-- Progress --
TCWG-829 IFunc support
I have a downstream implementation of ifunc using synthetic sections
that handles x86_64, ARM and AArch64. I think it may be a bit too
complex to upstream in its current form but I think it is illustrative
enough to post upstream for comment.
TCWG-828 Static TLS support
Implemented using new GOT structure and successfully upstreamed.
Took up an opportunity to get involved with progressing some AArch64
documentation back at ARM.
-- Plans --
Will post current state of TCWG-829 (ifunc) for feedback on whether
the design is right.
- Write more tests for TCWG-829.
- Work on TCWG-911 eglibc insists on .ARM.attributes section for
dlopen to work and TCWG-919 Thunks to undefined symbols for shared
libraries that call back to the application.
- Spend some time reviewing and updating AArch64 documents back at ARM.
== Progress ==
o Linaro GCC/Validation (7/10)
* [TCWG-936] Regression detection:
- a bit of work on the job and discussing improvement.
* [TCWG-955] Re-association:
- learning middle-end internals
- some testing and debug
o Misc (3/10)
* Various meetings and discussions.
== Plan ==
same as last week:
o Improve regression detection job
o Improve linaro gcc integration validation
o Continue re-association learning
== Progress ==
* Validation
- patches & reviews (jenkins jobs, abe)
- improving abe validation
- abe cleanup
- looking at abe bug 757: add support to run newlib's make check
* GCC
- reported a few regressions on trunk
- bug #78253: new patch sent upstream
* misc (conf-calls, meetings, emails, ....)
- updated arm-neon-tests repo: add the possibility to avoid that the
compiler computes the results of some of the intrinsics (clang/llvm
does some optimisations, but does not model the Neon Q flag)
== Next ==
* ABE & Jenkins jobs patches reviews and bug fixes
* GCC bug #78253
== This Week ==
* TCWG-971 (4/10)
- Prototype patch can handle simple cases
* GCC bugs (5/10)
a) PR78529 - Cannot reproduce after several tries :(
b) PR78599 - Submitted patch upstream to bail out of bits prop if
param type is not integral or pointer type, but a better fix
would be to obtain type from jump_function. I can use that approach
once
Kugan's patch to add param_type to jump_function gets committed.
c) TCWG-963 - Patch iteration based on upstream feedback.
d) PR78629 - Committed fix r243125 to trunk.
* Misc (1/10)
- GCC ubsan builds
- Meetings
== Next Week ==
- TCWG-971
- GCC bugs
- Single vs Balanced partition benchmarking
~ Progress ~
* TCWG-965, Investigate doing unit tests in GDB. [3/10] Done.
The first unit test to AArch64 prologue analyser is pushed. The unit
test is running on GDB buildbot on different hosts (x86, s390, etc).
The patch review takes a while because it is my first patch written in
C++11. Need some unit tests to ARM prologue analyser too.
* TCWG-416, Improve GDB performance in remote debugging. [4/10]
Use code cache in AAarch64 prologue analysis, and it is improved from
10s to 3s!
* TCWG-333, Fix gdb.base/func-ptrs.exp fails in thumb mode. [1/10]
Preparatory patches are committed. Think about the next step. I have
to change expression evaluation in GDB.
* Misc, [2/10]
** Upstream patches review. Reviewed OpenRISC and FreeBSD/mips
patches.
** GDB linux kernel awareness discussion.
GDB is unable to access kernel memory when program stops in user
space (by ctrl-c). Discussed some ways to avoid teaching GDB setting
MMU.
** Some input and discussion on SVE.
~ Plan ~
* TCWG-964, more unit tests on ARM prologue analyser,
* TCWG-416, measure performance improvement with -fstack-protector
on ARM (with both -marm and -mthumb).
* TCWG-333,
--
Yao Qi
== Progress ==
- Posted a revised patch for PR78365
- Fixed ICE and Spec2006 benchmarked type promotion pass
* There are couple of mis-compares that needs fixing
- Setup perf in r1-a12 and analyzing for type promotion and lto
- Documented tasks within reassoc
== Plan ==
- Perf analysis of LTO
- Type promotion pass
- Work on upstream bugs
== Progress ==
o Linaro GCC/Validation (6/10)
* Created regression detection job [TCWG-936]
* Fought with infrastructure / jenkins plugins issues
* Start to look at re-association [TCWG-955]
o Misc (4/10)
* Various meetings and discussions.
== Plan ==
o Improve regression detection job
o Improve linaro gcc integration validation
o Continue re-association learning
# Progress #
* TCWG-923, Use regcache instead of frame in software_single_step. [1/20]
Patches are pushed in. Done.
* TCWG-333, Fix gdb.base/func-ptrs.exp fails in thumb mode. [3/10]
Another three preparatory patches are approved. Ongoing.
* TCWG-416 Improve GDB performance in remote debugging. [3/10]
Prologue analysis performance on arm-linux is improved a lot (from
39s to 12s in one case), but no change on aarch64-linux. Looks GDB
doesn't recognise "str x19, [sp, #-48]!" as part of the prologue.
* TCWG-965 Unit test in GDB. [2/10]
Investigate how to do unit test to prologue analysis in GDB, to
address the bug above. We can embed some test code in GDB, and invoke
them by a special command. It is a little big ugly, but better than
nothing. Need some refactor to aarch64 backend for unit test.
* Patches review, [1/10]
** Reviewed two new GDB ports, RISC-V and OpenRISC.
** Chat with Antoine on ptrace atomicity, and insist that he should
refactor 'struct tracepoint' before add arm-linux tracepoint
support.
# Plan #
* TCWG-333
* TCWG-416
* TCWG-965
--
Yao Qi
== This Week ==
* GCC bugs (6/10)
a) PR78154: Fix committed to trunk.
b) PR78153: Fix committed to trunk.
c) PR78501: Committed to trunk, which fixes ada bootstrap but didn't
fix profiledbootstrap.
d) TCWG-957: Submitted patch upstream, Richard rejected the transform
to be done in copyprop.
Looking at handling this in VRP instead.
e) TCWG-963: Submitted patch upstream, reviews by Richard and Jeff.
* GCC cleanup patches (1/10)
- Committed r242888 to move initialization of ptrdiff_type_node to middle-end.
* TCWG-971 (2/10)
- Working on prototype patch to re-materialize local variables in the
split function that were derived
from arguments.
* Misc (1/10)
- Meetings
== Next Week ==
- ipa-bits-propagation: save types in jump fn instead
- TCWG-971
- GCC bugs
