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package pass
import (
"testing"
"github.com/mmcloughlin/avo/reg"
)
func TestAllocatorSimple(t *testing.T) {
c := reg.NewCollection()
x, y := c.XMM(), c.YMM()
a, err := NewAllocatorForKind(reg.KindVector)
if err != nil {
t.Fatal(err)
}
a.Add(x.ID())
a.Add(y.ID())
a.AddInterference(x.ID(), y.ID())
alloc, err := a.Allocate()
if err != nil {
t.Fatal(err)
}
t.Log(alloc)
if alloc.LookupRegister(x) != reg.X0 || alloc.LookupRegister(y) != reg.Y1 {
t.Fatalf("unexpected allocation")
}
}
func TestAllocatorImpossible(t *testing.T) {
a, err := NewAllocatorForKind(reg.KindVector)
if err != nil {
t.Fatal(err)
}
a.AddInterference(reg.X7.ID(), reg.Z7.ID())
_, err = a.Allocate()
if err == nil {
t.Fatal("expected allocation error")
}
}
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