== Progress ==
* Annual leave Monday to Wednesday (6/10)
* Travel to Cauldron/Sprint (2/10)
* Catching up on email, pushing patches, bugs etc. (2/10)
== Issues ==
* None
== Plan ==
* GNU Tools Cauldron
* Toolchain Sprint
--
Will Newton
Toolchain Working Group, Linaro
The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2014.07
stable release of the Linaro GCC 4.9 source package.
Linaro GCC 4.9 2014.07 is the fourth Linaro GCC source package release in the
4.9 series. It is based on FSF GCC 4.9.1+svn212419 and includes performance
improvements and bug fixes.
With the imminent release of ARMv8 hardware and the recent release of the
GCC 4.9 compiler the Linaro TCWG will be focusing on stabilization and
performance of the compiler as the FSF GCC compiler approaches version 4.9.1.
The Linaro TCWG will provide monthly stable[1] source package releases until
FSF GCC 4.9.1 is released. At that point Linaro GCC 4.9 will merge in
FSF GCC 4.9.1 and, release Linaro GCC 4.9.1, and then return to a schedule of
stable quarterly releases and monthly engineering[2] releases.
Interesting changes in this GCC source package release include:
* Updates to GCC 4.9.1-pre+svn212419
* Backport of [AArch32] Wrap long literals in HOST_WIDE_INT_C in
aarch-common.c
* Backport of [AArch32] Rewrite TLC Intrinsics.
* Backport of [AArch32] Remove vzip, vuzp, vtrn builtins and cleanup
* Backport of [AArch32] Use enum name instead of integer value for
PARAM_SCHED_PRESSURE_ALGORITHM.
* Backport of [AArch32] Vectorise bswap*
* Backport of [AArch32] Fix PR/61331
* Backport of [AArch32] Fix PR target/61154
* Backport of [AArch32] Use mov_imm type for movw operations consistently
* Backport of [AArch32] Remove XFmode from ARM backend.
* Backport of [AArch64] Rewrite REV Intrinsics.
* Backport of [AArch64] Implement HARD_REGNO_CALLER_SAVE_MODE.
* Backport of [AArch64] Support tail indirect function call.
* Backport of [AArch64] Fix stack protector for ILP32
* Backport of [AArch64] ILP32 dynamic linker
* Backport of [AArch64] Correct signedness of builtins, remove casts from
arm_neon.h
* Backport of [AArch64] clarify stack layout diagram
* Backport of [AArch64] Implement movmem for the benefit of inline memcpy
* Backport of [AArch64] Fix REG_CFA_RESTORE mode.
* Backport of [AArch64] Fix layout of frame layout code.
* Backport of [AArch64] Fix some reg-to-reg move scheduler types.
* Backport of [AArch64] Implement CRC32 ACLE intrinsics + testsuite.
* Backport of [AArch64] Implement ADD in vector registers for 32-bit scalar
values.
* Backport of [AArch32/AArch64] TARGET_ATOMIC_ASSIGN_EXPAND_FENV AArch64
* Backport of [AArch32/AArch64] Use signed chars in gcc.dg/pr60114.c.
* Backport of [AArch32/AArch64] Rewrite UZP Intrinsics.
* Backport of [AArch32/AArch64] Rewrite TRN Intrinsics.
* Backport of [AArch32/AArch64] Rewrite EXT Intrinsics.
* Backport of [genattrtab] Fix memory corruption, allocate enough memory for all
bypassed reservations
* Backport of Fix PR c/60114
Feedback and Support
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 Launchpad against "Linaro GCC project":
http://bugs.launchpad.net/gcc-linaro/+filebug.
* Questions? "ask Linaro":
http://ask.linaro.org/.
* Interested in commercial support? inquire at "Linaro support":mailto:
support(a)linaro.org
[1] Stable source package releases are defined as releases where the full Linaro
Toolchain validation plan is executed.
[2] Engineering source package releases are defined as releases where the
compiler is only put through unit-testing and full validation is not
performed.
== Progress ==
* More work on launchpad bugs (3/10)
- Moved gdb bugs over to bugzilla and closed down Launchpad tracker
- Found secret location of Linaro eglibc bugs in Launchpad!
