== Progress ==
* TCWG-180 Debugging - LTO bootstrap failure in Aarch64 with GCC 4.9. (6/10)
Tried to recompile object files that showed differences in GCC trunk
on amd64 machine.It turned out that GCC make system always builds LTO
files in “gcc” directory and uses prev-gcc/xg++ to build them.
No differences when building stage2 and stage3 objects under same
directory “gcc” in FSF trunk.
Doing the same experiment with gcc 4.9 branch shows failure both in
x86_64 and aarch64.
Communicated the issue to Richard Beiner. Got some feedback on
debugging from Honza and Richard.
Tried passing –save-temps to BOOT_CFLAGS using FSF trunk, getting
assembler errors. Need to come back to this problem after finding root
cause.
Read about LTO passes and wpa (partitioned ) vs non portioned mode.
* Others (2/10)
* Upstream patch review.
* 1-1 Meeting Christophe.
* Misc and internal meeting.
* setup LLVM.
* Friday off (2/10).
== Plan ==
* Continue LTO bootstrap issue.
* Benchmark Core mark with LTO.
* Upstream patch review.
== MISC ==
* National holiday on 15th August .
== Progress ==
TCWG-445 - AArch64 does not generate post-decrement stores.
* Issue resolved with Jiong's prologue/epilogue patch committed to trunk.
* Closed the card.
TCWG-291 - Zero/sign extensions (5/10)
* More review and posted patch based on that which was accepted
* Ran full set of validation (including s390x, aarch64 be, x86 and arm)
* Committed two outstanding patches
* Closed the card.
TCWG-413 - Release benchmarking (2/10)
* Benchmarking or release for a15 and a57
TCWG-468: Sha1 regress (2/10)
* Experimented with back-end patterns. Not much improvement for the
test-case.
- Misc (1/10)
* Looked at gcc bugs and closed old ones.
* Posted test-case patch.
== Plan ==
- Sha1 regressions
- Fixing assigned Bugs
== Issue ==
* None.
== Progress ==
* Refine and send the patch to fix pr61225 in Combine pass for review (2/10).
* Send out the ARM backend patch to keep some constant in register
(TCWG-486, 2/10).
* Rebase and test ccmp related patches (TCWG-488, 2/10).
* R/M toolchain related work (4/10).
== Plans ==
* Ping pending patches.
== Planed leaves ==
* Aug. 18 - 26.
* Benchmarks (CARD-716 3/10)
- Working on Linaro's SPEC scripts for LLVM
- Running SPEC2000 INT/FP (C/C++ only) on both ARMv7 and AArch64
- Re-writing some EEMBC scripts to be more stable
- EEMBC reported some regressions from 3.4.2
- But still same when compared with GCC 4.8 (all in Jira)
* Toolchain (CARD-862 3/10)
- Fixing bugs in the assembler/libc++abi
- http://llvm.org/PR20529
- http://llvm.org/PR20025
- Investigating other bugs in the assembler
- http://llvm.org/PR18926
- http://llvm.org/PR20422
* LLVM 3.5 Release (TCWG-476 1/10)
- Building and testing release candidate 2
* Background (3/10)
- Code review, meetings, discussions, etc.
- Buildbot failures
- Plan for 2014 H2
- Basic LLD AArch64 support landed upstream
== Plan ==
* Take actual holidays
* Work on more assembler fixes
* Finish SPEC runs, hopefully test last release candidate
* Have a look at the bots, libraries, CMake, NEON, etc
== Progress ==
* Upstream work (2/10, CARD-341)
- Patch review
- Submitted a fix for armeb-eabi configurations of binutils
- Tested and removed aarch64 lowlevellock.h
- Tidied up glibc patchwork
* Rewrote src-release as a shell script (4/10, TCWG-487)
- Allows building releases as xz
- 80% less evil than existing makefile
* Booting upstream kernel on Chromebook (2/10)
- Kernel configured and built
- I think I have a plan...
* Off Wednesday (2/10)
== Issues ==
* None
== Plan ==
* Upstream kernel on Chromebook
* malloc app benchmarks
* Potentially glibc 2.20 release week
--
Will Newton
Toolchain Working Group, Linaro
== Progress ==
BeagleBoard and Pandaboard setup for gdb testing [1/10]
* Got both alive and working with minimal os
* Trying ubuntu prebuilt binaries didnt work.
