- linaro-toolchain - lists.linaro.org

by Yvan Roux

== 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, ...

9 years, 1 month

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[ACTIVITY] 26 - 30 June 2017

by Prathamesh Kulkarni

== 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

9 years, 1 month

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[ACTIVITY] 26 - 30 June 2017

by Diana Picus

== 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

9 years, 1 month

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[ACTIVITY] 26 - 30 June

by Yao Qi

# 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

9 years, 1 month

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[ACTIVITY] 26-30 June 2017

by Christophe Lyon

== 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, ....)

9 years, 1 month

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[ACTIVITY] 19 -23 June

by Yao Qi

# 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

9 years, 1 month

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[ACTIVITY] 19 - 23 June 2017

by Peter Smith

[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

9 years, 1 month

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[ACTIVITY] 19 - 23 June 2017

by Diana Picus

== 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

9 years, 1 month

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[ACTIVITY] Week 25

by Yvan Roux

== 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

9 years, 1 month

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[ACTIVITY] 19-23 June 2017

by Christophe Lyon

== Progress == * Infrastructure/validation: - looking at bug #3040 * Benchmarking: * GCC upstream validation: - working on further reducing noise ("random" pass/failures) - reported a few regressions - sent a couple of patches (testsuite, ARM_FEATURE_COPROC) * misc (conf-calls, meetings, emails, ....)

9 years, 1 month

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[ACTIVITY] Week 24

by Yvan Roux

== Progress == o Linaro GCC/Validation (7/10) * backports and branch merges for linaro branches 5, 6 and 7 * released GCC 6 and 7 2017.06 sources snapshots * Fxed GCC 5 branch merge * analyzed various infrastructure instabilities * Mingw32 libgomp build issue due to configure issue, working on a fix o Misc (3/10) * Various meetings and discussions. == Plan == o complete GCC 5 sources snapshot o Fix libgomp problem and continue on re-association

9 years, 1 month

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[ACTIVITY] 12 - 16 June 2017

by Diana Picus

== Progress == * TCWG-1172 - [ARM GlobalISel] Support G_FCMP [2/10] - In progress * TCWG-1168 - [ARM GlobalISel] Support G_ICMP [3/10] - Done, going to commit upstream * TCWG-1136 - LLVM 4.0.1 [1/10] - Spinned up rc3 * TCWG-1155 - Move ASAN 39bit bot to GlobalISel [2/10] - Investigated the timeouts in the test-suite and reported upstream - Sent a patch to increase the threshold for those tests on AArch64, waiting for feedback * TCWG-1166 - Investigate Clang diag-flags.cpp failure [1/10] - Bisected and reverted upstream * Misc [1/10] - Mailing lists, meetings etc == Plan == * Wrap up TCWG-1168 and 1172

9 years, 1 month

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[ACTIVITY] 12 - 16 June 2017

by Yao Qi

# Progress # * TCWG-1159, New design of GDB/GDBserver target description. [1/10] Finish writing the commit log and changelog. Patches are posted. * TCWG-1167, Test AArch32 GDB on AArch64 Linux kernel. [3/10] Such configuration shows one regression. It is whether condition checked failed UDF triggers Undefined Instruction Exception or not. GDB's assumption is NO, but Peter M. told me that it is implementation defined, so GDB has to handle both. * gdb/objdump disassembler unification. Done. [1/10] Commit the the left over patch. * Pick up Alan H.'s C++ template patch, and post it again. Learned a lot on C++ 11 default template parameter and SFINAE. Patch is committed. * Upstreams review. [3/10] ** Encourage people to build GDB with CLANG. Resist the objections from other people, and write the "policy" about using other compilers to build GDB. ** Review IBM's kernel-awareness v4 patches. * Misc, [2/10]. # Plan # Get chance to back to my interrupted works: * TCWG-333, Fix gdb.base/func-ptrs.exp fails in thumb mode. * TCWG-561, Handle unavailable memory during frame unwinding. -- Yao Qi

