Turn off the GenericSignatureBuilder #42113
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The Requirement Machine has been enabled in 'verify' mode for a while, where we run both the GenericSignatureBuilder and Requirement Machine minimization algorithm and compare the results, with the GenericSignatureBuilder being used to emit diagnostics. Now, it's time to flip the flags to 'enabled' mode, where the GenericSignatureBuilder doesn't run at all, and the Requirement Machine emits diagnostics. This finally allows us to realize the correctness and performance gains from using the Requirement Machine. See https://forums.swift.org/t/the-requirement-machine-a-new-generics-implementation-based-on-term-rewriting/55601/9 for details. Correctness: - https://bugs.swift.org/browse/SR-7353 - https://bugs.swift.org/browse/SR-9595 - https://bugs.swift.org/browse/SR-10532 - https://bugs.swift.org/browse/SR-10752 - https://bugs.swift.org/browse/SR-11100 - https://bugs.swift.org/browse/SR-11532 - https://bugs.swift.org/browse/SR-11997 - https://bugs.swift.org/browse/SR-12120 - https://bugs.swift.org/browse/SR-12736 - https://bugs.swift.org/browse/SR-12980 - https://bugs.swift.org/browse/SR-13018 - https://bugs.swift.org/browse/SR-13491 - https://bugs.swift.org/browse/SR-13502 - https://bugs.swift.org/browse/SR-14484 - https://bugs.swift.org/browse/SR-14485 - https://bugs.swift.org/browse/SR-14659 - https://bugs.swift.org/browse/SR-14776 - https://bugs.swift.org/browse/SR-14917 - https://bugs.swift.org/browse/SR-15009 - https://bugs.swift.org/browse/SR-15790 - https://bugs.swift.org/browse/SR-15920 - rdar://25065503 - rdar://39225307 - rdar://44590919 - rdar://45957015 - rdar://50169558 - rdar://51068593 - rdar://52921168 - rdar://54394068 - rdar://55758433 - rdar://58455439 - rdar://59132837 - rdar://62894047 - rdar://64953119 - rdar://65015626 - rdar://65558829 - rdar://68084643 - rdar://68376692 - rdar://75329340 - rdar://76646764 - rdar://77683844 - rdar://77794156 - rdar://78233378 - rdar://78481510 - rdar://78643612 - rdar://80820294 - rdar://81276358 - rdar://81425392 - rdar://83308672 - rdar://83373331 - rdar://83848546 - rdar://83955123 - rdar://88514540 - rdar://89641532 - rdar://90264856 - rdar://90343419 Performance: - rdar://33654588 - rdar://47821930 - rdar://51908331 - rdar://59037195 - rdar://65131776 - rdar://73771235 - rdar://75188696 GSB crashes with no reduced test case that are likely fixed: - https://bugs.swift.org/browse/SR-4872 - rdar://32144681 - rdar://42376632 - rdar://46270030 - rdar://47199993 - rdar://48648900 - rdar://49535930 - rdar://49712445 - rdar://49712637 - rdar://49713096 - rdar://49713107 - rdar://60334839 - rdar://66593156 - rdar://68982368 - rdar://76706682 - rdar://77794745 - rdar://84724541
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@swift-ci Please smoke test |
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@swift-ci Please test source compatibility |
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I love that the source compat suite failed with an unexpected pass for SR-13190, which also seems fixed by this |
This was referenced Apr 2, 2022
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The Requirement Machine has been running in 'verify' mode for a while, where we run both the GenericSignatureBuilder and Requirement Machine minimization algorithm and compare the results, with the GenericSignatureBuilder being used to emit diagnostics.
Now, it's time to flip the flags to 'enabled' mode, where the GenericSignatureBuilder doesn't run at all, and the Requirement Machine emits diagnostics. This finally allows us to realize the correctness and performance gains from using the Requirement Machine.
See https://forums.swift.org/t/the-requirement-machine-a-new-generics-implementation-based-on-term-rewriting/55601/ for details.
Resolves rdar://88134788.
Correctness:
Performance:
GSB crashes with no reduced test case that are likely fixed: