constant { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 } { i64 0, i8* getelementptr
inbounds ([11 x i8]* @4, i64 0, i64 0), i32 2, i32 17, i8* getelementptr inbounds ([9 x i8]* @5, i64 0, i64 0), %swift.type** (%swift.type*)*
@get_field_types_A, %swift.type_pattern* null, i32 0, i32 0, i32 0 }
@_TWoFC6source1Ag3strGSqSS_ = constant i64 88, align 8
@_TWoFC6source1As3strGSqSS_ = constant i64 96, align 8
@_TWoFC6source1Am3strGSqSS_ = constant i64 104, align 8
@_TWoFC6source1Ag3intGSqSi_ = constant i64 112, align 8
@_TWoFC6source1As3intGSqSi_ = constant i64 120, align 8
@_TWoFC6source1Am3intGSqSi_ = constant i64 128, align 8
@_TWoFC6source1A8functionfS0_FT_T_ = constant i64 136, align 8
@_TWoFC6source1ACfMS0_FT_S0_ = constant i64 144, align 8
@_TMLC6source1A = global %swift.type* null, align 8
@_TMdC6source1A = global { void (%C6source1A*)*, i8**, i64, %objc_class*, %swift.opaque*, %swift.opaque*, i64, i32, i32, i32, i16, i16, i32, i32, { i64,
i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 }*, void (%Sq*, %C6source1A*)*, void (%Sq*, %C6source1A*)*,
{ i8*, i64 } (i8*, [24 x i8]*, %C6source1A*)*, { i64, i1 } (%C6source1A*)*, void (i64, i1, %C6source1A*)*, { i8*, i64 } (i8*, [24 x i8]*,
%C6source1A*)*, void (%C6source1A*)*, %C6source1A* (%C6source1A*)*, i64, i64 } { void (%C6source1A*)* @_TFC6source1AD, i8** @_TWVBo, i64 ptrtoint
(%objc_class* @_TMmC6source1A to i64), %objc_class* @"OBJC_CLASS_$_SwiftObject", %swift.opaque* @_objc_empty_cache, %swift.opaque* @_objc_empty_vtable,
i64 add (i64 ptrtoint ({ i32, i32, i32, i32, i8*, i8*, i8*, i8*, { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] }*, i8*, i8* }* @_DATA__TtC6source1A to
i64), i64 1), i32 3, i32 0, i32 57, i16 7, i16 0, i32 168, i32 16, { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32,
i32, i32 }* @_TMnC6source1A, void (%Sq*, %C6source1A*)* @_TFC6source1Ag3strGSqSS_, void (%Sq*, %C6source1A*)* @_TFC6source1As3strGSqSS_, { i8*, i64 }
(i8*, [24 x i8]*, %C6source1A*)* @_TFC6source1Am3strGSqSS_, { i64, i1 } (%C6source1A*)* @_TFC6source1Ag3intGSqSi_, void (i64, i1, %C6source1A*)*
@_TFC6source1As3intGSqSi_, { i8*, i64 } (i8*, [24 x i8]*, %C6source1A*)* @_TFC6source1Am3intGSqSi_, void (%C6source1A*)*
@_TFC6source1A8functionfS0_FT_T_, %C6source1A* (%C6source1A*)* @_TFC6source1AcfMS0_FT_S0_, i64 16, i64 48 }

21
@_TMnC6source1A = constant { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 } { i64 0, i8* getelementptr
@_TMdC6source1A = global { void (%C6source1A*)*, i8**, i64, %objc_class*, %swift.opaque*, %swift.opaque*, i64, i32, i32, i32, i16, i16, i32, i32, { i64,
i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 }*, void (%Sq*, %C6source1A*)*, void (%Sq*, %C6source1A*)*,
{ i8*, i64 } (i8*, [24 x i8]*, %C6source1A*)*, { i64, i1 } (%C6source1A*)*, void (i64, i1, %C6source1A*)*, { i8*, i64 } (i8*, [24 x i8]*,
%C6source1A*)*, void (%C6source1A*)*, %C6source1A* (%C6source1A*)*, i64, i64 } { void (%C6source1A*)* @_TFC6source1AD, i8** @_TWVBo, i64 ptrtoint
(%objc_class* @_TMmC6source1A to i64), %objc_class* @"OBJC_CLASS_$_SwiftObject", %swift.opaque* @_objc_empty_cache, %swift.opaque* @_objc_empty_vtable,
i64 add (i64 ptrtoint ({ i32, i32, i32, i32, i8*, i8*, i8*, i8*, { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] }*, i8*, i8* }* @_DATA__TtC6source1A to
i64), i64 1), i32 3, i32 0, i32 57, i16 7, i16 0, i32 168, i32 16, { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32,
i32, i32 }* @_TMnC6source1A, void (%Sq*, %C6source1A*)* @_TFC6source1Ag3strGSqSS_, void (%Sq*, %C6source1A*)* @_TFC6source1As3strGSqSS_, { i8*, i64 }
(i8*, [24 x i8]*, %C6source1A*)* @_TFC6source1Am3strGSqSS_, { i64, i1 } (%C6source1A*)* @_TFC6source1Ag3intGSqSi_, void (i64, i1, %C6source1A*)*
@_TFC6source1As3intGSqSi_, { i8*, i64 } (i8*, [24 x i8]*, %C6source1A*)* @_TFC6source1Am3intGSqSi_, void (%C6source1A*)*
@_TFC6source1A8functionfS0_FT_T_, %C6source1A* (%C6source1A*)* @_TFC6source1AcfMS0_FT_S0_, i64 16, i64 48 }
vtable

22
store i8* %2, i8** getelementptr inbounds (%VSs20UnsafeMutablePointer* @_TZvOSs7Process11_unsafeArgvGVSs20UnsafeMutablePointerGS0_VSs4Int8__, i32 0,
i32 0), align 8
%5 = call %swift.type* @_TMaC6source1A() #2
%6 = call %C6source1A* @_TFC6source1ACfMS0_FT_S0_(%swift.type* %5)
store %C6source1A* %6, %C6source1A** @_Tv6source1aCS_1A, align 8
%7 = load %C6source1A** @_Tv6source1aCS_1A, align 8
%8 = bitcast %C6source1A* %7 to %swift.refcounted*
call void @swift_retain_noresult(%swift.refcounted* %8) #3
%9 = bitcast %C6source1A* %7 to %swift.type**
%.metadata = load %swift.type** %9, align 8
%10 = bitcast %swift.type* %.metadata to void (%C6source1A*)**
%11 = getelementptr inbounds void (%C6source1A*)** %10, i64 9
%.metadata1 = load void (%C6source1A*)** %11, align 8, !invariant.load !29
%12 = bitcast void (%C6source1A*)* %.metadata1 to i8*
%13 = bitcast i8* %12 to void (%C6source1A*)*
call void %13(%C6source1A* %7)
call void bitcast (void (%swift.refcounted*)* @swift_release to void (%C6source1A*)*)(%C6source1A* %7) #3
ret i32 0

23
store i8* %2, i8** getelementptr inbounds
(%VSs20UnsafeMutablePointer* @
%8 = bitcast %C6source1A* %7 to %swift.refcounted*
%9 = bitcast %C6source1A* %7 to %swift.type**
%10 = bitcast %swift.type* %.metadata to void (%C6source1A*)**
%.metadata1 = load void (%C6source1A*)** %11, align 8,
%12 = bitcast void (%C6source1A*)* %.metadata1 to i8*

