SwiftコンパイラがSwiftで開発できるようになる話

by freddi(Yuki Aki)

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2021/07/21 SwiftѪ޷ձ SwiftίϯύΠϥ͕SwiftͰ։ൃͰ͖ΔΑ͏ʹͳΔ࿩ freddi (@_ _ _ freddi _ _ _)

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͓·͑ͩΕ • freddi • iOS Engineer at Fukuoka • LINEελϯϓൢചத • ΦϦδφϧTγϟπ΋

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͓·͑ͩΕ • Geekle ͱ͍͏ஂମ͕ओ࠵ͯ͠Δ iOS Conference ʹొஃ͠·͢ʂ • https://geekle.us/ios

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SwiftίϯύΠϥ͕SwiftͰ։ൃͰ͖ΔΑ͏ʹͳΔ

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ͨͩ͠Ұ෦ͷ࿩

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SwiftίϯύΠϥͷ։ൃݴޠ • ϨϙδτϦͷ൒෼͸C++ • ඪ४ϥΠϒϥϦΛআ͍ͯ΄΅ C++ • Driver, Parser, Type Checker, Optimizer ͳͲ • ࣮૷ΛಡΉʹ΋C++΍LLVMͷࣄલ஌͕͍͔ࣝͭ͘ඞཁ

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Swift Driver ʹ͍ͭͯ

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Swift Driver ʹ͍ͭͯ • ࣮͸ͪΒͬͱࠓ೥ͷWWDCͰݴٴ͞Ε͍ͯΔ • ΠϯΫϦϝϯλϧϏϧυΛߴ଎Խ͢ΔͨΊͷ3ͭͷओཁͳվળͷҰͭ https://developer.apple.com/videos/play/wwdc2021/10192/

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͜͜ͰͷDriverͱ͸Կ • USBͱ͔ͷυϥΠόͱ͸શ͘ผ෺ͳͷͰ஫ҙ͞Εͨ͠ • DriverϓϩάϥϜͱ͸ɺ • ͍͔ͭ͘ͷύʔπͱͯ͠ͷϓϩάϥϜΛద੾ʹݺͼग़͢ϓϩάϥϜ • gcc ίϚϯυ͸υϥΠόϓϩάϥϜ • ࣮͸ swift ΍ swiftc ίϚϯυ΋υϥΠόϓϩάϥϜ

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swift ͷ৔߹ swift   (driver) package hello.swift (Կ΋ͳ͠) REPLͷىಈ helllo.swift ͷίϯύΠϧɾϏϧυ   ࣮ߦϑΝΠϧੜ੒ Swift package ؔ࿈ͷಈ࡞ swift   (driver) swift   (driver) … υϥΠό …υϥΠό΁ͷ໋ྩ … ݁Ռ

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ίϚϯυϥΠϯͷҾ਺ͱͷؔ܎ swift   (driver) package hello.swift (Կ΋ͳ͠) REPLͷىಈ helllo.swift ͷίϯύΠϧɾϏϧυ   ࣮ߦϑΝΠϧੜ੒ Swift package ؔ࿈ͷಈ࡞ swift   (driver) swift   (driver) $ swift package $ swift hello.world $ swift … ϝΠϯͷίϚϯυ … Ҿ਺ͳͲ … ݁Ռ … ίϚϯυϥΠϯ্Ͱͷॻ͖ํ

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SwiftͷDriver • swift ίϚϯυ͕ Driver ͕ͩɺ࣮ଶ͸ swift-driver ίϚϯυ • swift-driver ࣗ਎͕Ͳ͏͍͏໊લͰݺ͹Ε͔ͨɺٴͼҾ਺ʹΑͬͯ  ৼΔ෣͍΍ɺݺͼग़͢SwiftίϯύΠϥͷϞδϡʔϧΛม͑Δ • ͳͷͰίϚϯυࣗ਎͕ swift swiftc ͱݺ͹ΕΔ͔ʹΑͬͯ෼ذ͕͋Δ • swift swiftc ͸࣮͸΄΅ swift-driver ͱಉ͡ίϚϯυ • ҎલͷDriver͸C++࣮૷͕ͩɺSwift Driver ͸ Swift Ͱॻ͔Ε͍ͯΔ

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͜Ε͔Βͷ Swift Driver ʹ͍ͭͯ • Swift 5.5 (Xcode 13 Beta) Ҏ߱Ͱඪ४Ͱར༻͞ΕΔ

