== Progress ==
* LLD Port:
- Got hello world running.
-- Needed a horrible hack to make lld output PLT and GOT entries for
unresolved weak references with default visibility.
- Wrote up in Jira the major areas of work that would be needed for a
useful port.
- Started putting in changes cleanly and writing tests for them.
- Currently hitting a few problems with llvm-mc. I can't generate the
relocations I need to test the linker. The hello world test case used
mainly GCC library objects.
-- Most serious is not emitting R_ARM_BASE_PREL for .word
_GLOBAL_OFFSET_TABLE - (label+8)
== Plan ==
* On holiday Monday and Tuesday
* LLVM MC
See how easy it would be to add missing features to llvm-mc as it
would allow me to write more tests.
* LLD
Complete the test cases for the code I've added.
Take stock of where the lld port is and decide where to go from there.
Options are:
- Send an RFC upstream with what I have. It is not sufficient to run
hello world but should be relatively uncontroversial.
- Cleanly implement the emit the unresolved weak references in the PLT
and GOT so hello world will work out of the box on ARM.
- Keep going until I've got Thumb2 support so I don't have to use ARM
only static libraries to make hello world working.
There is obviously a trade off between having a useful linker and the
patch size getting out of hand.
== Progress==
* Remove exit-on-error flag from CodeGen tests [TCWG-604] [5/10]
- This is a follow-up of TCWG-592: when changing the diag handler,
some of the tests started to fail, so we had to add an exit-on-error
flag to preserve the old behaviour until we can fix the tests.
- Last week's patch fixing the MIR tests (PR27770) - still in upstream review
- Last week's patch fixing an AMDGPU test (PR27762) - committed upstream
- Last week's patch fixing a BPF test (PR27766) - committed upstream
- Submitted another patch fixing a BPF test (PR27767) - committed upstream
- Submitted another patch fixing two other BPF tests (PR27768/9) -
in upstream review
- Investigating one of the AMDGPU tests (PR27761)
* Use git worktree in llvm helper scripts [TCWG-587] [4/10]
- Started a RFC and a wiki page about the new workflow [1]
- People seem to be in favour of it, but there are still some TODOs
left before we can merge
* Misc [1/10]
- Meetings, buildbots
== Plan ==
* Remove exit-on-error flag from CodeGen tests [TCWG-604]
- Submit a patch for the AMDGPU test (PR27761)
- More investigations on the ARM test (PR27765)
* Use git worktree in llvm helper scripts [TCWG-587]
- Finish the final touches and have a proper review
[1] https://collaborate.linaro.org/display/LLVM/Git+Worktree+Proposal
== Progress ==
* Validation
- cleanup
- Fixed regressions in abe (gcc_update, make install, gdb timestamps)
- updated abe stable branch (now matches master)
- various Jenkins jobs updates, prepared support for gcc-6 based toolchains
- compared results of armv8l vs arm toolchains: few, expected
differences due to different default tuning
* GCC
- regressions reports on trunk
* Misc (conf-calls, meetings, emails, ....)
== Next ==
* Validation
- actually update the Backport job
- prepare switch to docker for buildfarm job
- cleanup
* Backports
* GCC
- trunk monitoring
- more on AdvSIMD intrinsics
Sorry for hitting the wrong mailing list. OK I will check with HTTP instead of HTTPS. Thanks for your time & help.
On May 25, 2016 11:02 PM, Jim Wilson <jim.wilson(a)linaro.org> wrote:
On Wed, May 25, 2016 at 8:09 AM, Gujulan Elango, Hari Prasath (H.)
<hgujulan(a)visteon.com> wrote:
> I enabled the -v option of wget and I am able to see the download starts and
> fails randomly after progressing to some extent i.e. 10% or 27%. The
> connection is reset by peer and wget exits. I tried increasing the timeout
> option of wget as well.
This is some kind of networking or web server problem. We only know
how to fix compiler problems here on the linaro-toolchain list. I did
confirm that I can download the file OK, both via wget and via
chrome.. I noticed that the https support on releases.linaro.org is
not working, and I had to use http instead, but it isn't clear if that
is related to your problem.
Jim
Hello,
We have cloned the meta-linaro layer and when we build,we are facing some issues when the do_fetch() task is executing for the gcc-source-linaro-5.1 package.
I enabled the -v option of wget and I am able to see the download starts and fails randomly after progressing to some extent i.e. 10% or 27%. The connection is reset by peer and wget exits. I tried increasing the timeout option of wget as well.
