Summary:
* Investigate conditional compare.
Details:
1. Expand conditional compare as TRUTH_AND_EXPR/TRUTH_IOR_EXPR for tests.
2. Test tree-level changes for conditional compare.
* Fix/workaround most ICE issues in regression tests.
* Still some fails which expected VRP can optimize the cases.
3. Try to build Coremark and find that conditional compare does block
optimizations, which leads to worse performance.
Plan:
* Investigate VRP and other optimizations to handle conditional compare.
* Raise the propose for upstream discussion.
Planned leaves:
* April 4-8: Chinese Ching Ming Festival and annual leaves.
* April 12: Internal team event.
* April 16-17: Internal training.
Best Regards!
-Zhenqiang
== Progress ==
Started investigating gdb test cases that are failing on
arm-remote gdbserver configuration.
Completed investigation on all timeout gdb test cases failures in
arm-remote gdbserver configuration.
Setup a ubuntu test machine for gdb testing on x86_64 in
remote gdbserver configuration.
Initiated visa process for Ireland and sent requests for required documents
to Arwen.
*** No blue-print available to log work in JIRA.
== Plan ==
Complete investigation of all failure gdb test cases on arm-remote
gdbserver configuration.
Run gdb test suite in x86_64 remote gdbserver configuration and compare
with all other configurations already tested including arm remote to figure
out any similar failures while running test suite remotely on two different
machines.
Book travel to Ireland and complete visa process.
Summary:
* Investigate how to expand conditional compare.
Details:
1. Try to expand conditional compare to RTL
* It seams hard to expand conditional compare to just one cond_exec
insn during expand, since it has to know the cc (GT, LT, etc) set from
previous instruction and tell the later instruction which cc (GT, LT,
etc) it set.
* Try to add new RTL key-word and insn pattern.
2. Follow up Linaro toolchain binaries bug in Yocto build: 1159392,
1161348 and 1161351.
Plan:
* Generate asm for conditional compare.
Planned leaves:
* April 4-8: Chinese Ching Ming Festival and annual leaves.
* April 12: Internal team event.
* April 16-17: Internal training.
Best Regards!
-Zhenqiang
== Progress ==
- Very short work week. I was on leave last Wednesday and Thursday (27th
and 28th).
- Posted patch for gc-section tests for TLS and got related relocs.
- Discussing with Marcus on patch I wrote for gc section tests on PLT
related relocs.
== Plan ==
- Post patch for gc section tests for PLT relocs.
- Complete gc section tests for other generic cases.
- Understand and evaluate gprof support work for Aarch64
== Progress ==
working on http://cards.linaro.org/browse/TCWG-14
- All but 2 test cases are passing and extension elimination for the
simple cases are eliminated
- one of the test failure was due to bug with value range propagation
pass. Have to investigate this further.
- In one instance even though extensions are removed, 1 more instruction
is generated (for crc) - Need to investigate it
- Got the chromebook and Set up Ubuntu; boot strapping gcc now
== Plan ==
- Start with the benchmarking
- investigate the performance and VRP issue
- Also start with http://cards.linaro.org/browse/TCWG-13 in parallel
== Issues ==
* None
== Progress ==
* Libunwind AArch64 support:
- Most of the testsuite is now fine
- but some fixes still needed before upstream submission.
== Plan ==
* Libunwind AArch64 support:
- Fix and submit upstream.
== Progress ==
* Disable-peeling:
- benchmarked locally on snowball. Observed a few regressions in spec2k.
To be analyzed and confirmed with the results from cbuild.
- patched cbuild to work-around a bzr bug which prevented these jobs
from being spawned.
* Libsanitizer: sent patch upstream.
Discussion about interactions with qemu.
* Revert-coalesce: spawned thought-to-be reference jobs for benchmarking.
* Neon intrinsics codegen:
- First analysis of sample codecs seems to indicate that gcc
generates sequences of interdependent instructions where rvct manages
to insert some code in between.
- To be confirmed by dedicated benchmarking, probably in bare-machine mode.
* Neon intrinsics testsuite:
- Added support for polynomial variants (*_p8, *_p16)
- Identified wrong code generated by gcc-linaro-4.7; did not check with trunk.
- Transforming into a dejagnu forms will probably be a lot of work :-(
* Internal activities
== Next ==
* Disable-peeling:
- analyze bench results from cbuild when available
- compare with the results from my snowball
* Libsanitizer:
- resume investigation about isatty problem when ran under qemu.
* Turnoff 64bits ops In Neon:
- backport in linaro-4.8 once the process has been clarified.
* Revert-coalesce:
- check bench results
* Neon intrinsics codegen:
- perform dedicated benchmarking
== Progress ==
* Booked flight for LCE.
* Benchmarked and ran tests on new memcpy implementation.
* Attempted but failed to get new memcpy tested on big endian (still todo).
* Committed new memcpy implementation to cortex strings.
* Passed new memcpy to Android team for bionic.
* Submitted newlib patch for new memcpy.
* Committed binutils ld-elfvsb testsuite fixes, native testsuite now green!
* Further investigation of IFUNC in glibc.
== Issues ==
* Pandaboard ES still a bit flakey, Chromebook hopefully on its way to
replace it.
== Plan ==
* Iron out issues with native binutils make check in cbuild/LAVA.
* Get newlib memcpy patch committed.
* Investigate testing memcpy on big endian (qemu user, models?).
* IFUNC...
--
Will Newton
Toolchain Working Group, Linaro
Progress:
* qemu maintenance
** https://ci.linaro.org/jenkins/job/qemu-ltp/ now shows graphs
of LTP test results for linux-user mode
** rebased qemu-linaro and got it working again (omap3 display
code needed rework after upstream changes)
** investigated why Christoffer Dall's kernels weren't booting:
turns out to be that vexpress now requires CONFIG_REGULATOR
but doesn't force it to be set or set it in the vexpress_defconfig
** rebased/resent/pinged various in-flight patches
* VIRT-4 [Guest migration support for KVM]
** VIRT-49: implement cp15 sync with kernel
*** located my work on this from last year, refreshed my
memory on how far I'd got and what I was planning to do
-- PMM
== Progress ==
* Re-installed the panda buildbot, using USB drive as bot dir
* Reviewing lots of ARM patches (more than usual)
* Trying Arndale again, some errors, some passes, cooler might be
responsible
- Got one internal error, one build error and one pass with Ubuntu kernel
+ patch
- Trying Suse image:
- It has a broken serial driver (makes things much harder)
- sshd does not start by default (in conjunction with serial bug, it's a
killer)
- Now running on a precarious mode, hopefully enough for our needs
* sqlite3 error due to VMUL.f64 while on x86_64 "long double" is f128
- sqlite3 is the best example on what NEVER to do with floating point
values >:|
- Sent patch, working around TILE-Gx issues
== Issues ==
* Still a bit ill, productivity reduced
* Not having a wired network on my desk wastes a LOT of my time
== Plan ==
* Push the sqlite3 patch though
* Continue fixing the 4 remaining broken tests
* Continue with Arndale investigation with Christophe and Zhenqiang
