OSDT Weekly 第61期 · OSDT Weekly

近期活动

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编译社区的八卦信息

GCC

看到 Bin Cheng 大佬又开始活跃的 maintain 了 [PATCH 3/4] ivopts: Consider cost_step on different forms during unrolling https://gcc.gnu.org/pipermail/gcc-patches/2020-September/553066.html
Maciej W. Rozycki 提交了一个 WIP 的 RISC-V patch。不过好像没人理他。 [WIP][PATCH] RISC-V: Add -mgprel option for GP-relative addressing https://gcc.gnu.org/pipermail/gcc-patches/2020-August/553018.html

Binutils/GDB

Cooper Qu 提交了几个 patch 给 CSKY 后端 [PATCH] CSKY: Refine operand format error reporting. https://sourceware.org/pipermail/binutils/2020-August/113096.html [PATCH] CSKY: Add warning when -mdsp and -mcpu=ck803ern are both added. https://sourceware.org/pipermail/binutils/2020-August/113094.html
Nelson Chu 提出了一个改进化简并得到了r+，committed [PATCH] RISC-V: Treat R_RISCV_CALL and R_RISCV_CALL_PLT as the same in check_relocs. https://sourceware.org/pipermail/binutils/2020-August/113004.html

GLIBC

风平浪静

LLVM/Clang/LLDB/LLD

本节内容来自 LLVM Weekly 第348期， Alex Bradbury 大哥持续稳定输出。

The program for the 2020 Virtual LLVM Developers' Meeting has been announced and registration is now open.
The deadline to submit to this year's LLVM in HPC workshp has been extended to September 4th.
Stephen Tozer provided a heads-up about work to change llvm.dbg.value and DBG_VALUE to support multiple location operands.
Alexey Lapshin proposes llvm-dwarfutil, a dsymutil-like tool for ELF.
James Y Knight proposes to remove MMX support (other than the MC layer assembler definitions). The proposal is to implement the intrinsics in *mmintrin.h that currently use MMX in terms of SSE/SSE2 compiler builtins.
Xing Guo provided a report on their GSoC project to add DWARF support to yaml2obj.
Fangrui Song suggests making --warn-backrefs the default for LLD.
Stefan Stipanovic is intending to make intrinsics have attributes such as nofree, nosync, and willreturn by default and asks for anyone to share any concerns in the next ~2 weeks.
Support was added for heap profiling instrumentation. 7ed8124.
MC layer support was added for the RISC-V Vector Zvamo extension. 888c02d. StephenFan！ 🎉

RISC-V in China

明天 RISC-V Global Forum 就要开始了！北京时间下午3点，倪光南院士有一个专题报告哦～

TVM 社区

继续Apache孵化项目毕业进行时。

Mozilla

风平浪静。

方舟开源编译器社区

OpenArkCompiler Weekly - #26 August 30th 2020

社区动态：本周社区风平浪静。代码更新主要在主库和孵化器的MapleFE。

主库Commits:

添加孵化器项目到readme https://gitee.com/harmonyos/OpenArkCompiler/commit/84ea8be2a0c04f190e6e4a761bc1b9c22b70010c
[cg]add new cg phase https://gitee.com/harmonyos/OpenArkCompiler/commit/8d2f7e4f849e1260a04d80634f6723a85cccf25e

孵化器Commits:

[MapleFE]Support multiple arguments of callsite. https://gitee.com/openarkcompiler-incubator/MapleFE/commit/ba121f1489025d1f428d9689a23ddeeb5c88aad8
[MapleFE]Add CastNode for type casting explicit or implicit. https://gitee.com/openarkcompiler-incubator/MapleFE/commit/c32a13145c7543a189ad455760ac498981aa1492
[MapleFE]针对ASTTree有多个更新： https://gitee.com/openarkcompiler-incubator/MapleFE/commit/f96c7932b417a0d852af9dc3aa624e26992d5950 https://gitee.com/openarkcompiler-incubator/MapleFE/commit/97f6d71ddd01274007968516995b56b08db107b5 https://gitee.com/openarkcompiler-incubator/MapleFE/commit/f96c7932b417a0d852af9dc3aa624e26992d5950
[MapleFE]Added Package and Import rules of Java. https://gitee.com/openarkcompiler-incubator/MapleFE/commit/e47e631377c751e95ee1ad275f32723ff5670907

感谢提供：中科院软件所智能软件研究中心PLCT实验室史宁宁

其它社区八卦

欢迎感兴趣的小伙伴提 Pull Requests 完善内容。我们希望能够尽可能多的扩展下OSDT的覆盖范围。

This Week in Rust: 更了 https://this-week-in-rust.org/blog/2020/08/26/this-week-in-rust-353/

Golang Weekly: 更了 https://golangweekly.com/issues/327

WebAssembly Weekly: 更了 https://wasmweekly.news/issue-128/

Academic

看了看 OSDI 2020 accepted papers。现在要中个OSDI（不是OSDT😂）论文作者动辄十几个了。

本周工具链岗位

阿里巴巴有一个编译器团队新开放了高级编译器工程师的名额，做 GCC 和/或 LLVM 开发，主要是 middle end 优化， Arm 和 RISC-V 后端都是需要和欢迎的。有兴趣的小伙伴欢迎直接联系 马同学 liangbin.mj[at]alibaba-inc.com
PLCT Lab 持续招聘实习生和全职员工。 https://mp.weixin.qq.com/s/mKmZlbZYyMdT3FT-gJjcWA

本周推荐阅读

本周推荐：《企鹅公路》

作者：森见登美彦

翻译：郑晓兰

B站动画电影： https://www.bilibili.com/bangumi/play/ss28047

今天看到一句话，意外地回味了很久：「大概不会哪个小孩子的梦想是长大之后买一套房」。

我们自己在小学的时候在想什么？做科学家？宇航员？登月？还是在玩泥巴、滚铁环？

忘记了。都忘记了。

《企鹅公路》是一本关于小学生主人公青山进行科学实验和探险的故事。有同名的动画电影，非常好看。

哪里好看？从头到尾可能都是一些轻松的幽默和不算太意外的科幻设定。但是，

当我看完之后，夜深人静，总是开始会想起自己小时候的探险和研究经历。

真希望我以前也想男主角或者小女主角那么有科学精神，再多一点就好了。再多一点，或许就不会回归于平庸。

真希望我可以像故事中的爸爸那样，用一个小小的布袋，可以向小学生解释宇宙、把小学生当做研究的同行。这点还可以努力做到。

PS：这个故事的结局是理性悲伤的。早熟的人更早的看见悲伤，或许这也算是人生的一个小道理。