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https://zhuanlan.zhihu.com/p/66793637 https://zhuanlan.zhihu.com/p/66909226 内容概要 什么是LLVM IR?如何得到IR? LLVM编译的流程，IR文件之间的链接简介 C++ name mangling的用途，“extern C"作用的极简介绍 IR文件的布局 IR中函数定义的结构，什么是BB，什么是CFG IR是一个强类型语言，如何用工具检查IR的合法性 如何理解 Language reference 常见的terminator instruction介绍 如何利用工具得到函数的CFG 什么是SSA？SSA的好处和问题，以及如何解决这个问题 参考文献 what is tail reursion make clang compile to ll -cc1的含义 clang和clang++的区别 what is a linkage unit? LLVM LanguageRef extern "C"的作用 what is name mangling what is static single assignment? what is reaching definition? 1. 什么是LLVM IR？ LLVM IR 是 LLVM Intermediate Representation，它是一种 low

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am attempting to store a large number of numpy structured array as datasets in a hdf5 file. For example, f['tree1'] = structured_array1 . . f['tree60000'] = structured_array60000 (there are ~ 60000 trees), About 70% of the way into reading the file, I get the error RuntimeError: Unable to register datatype atom (Can't insert duplicate key) This problem occurs only for an ascii file that is very large (10e7 lines, 5gb). It does not occur if the file is around (10e6 lines, 500mb). It also does not occur if I take out the datatype and just

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have been looking at LLVM lately, and I find it to be quite an interesting architecture. However, looking through the tutorial and the reference material, I can't see any examples of how I might implement a string data type. There is a lot of documentation about integers, reals, and other number types, and even arrays, functions and structures, but AFAIK nothing about strings. Would I have to add a new data type to the backend? Is there a way to use built-in data types? Any insight would be appreciated. 回答1: What is a string? An array of

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: A FnMut closure cannot be cloned, for obvious reasons, but a Fn closure has an immutable scope; is there some way to create a "duplicate" of a Fn closure? Trying to clone it results in: error [ E0599 ]: no method named `clone` found for type `std::boxed::Box<std::ops::Fn(i8, i8) -> i8 + std::marker::Send + 'static>` in the current scope --> src / main . rs : 22 : 25 | 22 | fp : self . fp . clone (), | ^^^^^ | = note : self . fp is a function , perhaps you wish to call it = note : the method `clone` exists but the following trait

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: This code is taken from a discussion going on here . someInstance.Fun(++k).Gun(10).Sun(k).Tun(); Is this code well-defined? Is ++k in Fun() evaluated before k in Sun()? What if k is user-defined type, not built-in type? And in what ways the above function calls order is different from this: eat(++k);drink(10);sleep(k); As far as I know, in both situations, there exists a sequence point after each function call . If so, then why can't the first case is also well-defined like the second one? Section 1.9.17 of the C++ ISO standard says this

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have an array: const adjacent: [(i8, i8); 8] = [(-1, -1), (-1, 0), (-1, 1), (-1, 0), (1, 0), (1, 1), (1, 0), (1, -1)]; This array represents all adjacent neighbors of a cell within a ROW x COLUMN grid. To iterate over this array to find all neighbors, I do for k in adjacent.into_iter() { let (i, c) = (k.0, k.1); if let Some(a) = grid.get(r+i, j+c) { /* ... */ } } The second line seems like it could be substituted for K, but this causes an error if you write for (i, c) in adjacency.into_iter() { ... error: type mismatch resolving `<core: