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b642d771be
Enable KeyPath/AnyKeyPath/PartialKeyPath/WritableKeyPath in Embedded Swift, but for compile-time use only: - Add keypath optimizations into the mandatory optimizations pipeline - Allow keypath optimizations to look through begin_borrow, to make them work even in OSSA. - If a use of a KeyPath doesn't optimize away, diagnose in PerformanceDiagnostics - Make UnsafePointer.pointer(to:) transparent to allow the keypath optimization to happen in the callers of UnsafePointer.pointer(to:).
36 lines
1.1 KiB
Swift
36 lines
1.1 KiB
Swift
//===--- SimplifyKeyPath.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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extension KeyPathInst : OnoneSimplifyable {
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func simplify(_ context: SimplifyContext) {
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if allUsesRemovable(instruction: self) {
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context.erase(instructionIncludingAllUsers: self)
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}
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}
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}
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fileprivate func allUsesRemovable(instruction: Instruction) -> Bool {
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for result in instruction.results {
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for use in result.uses {
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if !(use.instruction is UpcastInst || use.instruction is DestroyValueInst || use.instruction is BeginBorrowInst || use.instruction is EndBorrowInst) {
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return false
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}
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if !allUsesRemovable(instruction: use.instruction) {
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return false
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}
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}
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}
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return true
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}
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