== 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
* 3 days off
== Progress ==
o Linaro GCC/Validation
* Investigating upstream bugzilla PR81863
* Other patches are still pending on upstream reviews
* Working on release process
o Misc
* Various meetings and discussions.
== Plan ==
o PR81863, ...
== This Week ==
* Type promotion (6/10)
- Benchmarking on ARM and AArch64
- Experimenting with pass order to reduce redundancies
- Preparing the patch to send upstream
* PR78809 (2/10)
- Prototype patch done
- Working through testsuite fallout
* PR78736 (1/10)
- Iteration on upstream feedback. Waiting for approval from Fortran
maintainers for
libgfortran changes
* Misc (1/10)
- Submitted https://review.linaro.org/#/c/21111/
- Meetings
== This Week ==
- Submit patch fo type promotion upstream.
- GNU Cauldron 2017
Status of two weeks.
* Bank holiday on Monday and I am off on Tue and Wed. [6/20]
# Progress #
* TCWG-1159, New design of GDB/GDBserver target description. [4/20]
Post my target description v4 patches. They should be ready to
check in, however, I am sidetracked by GNU Cauldron presentation.
* Cauldron presentation. [5/20]
Write the presentation for my target description work above. Ongoing.
latex+beamer+tikz is quite powerful to make presentation.
* My Linaro Connect SFO17 presentation is accepted.
Need to write it in google doc later.
* Review Alan H.'s patches. [2/20]
* Misc [3/20]
# Plan #
* Finish my Cauldron presentation,
* Commit my target description v4 patches, if time allows,
* Off on Wed, and fly to Prague. Back to office on 14th Sep.
--
Yao Qi
