1// Copyright 2016 The Go Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style 3// license that can be found in the LICENSE file. 4 5package ssa 6 7import ( 8 "cmd/compile/internal/types" 9 "fmt" 10 "testing" 11) 12 13func BenchmarkCopyElim1(b *testing.B) { benchmarkCopyElim(b, 1) } 14func BenchmarkCopyElim10(b *testing.B) { benchmarkCopyElim(b, 10) } 15func BenchmarkCopyElim100(b *testing.B) { benchmarkCopyElim(b, 100) } 16func BenchmarkCopyElim1000(b *testing.B) { benchmarkCopyElim(b, 1000) } 17func BenchmarkCopyElim10000(b *testing.B) { benchmarkCopyElim(b, 10000) } 18func BenchmarkCopyElim100000(b *testing.B) { benchmarkCopyElim(b, 100000) } 19 20func benchmarkCopyElim(b *testing.B, n int) { 21 c := testConfig(b) 22 23 values := make([]interface{}, 0, n+2) 24 values = append(values, Valu("mem", OpInitMem, types.TypeMem, 0, nil)) 25 last := "mem" 26 for i := 0; i < n; i++ { 27 name := fmt.Sprintf("copy%d", i) 28 values = append(values, Valu(name, OpCopy, types.TypeMem, 0, nil, last)) 29 last = name 30 } 31 values = append(values, Exit(last)) 32 // Reverse values array to make it hard 33 for i := 0; i < len(values)/2; i++ { 34 values[i], values[len(values)-1-i] = values[len(values)-1-i], values[i] 35 } 36 37 for i := 0; i < b.N; i++ { 38 fun := c.Fun("entry", Bloc("entry", values...)) 39 Copyelim(fun.f) 40 } 41} 42