== Activity ==
- Rebased and posted for review all my range-thunks work for LLD as
there had been some interest from some individuals on IRC in trying
out the patch.
-- Seems to work for them
-- Hoped that this might provoke upstream into looking and reviewing
the patches but no such luck.
- Landed the patch that sets _GLOBAL_OFFSET_TABLE_ so that FreeBSD can
link on ARM
- Some other small lld patches
- Investigations into whether an X86 patch might affect CFI generation
for AArch64.
Spent some time banging my head against the compiler-rt build system
to try and see if I can get a cross-compiled build and test run on
Qemu when my compiler-rt target != the default target (i.e. I want to
build clang with ARM and AArch64 targets and cross-build and test all
the ARM compiler-rt targets from that)
- Thwarted by what seems to be inconsistent decisions about
auto-detection of options, what is an architecture, target, sub-target
and abi.
- By passing in all auto-generated options by steam I'm still hitting
some problems with some tests that have an external assembly file.
Found numerous other small inconsistencies that I'll need to write up.
== Plans ==
- Ping the Range Thunks reviews again.
- Compiler-rt
Aim to get to the point where I can write a coherent mail to llvm-dev
explaining what I think is wrong and what I think needs changing.
== Progress ==
o Linaro GCC/Validation (7/10)
* Fixed AArch64 GCC options documentation
ARM part clean-up on-going
* libgomp/mingw patch: Upstream review pending
* pc-relative-literal-loads patch for GCC 6 branch: Upstream review pending
reviewed fxi for trunk.
* Following upstream discussions on stack clash CVE:
- One AArch64 specific commit done (backport in our branch on-going)
- Fix still under discussion upstream, nothing committed yet
* catching-up with re-association work
* libunwind support
o Misc (3/10)
* Various meetings and discussions.
== Plan ==
o backports for 2017.07, CVE, ...
== This Week ==
* Type promotion (6/10)
- Created patch to fix ICE with pr81083.c on ppc64
- Investigated mis-compilation of memcpy-bi.c on ppc64
* Malloc propagation (1/10)
- Working on patch based on feedback received.
* Public Holiday (2/10)
* Misc (1/10)
- Meetings
== Next Week ==
- Type promotion: Look at miscompilation bug, and investigate
performance regression for path
splitting optimization
- Malloc propagation
== Progress ==
* TCWG-1155 - Move ASAN 39bit bot to GlobalISel [1/10]
- Moved to the public silent master, ready for the final move on
Monday if it's stable until then
* TCWG-1172 - [ARM GlobalISel] Support G_FCMP [5/10]
- Most of the functionality is implemented, but I intend to do a lot
of refactoring before committing
* TCWG-1174 - [ARM GlobalISel] Support G_SELECT [1/10]
- Committed upstream
* Misc [3/10]
- Mailing lists, buildbots, discussions
== Plan ==
* Wrap up TCWG-1172
* More GlobalISel
* More code reviews
# Progress #
* TCWG-1159, New design of GDB/GDBserver target description. [4/10]
People agree on the direction this patch series goes to! Still
need to polish v3.
Started to write v3 to address comments, split patches, and rebase
patches, etc...
My Cauldron talk "A flexible GDB target
description for processor diversity " is registered.
* TCWG-561, Handle unavailable memory during frame unwinding. [2/10]
Decided how to do it, coding.
* Investigate the usage of obstack in GNU toolchain. [1/10]
We recently add a convenient class wrapper for obstack in GDB, and
I think it is better to "upstream" it to inlcude/ so that GCC can use
it as well. Did some archeology on C++ transition in GCC, find some
difficulties. Still good to know some GCC maintainers' preference on
C++.
* Travel, [1/10]
** US EVUS enrollment, to update my US visa information.
** Figure out the Cauldron flight.
* Misc, meeting, [2/10].
# Plan #
* TCWG-1159, patch v3.
