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This commit is contained in:
Jeffrey Wilcke 2016-09-26 11:57:17 +02:00
parent d010b982ae
commit 50281f1d17
1 changed files with 19 additions and 0 deletions
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19
core/vm/program_optimiser.go
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@ -20,6 +20,7 @@ import (
"math/big" "math/big"
"time" "time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/logger" "github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog" "github.com/ethereum/go-ethereum/logger/glog"
) )
@ -85,6 +86,8 @@ func OptimiseProgram(program *Program) {
statsJump++ statsJump++
load = nil load = nil
case instr.op == EXTCODESIZE:
program.instructions[i] = codesize{}
default: default:
// create a new N pushes segment // create a new N pushes segment
if len(load) > 1 { if len(load) > 1 {
@ -97,6 +100,22 @@ func OptimiseProgram(program *Program) {
} }
} }
type codesize struct {
size *big.Int
}
func (instr codesize) do(program *Program, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
if instr.size == nil {
addr := common.BigToAddress(stack.pop())
instr.size = big.NewInt(int64(len(env.Db().GetCode(addr))))
}
stack.push(instr.size)
return nil, nil
}
func (codesize) Op() OpCode { return EXTCODESIZE }
func (codesize) halts() bool { return false }
// makePushSeg creates a new push segment from N amount of push instructions // makePushSeg creates a new push segment from N amount of push instructions
func makePushSeg(instrs []instruction) (pushSeg, int) { func makePushSeg(instrs []instruction) (pushSeg, int) {
var ( var (