- Triaged, moved, closed as many bugs as possible, some still remain
* Respin of binutils 2.24 2014.07 release (1/10)
* Get binutils ARM testsuite all passing on EABI, mostly on OABI (2/10)
* glibc patch review and build warning fixes (2/10, CARD-341)
* Annual leave on Friday (2/10)
== Issues ==
* None
== Plan ==
* 4 days in Berlin
* Travel to Cauldron
--
Will Newton
Toolchain Working Group, Linaro
Hello Will and list,
do you have a prepackaged static libfdt.a for aarch64?
I think it's part of some of the released images you provide, but
maybe you have it also available as a single package?
Thank you,
Claudio
== Week of July 7th ==
- Continued working on toolchain testing improvements (CARD-1378, 6/10)
-- Further Jenkins fixes and improvements
-- Various bits of build farm administration
-- Investigated feasibility of [really] remote cross-testing -- yes, it is feasible!
- STREAM performance regression (TCWG-388, 2/10)
-- Resumed patch submission (now that testing is working much better)
- Various meetings and discussions (2/10)
--
Maxim Kuvyrkov
www.linaro.org
== Week of June 30th ==
- Continued working on toolchain testing improvements (CARD-1378, 6/10)
-- Troubleshooted Jenkins jobs
-- Various cbuild2 improvements
- Migrated master VM of TCWG dev environment to AWS (2/10)
-- It is now at tcwg-dev-env-master.linaro.org
- Various meetings and discussions (2/10)
-- Attempted to test QEMU's aarch32 crypto support
-- Organized travel for GCC GSoC student to GNU Tools Cauldron. Thanks Linaro for providing sponsorship for this!
--
Maxim Kuvyrkov
www.linaro.org
=Progress=
memcpy regression on A9 - TCWG-390 [6/10]
* Not down to the branch predictor after all
* Can be fixed for A9 with explicit pld, but this isn't free
cbuild2 benchmarking - TCWG-360 [1/10]
* Dug out my branch, merged in trunk, refreshed memory
Meetings/mail/etc [3/10]
* Including a little patch review for Roland's lowlevellock.h (TCWG-435)
=Plan=
Close TCWG-390 as wontfix
Lots more cbuild2 benchmark automation
Keep up with lowlevellock.h
== Progress ==
* Recovered from flu on leave 7th and 8th July (4/10)
=LTO bootstrap -tcwg180 (2/10)=
Git bisect experiments shows bootstrap compare errors apprearing and
disappearing at trunk at different revisons.
Alteast 3 revisons LTO bootstrap passes
r210740 2488876068f541a341472c3aeedadccc255f0696 PASS
r210854 271fe9cf111f6b581451bbfb4d346757877896cd PASS
r210973 487fea840105dbb0ff516b797e7d86bea82ef74a PASS
It is hard to do backport of revisons which fixes this bug. Need to
discuss with LTO people in GCC mailing list
=Reload spill fix -tcwg180 (2/10)=
Emailed my status on benchmarking
https://gcc.gnu.org/ml/gcc-patches/2014-07/msg00450.html
This bug cannot be fixed without performance degradation. So if it
cannot be up streamed, the reporter can use the patch to build his
package atleast. Planning to close this bug if I did not receive any
comments from maintainers.
=Misc (2/10)=
* GCC internal team meeting
* Meeting with Ryan
== Plan ==
* Benchmark coremark -O3 vs -O3 -flto.
* Email to marcus on ABI for large memory model in Aarch64.
* Cauldron preparation.
== Planed leaves ==
* Jul 18- 25: Travel to Cambridge.
== Progress ==
- 8th and 9th on holiday (4/10)
- Zero/sign extension elimination (TCWG-291) 3/10
* Patch one is accepted
* Posted the modified patch 2 after some discussions
* Started analysing the code generated for coremark and spec2k
* Looks there are more places that can be improved. I will post
additional patches after completing it
- Launchpad bugs (3/10)
* https://bugs.launchpad.net/gcc-linaro/+bug/1320965
* https://bugs.launchpad.net/gcc-linaro/+bug/1331112
== Plan ==
- sha1 regressions
- 15th and 16th on holiday
== Progress ==
* One day off.
