OSDT Weekly 第209期

近期活动

• 按照十城相聚的计划，7月23日在广州meetup！希望不要刮台风，欢迎大家投稿分享～

编译社区的八卦信息

• C++ 中文周刊 第 120 期

GCC

• wishlist: support for shorter pointers https://gcc.gnu.org/pipermail/gcc/2023-June/241868.html 讨论过程中的观点/干货很多，对底软ABI设计感兴趣的同学可以看看

• [RFC] Bridging the gap between the Linux Kernel Memory Consistency Model (LKMM) and C11/C++11 atomics https://gcc.gnu.org/pipermail/gcc/2023-July/241952.html

• [PATCH v1 0/6] Add Loongson SX/ASX instruction support to LoongArch target. https://gcc.gnu.org/pipermail/gcc-patches/2023-June/623262.html

• [PATCH v5 0/19] Support early break/return auto-vectorization https://gcc.gnu.org/pipermail/gcc-patches/2023-June/623071.html

• [PATCH] RISC-V: improve codegen for repeating large constants [3] https://gcc.gnu.org/pipermail/gcc-patches/2023-June/623365.html

• [PATCH] RISC-V: Support vfwnmacc/vfwmsac/vfwnmsac combine lowering https://gcc.gnu.org/pipermail/gcc-patches/2023-June/623064.html

Binutils/GDB

• [PATCH v6 00/15] RISC-V: Add support for vector crypto extensions https://sourceware.org/pipermail/binutils/2023-July/128206.html

• [PATCH 00/10] x86: disassembler table entry folding plus some cleanup https://sourceware.org/pipermail/binutils/2023-July/128269.html

• [PATCH] [RISC-V] Optimize GP-relative addressing for linker. https://sourceware.org/pipermail/binutils/2023-July/128231.html

• [PATCH 0/6] SME2 support for AArch64 gdb/gdbserver on Linux https://sourceware.org/pipermail/gdb-patches/2023-June/200573.html

GLIBC

• [PATCH] x86_64: Implement AVX2 version of strlcpy/wcslcpy function https://sourceware.org/pipermail/libc-alpha/2023-July/149541.html

• [PATCH v4 00/15] Allow glibc to be built with _FORTIFY_SOURCE https://sourceware.org/pipermail/libc-alpha/2023-July/149620.html

LLVM/Clang/LLDB/LLD

以下值得关注的内容来自小编9号的整理和推荐（主要是 LLVM IR 变更）：

• https://reviews.llvm.org/D154051 Always allow getelementptr inbounds with zero offset

本节内容来自 LLVM Weekly 第 496 期， Alex Bradbury 大哥持续稳定输出。

• 注意： The call for papers is open for the ninth annual LLVM in HPC Workshop, with submissions due on August 16th.

• 下次聚会可以讨论下： My Igalia colleague Job Noorman has written up a great blog post about his work to enable RISC-V support in the BOLT post-link optimiser. It gives the initial technical details (more to follow) and I think gives a good example of how investment from both the contributor and the upstream reviewers can lead to a better solution that benefits everyone - in this case, migrating BOLT to a newer runtime linking framework and avoiding the need for us to support two RISC-V runtime linkers in parallel within LLVM.

• 有伙伴看过么，这是啥？ Andrew Kaster posted an RFC on adding support for SerenityOS to LLVM.

• Flang优化总结贴： In response to a question, Kiran Chandramohan summarised the status of optimisation in Flang.

• LICM 算法要动起来影响面估计不小： Antoine Moynault started a discussion thread about loop invariant code motion and code size, which contains some measurements later on in the thread.

• MaskRay 笔耕不缀： Fangrui Song posted an RFC on adding support to LLD to compress arbitrary sections (much as it currently supports --compress-debug-sections). Peter Smith shared experiences from a similar feature in another toolchain.

• 是时候看看16位精度了： BFloat16 support was added to the NVPTX backend. 250f2bb.

QEMU (RISC-V)

• [PATCH v5 1/1] target/riscv: Add RVV registers to log, https://lists.gnu.org/archive/html/qemu-riscv/2023-06/msg00760.html

• [PATCH 0/2] accel/tcg: Remove qemu_tcg_mttcg_enabled(), https://lists.gnu.org/archive/html/qemu-riscv/2023-06/msg00773.html

• [PATCH 0/2] hw/riscv/virt: Restrict ACLINT to TCG, https://lists.gnu.org/archive/html/qemu-riscv/2023-06/msg00777.html

• [PATCH v7 00/20] target/riscv, KVM: fixes and enhancements, https://lists.gnu.org/archive/html/qemu-riscv/2023-06/msg00813.html

• [PATCH v5] dt-bindings: riscv: deprecate riscv,isa, https://lists.gnu.org/archive/html/qemu-riscv/2023-07/msg00003.html

• [PATCH v7 00/15] Add RISC-V vector cryptographic instruction set support, https://lists.gnu.org/archive/html/qemu-riscv/2023-07/msg00004.html

• [PATCH] riscv: Generate devicetree only after machine initialization is complete, https://lists.gnu.org/archive/html/qemu-riscv/2023-07/msg00038.html

• [PATCH v7] riscv: Add support for the Zfa extension, https://lists.gnu.org/archive/html/qemu-riscv/2023-07/msg00041.html

• [PATCH v3 0/1] target/riscv: Add support for BF16 extensions, https://lists.gnu.org/archive/html/qemu-riscv/2023-07/msg00043.html

• [PATCH v4 00/37] crypto: Provide aes-round.h and host accel, https://lists.gnu.org/archive/html/qemu-riscv/2023-07/msg00064.html

• [PATCH v2 00/16] target/riscv: Allow building without TCG (KVM-only so far), https://lists.gnu.org/archive/html/qemu-riscv/2023-07/msg00092.html

• [PATCH v2 1/2] target/riscv: Remove redundant check in pmp_is_locked, https://lists.gnu.org/archive/html/qemu-riscv/2023-07/msg00113.html

• [PATCH] target/riscv: Add Zihintntl extension ISA string to DTS, https://lists.gnu.org/archive/html/qemu-riscv/2023-07/msg00115.html

RISC-V in China

• 热烈祝贺中国开放指令（RISC-V）联盟广东省中心（筹）成立
• CCFSys2023 | 包云岗研究员和夏虞斌教授邀你共话RISC-V架构的前沿技术和应用

RT-Thread 社区

• 2023RT-Thread操作系统大学生夏令营报名开启！

TVM / AI Compilers

• 风平浪静。招募志愿者小编。

本周工具链岗位

往期社招及实习生招聘长期有效。

• 开源实习：算能科技招募AI开源工具链开发（TPU-MLIR项目）
• DynamoRIO RISC-V 移植开发实习生招聘（PLCT实验室）
• PLCT实验室开始招募 Mono 系统开发实习生，负责 RISC-V 移植及优化
• PLCT实验室长期招募安卓系统（AOSP）开发实习生，升级和维护 AOSP for RISC-V 开源项目

本周推荐阅读

本周推荐：《四大圣哲》

作者： [德]卡尔•雅斯贝尔斯

译者： 傅佩荣

推荐：小编1号

可能是因为看了很多同类文字的缘故，这本很多我所尊崇的学者推荐的《四大圣哲》读起来并没有灵魂升华的感觉。她更像是一个希望吸引你注意力的故事。

阅读起来比较轻松，不会觉得时间难熬。没有多少历史背景知识也可以阅读。