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͜Ε͔Βͷ Swift Driver ʹ͍ͭͯ • Swift Driver ͷ࿩ͷϝϦοτ͸͋·Γ·ͱ·ͬͯͳ͍ • ͳΜ͔ Twitter ʹస͕͍ͬͯΔ͘Β͍ • https://twitter.com/dgregor79/status/1260798039515488257 ͜͜ • ࠓ๺࢈ۀ • SwiftPM ޲͚ͳͲͷΠϯΫϦϝϯλϧϏϧυͷվળ • ΞʔΩςΫνϟ͕վળ͞Εͯɺར఺͕૿͑ΔʢฒྻԽͳͲʣ • ৺ஔ͖ͳ͘޷͖ͳݴޠʢSwiftʣͰॻ͚Δ

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Swift Driver ʹؔ͢Δৄ͍͠ࢿྉ • ೔ຊޠͷࢿྉ • https://speakerdeck.com/freddi/jin-ri-karashi-meruswift-driver • https://qiita.com/freddi_/items/4c2149055959248dda28 • ݱঢ়ݸਓͰॻ͍ͯΔࢿྉ͸ੈքͰ๻ͷ͘Β͍͔͠ͳ͍ • ϓϩδΣΫτࣗମ͸OSSͳͷͰͦͪΒ΋ࢀর͞Εͨ͠ • https://github.com/apple/swift-driver

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࠷దԽʹ͍ͭͯ

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SwiftίϯύΠϥͷ࠷దԽ෦෼ • ࠷దԽ෦෼ͷ࣮૷͸͢΂ͯC++ͩͬͨ • ͔͠͠ɺlibswift ͱ͍͏΋ͷʹΑͬͯ Swift Ͱ΋ॻ͚ΔΑ͏ʹͳͬͨ • ଟ෼ஈ֊తʹҠߦ͢Δʁ • https://github.com/apple/swift/blob/main/libswift/README.md

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SwiftίϯύΠϥͷ࠷దԽ෦෼ raw SIL canonical SIL Pass Pass Pass Pass • Swift ίʔυ͸ίϯύΠϥ಺Ͱ SIL ͱݺ͹ΕΔίʔυʹม׵͞ΕΔ • SIL ͸࠷దԽ͞ΕΔ͕ɺ࠷దԽલ͕ raw SILɺޙ͕ canonical SIL • raw SIL ΛͦΕͧΕͷ໾ׂͰ࠷దԽ͢ΔϞδϡʔϧ͕ Pass • Pass ͕ Swift Ͱॻ͚ΔΑ͏ʹͳͬͨɺͱ͍͏࿩ (libswift)

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SwiftίϯύΠϥͷ࠷దԽ෦෼ • NSSpain 2020 Ͱ ͜͜Β΁Μͷৄ͍͠࿩͕͋ΔͷͰؾʹͳΔํ͸  ࢀর͞Εͨ͠ https://vimeo.com/479467405

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C++ ͔Β Swift ʹ͢Δࡍͷݒ೦ • SwiftͷϝϞϦ؅ཧํ๏͸ ARCɺҰํC++͸΄΅ϓϩάϥϚ͕΍Δ • ARC ͸ศར͚ͩͲΦʔόʔϔου͕͋Δ • ARCͷΧ΢ϯτ෼ɺཪͰίʔυ͕૿͑ͨΓ͍ͯ͠Δͷ͸ࣄ࣮ • libswift Ͱ͸ͦΕΛճආ͢ΔͨΊͷ޻෉͕͋Δ Θ͍Θ͍swiftc #29 Ͱ͜͜Β΁Μͷ࿩͕͋Γ·͢ʂ https://iosdiscord.connpass.com/event/218858/

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Swift Ͱॻ͘ํ๏ • libswift ͸ Swift Package Manager ܦ༝ͰimportՄೳʂ • ͔ΜͨΜʹ Optimizer ͷ Pass Λ։ൃͰ͖·͢ Θ͍Θ͍swiftc #29 Ͱ͜͜Β΁Μͷ࿩͕͋Γ·͢ʂ https://iosdiscord.connpass.com/event/218858/

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·ͱΊ

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SwiftίϯύΠϥͷҰ෦͕SwiftͰ։ൃͰ͖Δ • Swift Driver Project • https://github.com/apple/swift-driver • https://twitter.com/dgregor79/status/1260798039515488257 • Swift ͷ࠷దԽ෦෼ • https://github.com/apple/swift/blob/main/libswift/README.md • Θ͍Θ͍swiftc #29 Ͱղઆ͞ΕΔͷͰདྷͯͶʂ  https://iosdiscord.connpass.com/event/218858/