Out of office to get internet fixed and buy accessories for boards. [1/10]
Eid Public Holidays in Pakistan from 29th July till 1st August [8/10]
== Plan ==
BeagleBoard and Pandaboard setup
* Get linux running on both boards
* Run gdb test scripts on both boards
* Compare test results outputs with chromebook and x86
Update and Submit Aarch64 record replay patches.
Resume work on Aarch64 prologue analysis.
== Progress ==
GNU Tools Cauldron
* Some useful corridor meetings with various GNU tools developers
and maintainers.
TCWG Sprint [8/10]
* Got to meet the team and discuss TCWG roadmap.
* Some useful howtos specially back porting and patch review howtos.
* Sprint with ARM and useful discussions on gdb patch review.
Return travel from UK on Friday 25th July.[2/10]
== Plan ==
Get over travel fatigue and resume office.
Get missing components and set up pandaboard and beagle board for gdb testing.
Eid Public Holidays in Pakistan from 29th July till 1st August
== Progress ==
* Installed dmucs on the TCWG build slaves, which works in DejaGnu
to do cpu load based scheduling of executing cross tests
remotely. (TCWG 511 - 4/10)
* Spent some time trying to improve SSH performance for cross
testing by opening the SSH connection via expect, and keeping it
open. (TCWG 512 - 2/10)
* Attended GNU Tools Cauldron and Linaro Sprint. (13/10)
* Worked with Bernie on changes to the benchmarking branch.
* Installed a Jenkins instance on my home server which uses my own
build farm for testing Jenkins/Cbuildv2 changes without screwing
up validation. (TCWG 1378 - 1/10)
- Experimented with some new plugins that might be useful.
(TCWG 1378 - 1/10)
- Added command line options to jenkins.sh so it'll work on
different Jenkins installations.
* Fixed bare metal testing for arm*-none-eabi*. (2/10)
* Fixed several Cbuildv2 bugs in bugzilla (TCWG 1378 - 2/10)
- #167 - tcwgweb.sh not accurate.
- #183 - cbuild2 configure --enable-bootstrap sets
'enable_bootstrap' not 'bootstrap'.
- #249 - cbuild2.sh --help only works after configure is run
* Reviewed and approved patches:
- Add configure option to choose compiler languages
- Enable parallelism by default
- Add support for --march
- Add support for --enable and --disable make_docs in configure
and cbuild2.sh
- lib/checkout.sh: Make checkout() dryrun safe when repodir
doesn't yet exist
- lib/stamp.sh: check_stamp() --force and --dryrun should return 1
- cbuild2.sh: Make --dump a do_ option so it's position doesn't
matter
- lib/make.sh: hello_world() will now return 1 if the compilation
or link fails
* Experiment with Docker to see if it has any advantages over a
chroot, which it seems to. (2/10)
* Refactor building binary tarballs. Now it doesn't run the test
first, it assumes the branch has already been validated. (2/10)
* Fix aach64_be-none-elf builds.
== Plan ==
* Fix current breakage in cbuild2/master.
* Get back to SSH performance improvements (TCWG 512).
* Get my D01 board working finally, since I killed my Odroid U2.
* Work through more cbuildv2 bug reports (TCWG 1378).
== Issues ==
* Sorry, several weeks of status in one activity report, I need to
get back to doing these weekly...
== Progress ==
- Travelling from TCWG sprint (2/10)
- Zero/sign extension elimination (TCWG-291) 2/10
* Posted the modified patch and some discussions. Further testing.
-SHA1 regression (TCWG-468) 4/10
* Looked at IRA's uses of back end cost model. It might be a
limitation (See the notes below). Looking at the test-case from sha1
which also has inline asm whose constraints are causing further issues.
- Misc (2/10)
* Looked at bugs assigned (https://bugs.linaro.org/show_bug.cgi?id=85)
* Set-up LLVM
== Plan ==
- Sha1 regressions
- Fixing assigned Bugs
---------------------------------------------------------------------
In AArch64, some of the integer operations support “w” constraint
(FP_REGS). For example *addsi3_aarch64 pattern supports it. However, not
all of the integer operations supports it. In the cases where it is
supported, all the operands have to be in FP_REGS and it will not work
if we have one operand in FP_REGS and other in GENERAL_REGS.
If there is an allocno whose pseudo register is used only in
*addsi3_aarch64 insns, it will have low cost for register class FP_REGS
(as in the case of a28 below exacted from an example). If the other
pseudo register used in *addsi3_aarch64 (a27 in the example below) is
also used in instructions (rorsi3_insn in the exaple below) that does
not support “w” constraint, there is going to be a cost involved in
moving it from FP_REGS to GENERAL_REGS (or other way)
Currently IRA dosent seems to be considering this dependency in
considering this inter dependency in cost calculation.