24
%11 = getelementptr inbounds void
(%C6source1A*)** %10, i64 9

25
class A: NSObject {
var str: String?
var int: Int?
func function() {
}
}

26
@8 = private unnamed_addr constant [14 x i8] c"_TtC6source1A00"
@_METACLASS_DATA__TtC6source1A = private constant { i32, i32, i32, i32, i8*, i8*, i8*, i8*, i8*, i8*, i8* } { i32 129, i32 40, i32 40, i32 0, i8* null, i8*
getelementptr inbounds ([14 x i8]* @8, i64 0, i64 0), i8* null, i8* null, i8* null, i8* null, i8* null }, section "__DATA, __objc_const", align 8
@_INSTANCE_METHODS__TtC6source1A = private constant { i32, i32, [5 x { i8*, i8*, i8* }] } { i32 24, i32 5, [5 x { i8*, i8*, i8* }] [{ i8*, i8*, i8* } { i8*
getelementptr inbounds ([4 x i8]* @"01L_selector_data(str)", i64 0, i64 0), i8* getelementptr inbounds ([8 x i8]* @3, i64 0, i64 0), i8* bitcast (%0* (%1*, i8*)*
@_TToFC6source1Ag3strGSqSS_ to i8*) }, { i8*, i8*, i8* } { i8* getelementptr inbounds ([8 x i8]* @"01L_selector_data(setStr:)", i64 0, i64 0), i8* getelementptr
inbounds ([11 x i8]* @4, i64 0, i64 0), i8* bitcast (void (%1*, i8*, %0*)* @_TToFC6source1As3strGSqSS_ to i8*) }, { i8*, i8*, i8* } { i8* getelementptr inbounds ([9 x
i8]* @"01L_selector_data(function)", i64 0, i64 0), i8* getelementptr inbounds ([8 x i8]* @6, i64 0, i64 0), i8* bitcast (void (%1*, i8*)*
@_TToFC6source1A8functionfS0_FT_T_ to i8*) }, { i8*, i8*, i8* } { i8* getelementptr inbounds ([5 x i8]* @"01L_selector_data(init)", i64 0, i64 0), i8* getelementptr
inbounds ([8 x i8]* @3, i64 0, i64 0), i8* bitcast (%1* (%1*, i8*)* @_TToFC6source1AcfMS0_FT_S0_ to i8*) }, { i8*, i8*, i8* } { i8* getelementptr inbounds ([14 x i8]*
@"01L_selector_data(.cxx_destruct)", i64 0, i64 0), i8* getelementptr inbounds ([3 x i8]* @7, i64 0, i64 0), i8* bitcast (void (%1*, i8*)* @_TToFC6source1AE to i8*) }]
}, section "__DATA, __objc_const", align 8
@_IVARS__TtC6source1A = private constant { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] } { i32 32, i32 2, [2 x { i64*, i8*, i8*, i32, i32 }] [{ i64*, i8*, i8*, i32,
i32 } { i64* @_TWvdvC6source1A3strGSqSS_, i8* getelementptr inbounds ([4 x i8]* @0, i64 0, i64 0), i8* getelementptr inbounds ([1 x i8]* @1, i64 0, i64 0), i32 3, i32
25 }, { i64*, i8*, i8*, i32, i32 } { i64* @_TWvdvC6source1A3intGSqSi_, i8* getelementptr inbounds ([4 x i8]* @5, i64 0, i64 0), i8* getelementptr inbounds ([1 x i8]*
@1, i64 0, i64 0), i32 3, i32 9 }] }, section "__DATA, __objc_const", align 8
@_PROPERTIES__TtC6source1A = private constant { i32, i32, [1 x { i8*, i8* }] } { i32 16, i32 1, [1 x { i8*, i8* }] [{ i8*, i8* } { i8* getelementptr inbounds ([4 x i8]*
@0, i64 0, i64 0), i8* getelementptr inbounds ([22 x i8]* @2, i64 0, i64 0) }] }, section "__DATA, __objc_const", align 8
@_DATA__TtC6source1A = private constant { i32, i32, i32, i32, i8*, i8*, { i32, i32, [5 x { i8*, i8*, i8* }] }*, i8*, { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] }*,
i8*, { i32, i32, [1 x { i8*, i8* }] }* } { i32 388, i32 16, i32 57, i32 0, i8* null, i8* getelementptr inbounds ([14 x i8]* @8, i64 0, i64 0), { i32, i32, [5 x { i8*,
i8*, i8* }] }* @_INSTANCE_METHODS__TtC6source1A, i8* null, { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] }* @_IVARS__TtC6source1A, i8* null, { i32, i32, [1 x { i8*,
i8* }] }* @_PROPERTIES__TtC6source1A }, section "__DATA, __objc_const", align 8
@9 = private unnamed_addr constant [11 x i8] c"C6source1A00"
@10 = private unnamed_addr constant [9 x i8] c"str00int0000"
@_TMnC6source1A = constant { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 } { i64 0, i8* getelementptr inbounds ([11 x
i8]* @9, i64 0, i64 0), i32 2, i32 17, i8* getelementptr inbounds ([9 x i8]* @10, i64 0, i64 0), %swift.type** (%swift.type*)* @get_field_types_A, %swift.type_pattern*
null, i32 0, i32 0, i32 0 }
@_TMdC6source1A = global { void (%C6source1A*)*, i8**, i64, %objc_class*, %swift.opaque*, %swift.opaque*, i64, i32, i32, i32, i16, i16, i32, i32, { i64, i8*, i32, i32,
i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 }*, void (%Sq.16*, %C6source1A*)*, void (%Sq.16*, %C6source1A*)*, { i8*, i64 } (i8*, [24 x i8]*,
%C6source1A*)*, { i64, i1 } (%C6source1A*)*, void (i64, i1, %C6source1A*)*, { i8*, i64 } (i8*, [24 x i8]*, %C6source1A*)*, void (%C6source1A*)*, %C6source1A*
(%C6source1A*)*, i64, i64 } { void (%C6source1A*)* @_TFC6source1AD, i8** @_TWVBO, i64 ptrtoint (%objc_class* @"OBJC_METACLASS_$__TtC6source1A" to i64), %objc_class*
@"OBJC_CLASS_$_NSObject", %swift.opaque* @_objc_empty_cache, %swift.opaque* @_objc_empty_vtable, i64 add (i64 ptrtoint ({ i32, i32, i32, i32, i8*, i8*, { i32, i32, [5 x
{ i8*, i8*, i8* }] }*, i8*, { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] }*, i8*, { i32, i32, [1 x { i8*, i8* }] }* }* @_DATA__TtC6source1A to i64), i64 1), i32 1,
i32 0, i32 57, i16 7, i16 0, i32 168, i32 16, { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 }* @_TMnC6source1A, void
(%Sq.16*, %C6source1A*)* @_TFC6source1Ag3strGSqSS_, void (%Sq.16*, %C6source1A*)* @_TFC6source1As3strGSqSS_, { i8*, i64 } (i8*, [24 x i8]*, %C6source1A*)*
@_TFC6source1Am3strGSqSS_, { i64, i1 } (%C6source1A*)* @_TFC6source1Ag3intGSqSi_, void (i64, i1, %C6source1A*)* @_TFC6source1As3intGSqSi_, { i8*, i64 } (i8*, [24 x
i8]*, %C6source1A*)* @_TFC6source1Am3intGSqSi_, void (%C6source1A*)* @_TFC6source1A8functionfS0_FT_T_, %C6source1A* (%C6source1A*)* @_TFC6source1AcfMS0_FT_S0_, i64 16,
i64 48 }, section "__DATA,__objc_data, regular, no_dead_strip"

