OSDT Weekly 第152期

近期活动

上海终于free了！ 6月份估计可以准备做点活动了。

编译社区的八卦信息

• C++ 动态新闻推送 第64期 URL

GCC

• Welcome GCC GSoC 2022，今年六个参与者 https://gcc.gnu.org/pipermail/gcc-patches/2022-May/595557.html

  • Faisal Abbas will be working on "Complete Support for Constant Folding in GCC Rust Front-end." This project will be mentored by Philip Herron.

  • Immad Mir will "Extend GCCs static analyzer to support checking for POSIX file descriptor APIs" and the project will be mentored by David Malcolm.

  • Andrew Naguib will also work on a Rust front-end project, specifically on "Improving debugging experience by enhancing the HIR dump." The project will be mentored by Arthur Cohen and Philip Herron.

  • Nitin Kumar will "Bypass assembler when generating LTO object files" and in that effort will be mentored by Jan Hubicka and myself.

  • Tim Lange will add "New checkers for GCC static analyzer" and will be mentored by David Malcolm.

  • Wileam Phan has succeeded with a project on "Accelerating Fortran DO CONCURRENT in GCC." The mentors will be Tobias Burnus and Thomas Schwinge.

• x64和AArch64后端基本稳定，目前就RISC-V后端的patch最多 [PATCH 00/21] *** Add RVV (RISC-V 'V' Extension) support *** https://gcc.gnu.org/pipermail/gcc-patches/2022-May/595903.html

  PATCH v3 0/9] [RISC-V] Atomics improvements https://gcc.gnu.org/pipermail/gcc-patches/2022-May/595712.html

  [PATCH v1 0/3] RISC-V: Improve sequences with shifted zero-extended operands https://gcc.gnu.org/pipermail/gcc-patches/2022-May/595557.html

• [PATCH 0/5] Implement abstract vrange class. https://gcc.gnu.org/pipermail/gcc-patches/2022-May/595878.html

Binutils/GDB

• [PATCH v2] Add support for nanoMIPS architecture https://sourceware.org/pipermail/binutils/2022-May/121102.html

• [PATCH v3 0/3] RISCV: Improve linker time complexity https://sourceware.org/pipermail/binutils/2022-May/121077.html

• [PATCH 0/5] x86/Intel: AVX512 syntax enhancements https://sourceware.org/pipermail/binutils/2022-May/121057.html

• [PATCH 0/4] gas: Add support for LLVM addrsig and addrsig_sym. https://sourceware.org/pipermail/binutils/2022-May/121017.html

• [PATCH] gdbserver: Add LoongArch/Linux port support https://sourceware.org/pipermail/gdb-patches/2022-May/189600.html

• [PATCH] gdbserver: Add LoongArch/Linux port support https://sourceware.org/pipermail/gdb-patches/2022-May/189427.html

GLIBC

• [PATCH] AArch64: Add SVE memcpy https://sourceware.org/pipermail/libc-alpha/2022-May/139159.html

• [PATCH 0/5] Use generic sinf, cosf, and sincosf for i686 https://sourceware.org/pipermail/libc-alpha/2022-May/139238.html

• [PATCH v3 00/12] Fix various NPTL synchronization issues https://sourceware.org/pipermail/libc-alpha/2022-May/139208.html

LLVM/Clang/LLDB/LLD

本节内容来自 LLVM Weekly 第 439 期， Alex Bradbury 大哥持续稳定输出。

• 收藏： Krister Walfridsson blogged about branch / conditional move and compiler optimisations.

• 围观： LLVM 14.0.4 was released.

• CHERI团队很强的样子： Lewis Revill announced monthly sync-ups on CHERI support in upstream LLVM and Rust.

• 有用？ Min-Yih Hsu proposed always printing type aliases for certain types in the MLIR LLVM dialect.

• 不知道有没有办法测试下性能改进： The RISC-V VSETVLI insertion pass was modified to perform a limited form of partial redundancy elimination. a95ecb2.

• 好消息： Various stack frame alignment bugs with the RISC-V Vector extension were fixed. cb8681a, 08c9fb8.

QEMU (RISC-V)

• [PATCH v2 0/3] target/riscv: Make CPU property names lowercase (w/ capitalized aliases), https://lists.gnu.org/archive/html/qemu-riscv/2022-05/msg00411.html

• [PATCH v3 0/4] QEMU RISC-V nested virtualization fixes, https://lists.gnu.org/archive/html/qemu-riscv/2022-05/msg00425.html

• [PATCH v3] target/riscv: add support for zmmul extension v0.1, https://lists.gnu.org/archive/html/qemu-riscv/2022-05/msg00441.html

• [PATCH v5 0/3] Implement Sstc extension, https://lists.gnu.org/archive/html/qemu-riscv/2022-05/msg00443.html

• [PATCH v2] target/riscv: Don't expose the CPU properties on names CPUs, https://lists.gnu.org/archive/html/qemu-riscv/2022-05/msg00449.html

RISC-V in China

• 上海的 RISC-V 厂商终于松了一口气，可以回到自己的办公室，给已经枯萎的花花草草浇浇水，尝试起死回生。

RT-Thread 社区

• 风平浪静

TVM / MLIR / AI Compilers

• 风平浪静

本周工具链岗位

往期社招及实习生招聘长期有效。

• 瀚博半导体---编译器岗(AI/GPU类)火热开放中
• Intel 招聘 Compiler Engineer 和 Compiler Validation Engineer（上海）
• 大疆芯片部门招募编译器、模拟器、调度框架方向高级工程师
• PLCT实验室 libcxx-simd 项目实习生招聘
• 地平线-编译器研发工程师（北京/上海）
• RISC-V操作系统团队招聘测试工程师
• (远程/上海)Marvell DPU 部门招聘编译器研发
• (上海) 编译器开发工程师 - 芯旺微电子
• 平头哥AI芯片部编译及工具链团队招聘 - 校招+社招
• (腾讯)编译器高级研发工程师 （北京/上海/杭州/深圳）

本周推荐阅读

本周推荐：《格差社会》

作者：橘木俊诏

译者：丁曼

推荐：小编1号

格差社会可以简单理解为出现了明显的阶层差异（并且固化）的社会。直接相关的概念就是基尼系数。中国大陆的基尼系数已经高到了需要刻意淡化的程度（最近十年没有听到了，对吧？）。由于本书是日本学者写日本的社会现状，所以一方面可以安心的阅读，另一方面可以偶尔反观自身的环境，思考可能的努力方向。

本书并不是充满情感的在描述个体。相反，更多的是从统计数据、OECD国家之间的对比、日本政府的各项文化和经济政策的区分来尝试给出一个全面的描述。不过小编1号个人的看法是觉得在后半部分就有些琐碎的列举了，提供的建议并没有让我感觉意外或觉得有用。

适合没有关注过社会阶层固化和贫困问题的小伙伴阅读。如果能够跟《失去的二十年》对比阅读，或许能够更多收获。