=Progress=
cbuild2 benchmarking - TCWG-360 [7/10]
* Integrated benchmarking more into the core of cbuild2
* 'Audited' the benchmarks lying around on toolchain64
* Persuaded cbuild2 to use git-over-ssh
Meetings/mail/etc [3/10]
=Plan=
cbuild2 benchmarking
* Convert eembc integration into reviewable patches
* Get cross-compilation working
* Get remote targets working
== This week ==
* Neon intrinsic testing (4/10)
- Patched sources with Christophe's patches
- Ran Neon intrinsic tests for vclz and vqadd
- Investigating regressions
* On leave Monday and Tuesday; out sick Wednesday (6/10)
== Next week ==
* Continued Neon intrinsic testing
== Issues ==
* None.
== Progress ==
* Rework the patch to fix pr61225 in Combine pass. (4/10)
* Investigate code-size regression when skipping arm_split_constant in
expand (TCWG-486, 4/10).
- For reg & 0xffff, zero_extendhi instruction is more efficient.
- For "PLUS", the define_insn_and_split "*arm_addsi3" is only
available when "reload_completed || !arm_eliminable_register
(operands[1])". The cprop and combine passes can not recover it back
when there is no chance to optimize the constant.
* R/M toolchain related work (2/10).
== Plans ==
* Send out the patches for review.
* Refine ccmp related patches.
== Planed leaves ==
* Aug. 18 - 22.
== Progress ==
* Toolchain (CARD-862 2/10)
- Helping debug some sanitizer work
- Re-evaluating compiler-rt on ARM with CMake
* LLVM 3.5 Release (TCWG-476 2/10)
- Working on SPEC to run with LLVM
* Background (6/10)
- Code review, meetings, discussions, patches, etc.
- Email and patch backlog due to Cauldron and sprint
- Investigating and fixing buildbot/build failures
== Plan ==
* Finish SPEC-LLVM integration, run against 3.5 vs. 3.4.2
* Test Release Candidate 2, when it comes
* Back to compiler-rt work...
== Progress ==
* Various small tasks (3/10)
- Catching up on email
- Bug report investigations
- Expenses from Cauldron/Sprint
- Pushing patches
- Tidy some JIRA cards
* Investigated gdb testsuite failures on Chromebook (2/10)
- Looks like a kernel issue, need to try a newer kernel on Chromebook
* Investigated state of ARM and AArch64 glibc testsuites for 2.20 release (2/10)
- Results look ok but a couple of things need investigation at some point
* Triaged bugzilla bugs (1/10)
* Built releases of binutils, eglibc and gdb for 2014.08 (2/10)
== Issues ==
* None
== Plan ==
* Get a newer kernel booting on Chromebook
* Look at improving src-release for xz tarballs
* Figure out what to do with glibc testsuite failures on AArch64
--
Will Newton
Toolchain Working Group, Linaro
Hi guy,
In order to have soft-float support in toolchain, I tried to build our toolchain using Linaro ct-ng script.
I used "linaro-armeb-linux-gnueabihf" configuration then change floating point option from hard to soft.
There is the error I have:
[ERROR] /projects/broadcom-linux/joelz/r/linaro-gcc-build/.build/armeb-linux-gnueabi/build/gcc-core-shared/lib/gcc/armeb-linux-gnueabi/4.8.3/../../../../armeb-linux-gnueabi/bin/ld: error: /projects/broadcom-linux/joelz/r/linaro-gcc-build/.build/armeb-linux-gnueabi/build/gcc-core-shared/lib/gcc/armeb-linux-gnueabi/4.8.3/libgcc.a(bpabi.o) uses VFP register arguments, /projects/broadcom-linux/joelz/r/linaro-gcc-build/.build/armeb-linux-gnueabi/build/build-libc/elf/librtld.map.o does not
For short, libgcc.a(bpabi.o) uses VFP register arguments, but librtld.map.o does not.
The C library used is eglibc version (Linaro 2.19-2014.04), is this a way to make eglibc work with sfot-float?
Thanks!
Joel
I was using arm-eabi builds on Linaro Android 4.9 toolchain 2014.06.
I've just downloaded 2014.07 and found out there is not an arm-eabi
toolchain.
