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c001de0359
These have all shown to be interesting, relevant, stable, and optimized well enough by the compiler to be useful for cpu performance tracking.
65 lines
1.3 KiB
Swift
65 lines
1.3 KiB
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 - 2017 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 TestsUtils
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public let StackPromo = BenchmarkInfo(
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name: "StackPromo",
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runFunction: run_StackPromo,
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tags: [.regression, .cpubench],
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legacyFactor: 100)
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protocol Proto {
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func at() -> Int
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}
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@inline(never)
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func testStackAllocation(_ p: Proto) -> Int {
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var a = [p, p, p]
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var b = 0
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a.withUnsafeMutableBufferPointer {
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let array = $0
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for i in 0..<array.count {
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b += array[i].at()
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}
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}
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return b
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}
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class Foo : Proto {
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init() {}
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func at() -> Int{
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return 1
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}
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}
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@inline(never)
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func work(_ f: Foo) -> Int {
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var r = 0
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for _ in 0..<1_000 {
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r += testStackAllocation(f)
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}
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return r
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}
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public func run_StackPromo(_ N: Int) {
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let foo = Foo()
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var r = 0
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for i in 0..<N {
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if i % 2 == 0 {
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r += work(foo)
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} else {
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r -= work(foo)
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}
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}
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blackHole(r)
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}
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