Light

Сломана кодогенерация about extended-js-subset HOT 5 OPEN

stepami commented on May 13, 2024

Сломана кодогенерация

from extended-js-subset.

Comments (5)

Stepami commented on May 13, 2024

Например, есть программа:

type int = number
type ints = int[]

function swap(array: ints, i: int, j: int) {
    let ai = array[i]
    array[i] = array[j]
    array[j] = ai
}

function partition(values: ints, l: int, r: int): int {
    let x = values[r]
    let less = l

    let i = l
    while (i < r) {
        let value = values[i]
        if (value <= x) {
            swap(values, i, less)
            less = less + 1
        }
        i = i + 1
    }
    swap(values, less, r)
    return less
}

function quickSortImpl(values: ints, l: int, r: int) {
    if (l < r) {
        let q = partition(values, l, r)
        quickSortImpl(values, l, q - 1)
        quickSortImpl(values, q + 1, r)
    }
}

function quickSort(values: ints) {
    let n = ~values
    if (n != 0) {
        quickSortImpl(values, 0, n - 1)
    }
}

let numbers = [6,2,4,3,7,1,5,]
quickSort(numbers)
print(numbers as string)

from extended-js-subset.

Stepami commented on May 13, 2024

Интерпретатор сгенерирует следующий набор инструкций:

0: Goto 7
1: BeginFunction swap
2: ai = array [] i
3: _t3 = array [] j
4: array[i] = _t3
5: array[j] = ai
6: Return
7: Goto 29
8: BeginFunction partition
9: x = values [] r
10: less = l
11: i = l
12: _t12 = i < r
13: IfNot _t12 Goto 24
14: value = values [] i
15: _t15 = value <= x
16: IfNot _t15 Goto 22
17: PushParameter array = values
18: PushParameter i = i
19: PushParameter j = less
20: Call (1, swap), 3
21: less = less + 1
22: i = i + 1
23: Goto 12
24: PushParameter array = values
25: PushParameter i = less
26: PushParameter j = r
27: Call (1, swap), 3
28: Return less
29: Goto 48
30: BeginFunction quickSortImpl
31: _t31 = l < r
32: IfNot _t31 Goto 47
33: PushParameter values = values
34: PushParameter l = l
35: PushParameter r = r
36: q = Call (8, partition), 3
37: PushParameter values = values
37: _t37 = q - 1
38: PushParameter l = l
40: PushParameter r = _t37
41: Call (30, quickSortImpl), 3
42: PushParameter values = values
42: _t42 = q + 1
44: PushParameter l = _t42
45: PushParameter r = r
46: Call (30, quickSortImpl), 3
47: Return
48: Goto 59
49: BeginFunction quickSort
50: n = ~values
51: _t51 = n != 0
52: IfNot _t51 Goto 58
53: _t53 = n - 1
53: PushParameter values = values
54: PushParameter l = 0
56: PushParameter r = _t53
57: Call (30, quickSortImpl), 3
58: Return
59: array numbers = [7]
60: numbers[0] = 6
61: numbers[1] = 2
62: numbers[2] = 4
63: numbers[3] = 3
64: numbers[4] = 7
65: numbers[5] = 1
66: numbers[6] = 5
67: PushParameter values = numbers
68: Call (49, quickSort), 1
69: _t69 = numbers as string
70: Print _t69
71: End

from extended-js-subset.

Stepami commented on May 13, 2024

В приведённой программе видно дублирующиеся адреса, которые приводят к бесконечному циклу внутри виртуалки

from extended-js-subset.

Stepami commented on May 13, 2024

Сейчас, вся кодогенерация размазана по узлам AST. Возможно, рефакторинг в #4 решит проблему.
Иначе, придётся изобретать новую систему адресации.

from extended-js-subset.

Stepami commented on May 13, 2024

Новую систему адресации всё же пришлось изобрести

from extended-js-subset.

Related Issues (20)

Recommend Projects

React

A declarative, efficient, and flexible JavaScript library for building user interfaces.
Vue.js

🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
Typescript

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
TensorFlow

An Open Source Machine Learning Framework for Everyone
Django

The Web framework for perfectionists with deadlines.
Laravel

A PHP framework for web artisans
D3

Bring data to life with SVG, Canvas and HTML. 📊📈🎉

Recommend Topics

javascript

JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
web

Some thing interesting about web. New door for the world.
server

A server is a program made to process requests and deliver data to clients.
Machine learning

Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Visualization

Some thing interesting about visualization, use data art
Game

Some thing interesting about game, make everyone happy.

Recommend Org

Facebook

We are working to build community through open source technology. NB: members must have two-factor auth.
Microsoft

Open source projects and samples from Microsoft.
Google

Google ❤️ Open Source for everyone.
Alibaba

Alibaba Open Source for everyone
D3

Data-Driven Documents codes.
Tencent

China tencent open source team.