I need arm-eabi to build Linux kernels and arm-none-eabi toolchain from
here:
http://releases.linaro.org/14.07/components/toolchain/binaries/gcc-linaro-a…
is not capable of building LTO kernels.
Error pops up : "cc1: error: -fno-fat-lto-objects are supported only with
linker plugin"
TL;DR, I need arm-eabi builds from Linaro Android toolchains.
arm-none-eabi builds are not built with linker plugin enabled.
Short week (Friday off)
== Progress ==
* GCC trunk cross-validation (2/10)
- catch up with backlog, reported newly introduced FAILs
- analyzed logs of spurious failures, improved reporting of such cases
- the script will know send a separate email with the svn ids
it has selected for validation, to help fill the backports spreadsheet
* Infrastructure (2/10)
- started deployment of past releases to help us quickly
reproduce/investigate bug reports
- 14.* binary releases deployed on toolchain64 (/work/toolchains)
- automation not yet possible because of problem with the lab
internal squid proxy preventing the download of
http://releases.linaro.org/14.07/components/toolchain/binaries for
parsing
- started deployment of past toolchains built from the source
releases using cbuild2 but ran into build problems
* Neon intrinsics tests (1/10)
* Misc (conf calls, meetings) (3/10)
- 1-1 calls to get feedback after Cauldron+Sprint
- a bit of bugzilla triage
- backports reviews for 14.08 release
== Next ==
Holidays, back on Aug 18th
Hi Linaro-toolchain team,
I notice that the Linaro toolchain binary only support hard-float. We have a platform which is ARMv7 based does not support VFP.
Could you generate toolchain binary for ARmv7 that allows soft-float?
Thanks,
Joel
The Linaro Toolchain Working Group (TCWG) announces the 2014.07-1 release
of the Linaro GCC 4.9 source package. This is a respin of the 2014.07
release which
contained a backport of a revision that is only relevant to trunk.
Changes in this GCC source package release are:
* Updates to GCC 4.9.1 (svn212635)
* Revert backport of [AArch32] Fix PR target/61154.
Please find the original 2014.07 release notes below:
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=
GNU Cauldron
TCWG Sprint [8/10]
* Really helpful to meet (almost) everybody
* Some useful discussion, too
memcpy on A15 - TCWG-390 [1/10]
* Should have let this lie but I had an odd 1/2 day and some data
begging to be looked at
* Turned out I'd fat-fingered the wrong data
* But I gained more evidence suggesting that cortex-strings
benchmark is too noisy
(Non-sprint) meetings/mail etc [1/10]
=Plan=
cbuild2 benchmarking
* Fit what I have into Rob's worldview
* Hopefully convert it into some reviewable patches
Follow up on some notes from Cauldron, sprint
== Progress ==
* GNU Cauldron (4/10)
- GCC+LLVM presentation had some positive reviews
- Discussed sanitizers roadmap
- Very interesting meeting with QuIC
* TCWG Sprint (4/10)
- Mostly about GNU tools
- Team Mission streamlined, looking good
- LLVM roadmap attracted some attention
- We could have some bite-sized work from other team members?
* Release 3.5 testing (TCWG-476 2/10)
- No test regressions
- Spotted some benchmark regressions
- ARMv7 is overall the same on EEMBC
- AArch64 is overall 10% faster on EEMBC
* Weekend working, Friday off
== Plan ==
* Release week!
- Investigate 3.5 performance regressions on v7
- Work around the lack of perf on v8?
- Run SPEC on both v7 and v8 and spot regressions
== Progress ==
* Attend GNU Cauldron.
* TCWG Sprint (8/10)
- Participated in Discussions about TCWG/GNU tools.
- Partcipated in Discussions with ARM mainatiners.
- Discussed about Connect plans.
- LLVM status.
- Attend Backport Demo by Yvan / some Bug fix Activity.
* Friday off traveling back home (2/10)
== Plan ==
* Continue LTO bootstrap issue
* Benchmark Core mark with LTO
* Upstream patch review.
== Issues ==
* Large Memory Model put on hold now.
* Waiting on ARM on Aarch64 SYS V ABI.
== This week ==
* TCWG Sprint (8/10)
- Validation process greatly clarified including roadmap
* Launchpad 1318831 - Invalid unpoisoning of stack redzones on ARM (2/10)
- Finished validating and working thru git review isses with Launchpad
== Next week ==
* Begin neon intrinsic testing
* I will be off on Monday and Tuesday