27
@_METACLASS_DATA__TtC6source1A = private constant { i32, i32, i32, i32, i8*, i8*, i8*, i8*, i8*, i8*, i8* } { i32 129, i32 40, i32 40, i32 0, i8* null, i8*
getelementptr inbounds ([14 x i8]* @8, i64 0, i64 0), i8* null, i8* null, i8* null, i8* null, i8* null }, section "__DATA, __objc_const", align 8
@_INSTANCE_METHODS__TtC6source1A = private constant { i32, i32, [5 x { i8*, i8*, i8* }] } { i32 24, i32 5, [5 x { i8*, i8*, i8* }] [{ i8*, i8*, i8* } { i8*
getelementptr inbounds ([4 x i8]* @"01L_selector_data(str)", i64 0, i64 0), i8* getelementptr inbounds ([8 x i8]* @3, i64 0, i64 0), i8* bitcast (%0* (%1*, i8*)*
@_TToFC6source1Ag3strGSqSS_ to i8*) }, { i8*, i8*, i8* } { i8* getelementptr inbounds ([8 x i8]* @"01L_selector_data(setStr:)", i64 0, i64 0), i8* getelementptr
inbounds ([11 x i8]* @4, i64 0, i64 0), i8* bitcast (void (%1*, i8*, %0*)* @_TToFC6source1As3strGSqSS_ to i8*) }, { i8*, i8*, i8* } { i8* getelementptr inbounds ([9 x
i8]* @"01L_selector_data(function)", i64 0, i64 0), i8* getelementptr inbounds ([8 x i8]* @6, i64 0, i64 0), i8* bitcast (void (%1*, i8*)*
@_TToFC6source1A8functionfS0_FT_T_ to i8*) }, { i8*, i8*, i8* } { i8* getelementptr inbounds ([5 x i8]* @"01L_selector_data(init)", i64 0, i64 0), i8* getelementptr
inbounds ([8 x i8]* @3, i64 0, i64 0), i8* bitcast (%1* (%1*, i8*)* @_TToFC6source1AcfMS0_FT_S0_ to i8*) }, { i8*, i8*, i8* } { i8* getelementptr inbounds ([14 x i8]*
@"01L_selector_data(.cxx_destruct)", i64 0, i64 0), i8* getelementptr inbounds ([3 x i8]* @7, i64 0, i64 0), i8* bitcast (void (%1*, i8*)* @_TToFC6source1AE to i8*) }]
}, section "__DATA, __objc_const", align 8
@_IVARS__TtC6source1A = private constant { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] } { i32 32, i32 2, [2 x { i64*, i8*, i8*, i32, i32 }] [{ i64*, i8*, i8*, i32,
i32 } { i64* @_TWvdvC6source1A3strGSqSS_, i8* getelementptr inbounds ([4 x i8]* @0, i64 0, i64 0), i8* getelementptr inbounds ([1 x i8]* @1, i64 0, i64 0), i32 3, i32
25 }, { i64*, i8*, i8*, i32, i32 } { i64* @_TWvdvC6source1A3intGSqSi_, i8* getelementptr inbounds ([4 x i8]* @5, i64 0, i64 0), i8* getelementptr inbounds ([1 x i8]*
@1, i64 0, i64 0), i32 3, i32 9 }] }, section "__DATA, __objc_const", align 8
@_PROPERTIES__TtC6source1A = private constant { i32, i32, [1 x { i8*, i8* }] } { i32 16, i32 1, [1 x { i8*, i8* }] [{ i8*, i8* } { i8* getelementptr inbounds ([4 x i8]*
@0, i64 0, i64 0), i8* getelementptr inbounds ([22 x i8]* @2, i64 0, i64 0) }] }, section "__DATA, __objc_const", align 8
@_DATA__TtC6source1A = private constant { i32, i32, i32, i32, i8*, i8*, { i32, i32, [5 x { i8*, i8*, i8* }] }*, i8*, { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] }*,
i8*, { i32, i32, [1 x { i8*, i8* }] }* } { i32 388, i32 16, i32 57, i32 0, i8* null, i8* getelementptr inbounds ([14 x i8]* @8, i64 0, i64 0), { i32, i32, [5 x { i8*,
i8*, i8* }] }* @_INSTANCE_METHODS__TtC6source1A, i8* null, { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] }* @_IVARS__TtC6source1A, i8* null, { i32, i32, [1 x { i8*,
i8* }] }* @_PROPERTIES__TtC6source1A }, section "__DATA, __objc_const", align 8
@_TMnC6source1A = constant { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 } { i64 0, i8* getelementptr inbounds ([11 x
i8]* @9, i64 0, i64 0), i32 2, i32 17, i8* getelementptr inbounds ([9 x i8]* @10, i64 0, i64 0), %swift.type** (%swift.type*)* @get_field_types_A, %swift.type_pattern*
null, i32 0, i32 0, i32 0 }
@_TMdC6source1A = global { void (%C6source1A*)*, i8**, i64, %objc_class*, %swift.opaque*, %swift.opaque*, i64, i32, i32, i32, i16, i16, i32, i32, { i64, i8*, i32, i32,
i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 }*, void (%Sq.16*, %C6source1A*)*, void (%Sq.16*, %C6source1A*)*, { i8*, i64 } (i8*, [24 x i8]*,
%C6source1A*)*, { i64, i1 } (%C6source1A*)*, void (i64, i1, %C6source1A*)*, { i8*, i64 } (i8*, [24 x i8]*, %C6source1A*)*, void (%C6source1A*)*, %C6source1A*
(%C6source1A*)*, i64, i64 } { void (%C6source1A*)* @_TFC6source1AD, i8** @_TWVBO, i64 ptrtoint (%objc_class* @"OBJC_METACLASS_$__TtC6source1A" to i64), %objc_class*
@"OBJC_CLASS_$_NSObject", %swift.opaque* @_objc_empty_cache, %swift.opaque* @_objc_empty_vtable, i64 add (i64 ptrtoint ({ i32, i32, i32, i32, i8*, i8*, { i32, i32, [5 x
{ i8*, i8*, i8* }] }*, i8*, { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] }*, i8*, { i32, i32, [1 x { i8*, i8* }] }* }* @_DATA__TtC6source1A to i64), i64 1), i32 1,
i32 0, i32 57, i16 7, i16 0, i32 168, i32 16, { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 }* @_TMnC6source1A, void
(%Sq.16*, %C6source1A*)* @_TFC6source1Ag3strGSqSS_, void (%Sq.16*, %C6source1A*)* @_TFC6source1As3strGSqSS_, { i8*, i64 } (i8*, [24 x i8]*, %C6source1A*)*
@_TFC6source1Am3strGSqSS_, { i64, i1 } (%C6source1A*)* @_TFC6source1Ag3intGSqSi_, void (i64, i1, %C6source1A*)* @_TFC6source1As3intGSqSi_, { i8*, i64 } (i8*, [24 x
i8]*, %C6source1A*)* @_TFC6source1Am3intGSqSi_, void (%C6source1A*)* @_TFC6source1A8functionfS0_FT_T_, %C6source1A* (%C6source1A*)* @_TFC6source1AcfMS0_FT_S0_, i64 16,
i64 48 }, section "__DATA,__objc_data, regular, no_dead_strip"
Selectorの宣言
vtable

28
i32 0), align 8
%8 = call %C6source1A* bitcast (%objc_object* (%objc_object*)* @objc_retain to %C6source1A* (%C6source1A*)*)(%C6source1A* %7) #3
%9 = bitcast %C6source1A* %7 to i64*
%10 = load i64* %9, align 8
%11 = load i64* @swift_isaMask, align 8
%12 = and i64 %10, %11
%13 = inttoptr i64 %12 to %swift.type*
%14 = bitcast %swift.type* %13 to void (%C6source1A*)**
%16 = load void (%C6source1A*)** %15, align 8, !invariant.load !29
%17 = bitcast void (%C6source1A*)* %16 to i8*
call void bitcast (void (%objc_object*)* @objc_release to void (%C6source1A*)*)(%C6source1A* %7) #3
ret i32 0

