core/vm, tests: implemented semi-jit vm

* changed stack and removed stack ptr. Let go decide on slice reuse.

cmd/evm/main.go

@@ -32,6 +32,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/ethdb"
+	"github.com/ethereum/go-ethereum/logger/glog"
 )
 
 var (
@@ -40,6 +41,14 @@ var (
 		Name:  "debug",
 		Usage: "output full trace logs",
 	}
+	ForceJitFlag = cli.BoolFlag{
+		Name:  "forcejit",
+		Usage: "forces jit compilation",
+	}
+	DisableJitFlag = cli.BoolFlag{
+		Name:  "nojit",
+		Usage: "disabled jit compilation",
+	}
 	CodeFlag = cli.StringFlag{
 		Name:  "code",
 		Usage: "EVM code",
@@ -77,6 +86,8 @@ func init() {
 	app = utils.NewApp("0.2", "the evm command line interface")
 	app.Flags = []cli.Flag{
 		DebugFlag,
+		ForceJitFlag,
+		DisableJitFlag,
 		SysStatFlag,
 		CodeFlag,
 		GasFlag,
@@ -90,6 +101,10 @@ func init() {
 
 func run(ctx *cli.Context) {
 	vm.Debug = ctx.GlobalBool(DebugFlag.Name)
+	vm.ForceJit = ctx.GlobalBool(ForceJitFlag.Name)
+	vm.DisableJit = ctx.GlobalBool(DisableJitFlag.Name)
+
+	glog.SetToStderr(true)
 
 	db, _ := ethdb.NewMemDatabase()
 	statedb := state.New(common.Hash{}, db)
@@ -110,11 +125,6 @@ func run(ctx *cli.Context) {
 	)
 	vmdone := time.Since(tstart)
 
-	if e != nil {
-		fmt.Println(e)
-		os.Exit(1)
-	}
-
 	if ctx.GlobalBool(DumpFlag.Name) {
 		fmt.Println(string(statedb.Dump()))
 	}
@@ -133,7 +143,11 @@ num gc:     %d
 `, mem.Alloc, mem.TotalAlloc, mem.Mallocs, mem.HeapAlloc, mem.HeapObjects, mem.NumGC)
 	}
 
-	fmt.Printf("OUT: 0x%x\n", ret)
+	fmt.Printf("OUT: 0x%x", ret)
+	if e != nil {
+		fmt.Printf(" error: %v", e)
+	}
+	fmt.Println()
 }
 
 func main() {