go copyelim_test 源码
golang copyelim_test 代码
文件路径：/src/cmd/compile/internal/ssa/copyelim_test.go
// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package ssa
import (
"cmd/compile/internal/types"
"fmt"
"testing"
)
func BenchmarkCopyElim1(b *testing.B) { benchmarkCopyElim(b, 1) }
func BenchmarkCopyElim10(b *testing.B) { benchmarkCopyElim(b, 10) }
func BenchmarkCopyElim100(b *testing.B) { benchmarkCopyElim(b, 100) }
func BenchmarkCopyElim1000(b *testing.B) { benchmarkCopyElim(b, 1000) }
func BenchmarkCopyElim10000(b *testing.B) { benchmarkCopyElim(b, 10000) }
func BenchmarkCopyElim100000(b *testing.B) { benchmarkCopyElim(b, 100000) }
func benchmarkCopyElim(b *testing.B, n int) {
c := testConfig(b)
values := make([]interface{}, 0, n+2)
values = append(values, Valu("mem", OpInitMem, types.TypeMem, 0, nil))
last := "mem"
for i := 0; i < n; i++ {
name := fmt.Sprintf("copy%d", i)
values = append(values, Valu(name, OpCopy, types.TypeMem, 0, nil, last))
last = name
}
values = append(values, Exit(last))
// Reverse values array to make it hard
for i := 0; i < len(values)/2; i++ {
values[i], values[len(values)-1-i] = values[len(values)-1-i], values[i]
}
for i := 0; i < b.N; i++ {
fun := c.Fun("entry", Bloc("entry", values...))
Copyelim(fun.f)
}
}
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