app 添加 wasm 子命令用于 WebAssembly 后端测试

internal/app/app.wa.go

@@ -21,6 +21,7 @@ import (
 	"github.com/wa-lang/wa/internal/backends/compiler_c"
 	"github.com/wa-lang/wa/internal/backends/compiler_ll"
 	"github.com/wa-lang/wa/internal/backends/compiler_ll/builtin"
+	"github.com/wa-lang/wa/internal/backends/compiler_wasm"
 	"github.com/wa-lang/wa/internal/config"
 	"github.com/wa-lang/wa/internal/format"
 	"github.com/wa-lang/wa/internal/loader"
@@ -310,6 +311,22 @@ func (p *App) ASM(filename string) error {
 	return nil
 }
 
+func (p *App) WASM(filename string) error {
+	cfg := config.DefaultConfig()
+	prog, err := loader.LoadProgram(cfg, filename)
+	if err != nil {
+		return err
+	}
+
+	output, err := compiler_wasm.New().Compile(prog)
+	if err != nil {
+		return err
+	}
+
+	fmt.Print(output)
+	return nil
+}
+
 func (p *App) Build(filename string, src interface{}, outfile string) (output []byte, err error) {
 	return p.build(filename, src, outfile, p.opt.TargetOS, p.opt.TargetArch)
 }

internal/backends/compiler_wasm/compile_wasm_.go

@@ -168,7 +168,7 @@ func (p *Compiler) emitGlobals() error {
 	if len(p.module.Global.Globals) > 0 {
 		return nil
 	}
-	panic("TODO")
+	panic("TODO: support WASM")
 }
 
 func (p *Compiler) emitMainBody() error {
@@ -206,7 +206,7 @@ func (p *Compiler) compileNone(ctx *module.Expr, node ast.Node) error {
 		return nil
 	}
 
-	panic("TODO")
+	panic("TODO: support WASM")
 }
 
 func (p *Compiler) globalIndexByName(name string) uint32 {

main.go

@@ -250,6 +250,24 @@ func main() {
 				return nil
 			},
 		},
+		{
+			Name:  "wasm",
+			Usage: "parse Wa and print ouput WebAssembly code",
+			Action: func(c *cli.Context) error {
+				if c.NArg() == 0 {
+					fmt.Fprintf(os.Stderr, "no input file")
+					os.Exit(1)
+				}
+
+				ctx := app.NewApp(build_Options(c))
+				err := ctx.WASM(c.Args().First())
+				if err != nil {
+					fmt.Println(err)
+					os.Exit(1)
+				}
+				return nil
+			},
+		},
 		{
 			Name:  "test",
 			Usage: "test packages",