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// Copyright 2015 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"
)
const (
blockCount = 1000
passCount = 15000
)
type passFunc func(*Func)
func BenchmarkDSEPass(b *testing.B) { benchFnPass(b, dse, blockCount, genFunction) }
func BenchmarkDSEPassBlock(b *testing.B) { benchFnBlock(b, dse, genFunction) }
func BenchmarkCSEPass(b *testing.B) { benchFnPass(b, cse, blockCount, genFunction) }
func BenchmarkCSEPassBlock(b *testing.B) { benchFnBlock(b, cse, genFunction) }
func BenchmarkDeadcodePass(b *testing.B) { benchFnPass(b, deadcode, blockCount, genFunction) }
func BenchmarkDeadcodePassBlock(b *testing.B) { benchFnBlock(b, deadcode, genFunction) }
func multi(f *Func) {
cse(f)
dse(f)
deadcode(f)
}
func BenchmarkMultiPass(b *testing.B) { benchFnPass(b, multi, blockCount, genFunction) }
func BenchmarkMultiPassBlock(b *testing.B) { benchFnBlock(b, multi, genFunction) }
// benchFnPass runs passFunc b.N times across a single function.
func benchFnPass(b *testing.B, fn passFunc, size int, bg blockGen) {
b.ReportAllocs()
c := testConfig(b)
fun := c.Fun("entry", bg(size)...)
CheckFunc(fun.f)
b.ResetTimer()
for i := 0; i < b.N; i++ {
fn(fun.f)
b.StopTimer()
CheckFunc(fun.f)
b.StartTimer()
}
}
// benchFnPass runs passFunc across a function with b.N blocks.
func benchFnBlock(b *testing.B, fn passFunc, bg blockGen) {
b.ReportAllocs()
c := testConfig(b)
fun := c.Fun("entry", bg(b.N)...)
CheckFunc(fun.f)
b.ResetTimer()
for i := 0; i < passCount; i++ {
fn(fun.f)
}
b.StopTimer()
}
func genFunction(size int) []bloc {
var blocs []bloc
elemType := types.Types[types.TINT64]
ptrType := elemType.PtrTo()
valn := func(s string, m, n int) string { return fmt.Sprintf("%s%d-%d", s, m, n) }
blocs = append(blocs,
Bloc("entry",
Valu(valn("store", 0, 4), OpInitMem, types.TypeMem, 0, nil),
Valu("sb", OpSB, types.Types[types.TUINTPTR], 0, nil),
Goto(blockn(1)),
),
)
for i := 1; i < size+1; i++ {
blocs = append(blocs, Bloc(blockn(i),
Valu(valn("v", i, 0), OpConstBool, types.Types[types.TBOOL], 1, nil),
Valu(valn("addr", i, 1), OpAddr, ptrType, 0, nil, "sb"),
Valu(valn("addr", i, 2), OpAddr, ptrType, 0, nil, "sb"),
Valu(valn("addr", i, 3), OpAddr, ptrType, 0, nil, "sb"),
Valu(valn("zero", i, 1), OpZero, types.TypeMem, 8, elemType, valn("addr", i, 3),
valn("store", i-1, 4)),
Valu(valn("store", i, 1), OpStore, types.TypeMem, 0, elemType, valn("addr", i, 1),
valn("v", i, 0), valn("zero", i, 1)),
Valu(valn("store", i, 2), OpStore, types.TypeMem, 0, elemType, valn("addr", i, 2),
valn("v", i, 0), valn("store", i, 1)),
Valu(valn("store", i, 3), OpStore, types.TypeMem, 0, elemType, valn("addr", i, 1),
valn("v", i, 0), valn("store", i, 2)),
Valu(valn("store", i, 4), OpStore, types.TypeMem, 0, elemType, valn("addr", i, 3),
valn("v", i, 0), valn("store", i, 3)),
Goto(blockn(i+1))))
}
blocs = append(blocs,
Bloc(blockn(size+1), Goto("exit")),
Bloc("exit", Exit("store0-4")),
)
return blocs
}