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//===--- SimplifyKeyPath.swift --------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2023 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import SIL
extension KeyPathInst : OnoneSimplifyable {
func simplify(_ context: SimplifyContext) {
if allUsesRemovable(instruction: self) {
if parentFunction.hasOwnership {
let builder = Builder(after: self, context)
for operand in self.operands {
if !operand.value.type.isTrivial(in: parentFunction) {
builder.createDestroyValue(operand: operand.value)
}
}
}
context.erase(instructionIncludingAllUsers: self)
}
}
}
fileprivate func allUsesRemovable(instruction: Instruction) -> Bool {
for result in instruction.results {
for use in result.uses {
switch use.instruction {
case is UpcastInst,
is DestroyValueInst,
is BeginBorrowInst,
is EndBorrowInst,
is MoveValueInst,
is CopyValueInst:
// This is a removable instruction type, continue descending into uses
if !allUsesRemovable(instruction: use.instruction) {
return false
}
default:
return false
}
}
}
return true
}
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