* Test and send out the local NLS patch for community review (1/10).
* Test ccmp patches. Can not reproduce a FAIL in previous regression
test with the latest trunk(TCWG-488, 1/10).
* Test codes to skip arm_split_constant (TCWG-486, 3/10). Performance
results seam OK for spec2000, coremark dhystone and eembc.
* R/M toolchain related work (3/10).
== Plans ==
* Ping pending patches.
* Update ccmp patches.
== Planed leaves ==
* Jul. 15 - 25: Travel to Cambridge.
* Aug. 4 -8: Annual leaves.
== This week ==
Provide ldp/stp peephole optimization for Aarch64 [TCWG-446] [0/10]
- Halted development due to duplicate ARM development project by
Bin Cheng
Launchpad 1318831 - Invalid unpoisoning of stack redzones on ARM [3/10]
- Verifying test results
Launchpad 1267761 - miscompilation of unsigned comparison on aarch64 [2/10]
- Testing under way on Jenkins
Neon intrinsic tests [4/10]
- background work to gain familiarity with effort
Misc Meetings [1/10]
== Next week ==
- Verify testing on Launchpad 1267761 and 1318831
- Begin investigating compiler bugs discovered by neon intrinsic tests
== Future ==
== Progress ==
* GCC trunk cross-validation
- reported a few regressions
* Automation Framework (2/10)
- looked at Jenkins configuration & logs of some failures
* AArch64 libsanitizer (1/10)
- tried to use cbuild2 in the lab to build & test on HW, but all my
build attempts failed for various reasons
* Neon intrinsics tests (3/10)
- feedback from upstream requests some renaming changes + GNU coding
style fixes
- since reformating the existing testsuite is a manual and
error-prone task, it will bring additional delay in improving GCC
testsuite.
- it's probably more efficient to run the existing tests regularly
and start reporting & fixing the bugs identified, not waiting for the
full conversion
- updated the existing tests for fp16 and poly* types support with
GCC (reference built with armcc)
- interestingly, compiling the original testcases with armcc for
aarch64 caused ICE on 28 source files.
* Misc (meetings, conf-calls, ....) (4/10)
== Next ==
Holidays for 2 weeks
== Progress ==
* Monday holiday
* Automation Framework (CARD-1378 6/8)
- TCWG D01 moved in, Chromebooks out
- Movng LLVM buildbots to D01s
- D01s have no NEON support... :S
- We might have to move some Chromes back in
- Moving hackboxes to Chromebook 2s
* Background (2/8)
- Code review, meetings, discussions, etc.
== Plan ==
* Deal with NEON issue in the rack
* Finish Cauldron presentation
* Try to get the D01s as buildbots, even without NEON
== Progress ==
* AArch64 GDB reverse watchpoints issue. [TCWG-503] [4/10]
-- Found a new fix in generic process record implementation.
Testing stalled by too many 2500 failures seen on arm-linux-gdb in
general and some 850 record/replay implementation.
* AArch64 GDB handling of functions with empty prologue. [TCWG-504] [4/10]
-- Analysis of prologue generated by aarch64-gcc
-- Make an understanding of code implementation for arm-linux-gdb.
-- Try to reproduce reported bugs.
* Testing and Analysis of testsuite failures in arm-linux-gdb [TCWG-509] [1/10]
* Browsing gdb related upstream discussions. [1/10]
== Plan ==
* AArch64 GDB reverse watchpoints issue. [TCWG-503]
-- Test and submit fix for target record for the case where we cant
step breakpoints.
* Investigate issues in arm-linux-gdb testsuite results. [TCWG-509]
* Travel preparations to UK for Tools cauldron and TCWG sprint.
-- Obtain health certificate for international travelers.
* On Holiday from 14th to 17th July 2014.
