Hi Ramana, Ulrich. Could I have some help with an unexpected
testsuite failure while backporting Carrot's adddi patch?
testsuite/gcc.misc-tests/gcov-7.c builds and runs but aborts during
leave() due to unexpected results.
The merge request is here:
https://code.launchpad.net/~michaelh1/gcc-linaro/core-adddi/+merge/113111
The testsuite diff is here:
http://ex.seabright.co.nz/build/gcc-linaro-4.7+bzr115001~michaelh1~core-add…
The build tree is at:
cbuild@tcpanda02.v:/scratch/cbuild/slave/slaves/tcpanda02/gcc-linaro-4.7+bzr115001~michaelh1~core-adddi/gcc/default/build
The failing and working versions are on tcpanda02 as ~/gcov-7.exe and
~/gcov-7-ok.
Here's the details:
* The test is fine when built from the command line
* The test is fine on the hard float Precise build
* The failing binary works fine when run on Precise
* The disassembled body (not libraries) is identical modulo changes
in addresses
* The fault goes away with a static linking via adding "--tool_opts '-static'"
* The fault persists with binutils 2.22
* The fault persists with the eglibc 2.15 loader
I assume the testsuite picks up a different libgcc and libgcov somehow
which gives a different executable. It's strange that the static
linked version is fine, and that the failing binary works fine on a
different host.
Could you have a poke in the build tree?
-- Michael
== GCC ==
* Tom de Vries fixed root cause of LP bug 1020601 (missed
optimization with multiple __builtin_unreachable calls)
on mainline. Backported to Linaro GCC 4.7 and tested.
Fixed bug exposed by backport (latent in mainline).
* Continued investigation of reload bug reported by ARM.
== Misc ==
* Attended GNU Tools Cauldron in Prague. Presented on
GDB remote/native feature parity work.
Mit freundlichen Gruessen / Best Regards
Ulrich Weigand
--
Dr. Ulrich Weigand | Phone: +49-7031/16-3727
STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E.
IBM Deutschland Research & Development GmbH
Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk
Wittkopp
Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht
Stuttgart, HRB 243294
Current Milestones:
|| || Planned || Estimate || Actual ||
||cp15-rework || 2012-01-06 || 2012-06-23 || 2012-06-24 ||
||a15-lpae-support || 2012-07-13 || 2012-07-20 || ||
||clean-up-kvm-patches || || || ||
||track-kvm-abi-changes || || || ||
||fake-trustzone || || || ||
Overall KVM plan for 'do by end August': QEMU parts of this are a mix
of clean-up-kvm-patches and track-kvm-abi-changes blueprints, mostly.
http://cards.linaro.org/browse/CARD-167
== a15-lpae-support ==
* LPAE patchset in latest target-arm pullreq sent upstream
* Kernel patch to get it not to throw away high bits of RAM
size Acked by Will and sent to RMK's patch system
* vexpress patchset for large RAM sizes had a few review
issues which I think I've sorted; need to roll a v2
* push back estimate date a week to account for: large-ram-size
work wasn't in my original list of work here; code review wait
times [ie not much real work remaining, but some time delay]
== other ==
* updated to new fast model and kernel and rechecked that my local
setup still works OK
* qemu-linaro 2012.07 released
* usual upstream patch review
* finally bit the bullet and upgraded my ancient Ubuntu desktop
KVM blueprint progress tracker:
http://apus.seabright.co.nz/helpers/backlog?group_by=topic&colour_by=state&…
The Linaro Toolchain Working Group is pleased to announce the 2012.07
release of both Linaro GCC 4.7 and Linaro GCC 4.6.
Linaro GCC 4.7 2012.07 is the fourth release in the 4.7 series. Based
off the latest GCC 4.7.0+svn189098 release, it includes performance
improvements around choice of auto-increment based addressing modes
for floating point values.
Interesting changes include:
Updates to GCC 4.7.0+svn189098
Implements improvements to ivopts selection of addressing modes of
floating point values.
Fixes:
LP: #1010826 - Invalid unaligned loads in vectorized code.
Linaro GCC 4.6 2012.07 is the seventeenth release in the 4.6 series.
Based off the latest GCC 4.6.3+svn189058 release, this is the fourth
release after entering maintenance.
Interesting changes include:
Updates to 4.6.3+svn189058
Fixes:
LP: #1010826 - Invalid unaligned loads in vectorized code. LP:
#1013209 - Internal compiler error when building neon intrinsics.
The source tarballs are available from:
https://launchpad.net/gcc-linaro/+milestone/4.7-2012.07https://launchpad.net/gcc-linaro/+milestone/4.6-2012.07
Downloads are available from the Linaro GCC page on Launchpad:
https://launchpad.net/gcc-linaro
More information on the features and issues are available from the release page:
https://launchpad.net/gcc-linaro/4.7/4.7-2012.07https://launchpad.net/gcc-linaro/4.6/4.6-2012.07
Mailing list: http://lists.linaro.org/mailman/listinfo/linaro-toolchain
Bugs: https://bugs.launchpad.net/gcc-linaro/
Questions? https://ask.linaro.org/
Interested in commercial support? Inquire at support(a)linaro.org
The Linaro Toolchain Working Group is pleased to announce the release of
Linaro QEMU 2012.07.
