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//===--- SimplifyCondBranch.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 CondBranchInst : OnoneSimplifiable {
func simplify(_ context: SimplifyContext) {
tryConstantFold(context)
}
}
private extension CondBranchInst {
func tryConstantFold(_ context: SimplifyContext) {
guard let literal = condition as? IntegerLiteralInst,
let conditionValue = literal.value else
{
return
}
let builder = Builder(before: self, context)
if conditionValue == 0 {
builder.createBranch(to: falseBlock, arguments: Array(falseOperands.map { $0.value }))
} else {
builder.createBranch(to: trueBlock, arguments: Array(trueOperands.map { $0.value }))
}
context.erase(instruction: self)
}
}
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