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In regular swift this is a nice optimization. In embedded swift it's a requirement, because the compiler needs to be able to specialize generic deinits of non-copyable types. The new de-virtualization utilities are called from two places: * from the new DeinitDevirtualizer pass. It replaces the old MoveOnlyDeinitDevirtualization, which is very basic and does not fulfill the needs for embedded swift. * from MandatoryPerformanceOptimizations for embedded swift
31 lines
1013 B
Swift
31 lines
1013 B
Swift
//===--- DeinitDevirtualizer.swift ----------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2023 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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import SIL
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/// Devirtualizes destroys of non-copyable values.
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///
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let deinitDevirtualizer = FunctionPass(name: "deinit-devirtualizer") {
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(function: Function, context: FunctionPassContext) in
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for inst in function.instructions {
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switch inst {
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case let destroyValue as DestroyValueInst:
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_ = devirtualizeDeinits(of: destroyValue, context)
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case let destroyAddr as DestroyAddrInst:
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_ = devirtualizeDeinits(of: destroyAddr, context)
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default:
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break
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}
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}
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}
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