llvm

clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)

由 梦想与她 提交于 2020-06-24 21:17:23
问题 I don't know what causes it. It does not happen at iPhone 5 and simulators. It have been happened only my original device iPhone 7. fatal error: error in backend: Error while trying to spill X0 from class GPR64: Cannot scavenge register without an emergency spill slot! clang: error: clang frontend command failed with exit code 70 (use -v to see invocation) Apple LLVM version 9.0.0 (clang-900.0.34.1) Target: aarch64-apple-darwin16.7.0 Thread model: posix InstalledDir: /Applications/Xcode-beta

clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)

由 ◇◆丶佛笑我妖孽 提交于 2020-06-24 21:17:01
问题 I don't know what causes it. It does not happen at iPhone 5 and simulators. It have been happened only my original device iPhone 7. fatal error: error in backend: Error while trying to spill X0 from class GPR64: Cannot scavenge register without an emergency spill slot! clang: error: clang frontend command failed with exit code 70 (use -v to see invocation) Apple LLVM version 9.0.0 (clang-900.0.34.1) Target: aarch64-apple-darwin16.7.0 Thread model: posix InstalledDir: /Applications/Xcode-beta

Specifying the DEF file when compiling a DLL with Clang

由 a 夏天 提交于 2020-06-17 09:39:27
问题 I am trying to compile a DLL using clang in windows clang -shared structs.c -o structs.dll but the symbols aren't being exported.. If I add __declspec(dllexport) to my declarations in structs.h, They symbols are exported to DLL. But instead, I would like to do this using a DEF file (structs.def) I created, But I can't find how I pass the DEF file to clang. Any help is appeciated :/ 回答1: Finally figured it out - We can use the -Wl flag in clang to pass some comma-separated arguments to the

Specifying the DEF file when compiling a DLL with Clang

由 丶灬走出姿态 提交于 2020-06-17 09:39:26
问题 I am trying to compile a DLL using clang in windows clang -shared structs.c -o structs.dll but the symbols aren't being exported.. If I add __declspec(dllexport) to my declarations in structs.h, They symbols are exported to DLL. But instead, I would like to do this using a DEF file (structs.def) I created, But I can't find how I pass the DEF file to clang. Any help is appeciated :/ 回答1: Finally figured it out - We can use the -Wl flag in clang to pass some comma-separated arguments to the

How do I interface with extern variables from Cheerp/js?

由 烂漫一生 提交于 2020-06-17 08:03:08
问题 Cheerp is a C++ to js/wasm transpiler. Screeps is a programming videogame. How do I read in the Game.time variable from my transpiled C++ code? (in screeps) #include <cheerp/client.h> #include <iostream> using namespace std; namespace client { class Game : public Object { public: static volatile double time; }; extern volatile Game &Game; } void webMain() { cout << __TIME__ << ": The current time is: " << client::Game.time << endl; } I have tried any number of variations on: extern , volatile

LLVM Profile Error: Failed to write file “default.profraw”: Permission denied

由 核能气质少年 提交于 2020-05-24 08:40:07
问题 I'm getting the error LLVM Profile Error: Failed to write file "default.profraw": Permission denied after running unit tests in Xcode. I don't know where Xcode is trying to write this file to. What folder should I grant permissions for? 回答1: Had this warning when I forgot to enable code coverage: 回答2: Xcode 10+ Enable Code Coverage for Test scheme. 回答3: Cleaning my build folder eliminated the error for me. (Option-Shift-Command K.) I'm using Xcode Version 9.2 (9C40b). The error started when I

Is it possible to get LLVM-IR from Assembly file?

由 我与影子孤独终老i 提交于 2020-05-23 21:43:11
问题 I compiled .S file using command: clang-8 -c funcs.s -o funcs.o -emit-llvm I found, that .o file was generated in ELF format. I was expected to see llvm-ir format (with "BC" characters at the beginning of resulting file). Seems, Clang ignores "-emit-llvm" flag. 回答1: Your question isn't fundamentally different from Is it possible to translate an assembly language to LLVM IR, optimize it and then recompile it to a different architecture?. asm source and binary executables / object files are

Dot file not genearting for -view-isel-dags option

由 浪尽此生 提交于 2020-05-14 09:12:09
问题 While trying to see the SelectionDag nodes generated during the instruction selection phase using LLVM (built from sources with debug mode enabled), I am using the below command which is not creating Graphviz DOT file. llc -view-isel-dags sum.bc Instead it is creating sum.s file. Is there something I'm missing here? sum.c int sum(int x, int y) { return x+y; } sum.bc $ clang -emit-llvm sum.c -c -o sum.bc LLVM information $ llc -help-hidden | grep 'view-isel' -view-isel-dags - Pop up a window

iOS开发——Block内存管理实例分析

由 大兔子大兔子 提交于 2020-05-09 17:41:04
说道block大家都不陌生，内存管理问题也是开发者最头疼的问题，网上很多讲block的博客，但大都是理论性多点，今天结合一些实例来讲解下。 存储域 首先和大家聊聊block的存储域，根据block在内存中的位置，block被分为三种类型： NSGlobalBlock NSStackBlock NSMallocBlock 从字面意思上大家也可以看出来 1、 NSGlobalBlock 是位于全局区的block，它是设置在程序的数据区域（.data区）中。 2、 NSStackBlock 是位于栈区，超出变量作用域，栈上的Block以及 ____block__变量都被销毁。 3、 NSMallocBlock 是位于堆区，在变量作用域结束时不受影响。 注意：在 ARC 开启的情况下，将只会有 NSConcreteGlobalBlock 和 NSConcreteMallocBlock 类型的 block。 作为一个开发者，有一个学习的氛围跟一个交流圈子特别重要，这是一个我的iOS交流群： 413038000 ，不管你是小白还是大牛欢迎入驻 ，分享BAT,阿里面试题、面试经验，讨论技术， 大家一起交流学习成长！ 推荐阅读： iOS开发——2020 最新 BAT面试题合集（持续更新中） 说了这么多理论的东西，有些人可能很懵，觉得讲这些有什么用呢，我平时使用block并没有什么问题啊，好了

(转)WASM（WebAssember）快速了解第四篇——创建和使用WebAssembly模块

由 梦想与她 提交于 2020-05-07 20:21:03
这是有关WebAssembly的系列文章的第四部分，如果您还没有阅读其他文章，我们建议 从头开始 。 WebAssembly 是一种在网页上运行JavaScript以外的编程语言的方法。 过去，当您想在浏览器中运行代码以与网页的不同部分进行交互时，唯一的选择就是JavaScript。 因此，当人们谈论WebAssembly的速度很快时，Apple与Apple的比较就是JavaScript。 但这并不意味着这是两种情况，要么您正在使用WebAssembly，要么您正在使用JavaScript。 实际上，我们期望开发人员将在同一应用程序中同时使用WebAssembly和JavaScript。 即使您自己不编写WebAssembly，也可以利用它。 WebAssembly模块定义可从JavaScript使用的功能。 因此，就像您今天从npm下载lodash之类的模块并调用其API中的函数一样，将来您将能够下载WebAssembly模块。 因此，让我们看看如何创建WebAssembly模块，然后如何从JavaScript中使用它们。 WebAssembly适合哪里？ 在有关 汇编 的文章中 ，我谈到了编译器如何采用高级编程语言并将其转换为机器代码。 WebAssembly在哪里适合这张图片？ 您可能会认为这只是目标汇编语言中的另一种。 这是真的，只是每种语言（x86，ARM
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