29
i32 0), align 8
%8 = call %C6source1A* bitcast (%objc_object* (%objc_object*)* @objc_retain to %C6source1A* (%C6source1A*)*)(%C6source1A* %7) #3
%10 = load i64* %9, align 8
%12 = and i64 %10, %11
ret i32 0
objc_msgSendではない

classメソッドの呼び出しが
objc_msgSendからvtableに変更されパ
フォーマンスが向上した
NSObjectを継承すると、objc_msgSend
が使用できる状態になるが、vtableも存
在し、vtableが優先的に使用される
30

vtableを利用しているため、ランタ
イムAPIを使ったテクニックの幾つか
が使えなくなっていることに注意
Method SwizzlingはSwift製の 
クラスには無効
31

struct/enum
33
struct A {
var str: String?
var int: Int?
func function() {
}
}

34
struct/enum

struct/enum
35
@_Tv6source1aVS_1A = global %V6source1A zeroinitializer, align 8
@_TZvOSs7Process5_argcVSs5Int32 = external global %VSs5Int32, align 4
@globalinit_33_1BDF70FFC18749BAB495A73B459ED2F0_token6 = external global i64, align 8
@_TZvOSs7Process11_unsafeArgvGVSs20UnsafeMutablePointerGS0_VSs4Int8__ = external global %VSs20UnsafeMutablePointer, align 8
@_TWVV6source1A = constant [20 x i8*] [i8* bitcast (void ([24 x i8]*, %swift.type*)* @_TwXXV6source1A to i8*), i8* bitcast (%swift.opaque* ([24 x i8]*,
[24 x i8]*, %swift.type*)* @_TwCPV6source1A to i8*), i8* bitcast (%swift.opaque* ([24 x i8]*, %swift.type*)* @_TwprV6source1A to i8*), i8* bitcast (void
([24 x i8]*, %swift.type*)* @_TwdeV6source1A to i8*), i8* bitcast (void (%swift.opaque*, %swift.type*)* @_TwxxV6source1A to i8*), i8* bitcast
(%swift.opaque* ([24 x i8]*, %swift.opaque*, %swift.type*)* @_TwCpV6source1A to i8*), i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*,
%swift.type*)* @_TwcpV6source1A to i8*), i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*, %swift.type*)* @_TwcaV6source1A to i8*), i8*
bitcast (%swift.opaque* ([24 x i8]*, %swift.opaque*, %swift.type*)* @_TwTkV6source1A to i8*), i8* bitcast (i8* (i8*, i8*, %swift.type*)*
@__swift_memcpy41_8 to i8*), i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*, %swift.type*)* @_TwtaV6source1A to i8*), i8* bitcast
(%swift.opaque* ([24 x i8]*, %swift.type*)* @_TwalV6source1A to i8*), i8* bitcast (i8* (i8**, i8**, %swift.type*)* @__swift_copy_outline_pointer to
i8*), i8* bitcast (void (%swift.opaque*, i64, %swift.type*)* @_TwXxV6source1A to i8*), i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*, i64,
%swift.type*)* @_TwCcV6source1A to i8*), i8* bitcast (i8* (i8*, i8*, i64, %swift.type*)* @__swift_memmove_array48_8 to i8*), i8* bitcast (i8* (i8*, i8*,
i64, %swift.type*)* @__swift_memmove_array48_8 to i8*), i8* inttoptr (i64 41 to i8*), i8* inttoptr (i64 196615 to i8*), i8* inttoptr (i64 48 to i8*)]
@0 = private unnamed_addr constant [11 x i8] c"V6source1A00"
@_TMnV6source1A = constant { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 } { i64 1, i8* getelementptr
@_TMdV6source1A = constant { i8**, i64, { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 }*, %swift.type*,
i64, i64 } { i8** getelementptr inbounds ([20 x i8*]* @_TWVV6source1A, i32 0, i32 0), i64 1, { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*,
%swift.type_pattern*, i32, i32, i32 }* @_TMnV6source1A, %swift.type* null, i64 0, i64 32 }

struct/enum
36
@_Tv6source1aVS_1A = global %V6source1A zeroinitializer, align 8
@_TWVV6source1A = constant [20 x i8*] [i8* bitcast (void ([24 x i8]*, %swift.type*)* @_TwXXV6source1A to i8*), i8* bitcast (%swift.opaque* ([24 x i8]*,
[24 x i8]*, %swift.type*)* @_TwCPV6source1A to i8*), i8* bitcast (%swift.opaque* ([24 x i8]*, %swift.type*)* @_TwprV6source1A to i8*), i8* bitcast (void
([24 x i8]*, %swift.type*)* @_TwdeV6source1A to i8*), i8* bitcast (void (%swift.opaque*, %swift.type*)* @_TwxxV6source1A to i8*), i8* bitcast
(%swift.opaque* ([24 x i8]*, %swift.opaque*, %swift.type*)* @_TwCpV6source1A to i8*), i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*,
%swift.type*)* @_TwcpV6source1A to i8*), i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*, %swift.type*)* @_TwcaV6source1A to i8*), i8*
bitcast (%swift.opaque* ([24 x i8]*, %swift.opaque*, %swift.type*)* @_TwTkV6source1A to i8*), i8* bitcast (i8* (i8*, i8*, %swift.type*)*
@__swift_memcpy41_8 to i8*), i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*, %swift.type*)* @_TwtaV6source1A to i8*), i8* bitcast
(%swift.opaque* ([24 x i8]*, %swift.type*)* @_TwalV6source1A to i8*), i8* bitcast (i8* (i8**, i8**, %swift.type*)* @__swift_copy_outline_pointer to
i8*), i8* bitcast (void (%swift.opaque*, i64, %swift.type*)* @_TwXxV6source1A to i8*), i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*, i64,
%swift.type*)* @_TwCcV6source1A to i8*), i8* bitcast (i8* (i8*, i8*, i64, %swift.type*)* @__swift_memmove_array48_8 to i8*), i8* bitcast (i8* (i8*, i8*,
i64, %swift.type*)* @__swift_memmove_array48_8 to i8*), i8* inttoptr (i64 41 to i8*), i8* inttoptr (i64 196615 to i8*), i8* inttoptr (i64 48 to i8*)]
@0 = private unnamed_addr constant [11 x i8] c"V6source1A00"
@_TMnV6source1A = constant { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 } { i64 1, i8* getelementptr
@_TMdV6source1A = constant { i8**, i64, { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 }*, %swift.type*,
i64, i64 } { i8** getelementptr inbounds ([20 x i8*]* @_TWVV6source1A, i32 0, i32 0), i64 1, { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*,
%swift.type_pattern*, i32, i32, i32 }* @_TMnV6source1A, %swift.type* null, i64 0, i64 32 }
functionの記述が存在しない

struct/enum
37
define hidden void @_TFV6source1A8functionfS0_FT_T_(%V6source1A* noalias nocapture dereferenceable(41)) #0 {
entry:
%.str = getelementptr inbounds %V6source1A* %0, i32 0, i32 0
%1 = bitcast %Sq* %.str to { i64, i64, i64 }*
%2 = getelementptr inbounds { i64, i64, i64 }* %1, i32 0, i32 0
%3 = load i64* %2, align 8
%5 = load i64* %4, align 8
%7 = load i64* %6, align 8
%8 = getelementptr inbounds %Sq* %.str, i32 0, i32 1
%9 = bitcast [1 x i8]* %8 to i1*
%10 = load i1* %9, align 8
%.int = getelementptr inbounds %V6source1A* %0, i32 0, i32 2
%11 = bitcast %Sq.17* %.int to i64*
%12 = load i64* %11, align 8
%13 = getelementptr inbounds %Sq.17* %.int, i32 0, i32 1
%14 = bitcast [1 x i8]* %13 to i1*
%15 = load i1* %14, align 8
ret void
}

struct/enum
38
store i64 %21, i64* %32, align 8
store i64 %22, i64* %33, align 8
store i64 %23, i64* %34, align 8
%36 = bitcast [1 x i8]* %35 to i1*
store i1 %24, i1* %36, align 8
store i64 %25, i64* %37, align 8
%39 = bitcast [1 x i8]* %38 to i1*
call void @_TFV6source1A8functionfS0_FT_T_(%V6source1A* noalias nocapture dereferenceable(41) %2)
br i1 %24, label %43, label %40

struct/enum
39
store i64 %21, i64* %32, align 8
store i64 %22, i64* %33, align 8
store i64 %23, i64* %34, align 8
%36 = bitcast [1 x i8]* %35 to i1*
store i64 %25, i64* %37, align 8
%39 = bitcast [1 x i8]* %38 to i1*
call void @_TFV6source1A8functionfS0_FT_T_(%V6source1A* noalias nocapture dereferenceable(41) %2)
br i1 %24, label %43, label %40
関数を直接実行している

struct/enum
40
struct/enumのメソッドはただの関数への
エイリアス
selfを利用する際にコピーが発生しない
vtableよりも高パフォーマンス
struct/enumは値型であるため、事ある毎
にコピーのコストが発生する

Swiftのアクセス修飾子は3種類
public
internal
private
classにはﬁnal修飾子もある
classメソッドの実行方法が変化
42

Swiftのアクセス修飾子は3種類
public…フレームワーク外から参照可
internal…同一フレームワーク内から参照可
private…同一ファイル内から参照可
クラスにはﬁnal修飾子もある
43

44
class A: NSObject {
var str: String?
var int: Int?
private func function() {
print(self)
}
}

45
@_Tv6source1aCS_1A = global %C6source1A* null, align 8
@_swiftEmptyArrayStorage = external global %VSC23_SwiftEmptyArrayStorage, align 8
@_TWvdvC6source1A3strGSqSS_ = global i64 16, align 8
@"01L_selector_data(dealloc)" = internal constant [8 x i8] c"dealloc00", section "__TEXT,__objc_methname,cstring_literals", align 1
@"01L_selector(dealloc)" = internal global i8* getelementptr inbounds ([8 x i8]* @"01L_selector_data(dealloc)", i64 0, i64 0), section "__DATA,__objc_selrefs,literal_pointers,no_dead_strip", align 8
@_TWvdvC6source1A3intGSqSi_ = global i64 48, align 8
@"01L_selector_data(init)" = internal constant [5 x i8] c"init00", section "__TEXT,__objc_methname,cstring_literals", align 1
@"01L_selector(init)" = internal global i8* getelementptr inbounds ([5 x i8]* @"01L_selector_data(init)", i64 0, i64 0), section "__DATA,__objc_selrefs,literal_pointers,no_dead_strip", align 8
@"01L_selector_data(allocWithZone:)" = internal constant [15 x i8] c"allocWithZone:00", section "__TEXT,__objc_methname,cstring_literals", align 1
@"01L_selector(allocWithZone:)" = internal global i8* getelementptr inbounds ([15 x i8]* @"01L_selector_data(allocWithZone:)", i64 0, i64 0), section "__DATA,__objc_selrefs,literal_pointers,no_dead_strip", align 8
@_TWVBO = external global i8*
@"OBJC_METACLASS_$__TtC6source1A" = global %objc_class { %objc_class* @"OBJC_METACLASS_$_NSObject", %objc_class* @"OBJC_METACLASS_$_NSObject", %swift.opaque* @_objc_empty_cache, %swift.opaque* @_objc_empty_vtable, i64 ptrtoint ({ i32, i32,
i32, i32, i8*, i8*, i8*, i8*, i8*, i8*, i8* }* @_METACLASS_DATA__TtC6source1A to i64) }
@"OBJC_CLASS_$_NSObject" = external global %objc_class
@_objc_empty_cache = external global %swift.opaque
@_objc_empty_vtable = external global %swift.opaque
@0 = private unnamed_addr constant [4 x i8] c"str00"
@1 = private unnamed_addr constant [1 x i8] zeroinitializer
@2 = private unnamed_addr constant [22 x i8] c"T@22NSString22,N,C,Vstr00"
@"01L_selector_data(str)" = internal constant [4 x i8] c"str00", section "__TEXT,__objc_methname,cstring_literals", align 1
@3 = private unnamed_addr constant [8 x i8] c"@16@0:800"
@"01L_selector_data(setStr:)" = internal constant [8 x i8] c"setStr:00", section "__TEXT,__objc_methname,cstring_literals", align 1
@4 = private unnamed_addr constant [11 x i8] c"v24@0:8@1600"
@5 = private unnamed_addr constant [4 x i8] c"int00"
@"01L_selector_data(.cxx_destruct)" = internal constant [14 x i8] c".cxx_destruct00", section "__TEXT,__objc_methname,cstring_literals", align 1
@6 = private unnamed_addr constant [3 x i8] c"@?00"
@"OBJC_METACLASS_$_NSObject" = external global %objc_class
@_METACLASS_DATA__TtC6source1A = private constant { i32, i32, i32, i32, i8*, i8*, i8*, i8*, i8*, i8*, i8* } { i32 129, i32 40, i32 40, i32 0, i8* null, i8* getelementptr inbounds ([14 x i8]* @7, i64 0, i64 0), i8* null, i8* null, i8* null,
i8* null, i8* null }, section "__DATA, __objc_const", align 8
@_INSTANCE_METHODS__TtC6source1A = private constant { i32, i32, [4 x { i8*, i8*, i8* }] } { i32 24, i32 4, [4 x { i8*, i8*, i8* }] [{ i8*, i8*, i8* } { i8* getelementptr inbounds ([4 x i8]* @"01L_selector_data(str)", i64 0, i64 0), i8*
getelementptr inbounds ([8 x i8]* @3, i64 0, i64 0), i8* bitcast (%0* (%1*, i8*)* @_TToFC6source1Ag3strGSqSS_ to i8*) }, { i8*, i8*, i8* } { i8* getelementptr inbounds ([8 x i8]* @"01L_selector_data(setStr:)", i64 0, i64 0), i8*
getelementptr inbounds ([11 x i8]* @4, i64 0, i64 0), i8* bitcast (void (%1*, i8*, %0*)* @_TToFC6source1As3strGSqSS_ to i8*) }, { i8*, i8*, i8* } { i8* getelementptr inbounds ([5 x i8]* @"01L_selector_data(init)", i64 0, i64 0), i8*
getelementptr inbounds ([8 x i8]* @3, i64 0, i64 0), i8* bitcast (%1* (%1*, i8*)* @_TToFC6source1AcfMS0_FT_S0_ to i8*) }, { i8*, i8*, i8* } { i8* getelementptr inbounds ([14 x i8]* @"01L_selector_data(.cxx_destruct)", i64 0, i64 0), i8*
getelementptr inbounds ([3 x i8]* @6, i64 0, i64 0), i8* bitcast (void (%1*, i8*)* @_TToFC6source1AE to i8*) }] }, section "__DATA, __objc_const", align 8
@_IVARS__TtC6source1A = private constant { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] } { i32 32, i32 2, [2 x { i64*, i8*, i8*, i32, i32 }] [{ i64*, i8*, i8*, i32, i32 } { i64* @_TWvdvC6source1A3strGSqSS_, i8* getelementptr inbounds ([4 x
i8]* @0, i64 0, i64 0), i8* getelementptr inbounds ([1 x i8]* @1, i64 0, i64 0), i32 3, i32 25 }, { i64*, i8*, i8*, i32, i32 } { i64* @_TWvdvC6source1A3intGSqSi_, i8* getelementptr inbounds ([4 x i8]* @5, i64 0, i64 0), i8* getelementptr
inbounds ([1 x i8]* @1, i64 0, i64 0), i32 3, i32 9 }] }, section "__DATA, __objc_const", align 8
@_PROPERTIES__TtC6source1A = private constant { i32, i32, [1 x { i8*, i8* }] } { i32 16, i32 1, [1 x { i8*, i8* }] [{ i8*, i8* } { i8* getelementptr inbounds ([4 x i8]* @0, i64 0, i64 0), i8* getelementptr inbounds ([22 x i8]* @2, i64 0,
i64 0) }] }, section "__DATA, __objc_const", align 8
@_DATA__TtC6source1A = private constant { i32, i32, i32, i32, i8*, i8*, { i32, i32, [4 x { i8*, i8*, i8* }] }*, i8*, { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] }*, i8*, { i32, i32, [1 x { i8*, i8* }] }* } { i32 388, i32 16, i32 57, i32
0, i8* null, i8* getelementptr inbounds ([14 x i8]* @7, i64 0, i64 0), { i32, i32, [4 x { i8*, i8*, i8* }] }* @_INSTANCE_METHODS__TtC6source1A, i8* null, { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] }* @_IVARS__TtC6source1A, i8* null,
{ i32, i32, [1 x { i8*, i8* }] }* @_PROPERTIES__TtC6source1A }, section "__DATA, __objc_const", align 8
@_TMnC6source1A = constant { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 } { i64 0, i8* getelementptr inbounds ([11 x i8]* @8, i64 0, i64 0), i32 2, i32 17, i8* getelementptr inbounds ([9 x
i8]* @9, i64 0, i64 0), %swift.type** (%swift.type*)* @get_field_types_A, %swift.type_pattern* null, i32 0, i32 0, i32 0 }
@_TWoFC6source1AP33_EDAF7582627E67611B2602683AEC23D58functionfS0_FT_T_ = hidden constant i64 136, align 8
@_TMdC6source1A = global { void (%C6source1A*)*, i8**, i64, %objc_class*, %swift.opaque*, %swift.opaque*, i64, i32, i32, i32, i16, i16, i32, i32, { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32,
i32 }*, void (%Sq.16*, %C6source1A*)*, void (%Sq.16*, %C6source1A*)*, { i8*, i64 } (i8*, [24 x i8]*, %C6source1A*)*, { i64, i1 } (%C6source1A*)*, void (i64, i1, %C6source1A*)*, { i8*, i64 } (i8*, [24 x i8]*, %C6source1A*)*, void
(%C6source1A*)*, %C6source1A* (%C6source1A*)*, i64, i64 } { void (%C6source1A*)* @_TFC6source1AD, i8** @_TWVBO, i64 ptrtoint (%objc_class* @"OBJC_METACLASS_$__TtC6source1A" to i64), %objc_class* @"OBJC_CLASS_$_NSObject", %swift.opaque*
@_objc_empty_cache, %swift.opaque* @_objc_empty_vtable, i64 add (i64 ptrtoint ({ i32, i32, i32, i32, i8*, i8*, { i32, i32, [4 x { i8*, i8*, i8* }] }*, i8*, { i32, i32, [2 x { i64*, i8*, i8*, i32, i32 }] }*, i8*, { i32, i32, [1 x { i8*,
i8* }] }* }* @_DATA__TtC6source1A to i64), i64 1), i32 1, i32 0, i32 57, i16 7, i16 0, i32 168, i32 16, { i64, i8*, i32, i32, i8*, %swift.type** (%swift.type*)*, %swift.type_pattern*, i32, i32, i32 }* @_TMnC6source1A, void (%Sq.16*,
%C6source1A*)* @_TFC6source1Ag3strGSqSS_, void (%Sq.16*, %C6source1A*)* @_TFC6source1As3strGSqSS_, { i8*, i64 } (i8*, [24 x i8]*, %C6source1A*)* @_TFC6source1Am3strGSqSS_, { i64, i1 } (%C6source1A*)* @_TFC6source1Ag3intGSqSi_, void (i64,
i1, %C6source1A*)* @_TFC6source1As3intGSqSi_, { i8*, i64 } (i8*, [24 x i8]*, %C6source1A*)* @_TFC6source1Am3intGSqSi_, void (%C6source1A*)* @_TFC6source1AP33_EDAF7582627E67611B2602683AEC23D58functionfS0_FT_T_, %C6source1A* (%C6source1A*)*
@_TFC6source1AcfMS0_FT_S0_, i64 16, i64 48 }, section "__DATA,__objc_data, regular, no_dead_strip"
functionのSelectorが存在しない

