* Friday off
== Progress ==
* GCC:
- FDPIC: started taking feedback into account. Changes under test.
- noinit attribute: posted a new version
* GNU-583 (Fix Linux kernel built for Thumb-2 with GCC using LTO)
- no progress this week
* GCC upstream validation:
- no new issue this week.
* Binutils:
- Non-contiguous memory regions support in the BFD linker: not started
yet. Received a few "warnings" as feedback.
* misc:
- infra fixes / troubleshooting
== Next ==
GCC:
- handle feedback on FDPIC and noinit patches
- binutils/linker support for non-contiguous memory regions
- GNU-583
- GCC upstream validation: Add a config for cortex-m33 (v8-m)
== Holidays ==
Aug 2-11 (next week)
[PR42719] BasicAA UnitTest failure on AArch64 when compiled with GCC
- Patch submitted upstream
[PR42853] LLD support for TPREL_G0 relocations
- In theory a simple change, but llvm-mc seems to be deliberately
doing something strange with MOVZ encodings fixMOVZ and I haven't
worked out why it is needed.
Investigations with respect to inline assembler constraints.
- Some patch review comments for my ABE (Linaro GCC build system)
patch for GCC RM multilibs
- LLD review for smaller AArch64 images.
- Wrote a summary of what TCWG do for the upstream community, may turn
into a Linaro blogpost
- Raised GCC PR91299 to cover incorrect weak definition inlining in
GCC LTO in presence of non-weak definition.
On holiday Friday 2nd August, back in the office on Monday.
[VIRT-263 # ARMv8.1-VHE Virtual Host Extensions ]
Merged some fixes from Alex.
Starting to test kvm-inside-tcg.
[VIRT-327 # Richard's upstream QEMU work ]
Posted v1 of aa32 base isa conversion to decodetree.
Reviewed v5 of the sparc64 invert endian tlb bit patches.
r~
[ACTIVITY] On buildbot and Linux kernel CI duty
- One obscure alias analysis bug that only failed on GCC on AArch64
that suddenly started failing a unit test. Tracked down to an
unitialised variable when API called directly via unit-test. Test has
been reverted, but I've put enough information in a PR for an AA
expert to either fix the test or initialise class member pointer to
nullptr.
- A long review of an LLD patch that changes page-alignment rules and
this has impact on the TLS address. Spent way too long trying to
reverse engineer why the formula used would work, needed to find the
corresponding loader code to find the other side.
- Assertion added to LLVM triggered a failure in Linux kernel build,
reproduced example and forwarded on
- Code size investigation Linaro Connect proposal accepted, now have
to write it.
Progress:
* VIRT-65 [QEMU upstream maintainership]
+ QEMU 4.1 rc2 tagged
+ investigated and sent patches for a problem reported by Mark Rutland
where we still were sometimes putting the initrd on top of the kernel
in our built-in bootloader code
+ spent a couple of days tracking down the cause of LP:1696773, an
intermittent bug when running AArch64 Go programs under QEMU linux-user
mode. This turned out to be an incorrect implementation of 'sigaltstack'
as setting a process-wide signal stack rather than a per-thread one.
+ prompted by a patch from Greensocs fixing a vmstate migration bug
in the pl330 model, improved the vmstate macros to catch that category
of bug; this detected one other bug lurking in a different device.
thanks
-- PMM
== Progress ==
* LLVM 8.0.1 final binaries uploaded
* Use ninja in release job [LLVM-536]
- Patches ready, but waiting for 9.0.0-rc1 so I can test (was
supposed to come out this week but got postponed to Monday)
* Investigate running benchmarks in containers [TCWG-1513]
- Still having trouble, but working on it
* IR SVE reviews [LLVM-545]
- Posted some feedback to D53137
* A bit of fuzzing of GlobalISel CallLowering for AArch32
== Plan ==
* Upcoming vacation: 6 - 13 August
