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Erik Eckstein
2d2b457be4
The `move_value` instruction is only used to specify flags. Remove a `move_value` which either doesn't specify any flags or which flags are not relevant outside the mandatory pipeline, like `[lexical]`.
39 lines
1.1 KiB
Swift
39 lines
1.1 KiB
Swift
//===--- SimplifyMoveValue.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 - 2025 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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/// The `move_value` instruction is only used to specify flags.
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/// Remove a `move_value` which either doesn't specify any flags or which flags are not relevant
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/// outside the mandatory pipeline, like `[lexical]`.
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///
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/// Replaces
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///
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/// ```
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/// %1 = move_value %0
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/// use %1
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/// ```
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/// ->
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/// ```
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/// use %0
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/// ```
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///
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extension MoveValueInst : Simplifiable, SILCombineSimplifiable {
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func simplify(_ context: SimplifyContext) {
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if hasPointerEscape {
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// Keep this flag.
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return
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}
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replace(with: fromValue, context)
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}
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}
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