== Progress ==
* FDPIC
- (GNU-411) GDB: gdbserver did not start because of a qemu-user
feature. Worked around it.
* GCC upstream validation:
- reported a few regressions
- dealing with some random results, still
- qemu-3.1 memory consumption. Got some clarifications from IT team
about LSF reports.. It seems qemu-3.1 consumes more memory in some
cases, though.
* GCC:
- (GNU-99) rebased ubsan / bare-metal patches. No progress.
- (GNU-597) Fixed arm testcase.
- PR 85596 committed doc fix
* misc (conf-calls, meetings, emails, ....)
- reviewing/submitted infra script patches
- dealing with nasty ST-internal infrastructure problems
- (GNU-592): improved benchmarking scripts
- experimenting with new build servers
- ran Linaro binary toolchain tests on gcc-arm release, filled a few bug reports
== Next ==
FDPIC:
- GCC: handle feedback on v4 patches
- GDB: update patches
- uclibc-ng: look at how to test fdpic mode with openadk
Validation:
- isolate if/why qemu-3.1.0-rc3 consumes more memory than 2.11 for
aarch64-linux target
== Progress ==
* [ARM GlobalISel] Select complicated G_CONSTANT [LLVM-491]
- Committed upstream
* [ARM & Thumb GlobalISel] Support calls to vararg functions [LLVM-490]
- This gets rid of all the fallbacks in the test-suite related to
calls to printf (which is a lot)
- Committed upstream
* Use new version of GCC on buildbots [LLVM-515]
- Fiddled with this a bit, but couldn't test much due to dockerd
being broken for a couple of days
- Manual installation of g++-7 from PPA works, but when trying the
same steps in the dockerfile it keeps restarting; need to investigate
why
== Plan ==
* More of the same
The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2019.01 snapshot of the Linaro GCC 7 source package.
The GCC 7 series introduced an ABI change for ARM targets by fixing a bug (present since GCC 5, see link below) that affects conformance to the procedure call standard (AAPCS). The bug affects some C++ code where class objects are passed by value to functions and could result in incorrect or inconsistent code being generated. If the option -Wpsabi is enabled (on by default) the compiler will emit a diagnostic note for code that might be affected by this ABI change.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728
For an explanation of the changes please see the following website:
https://gcc.gnu.org/gcc-7/changes.html
This snapshot1 is based on FSF GCC 7.4+svn267072 and includes performance improvements and bug fixes backported from mainline GCC. The contents of this snapshot will be part of the 2019.01 stable2 periodic release.
Interesting changes in this GCC source package snapshot include:
Updates to GCC 7.4+svn267072
Linaro bug 4007: “Internal compiler error with -mcpu=thunderx2t99” is fixed
Feedback and Support
Subscribe to the important Linaro mailing lists and join our IRC channels to stay on top of Linaro development.
o Subscribe to the important Linaro mailing lists and join our IRC channels to
stay on top of Linaro development.
** Linaro Toolchain Development mailing list:
http://lists.linaro.org/mailman/listinfo/linaro-toolchain
** Linaro Toolchain IRC channel on irc.freenode.net at #linaro-tcwg
* Bug reports should be filed in Bugzilla against GCC product:
http://bugs.linaro.org/enter_bug.cgi?product=GCC
* Interested in commercial support? inquire at Linaro support:
mailto:support@linaro.org
[1]. Source package snapshots are defined when the compiler is only
put through unit-testing and full validation is not performed.
[2]. Stable source package releases are defined as releases where the
full Linaro Toolchain validation plan is executed.
IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.
== Progress ==
* SVE ACLE
- Revised svmla, svmls, svmad and svmsb and committed after getting ACK
- Revised again posted for review
* svabs, svneg, svnot and svsqrt series
* svdiv series
* svmulh series
* svand, svorr, and sveor series
* svdot series
== Plan ==
* Contine with sve acle
[LLVM-520] LLD Fix movt/movw relocation overflow
Now committed upstream.
[LLVM-521] Taking the address of an ifunc in AArch64
Prompted by a bug report and comment about pointer equivalence, spent
some time looking into gold, lld and bfd behaviour to ensure that LLD
is at least correct.
Other
Some investigation into LLD non-support of common-page-size and
whether this is significant for code-size. Used in response to query
about whether LLD should change default value of max-page-size.
Thoughts about whether a linker must generate cantunwind .ARM.exidx
sections for code sections missing a .ARM.exidx section. If C++ code
with exceptions is interleaved with some assembly code without
.ARM.exidx sections then the assembly code can match the address range
of the C++ code that precedes it.