46
@"01L_selector_data(dealloc)" = internal constant [8 x i8] c"dealloc00", section
"__TEXT,__objc_methname,cstring_literals", align 1
@"01L_selector(dealloc)" = internal global i8* getelementptr inbounds ([8 x i8]*
@"01L_selector_data(dealloc)", i64 0, i64 0), section
"__DATA,__objc_selrefs,literal_pointers,no_dead_strip", align 8
@_TWvdvC6source1A3intGSqSi_ = global i64 48, align 8
@"01L_selector_data(init)" = internal constant [5 x i8] c"init00", section
@"01L_selector(init)" = internal global i8* getelementptr inbounds ([5 x i8]*
@"01L_selector_data(init)", i64 0, i64 0), section
@"01L_selector_data(allocWithZone:)" = internal constant [15 x i8] c"allocWithZone:00", section
@"01L_selector(allocWithZone:)" = internal global i8* getelementptr inbounds ([15 x i8]*
@"01L_selector_data(allocWithZone:)", i64 0, i64 0), section
@_TWVBO = external global i8*
@"OBJC_METACLASS_$__TtC6source1A" = global %objc_class { %objc_class* @"OBJC_METACLASS_
$_NSObject", %objc_class* @"OBJC_METACLASS_$_NSObject", %swift.opaque* @_objc_empty_cache,
%swift.opaque* @_objc_empty_vtable, i64 ptrtoint ({ i32, i32, i32, i32, i8*, i8*, i8*, i8*, i8*,
i8*, i8* }* @_METACLASS_DATA__TtC6source1A to i64) }
@"OBJC_CLASS_$_NSObject" = external global %objc_class

47
store i8* %2, i8** getelementptr inbounds (%VSs20UnsafeMutablePointer*
@_TZvOSs7Process11_unsafeArgvGVSs20UnsafeMutablePointerGS0_VSs4Int8__, i32 0, i32 0),
align 8
%8 = call %C6source1A* bitcast (%objc_object* (%objc_object*)* @objc_retain to
%C6source1A* (%C6source1A*)*)(%C6source1A* %7) #4
call void
@_TFC6source1AP33_EDAF7582627E67611B2602683AEC23D58functionfS0_FT_T_(%C6source1A* %7)
call void bitcast (void (%objc_object*)* @objc_release to void (%C6source1A*)*)
(%C6source1A* %7) #4
ret i32 0 関数を直接実行している

