GNU Tools Weekly News Week 39 (May 24, 2026)

[GNU Tools weekly via Gdb <gdb@sourceware.org>]

GNU Tools Weekly News Week 39 (May 24, 2026)

Release updates for GNU toolchain:
 * None

GNU toolchain conference reminders:
 * FOSSY 2026 toolchain track North America, Aug 6-9 (Vancouver, Canada)
  * Call for Proposals: https://2026.fossy.ca/call-for-proposals/
 * GNU Tools Cauldron 2026, Fri-Sun, October 2-4 (Prague, Czechia)
  * https://gcc.gnu.org/wiki/cauldron2026
  * https://conf.gnu-tools-cauldron.org/prg26/cfp
 * Toolchains Track at LPC 2026, October 7th (Prague, Czechia)
  * https://lpc.events/event/20/abstracts/

General/big GNU toolchain news (including sourceware news):
 * BPF support in GCC 16 and beyond
  * https://lwn.net/Articles/1071973/
 * Building a Host-Tuned GCC to Make GCC Compile Faster
  * https://peter0x44.github.io/posts/super-gcc/
 * Using the Optimizer to Prove Safety Properties at Compile Time
  * https://uecker.codeberg.page/2026-05-22.html

GCC easy issue to tackle of the week:
 * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125442
  * Missed (x == 0) | ((x | y) == 0) to (x == 0)
  * Reach out to Andrea Pinski <andrew.pinski@oss.qualcomm.com> for
mentoring on this issue.
  * Previous ones are listed on https://gcc.gnu.org/wiki/EasyIssuesOfTheWeek

GCC commits:
 * https://gcc.gnu.org/r17-560 - https://gcc.gnu.org/r17-711 : 52 commits
 * middle-end: Optimize reversed CRC table-based implementation
  * https://gcc.gnu.org/r17-567-g7034f85fb6577a
 * RISC-V: Add xt-c9501fdvt CPU support
  * https://gcc.gnu.org/r17-579-g6a18e85213ee6c
 * rs6000: Adding missed ISA 3.0 atomic memory operation instructions
  * https://gcc.gnu.org/r17-586-g6953b4ea86a669
 * libstdc++: Update tzdata to 2026b
  * https://gcc.gnu.org/r17-611-g120d284e9bbb33
 * cselib speedup
  * https://gcc.gnu.org/r17-628-g683b5ca6a5b47b
  * https://gcc.gnu.org/r17-629-g582adc3c97b1e0
  * https://gcc.gnu.org/r17-630-g02d1871483758b
 * AArch64: Add PIC/PIE support to large model
  * https://gcc.gnu.org/r17-652-gb4aa063fe4a414
 * libffi: Sync with libffi 3.5.2
  * https://gcc.gnu.org/r17-657-g68927076526a15
 * c++, libstdc++: Implement C++26 P3074R7 and CWG3189 - trivial unions
  * https://gcc.gnu.org/r17-671-gca6cd7cb48512d
 * match: Handle X != INT_MIN ? -X : INT_MIN
  * https://gcc.gnu.org/r17-669-g33cd7bbb32c5ee
  * Easy issue of the week: Week 37 (May 10, 2026)
 * match: Optimize `(~y & x) ^ y` into (y | x) [PR125104]
  * https://gcc.gnu.org/r17-705-g365e5618bc6fcb
  * Easy issue of the week: Week 36 (May 3, 2026)
 * fold: remove fold_overflow_warning
  * https://gcc.gnu.org/r17-700-g34c81df45aea8e though r17-688-g3b65feed776df4
 * analyzer: fix pointer comparisons
  * https://gcc.gnu.org/r17-609
 * analyzer: rename --param=analyzer-{bb->supernode}-explosion-factor=
  * https://gcc.gnu.org/r17-576
 * analyzer: add pointer diff folding
  * https://gcc.gnu.org/r17-626
 * libstdc++: optimize std::uninitialized_move{,_n}() to memcpy when possible
  * https://gcc.gnu.org/r17-570-g79e29562907b45

GCC discussion:
 * Is it time to take the middle-end stringop/array warnings out of -Wall?
  * https://inbox.sourceware.org/gcc/CAH6eHdRfEVsGjbJ__kU5AR9BfVdLQZ_iGGDZa=yQnT4fgG2P6w@mail.gmail.com/
 * Constant divisions not converted to multiplications
  * https://inbox.sourceware.org/gcc/1BDAC475-C1FD-457D-8EB3-C65F7B40ED88@aruba.it/
 * [RFC] Factoring common pure operations across PHIs / branches to
reduce duplicated sqrt calls
  * https://inbox.sourceware.org/gcc/1106967D-67C5-44CE-8924-03159CA31F1C@hygon.cn/
 * PowerPC GCC maintainer
  * https://inbox.sourceware.org/gcc/ag1kUEzAtdVp6HmY@cowardly-lion.the-meissners.org/

GCC bugzilla stats
 * 81 new issues filed
 * 46 issues closed

glibc commits:
 * AArch64: Optimize memcmp for Kunpeng 950 with SVE
  * https://sourceware.org/cgit/glibc/commit/?id=3237d63b8462764e282cd8de79a02558071d4348
 * x86: Lower non-temporal copy threshold for Hygon
  * https://sourceware.org/cgit/glibc/commit/?id=213ffdfbbae6d4cb4e8dd4a9e3e57c69127620c4
 * x86: Fix non-temporal memset unreachable on AMD Zen 3/4/5
  * https://sourceware.org/cgit/glibc/commit/?id=54abc8566fea592e795cb443949266ef206462a8
 * aarch64: Vectorise special cases for SVE inverse hyperbolics
  * https://sourceware.org/cgit/glibc/commit/?id=f7eea1b2585b7b8c1f3ee9646627a9cf03fc33f2
 * aarch64: Vectorise special cases for SVE log1p(f)
  * https://sourceware.org/cgit/glibc/commit/?id=a7b6e534629c821e456955a00cf68bf889a601a8

glibc discussion:
 * How many mailing lists does glibc need or use? Closing 4 lists.
  * https://inbox.sourceware.org/libc-alpha/m1v7cfqwxr.fsf@gmail.com/T/#mc8bc3aa6ed6e7e4f72a6ba2e9f9cdf74c4a0e1e2
 * Introduction and interest in contributing to glibc
  * https://inbox.sourceware.org/libc-alpha/CAFPohwASPGQHreidwNTR3Eo81f_TfsajkF0sH2qZFKqSUQ47mg@mail.gmail.com/
  * NOTE this newsletter could use some easy issues of the week for
glibc and a mentor to reach out to for it

binutils/gdb commits:
 * gdb/aarch64: record/replay support for RPRFM, PRFM (reg), PRFUM
  * https://sourceware.org/cgit/binutils-gdb/commit/?id=f6c1ca239d932db39a6f19d9bd343f4f4fddba76
 * gdb: Implement native TLS support on Windows
  * https://sourceware.org/cgit/binutils-gdb/commit/?id=9d7734ef4fc74e448deb00824fc0504c0570c387
 *

gdb discussion:
 *

binutils discussion:
 *