=Progress=
memcpy regression on A9 - TCWG-390 [7/10]
* Tweaked bench.py some more
* Cobbled together a bare metal version of cortex-strings benchmark
* Was surprised to find that the problem does not relate to Linux
* Have some evidence that points at the branch predictor
Meetings/mail/etc [3/10]
=Plan=
See if A9 performance is recoverable without sacrificing other targets
Push some of my improvements into the cortex-strings repo
Possibly write up my cortex-strings-benchmarking-in-lava method
Back to cbuild benchmark automation
== Progress ==
Zero/sign extension elimination (TCWG-291) 10/10
- Patch updated based on review comments.
- Regression tested with standard set-up
- Created test-cases.
- Set-up additional architectures for validation
* aarch64-none-elf --with-abi=ilp32 (Foundation model)
* aarch64-none-linux-gnu --with-abi=ilp32 seems to be broken.
* Set-up qemu based s390x-ibm-linux
* Tried x86_64-linux -mx32 but ran into many issues.
- Patch now waiting for s390x-ibm-linux. All others are OK.
- will post once the results are available
== Plan ==.
- Spec2k regressions
- sha1 regressions
- 8th and 9th on holiday.
== This week ==
Provide ldp/stp peephole optimization for Aarch64 [TCWG-446] [6/10]
- Investigated options for improving ldp/stp pairing and developed
patch
- Testing underway
Launchpad 1267761 - miscompilation of unsigned comparison on aarch64 [1/10]
- Backported revision 206529 from trunk
- Testing under way on Jenkins
Launchpad 1296942 - marked fixed released based on backport by Yvan Roux
[1/10]
- July 4th holiday [2/10]
== Next week ==
Complete testing on Launchpad 1267761 and TCWG-446 and initiate code review
== Future ==
Travel to Cambridge on July 11th for Cauldron and TCWG Spring
Am 05.07.2014 17:36, schrieb Emilio Pozuelo Monfort:
> Control: reassign -1 gcc4.8,gcc4.9
>
> Hi,
>
> This is still a problem with GCC 4.9. Is there any progress on this? This is
> making aegisub FTBFS on armel, blocking the libass transition.
afaik, no. See also https://gcc.gnu.org/ml/gcc/2014-07/msg00000.html
== Progress ==
* Toolchain (CARD-862 2/9)
- Investigating LLD, MCLinker
* Automation Framework (CARD-1378 4/9)
- Lots of validation and lab meetings
- Planning and designing a new rack:
- Replace all chromebooks with D01s
* Background (3/9)
- Code review, meetings, discussions, etc.
- A bit more on Cauldron's presentation
- Revamping LLVM plan, TCWG mission, Validation docs
* Some illness...
== Plan ==
More rack stuff... Monday holiday.
== Progress ==
* Patch review, testing and follow-up (3/10, CARD-341)
- glibc 2.20 freeze still not announced
- submit more warning fix patches
- reviewed series of gdb thumb prologue patches
* Get postgresql malloc benchmark using unix domain sockets (2/10, TCWG-441)
* Built releases of eglibc and binutils for 2014.07 (3/10)
* Started looking at moving binutils and gdb bugs in launchpad to
bugzilla (1/10)
* Other small things (1/10)
- Investigated a couple of other small issues for various people
- Meetings
== Issues ==
* None
== Plan ==
* Clear up more old bugs and move to bugzilla/JIRA/upstream
* malloc benchmarking
* glibc patches
--
Will Newton
Toolchain Working Group, Linaro
The Linaro Toolchain Working Group is pleased to announce the 2014.06
release of Linaro GCC 4.7.
As announced at Linaro Connect USA 2013 Linaro GCC moved to a pattern
of quarterly stable releases, with engineering releases in the
intervening months. This is the third stable release, and contains no
known regressions compared to the 2014.04 release.
Linaro GCC 4.7 2014.06 is the twenty forth release in the 4.7 series.
Based off the latest GCC 4.7.5+svn211571 release, this is the eleventh
release after entering maintenance and the final one.
Interesting changes include:
* Updates to GCC 4.7.4+svn211571
Feedback and Support
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 Launchpad against "Linaro GCC
project":http://bugs.launchpad.net/gcc-linaro/+filebug.
* Questions? "ask Linaro":http://ask.linaro.org/.
* Interested in commercial support? inquire at "Linaro
support":mailto:support@linaro.org