48
class B: A {
override private func function() {
}
}

49
@_TZvOSs7Process11_unsafeArgvGVSs20UnsafeMutablePointerGS0_VSs4Int8__, i32 0, i32 0), align 8
%8 = call %C6source1A* bitcast (%objc_object* (%objc_object*)* @objc_retain to %C6source1A*
(%C6source1A*)*)(%C6source1A* %7) #3
%10 = load i64* %9, align 8
%12 = and i64 %10, %11
%19 = call %swift.type* @_TMaC6source1B() #2
%20 = call %C6source1B* @_TFC6source1BCfMS0_FT_S0_(%swift.type* %19)
store %C6source1B* %20, %C6source1B** @_Tv6source1bCS_1B, align 8
%21 = load %C6source1B** @_Tv6source1bCS_1B, align 8
%22 = call %C6source1B* bitcast (%objc_object* (%objc_object*)* @objc_retain to %C6source1B*
(%C6source1B*)*)(%C6source1B* %21) #3
call void @_TFC6source1BP33_EDAF7582627E67611B2602683AEC23D58functionfS0_FT_T_(%C6source1B* %21)
call void bitcast (void (%objc_object*)* @objc_release to void (%C6source1B*)*)(%C6source1B* %21) #3
ret i32 0
直接実行
vtable

private修飾子
終端のメソッドは直接呼び出し
オーバーライドされたものはvtable
selectorは存在しない (objc_msgSendできない)
ﬁnal修飾子
直接呼び出し
selectorは存在しない (objc_msgSendできない)
50
selectorは存在します

privateやﬁnalのついたメソッドを
addTarget:action:に渡すと死ぬ
隠蔽したい場合は？
モジュール切ってinternalに 
しましょう
51

Any
Swiftで定義された「なんでも代入可
能な型」
typealias protocol<>
Objective-Cのid型はAnyObjectに
相当
53

Any
Optionalの値を格納することも可能だが…
Any?型の値をAny型に格納することも可
能。
ネストしたOptionalを取り出すのは面倒。
予めAny?で宣言するが吉。
54

Any
例えばString?型の値をAny型に格納した場合、
a as? Optional<Any>では取り出せない。 
a as? Optional<String>で取り出す必要があ
る。
Any型の引数には、渡した変数が型ごと含ま
れているため。暗黙のキャストは走っていな
い。
55

Any
56
define hidden void @_TF6source8functionFP_T_(%"protocol<>"* noalias
nocapture dereferenceable(32)) #0 {
entry:
%1 = getelementptr inbounds %"protocol<>"* %0, i32 0, i32 1
%3 = bitcast %swift.type* %.metadata to i8***
%4 = getelementptr inbounds i8*** %3, i64 -1
%.metadata.valueWitnesses = load i8*** %4, align 8, !invariant.load !
29, !dereferenceable !30
%5 = load i8** %.metadata.valueWitnesses, align 8, !invariant.load !29
%destroyBuffer = bitcast i8* %5 to void ([24 x i8]*, %swift.type*)*
call void %destroyBuffer([24 x i8]* %2, %swift.type* %.metadata) #1
ret void
}

Any
57
define hidden void @_TF6source8functionFP_T_(%"protocol<>"* noalias
nocapture dereferenceable(32)) #0 {
entry:
%.metadata.valueWitnesses = load i8*** %4, align 8, !invariant.load !
29, !dereferenceable !30
%5 = load i8** %.metadata.valueWitnesses, align 8, !invariant.load !29
%destroyBuffer = bitcast i8* %5 to void ([24 x i8]*, %swift.type*)*
call void %destroyBuffer([24 x i8]* %2, %swift.type* %.metadata) #1
ret void
}
Any型

Generics
Generics引数は、型引数と曖昧な型
に分割されて渡される。
Genericsの制約が増えれば、型引数
も増える。
58

Generics
59
define hidden void @_TF6source8functionuRq_S_1P_Fq_T_(%swift.opaque*
noalias nocapture, %swift.type* %A, i8** %A.P) #0 {
entry:
%A1 = alloca %swift.type*, align 8
store %swift.type* %A, %swift.type** %A1, align 8
%1 = bitcast %swift.type* %A to i8***
%A.valueWitnesses = load i8*** %2, align 8, !invariant.load !29, !
dereferenceable !30
%3 = getelementptr inbounds i8** %A.valueWitnesses, i32 4
%4 = load i8** %3, align 8, !invariant.load !29
%destroy = bitcast i8* %4 to void (%swift.opaque*, %swift.type*)*
call void %destroy(%swift.opaque* %0, %swift.type* %A) #1
ret void
}

Generics
60
define hidden void @_TF6source8functionuRq_S_1P_Fq_T_(%swift.opaque*
noalias nocapture, %swift.type* %A, i8** %A.P) #0 {
entry:
%A1 = alloca %swift.type*, align 8
store %swift.type* %A, %swift.type** %A1, align 8
%1 = bitcast %swift.type* %A to i8***
%A.valueWitnesses = load i8*** %2, align 8, !invariant.load !29, !
dereferenceable !30
%3 = getelementptr inbounds i8** %A.valueWitnesses, i32 4
%destroy = bitcast i8* %4 to void (%swift.opaque*, %swift.type*)*
call void %destroy(%swift.opaque* %0, %swift.type* %A) #1
ret void
}
型引数

Any vs Generics
特殊な要求が無いのであれば、
Genericsを使うべき
とりあえずAnyやAnyObjectの引数
はGenericsにしてみよう
61

Protocol Extension
63
protocol P {
}
extension P {
func function() {
}
}
class A: NSObject, P {
var str: String?
var int: Int?
}

Protocol Extension
64
@_TZvOSs7Process11_unsafeArgvGVSs20UnsafeMutablePointerGS0_VSs4Int8__, i32
0, i32 0), align 8
%9 = call %C6source1A* bitcast (%objc_object* (%objc_object*)*
@objc_retain to %C6source1A* (%C6source1A*)*)(%C6source1A* %8) #3
store %C6source1A* %8, %C6source1A** %2, align 8
%10 = bitcast %C6source1A** %2 to %swift.opaque*
call void @_TFeRq_6source1P_S_S0_8functionuRq_S0__fq_FT_T_(%swift.type*
%6, i8** getelementptr inbounds ([0 x i8*]* @_TWPC6source1AS_1PS_, i32 0,
i32 0), %swift.opaque* noalias nocapture %10)
%11 = load %C6source1A** %2, align 8
call void bitcast (void (%objc_object*)* @objc_release to void
ret i32 0

Protocol Extension
65
call void
@_TFeRq_6source1P_S_S0_8functionuRq_S0__fq_FT_T_(%swift.t
ype* %6, i8** getelementptr inbounds ([0 x i8*]*
@_TWPC6source1AS_1PS_, i32 0, i32 0), %swift.opaque*
noalias nocapture %10)

