All,
During Connect the suggestion was made that each working group should have
its own IRC Channel for discussions and topics relating to the group in
particular (as opposed to #linaro which is 'generic' Linaro conversations).
Therefore I have just set up #linaro-tcwg on Freenode for the Toolchain
Working Group.
This channel is public and open to anyone who wants to talk with the TCWG
group about anything toolchain related.
Thanks,
Matt
--
Matthew Gretton-Dann
Toolchain Working Group, Linaro
# Progress #
* Flexible GDB target description work. [5/10]
As we'll add more and more files, need to clean up GDB build first.
Patch is OK, but need to reduce the duplication first. Yet another
clean up.
Start to think about the design of removing last usage of
MAX_REGISTER_SIZE. Still ongoing.
* Misc, [5/10]
** File cauldron expense.
** Improve gdb_mbuild.sh to build GDB for different supported targets.
# Plan #
* Connect.
--
Yao Qi
== Progress ==
o Linaro GCC/Validation
* Completed backports and branch merges
* Delivered 7.2 and 6.4 monthly source snapshots
* Reviewed infra patches
* Still some patches pending on upstream reviews
o LLVM
* Still learning
o Misc
* Various meetings and discussions.
== Plan ==
o Close remaining GCC tasks
Two weeks
* GNU Cauldron and vacation, [12/20]
# Progress #
* TCWG-1159, New design of GDB/GDBserver target description. [4/20]
Commit my patches, and fix some build failures. Done.
* Cauldron presentation and Linaro Connect SFO17 presentation. [3/20]
Done.
* Misc, catch up email, [1/20]
# Plan #
* Prepare a prototype about regcache, and compare with Alan's
implementation.
* Continue my target description work, for other non-actively-maintained
target descriptions.
--
Yao Qi
== Progress ==
* Infrastructure:
- patch reviews
* Benchmarking:
- minor bug fixes
* Snapshots/releases
- branch merge reviews
* GCC upstream validation:
- PR82120: adding a -mbranch-cost option to the arm backend does not
help with pr81588.c test failing on cortex-a5
- incorrectly reported a regression due to bisect problems (worth
100% chocolate ;-)
- still working on further reducing false alams
- problems with internal infrastructure
* binutils/gdb upstream validation:
- gdbserver build fixed by Yao
* GCC
- investigating portability of ubsan to bare-metal targets
- 'ARMv8 deprecated IT blocks' patch finally committed. Will look at
the remaining warnings.
* misc (conf-calls, meetings, emails, ....)
- Connect preparation (slides, ...)
== Next ==
* GCC upstream validation
* GCC/ubsan
* GCC/deprecated-IT blocks
The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2017.09
snapshot of Linaro GCC 6 and 7 source packages.
o The GCC 7 series introduced an ABI change for ARM targets by fixing a bug
(present since GCC 5, see link below) that affects conformance to the procedure
call standard (AAPCS). The bug affects some C++ code where class objects are
passed by value to functions and could result in incorrect or inconsistent code
being generated. If the option -Wpsabi is enabled (on by default) the compiler
will emit a diagnostic note for code that might be affected by this ABI change.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728
For an explanation of the changes please see the following website:
https://gcc.gnu.org/gcc-7/changes.html
o Linaro GCC 7 monthly snapshot[1] is based on FSF GCC 7.2+svn252337 and
includes performance improvements and bug fixes backported from mainline GCC.
The contents of this snapshot will be part of the 2017.11 stable[2] quarterly
release.