Linaro QEMU 2012.07 is the latest monthly release of qemu-linaro. Based
off upstream (trunk) QEMU, it includes a number of ARM-focused bug fixes
and enhancements.
There are no major changes in this month's release, though
it has been updated to track the latest upstream QEMU changes.
Known issues:
- Graphics do not work for OMAP3 based models (beagle, overo)
with 11.10 Linaro images.
- Audio may not work on Versatile Express models with the latest
Linaro kernel/hardware packs (LP:977610).
The source tarball is available at:
https://launchpad.net/qemu-linaro/+milestone/2012.07
More information on Linaro QEMU is available at:
https://launchpad.net/qemu-linaro
== GCC ==
* Investigated bootstrap comparison failure with neon-shifts
branch; tracked down root cause to pre-existing bug in GCC
common code. Fix checked in to FSF mainline and 4.7 branch.
* Investigated di-sync-multithread test case failure with
neon-shifts branch; root cause was missing length attributes
for sync.md insn&split patterns. Implemented fix and
restarted tests.
* Investigated LP bug 1020601, missed optimization with multiple
__builtin_unreachable calls. Tracked down root cause and
started discussion of possible fixes on gcc-patches.
* Investigated potential reload bug reported by ARM.
Mit freundlichen Gruessen / Best Regards
Ulrich Weigand
--
Dr. Ulrich Weigand | Phone: +49-7031/16-3727
STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E.
IBM Deutschland Research & Development GmbH
Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk
Wittkopp
Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht
Stuttgart, HRB 243294
RAG
Amber: 4.7 2012.07 source release for reasons described below.
Green : 4.6 2012.07 source release done.
== Progress ==
* Worked on auto-inc-dec scheduler changes.First cut patch looking reasonable.
* Committed the neon permute intrinsics upstream.
* Release week : release tarballs prepared for 4.6 . The 4.6 release
is GREEN. I will upload the release on Thursday morning after I am
back in the office.
The 4.7 release had some issues - I had to rerun the release script
because the merge contained some artifacts which were a result of
merge conflicts. Having respun the release it turned out that the
rsync from my machine to cbuild failed, which meant that I ended up
testing the same snapshot twice.Given that the 2 tarballs only differ
in the .rej and the .orig files and nothing more I'm not too worried
about this because it should ideally just work. The good news is that
ubutest and everything else went through ok. The bad news is that the
oe build appears to be borked. We need to investigate that further.
Having looked inside the tarballs and seen that the .rej and .orig
files were the only things different between the 2 tarballs I don't
think it's a huge problem for the release. I;ve spawned off another
set of builds to be absolutely sure .
* Looked at neon costs and vdup improvements . The neon cost changes
could cause regressions with 64 bit arithmetic and hence need to be
looked at carefully. The vdup improvements cause carnage in
gcc.target/arm/neon and tests for intrinsics have to be improved.
== Plans ==
* GNU Tools cauldron next week.
* Deal with release week fall-out.
* Write a patch to check md5sums between local tarball and uploaded
tarball in the release script.
* Look at auto-inc-dec patches more.
* Background look into improving some of the tests that now fail with
the vdup patches.
== Absences ==
* 8th - 11th July - GNU Tools Cauldron.
* 17th Sept - 5th Oct - Vacation planned, yet to be approved.
Current Milestones:
|| || Planned || Estimate || Actual ||
||cp15-rework || 2012-01-06 || 2012-06-23 || 2012-06-24 ||
||a15-lpae-support || 2012-07-13 || 2012-07-13 || ||
||clean-up-kvm-patches || || || ||
||track-kvm-abi-changes || || || ||
||fake-trustzone || || || ||
Overall KVM plan for 'do by end August': QEMU parts of this are a mix
of clean-up-kvm-patches and track-kvm-abi-changes blueprints, mostly.
http://cards.linaro.org/browse/CARD-167
== a15-lpae-support ==
* did the basic benchmarking of the LPAE series; using 64 bits for
guest physical addresses has between 0 and 0.5% hit to performance,
which IMHO is sufficiently minimal that it is not a problem.
* wrote a set of follow-up patches which allow the vexpress-a15
model to accept large RAM sizes (mostly turning off the "too big"
user-error message, fixing some over-small types in the QEMU boot
loader and adding support for handling device tree blobs with
64 bit address/size fields).
* discovered that Linux will happily throw away the top 32 bits
of a device tree memory node's size field. Wrote a patch for this,
which works but needs redoing to fix in a cleaner way.
== other ==
* qemu-linaro 2012.07 release prep: bug triage, investigation,
rolling tarball, testing
* arm-devs pullreq
KVM blueprint progress tracker:
http://apus.seabright.co.nz/helpers/backlog?group_by=topic&colour_by=state&…
-- PMM
