github.com/go-asm/go@v1.21.1-0.20240213172139-40c5ead50c48/cmd/compile/ssa/copyelim_test.go (about)

     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  
     5  package ssa
     6  
     7  import (
     8  	"fmt"
     9  	"testing"
    10  
    11  	"github.com/go-asm/go/cmd/compile/types"
    12  )
    13  
    14  func BenchmarkCopyElim1(b *testing.B)      { benchmarkCopyElim(b, 1) }
    15  func BenchmarkCopyElim10(b *testing.B)     { benchmarkCopyElim(b, 10) }
    16  func BenchmarkCopyElim100(b *testing.B)    { benchmarkCopyElim(b, 100) }
    17  func BenchmarkCopyElim1000(b *testing.B)   { benchmarkCopyElim(b, 1000) }
    18  func BenchmarkCopyElim10000(b *testing.B)  { benchmarkCopyElim(b, 10000) }
    19  func BenchmarkCopyElim100000(b *testing.B) { benchmarkCopyElim(b, 100000) }
    20  
    21  func benchmarkCopyElim(b *testing.B, n int) {
    22  	c := testConfig(b)
    23  
    24  	values := make([]interface{}, 0, n+2)
    25  	values = append(values, Valu("mem", OpInitMem, types.TypeMem, 0, nil))
    26  	last := "mem"
    27  	for i := 0; i < n; i++ {
    28  		name := fmt.Sprintf("copy%d", i)
    29  		values = append(values, Valu(name, OpCopy, types.TypeMem, 0, nil, last))
    30  		last = name
    31  	}
    32  	values = append(values, Exit(last))
    33  	// Reverse values array to make it hard
    34  	for i := 0; i < len(values)/2; i++ {
    35  		values[i], values[len(values)-1-i] = values[len(values)-1-i], values[i]
    36  	}
    37  
    38  	for i := 0; i < b.N; i++ {
    39  		fun := c.Fun("entry", Bloc("entry", values...))
    40  		Copyelim(fun.f)
    41  	}
    42  }