This snapshot tarball is available on:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.2-2017.09/
Interesting changes in this GCC source package snapshot include:
* Updates to GCC 7.2+svn252337
* Backports from mainline:
- Backport of [Bugfix] [AArch32] PR target/77308 surprisingly large
stack usage for sha512 on arm
- Backport of [AArch32] Fix ldrd offsets
- Backport of [AArch32] Remove %? string from some Advanced SIMD patterns
- Backport of [AArch64] Add optimized implementation of mersenne twister
- Backport of [AArch64] Add RDMA support to falkor port
- Backport of [AArch64] Fix big endian float immediate moves
- Backport of [AArch64] Fix missing optimization for CMP+AND
- Backport of [AArch64] Fix pattern guard relaxations that are
allowing more constants than they should
- Backport of [AArch64] Fix ThunderX fp vectorizer cost model
- Backport of [AArch64] Generate MLA when multiply + add vector by scalar
- Backport of [AArch64] Implement ALU_BRANCH fusion
- Backport of [AArch64] Improve aarch64 conditional compare usage
- Backport of [AArch64] Improve thunderx_vect_cost some more
- Backport of [AArch64] Move the check for any_condjump_p from
sched-deps to target macros
- Backport of [AArch64] Only allow 0s unconditionally for floating
point values
- Backport of [AArch64] Optimize float immediate moves-HF/DF/SF mode
- Backport of [AArch64] Optimize float immediate moves-infrastructure
- Backport of [AArch64] Optimize float immediate moves-testsuite
- Backport of [AArch64] Optimize integer immediate moves with partial masks
- Backport of [Tesstuite] Fix dg-require-stack-check
- Backport of [Testsuite] [AArch32] Add -mfloat-abi=hard to arm_neon_ok
- Backport of [Testsuite] [AArch64] Fix dbl_mov_immediate_1.c test
- Backport of [Testsuite] [AArch64] gcc.target/aarch64/ccmp_2.c: New test
- Backport of [Cleanup] [AArch32] PR target/68535 arm.c: 5 * set but not used
- Backport of [Doc] [AArch64] Clean up AArch64 options
o Linaro GCC 6 monthly snapshot[1] is based on FSF GCC 6.4+svn252072 and
includes performance improvements and bug fixes backported from mainline GCC.
This snapshot contents will be part of the next maintenance release.
This snapshot tarball is available on:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.4-2017.09/
Interesting changes in this GCC source package snapshot include:
* Updates to GCC 6.4+svn252072
o Subscribe to the important Linaro mailing lists and join our IRC channels to
stay on top of Linaro development.
** Linaro Toolchain Development "mailing list":
http://lists.linaro.org/mailman/listinfo/linaro-toolchain
** Linaro Toolchain IRC channel on irc.freenode.net at @#linaro-tcwg@
* Bug reports should be filed in bugzilla against GCC product:
http://bugs.linaro.org/enter_bug.cgi?product=GCC
* Interested in commercial support? inquire at "Linaro support":
mailto:support@linaro.org
[1]. Source package snapshots are defined when the compiler is only
put through unit-testing and full validation is not performed.
[2]. Stable source package releases are defined as releases where the
full Linaro Toolchain validation plan is executed.
The Linaro Toolchain Working Group (TCWG) is pleased to announce our first
preview-grade ILP32 binary cross-toolchain.
Linaro is supporting AArch64 community effort to introduce ILP32 ABI for
AArch64 Linux, and TCWG will be providing preview-grade ILP32 binary
cross-toolchains alongside our normal release candidates. These toolchains
will be built using community-supported branches for ILP32 ABI of Linux kernel
and Glibc.
This first delivery is based on Linaro GCC 7.1-2017.08-rc1 sources and
available at:
http://snapshots.linaro.org/components/toolchain/binaries/7.1-2017.08-rc1/a…
Contact Linaro
===============
File bugs at http://bugs.linaro.org
For Linaro member support see http://support.linaro.org
For Linaro community support email linaro-toolchain(a)lists.linaro.org
== Progress ==
* Infrastructure:
- patch reviews
* Benchmarking:
- more experiments to reduce noise.
- board reboot + several iterations + use of only 1 core seems to
give manageable results, at the expense of execution time
- old 'deprecated IT blocks' patch benchmarked again with this setup, seems ok
* GCC upstream validation:
- further reduced noise ("random" pass/failures)
- reported a few regressions, looking at improving some testcases
related to branch-cost on arm
* binutils/gdb upstream validation:
- gdbserver build broken on trusty, sent an email to Yao
* GCC
- investigating portability of ubsan to bare-metal targets
* misc (conf-calls, meetings, emails, ....)
== Next ==
* Benchmarking
* GCC upstream validation
* GCC/ubsan
== Progress ==
o Linaro GCC/Validation
* Working on release process
* Reviewed infra patches
* Still some patches pending on upstream reviews
o LLVM
* Familiarizing with LLVM environment
o Misc
* Various meetings and discussions.
* Booked everything for SFO17
== Plan ==
o Backports for 2017.09 snapshot