が
型がProtocolだった場合、

Protocol Extension
67
store %swift.type* %6, %swift.type** getelementptr inbounds (%P6source1P_* @_Tv6source1aPS_1P_, i32 0, i32 1), align 8
store i8** getelementptr inbounds ([1 x i8*]* @_TWPC6source1AS_1PS_, i32 0, i32 0), i8*** getelementptr inbounds (%P6source1P_*
@_Tv6source1aPS_1P_, i32 0, i32 2), align 8
store %C6source1A* %7, %C6source1A** bitcast (%P6source1P_* @_Tv6source1aPS_1P_ to %C6source1A**), align 8
%_Tv6source1aPS_1P_.metadata = load %swift.type** getelementptr inbounds (%P6source1P_* @_Tv6source1aPS_1P_, i32 0, i32 1), align 8
%8 = getelementptr inbounds %P6source1P_* %2, i32 0, i32 1
store %swift.type* %_Tv6source1aPS_1P_.metadata, %swift.type** %8, align 8
%9 = load i8*** getelementptr inbounds (%P6source1P_* @_Tv6source1aPS_1P_, i32 0, i32 2), align 8
store i8** %9, i8*** %10, align 8
%12 = bitcast %swift.type* %_Tv6source1aPS_1P_.metadata to i8***
%_Tv6source1aPS_1P_.metadata.valueWitnesses = load i8*** %13, align 8, !invariant.load !29, !dereferenceable !30
%14 = getelementptr inbounds i8** %_Tv6source1aPS_1P_.metadata.valueWitnesses, i32 1
%initializeBufferWithCopyOfBuffer = bitcast i8* %15 to %swift.opaque* ([24 x i8]*, [24 x i8]*, %swift.type*)*
%16 = call %swift.opaque* %initializeBufferWithCopyOfBuffer([24 x i8]* noalias %11, [24 x i8]* getelementptr inbounds (%P6source1P_*
@_Tv6source1aPS_1P_, i32 0, i32 0), %swift.type* %_Tv6source1aPS_1P_.metadata) #3
%.metadata.valueWitnesses = load i8*** %20, align 8, !invariant.load !29, !dereferenceable !30
%21 = getelementptr inbounds i8** %.metadata.valueWitnesses, i32 2
%projectBuffer = bitcast i8* %22 to %swift.opaque* ([24 x i8]*, %swift.type*)*
%23 = call %swift.opaque* %projectBuffer([24 x i8]* %18, %swift.type* %.metadata) #3
%witness-table = load i8*** %24, align 8
store %swift.type* %.metadata, %swift.type** %.metadata1, align 8
%25 = load i8** %witness-table, align 8, !invariant.load !29
%26 = bitcast i8* %25 to void (%swift.opaque*, %swift.type*)*
call void %26(%swift.opaque* noalias nocapture %23, %swift.type* %.metadata)

Protocol Extension
68
store %swift.type* %6, %swift.type** getelementptr inbounds (%P6source1P_* @_Tv6source1aPS_1P_, i32 0, i32 1), align 8
store i8** getelementptr inbounds ([1 x i8*]* @_TWPC6source1AS_1PS_, i32 0, i32 0), i8*** getelementptr inbounds (%P6source1P_*
@_Tv6source1aPS_1P_, i32 0, i32 2), align 8
store %C6source1A* %7, %C6source1A** bitcast (%P6source1P_* @_Tv6source1aPS_1P_ to %C6source1A**), align 8
%_Tv6source1aPS_1P_.metadata = load %swift.type** getelementptr inbounds (%P6source1P_* @_Tv6source1aPS_1P_, i32 0, i32 1), align 8
store %swift.type* %_Tv6source1aPS_1P_.metadata, %swift.type** %8, align 8
%9 = load i8*** getelementptr inbounds (%P6source1P_* @_Tv6source1aPS_1P_, i32 0, i32 2), align 8
store i8** %9, i8*** %10, align 8
%12 = bitcast %swift.type* %_Tv6source1aPS_1P_.metadata to i8***
%_Tv6source1aPS_1P_.metadata.valueWitnesses = load i8*** %13, align 8, !invariant.load !29, !dereferenceable !30
%14 = getelementptr inbounds i8** %_Tv6source1aPS_1P_.metadata.valueWitnesses, i32 1
%initializeBufferWithCopyOfBuffer = bitcast i8* %15 to %swift.opaque* ([24 x i8]*, [24 x i8]*, %swift.type*)*
%16 = call %swift.opaque* %initializeBufferWithCopyOfBuffer([24 x i8]* noalias %11, [24 x i8]* getelementptr inbounds (%P6source1P_*
@_Tv6source1aPS_1P_, i32 0, i32 0), %swift.type* %_Tv6source1aPS_1P_.metadata) #3
%.metadata.valueWitnesses = load i8*** %20, align 8, !invariant.load !29, !dereferenceable !30
%21 = getelementptr inbounds i8** %.metadata.valueWitnesses, i32 2
%projectBuffer = bitcast i8* %22 to %swift.opaque* ([24 x i8]*, %swift.type*)*
%23 = call %swift.opaque* %projectBuffer([24 x i8]* %18, %swift.type* %.metadata) #3
%witness-table = load i8*** %24, align 8
store %swift.type* %.metadata, %swift.type** %.metadata1, align 8
%25 = load i8** %witness-table, align 8, !invariant.load !29
%26 = bitcast i8* %25 to void (%swift.opaque*, %swift.type*)*
call void %26(%swift.opaque* noalias nocapture %23, %swift.type* %.metadata) witness-tableを利用

optional func
70
@objc protocol Delegate: NSObjectProtocol {
optional func function()
}

71
struct/enum

optional func
できませんでした。。。
コンパイラが賢い？
同一ファイル内はチェックしてい
るっぽい
72

Closure
Swiftではメソッドへの参照を
Closureとして利用することが可能
(2.0 )
74

Closure
75
class A: NSObject {
var str: String?
var int: Int?
private func function() {
print(self)
}
}
var a = A()
var m = a.function

Closure
76
%9 = call { i8*, %swift.refcounted* }
@_TFC6source1AP33_EDAF7582627E67611B2602683AEC23D58functionFS0_FT_T_(%C6source1A* %7)
%10 = extractvalue { i8*, %swift.refcounted* } %9, 0
store i8* %10, i8** getelementptr inbounds (%swift.function* @_Tv6source1mFT_T_, i32 0, i32
0), align 8
store %swift.refcounted* %11, %swift.refcounted** getelementptr inbounds (%swift.function*
@_Tv6source1mFT_T_, i32 0, i32 1), align 8
%12 = load i8** getelementptr inbounds (%swift.function* @_Tv6source1mFT_T_, i32 0, i32 0),
align 8
%13 = load %swift.refcounted** getelementptr inbounds (%swift.function* @_Tv6source1mFT_T_,
i32 0, i32 1), align 8
%14 = bitcast i8* %12 to void (%swift.refcounted*)*
call void %14(%swift.refcounted* %13)
ret i32 0

Closure
77
%9 = call { i8*, %swift.refcounted* }
@_TFC6source1AP33_EDAF7582627E67611B2602683AEC23D58functionFS0_FT_T_(%C6source1A* %7)
store i8* %10, i8** getelementptr inbounds (%swift.function* @_Tv6source1mFT_T_, i32 0, i32
0), align 8
store %swift.refcounted* %11, %swift.refcounted** getelementptr inbounds (%swift.function*
@_Tv6source1mFT_T_, i32 0, i32 1), align 8
%12 = load i8** getelementptr inbounds (%swift.function* @_Tv6source1mFT_T_, i32 0, i32 0),
align 8
%13 = load %swift.refcounted** getelementptr inbounds (%swift.function* @_Tv6source1mFT_T_,
i32 0, i32 1), align 8
%14 = bitcast i8* %12 to void (%swift.refcounted*)*
call void %14(%swift.refcounted* %13)
ret i32 0
Closureを生成してラッピング

Swiftのこれから
Objective-Cランタイムから切り離
される可能性
objc_msgSendを使わなくても、代
替可能な環境が出来つつある
79

addTarget:action:
クロージャで代替が十分可能
メソッドをクロージャとして渡せるよ
うになった(実際はラップされている)
ReferenceCountingの問題
80

optional func
Protocol Extensionにデフォルト
実装を書くことで代替可能に見え
るが…
ちょっと挙動がバグっぽい
81

optional func
Protocol Extensionにデフォルト
実装を書くことで代替可能に見え
るが…
82

まとめ
Swift実際速い
struct/enumはメソッドが直接実行なの
で超速い
private, ﬁnal付けると直接実行になるの
で超速い
Objective-Cランタイムに依存しない方向へ
83

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