[ACTIVITY] 16 - 20 May 2016

[Yao Qi]

# Progress #

* TCWG-518, [6/10]
fix all bugs, and post them upstreams for review!

* PR 19998, write a patch to fix it. [2/10]

* Some discussions on unstable GDB test results in validation tests.
[1/10]

* Meetings [1/10]

# Plan #

* Respond comments to my patches,
* TCWG-333, think about the right fix.

[Peter Smith]

=== Progress ===
TCWG-591 MOVW incorrectly allowed on ARM v5 committed upstream
TCWG-595 LLD port to ARM architecture
I am getting close to being able to run hello world built with lld.
I'm converging 1 bug at a time.
- The PLT handling code is working and the loader can execute the
image and starts the .init function.
- Currently failing in the weak call to __gmon_start__. At present lld
is removing undefined weak references from executables instead of
passing them on for the dynamic loader to resolve. This may not be
necessary on x86 but it is necessary on ARM.
-- Just finished a hack that should make this work, although it will
need some tidying up.

=== Plan ===
Get hello world working and then take stock of what I've learned and
come up with a plan in Jira for what needs to be done.

[Kugan Vivekanandarajah]

== 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

[Omair Javaid]

=== 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