--
Yao Qi
== Progress ==
* Infrastructure/validation:
- iterated on patch for bug #3040: 1 abe patch to use libiconv, 1
linaro-gcc-6 patch (partial backport to make enable-nls and libiconv
work together)
* Benchmarking:
- noticed large differences in bench results from one run to another
while looking at "deprecated it block" patch
- trying less aggressive configuration
* GCC upstream validation:
- working on further reducing noise ("random" pass/failures)
- reported/fixed a few regressions
- committed testsuite patch (for arm-neon flags)
* misc (conf-calls, meetings, emails, ....)
# Progress #
* TCWG-1159, New design of GDB/GDBserver target description. [3/10]
Update patches to address review comments. Commit three patches.
Need to post V3.
* TCWG-561, Handle unavailable memory during frame unwinding. [2/10]
Think about the plan.
* Upstream patches review. [3/10]
** Review IBM kernel-awareness patches.
** Review sparc64 adi patch.
** Review Alan's patch on removing MAX_REGISTER_SIZE. Evaluate other
better but expensive approach.
* Misc, [2/10]
Write a STL container allocator which uses stack instead of heap.
Underestimate the complexity of C++. Need to replace some std::vector
with my vector with stack_allocator in GDB. It should be also useful
to Alan.
# Plan #
* TCWG-1159, send v3.
* TCWG-561, Handle unavailable memory during frame unwinding.
--
Yao Qi
[TCWG-614] Range extension thunks
- No progress on upstream reviews from maintainers this week
I have received some interest on IRC and on at least one of the
reviews from other people wanting the feature so I'm hoping that this
may speed up the process.
- I've committed to rebasing and posting the full patch-set for review
so that interested people can take it and test.
PR31159 Tracked down why LLD wasn't correctly linking ARM BSD port
- lld only provides a dummy absolute value for _GLOBAL_OFFSET_TABLE_
- llvm-mc doesn't transform .word _GLOBAL_OFFSET_TABLE_ - . into
R_ARM_BASE_PREL like GNU as does, this relocation doesn't use the
value of _GLOBAL_OFFSET_TABLE_ . Instead we get R_ARM_REL32 which
needs _GLOBAL_OFFSET_TABLE_ to be set correctly. PR335511
- Patch accepted upstream will commit today
Misc:
- lld consultancy for Android
- Help to fix build error on clang for ARM colleague
- Query on lld behaviour with respect to .ARM.extab, I think lld
behaviour is within spec, but it may be producing larger files so
probably enough to argue the case for a small patch.
-No time to spend on compiler-rt this week
Plans:
- Post all the range-thunk patches for the people interested in it.
- Commit patches accepted last week
== Progress ==
* Out of office on Friday [2/10]
* TCWG-1155 - Move ASAN 39bit bot to GlobalISel [1/10]
- Committed a quick fix and started seeing green builds on this, we
can probably move it upstream soon
* TCWG-836 - Replace D01s by Scaleway boards [2/10]
- Set up a selfhost buildbot on one of the Scaleway boards
- It is very, very slow, I did some performance experiments but
there's probably more that can be attempted here
* TCWG-1172 - [ARM GlobalISel] Support G_FCMP [2/10]
- The hard float part is implemented, fiddling with the soft float now
- Forked some of that work into a different story for supporting G_SELECT
* TCWG-1174 - [ARM GlobalISel] Support G_SELECT [1/10]
- In progress
* Misc [2/10]
- Mailing lists, code reviews
- TCWG-1136 - LLVM 4.0.1 - Spun up and uploaded the final release candidate
- TCWG-1177 - Investigate failure on clang-cmake-aarch64-lld -
Bisected and reverted a commit upstream
== Plan ==
* More GlobalISel
* More buildbots
* More code reviews
== Progress ==
o Linaro GCC/Validation (7/10)
* Prepared a fix for libgomp/mingw build issue. Submitted upstream
* Analysed ubuntu bug report on unsupported relocations:
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1695093
- Identified it as upstream PR 79041
- Fix submitted upstream
* Following upstream discussions on stack clash CVE
- Releases re-spins will done once the issue will be fixed upstream
o Misc (3/10)
* Various meetings and discussions.
== Plan ==
o CVE, on-going patches and infra
