pass: test for liveness

reg/collection.go

@@ -0,0 +1,33 @@
+package reg
+
+type Collection struct {
+	vid map[Kind]VID
+}
+
+func NewCollection() *Collection {
+	return &Collection{
+		vid: map[Kind]VID{},
+	}
+}
+
+func (c *Collection) VirtualRegister(k Kind, s Size) Virtual {
+	vid := c.vid[k]
+	c.vid[k]++
+	return NewVirtual(vid, k, s)
+}
+
+func (c *Collection) GP8v() Virtual { return c.GPv(B8) }
+
+func (c *Collection) GP16v() Virtual { return c.GPv(B16) }
+
+func (c *Collection) GP32v() Virtual { return c.GPv(B32) }
+
+func (c *Collection) GP64v() Virtual { return c.GPv(B64) }
+
+func (c *Collection) GPv(s Size) Virtual { return c.VirtualRegister(GP, s) }
+
+func (c *Collection) Xv() Virtual { return c.VirtualRegister(SSEAVX, B128) }
+
+func (c *Collection) Yv() Virtual { return c.VirtualRegister(SSEAVX, B256) }
+
+func (c *Collection) Zv() Virtual { return c.VirtualRegister(SSEAVX, B512) }

reg/types.go

@@ -38,11 +38,7 @@ func (f *Family) define(s Spec, id PID, name string) Physical {
 }
 
 func (f *Family) Virtual(id VID, s Size) Virtual {
-	return virtual{
-		id:   id,
-		kind: f.Kind,
-		Size: s,
-	}
+	return NewVirtual(id, f.Kind, s)
 }
 
 type private interface {
@@ -74,6 +70,14 @@ type virtual struct {
 	Size
 }
 
+func NewVirtual(id VID, k Kind, s Size) Virtual {
+	return virtual{
+		id:   id,
+		kind: k,
+		Size: s,
+	}
+}
+
 func (v virtual) VirtualID() VID { return v.id }
 func (v virtual) Kind() Kind     { return v.kind }