Any idea what's wrong. Find attached the log of the error.
Thanks & Regards,
Hari Prasath
Cisco is trying to use clang/lto on big-endian arm, which apparently
requires gold, and gold does not support the --be8 option which is
required for ARMv7 big-endian support. Does anyone here care about
this?
Umesh Kalappa asked about this on the binutils mailing list
https://sourceware.org/ml/binutils/2016-05/msg00209.html
and discovered that it is a known bug reported 5 years ago
https://sourceware.org/bugzilla/show_bug.cgi?id=13213
Jim
== Progress ==
o Extended validation (7/10)
* Investigate GDB instabilities:
- branch tracing issue are due to builder feature support
- Our 2 old builders, which don't support it, removed from x86
validation pool
* Benchmarking:
- Looked at Lava instance API and lava-tool usage and prerequisite
- Implementing comparison script
o Misc (3/10)
* Various meetings and discussions.
== Plan ==
o Continue on validation/benchmarking
o Catch up with upstream work.
=== This Week ===
Support for watchpoint un-alligned watchpoint addresses on LLDB
AArch64 [TCWG-367] [3/10]
-- Made changes to NativeRegisterContext_arm64 to support multiple
watchpoint slot for a single watch address.
-- Enabled unaligned watchpoints and experimented with resulting false
positives.
LLDB Chromebook Test Stability [TCWG-563] [3/10]
-- Migrated local builder to Ubuntu 16.04 xenial
-- Ran LLDB testsuite with GCC 5.x.x on chromebook, raspberryPI2
-- Updated LLDB testsuite makefile.rulez to use correct cross AR and OBJCOPY
LLDB buildbot updates and maintenance [TCWG-241] [2/10]
-- Investigation of LLDB buildbot slave failure
-- Implemented stale log deletion mechanism by making sure we keep
only 10 most recent logs.
LLDB upstream collaboration and Arm/AArch64 Linux port maintenance [1/10]
-- Verify patches under review
-- Analyzed TestTopLevelExprs on LLDB arm failure and committed xfail.
Miscellaneous [1/10]
-- Meetings, emails, discussions etc.
-- Travel bookings for connect and TCWG sprint.
=== Next Week ===
Close out TCWG-231 (LLDB bring up and bug fixing on HiKey 96Board)
-- Run and comparison of AArch64 LLDB test results vs hikey showing
less than 5% difference.
Close out LLDB Chromebook Test Stability [TCWG-563]
-- Make sure there are no failures for which we dont know the underlying reason.
-- Report remaining bugs and commit xfails upstream.
Support for watchpoint un-alligned watchpoint addresses on LLDB
AArch64 [TCWG-367]
-- Further testing of false positive results due to allowing
un-alligned watch-points.
LLDB buildbot updates and maintenance [TCWG-241]
-- Figure out difference of test results between local and remote chromebooks.
-- Figure out a way to hide unused test slots by buildbot factory.
Miscellaneous
-- Migrate laptop to ubuntu 16.04 in hope of better driver support.
-- Portugal visa and travel booking
== Progress ==
* Validation
- cleanup
- reviews
- asserting ABE master vs stable results
- stopped investigation on a huge number of unexpected
regressions, maybe caused by builders crashes
- created a Jenkins job able to detect the base GCC
branch, in order to select the right libc/binutils version
- found why ABE master showed regressions with the
_Pragma3 GCC test. Fix under review.
- investigating recent, numerous build failures
* Backports
- updated backport to fix bug #2185 after Kugan analysis
- drafted a script to parse the spreadsheet and generate
the backflip commands as appropriate
* GCC
- reported a couple of regressions on trunk
- Neon intrinsics tests update: committed.
We are now ready to remove neon-testgen.ml
== Next ==
* Validation
- cleanup
- armv8l vs arm
- ABE master vs stable
* GCC
- trunk monitoring
- more on AdvSIMD intrinsics
== Progress ==
PR40921 -missed optimization: x + (-y * z * z) => x - y * z * z
- Patch committed
PR63586 - x+x+x+x -> 4*x in gimple
- Patch committed
- There were couple of fallouts
PR71179 - ICE fold_convert_loc, at fold-const.c:2360
- Patch committed
PR71170 - ICE in rewrite_expr_tree, at tree-ssa-reassoc.c:3898
- Tried various options to fix this and settled on an implementation
- Patch sent for upstream review
== Plan ==
Follow upon remaining upstream patches
IPA VRP
