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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 "testing"
func TestSchedule(t *testing.T) {
c := testConfig(t)
cases := []fun{
Fun(c, "entry",
Bloc("entry",
Valu("mem0", OpInitMem, TypeMem, 0, nil),
Valu("ptr", OpConst64, TypeInt64, 0xABCD, nil),
Valu("v", OpConst64, TypeInt64, 12, nil),
Valu("mem1", OpStore, TypeMem, 8, nil, "ptr", "v", "mem0"),
Valu("mem2", OpStore, TypeMem, 8, nil, "ptr", "v", "mem1"),
Valu("mem3", OpStore, TypeInt64, 8, nil, "ptr", "sum", "mem2"),
Valu("l1", OpLoad, TypeInt64, 0, nil, "ptr", "mem1"),
Valu("l2", OpLoad, TypeInt64, 0, nil, "ptr", "mem2"),
Valu("sum", OpAdd64, TypeInt64, 0, nil, "l1", "l2"),
Goto("exit")),
Bloc("exit",
Exit("mem3"))),
}
for _, c := range cases {
schedule(c.f)
if !isSingleLiveMem(c.f) {
t.Error("single-live-mem restriction not enforced by schedule for func:")
printFunc(c.f)
}
}
}
func isSingleLiveMem(f *Func) bool {
for _, b := range f.Blocks {
var liveMem *Value
for _, v := range b.Values {
for _, w := range v.Args {
if w.Type.IsMemory() {
if liveMem == nil {
liveMem = w
continue
}
if w != liveMem {
return false
}
}
}
if v.Type.IsMemory() {
liveMem = v
}
}
}
return true
}
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