Differences of Clang compilation between LLVM and the third-party OLLVM compiler and its impact on Bitcode

1, Concept introduction: LLVM and OLLVM LLVM is a complete compiler architecture, in which the front-end compiler uses clang. The code is compiled by LLVM: Among them, explain IR (also known as BitCode). LLVM compiler adds intermediary code to the traditional three-tier model. After the source code ...

Posted on Wed, 05 Feb 2020 04:51:51 -0800 by raahatazim

7-48 use of "append()erase() to move the string left circularly

Enter a string and a non negative integer N, which requires the string to be rotated left N times. Input format: Enter a non empty string ending with carriage return with a length of no more than 100 characters in line 1, and a non negative integer N in line 2. Output format: Output the string after N l ...

Posted on Wed, 05 Feb 2020 02:54:31 -0800 by techevan

JAVA and contract: CopyOnWriteArrayList

CopyOnWriteArrayList implements the List interface. You can see from its name that it copies an array when writing data. CopyOnWriteArrayList is an array structure. Data writing can be described as obtaining lock first, copying the data of old array to new array, inserting data into new array, and repla ...

Posted on Tue, 04 Feb 2020 22:13:49 -0800 by irishprogrammin

[Ynoi2015] glory at this moment (Mo team + numerical divide and conquer + Pollard Ou rho)

Question: https://www.luogu.com.cn/problem/P5071         Title Solution (๑̀ㅂ́́و✧) favorable comments on the topic (๑̀ㅂ́) ✧ ٩ (๑◡๑๑๑) the first Ynoi ٩ (๑◡๑) in life First, use PR to decompose the prime factor of all numbers In the case of Mo team, the idea is relatively simple. By directly ...

Posted on Tue, 04 Feb 2020 21:13:09 -0800 by ONiX

python learning - Crawler skills

Article directory requests module Crawl Baidu's source code and save it locally. About the request parameters in the url to execute the specific request. Send post request Anti reptile Processing cookie requests module The crawler's actions are all crawled in the source code corresponding to t ...

Posted on Tue, 04 Feb 2020 09:32:55 -0800 by krraleigh

Common properties and methods of js built-in objects (Array | String | Date | Math)

js built in object: Array String Math Date   <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <script> // 1,Constructor method to create an array var arr=new Array(); console.log(arr);//[] var ...

Posted on Tue, 04 Feb 2020 07:16:54 -0800 by Tonsil

Details of python datetime module

1, Introduction to datetime module (1) The datetime module contains the following classes: Class name Function description date Date object, common attributes are year, month, day time Time object datetime Date time object, commonly used attributes are hour, minute, second, microsecond datetime_CAPI ...

Posted on Tue, 04 Feb 2020 06:31:06 -0800 by morphius

Machine learning feature Engineering

Python machine learning 3-day quick start python machine learning in 2018 [dark horse programmer] (2) Characteristic Engineering 1. Dictionary feature extraction from sklearn.feature_extraction import DictVectorizer def dict_demo(): ''' //Dictionary feature extraction :return: ' ...

Posted on Mon, 03 Feb 2020 09:03:03 -0800 by MitchEvans

Python basic syntax - rookie tutorial - Chapter 4: Python 3 operators

Learning website: https://www.runoob.com/python/python-basic-syntax.html Generate notes after running code Unfinished part:: = walrus operator not attemptedUnfinished part: operator priority not attempted #The code is as follows: # Chapter4: Python 3 operator print("\nchapter4:Python3 operator\n") print ...

Posted on Mon, 03 Feb 2020 00:28:32 -0800 by waynem801

Study of Vue takeout project

Using svg to display loading prompt interface Here, we can't use v-for="(shop, index) in shops" for svg ul. Our purpose is to display the interface like this when we don't get data. When we use it, we can't display it. Therefore, v-for="items in 6" needs to be like this, Comment ...

Posted on Sun, 02 Feb 2020 07:17:52 -0800 by rajavel