get the basic add example working

build/context.go

@@ -6,6 +6,7 @@ import (
 	"log"
 
 	"github.com/mmcloughlin/avo/gotypes"
+	"github.com/mmcloughlin/avo/pass"
 
 	"github.com/mmcloughlin/avo"
 	"github.com/mmcloughlin/avo/reg"
@@ -84,6 +85,11 @@ func (c *Context) Main(wout, werr io.Writer) int {
 		return 1
 	}
 
+	if err := pass.Compile.Execute(f); err != nil {
+		diag.Println(err)
+		return 1
+	}
+
 	p := avo.NewGoPrinter(wout)
 	if err := p.Print(f); err != nil {
 		diag.Println(err)

build/global.go

@@ -6,6 +6,10 @@ import (
 	"log"
 	"os"
 
+	"github.com/mmcloughlin/avo/gotypes"
+
+	"github.com/mmcloughlin/avo/reg"
+
 	"github.com/mmcloughlin/avo"
 )
 
@@ -40,3 +44,18 @@ func EOF() {
 
 	os.Exit(ctx.Main(w, os.Stderr))
 }
+
+func GP8v() reg.Virtual  { return ctx.GP8v() }
+func GP16v() reg.Virtual { return ctx.GP16v() }
+func GP32v() reg.Virtual { return ctx.GP32v() }
+func GP64v() reg.Virtual { return ctx.GP64v() }
+func Xv() reg.Virtual    { return ctx.Xv() }
+func Yv() reg.Virtual    { return ctx.Yv() }
+
+func Param(name string) gotypes.Component  { return ctx.Param(name) }
+func ParamIndex(i int) gotypes.Component   { return ctx.ParamIndex(i) }
+func Return(name string) gotypes.Component { return ctx.Return(name) }
+func ReturnIndex(i int) gotypes.Component  { return ctx.ReturnIndex(i) }
+
+func Load(src gotypes.Component, dst reg.Register) reg.Register { return ctx.Load(src, dst) }
+func Store(src reg.Register, dst gotypes.Component)             { ctx.Store(src, dst) }

examples/add/asm.go

@@ -2,12 +2,14 @@ package main
 
 import (
 	. "github.com/mmcloughlin/avo/build"
-	"github.com/mmcloughlin/avo/reg"
 )
 
 func main() {
 	TEXT("add", "func(x, y uint64) uint64")
-	ADDQ(reg.R8, reg.R11)
+	x := Load(Param("x"), GP64v())
+	y := Load(Param("y"), GP64v())
+	ADDQ(x, y)
+	Store(x, ReturnIndex(0))
 	RET()
 	EOF()
 }

pass/pass.go

@@ -2,16 +2,43 @@ package pass
 
 import "github.com/mmcloughlin/avo"
 
-// TODO(mbm): pass types
+var Compile = Concat(
+	FunctionPass(LabelTarget),
+	FunctionPass(CFG),
+	FunctionPass(Liveness),
+	FunctionPass(AllocateRegisters),
+	FunctionPass(BindRegisters),
+	FunctionPass(VerifyAllocation),
+)
 
-// FunctionPass builds a full pass that operates on all functions independently.
+type Interface interface {
-func FunctionPass(p func(*avo.Function) error) func(*avo.File) error {
+	Execute(*avo.File) error
-	return func(f *avo.File) error {
+}
+
+type Func func(*avo.File) error
+
+func (p Func) Execute(f *avo.File) error {
+	return p(f)
+}
+
+type FunctionPass func(*avo.Function) error
+
+func (p FunctionPass) Execute(f *avo.File) error {
 	for _, fn := range f.Functions {
 		if err := p(fn); err != nil {
 			return err
 		}
 	}
 	return nil
-	}
+}
+
+func Concat(passes ...Interface) Interface {
+	return Func(func(f *avo.File) error {
+		for _, p := range passes {
+			if err := p.Execute(f); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
 }