9 years, 1 month

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[ACTIVITY] 12-16 June 2017

by Christophe Lyon

== Progress == * Infrastructure/validation: - still some random results, and still ssh connexion problems with several machines - improving abe-bisect script * Benchmarking: * GCC: - 'deprecated IT-blocks' patch: looking at the generated code to understand the regressions * GCC upstream validation: - reported a couple of regressions on trunk, a few bisects, helped validating some ARM patches - working on further reducing noise ("random" pass/failures) - include qemu traces in the logs when a testcase aborts, to help debug * misc (conf-calls, meetings, emails, ....)

9 years, 1 month

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[ANNOUNCE] Linaro GCC 6 and 7 2017.06 source snapshots

by Yvan Roux

The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2017.06 snapshot of Linaro GCC 6 and 7 source packages. o 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 o Linaro GCC 7 monthly snapshot[1] is based on FSF GCC 7.1+svn249190 and includes performance improvements and bug fixes backported from mainline GCC. The contents of this snapshot will be part of the 2017.08 stable[2] quarterly release. This snapshot tarball is available on: http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.1-2017.06/ Interesting changes in this GCC source package snapshot include: * Updates to GCC 7.1+svn249190 * Backport of [Bugfix] [AArch32] PR target/71607 Fix ICE when loading constant * Backport of [Bugfix] [AArch64] PR target/80671 config/aarch64/cortex-a57-fma-steering.c:416: bad statement order * Backport of [Bugfix] PR tree-optimization/79697 unused realloc(0, n) not eliminated * Backport of [Bugfix] PR tree-optimization/80613 ICE in is_gimple_reg_type with -O2 * Backport of [AArch32] Add a new target hook to compute the frame layout * Backport of [AArch32] Add fuchsia support to libgcc * Backport of [AArch32] FreeBSD arm libgcc config.host * Backport of [AArch32] Model Cortex-A53 load forwarding * Backport of [AArch64] Accept more addressing modes for PRFM * Backport of [AArch64] Add aes and sha reservations for Thunderx2t99 * Backport of [AArch64] Add crc reservations for Thunderx2t99 * Backport of [AArch64] Improve float to int moves * Backport of [AArch64] Set jump alignment to 4 for Cortex cores * Backport of [AArch64] Tighten move constraints for symbolic operands * Backport of [Misc] Check the alternate cost model just as costs_lt_p * Backport of [Misc] Record equivalences for spill registers * Backport of [Testsuite] [AArch32] Only test tls-disable-literal-pool.c if target supports native TLS * Backport of [Testsuite] [AArch32] Replace absolute line numbers in gcc.target/arm * Backport of [Testsuite] [AArch64] Replace absolute line numbers in gcc.target/aarch64 o Linaro GCC 6 monthly snapshot[1] is based on FSF GCC 6.3+svn249140 and includes performance improvements and bug fixes backported from mainline GCC. This snapshot contents will be part of the 2017.08 stable[2] quarterly release. This snapshot tarball is available on: http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.3-2017.06/ Interesting changes in this GCC source package snapshot include: * Updates to GCC 6.3+svn249140 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.

9 years, 2 months

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[ACTIVITY] 05 - 09 June 2017

by Peter Smith

== Progress == LLD - Committed refactoring patches to enable long range thunks. This should unblock progress towards upstreaming patches. - Rebased and sent out for review first patches in series. Expecting slow but steady progress as I hope to not need much more large scale refactoring. == Plans == Compiler-rt - Investigated cross-compilation and testing via qemu user mode emulation. It seems to be possible to do so, although fiddly to set up Plans for this week: - LLD long range thunks - Build up a task list for compiler-rt - Likely take Friday on holiday

9 years, 2 months

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[ACTIVITY] Week 23

by Yvan Roux

== Progress == o Linaro GCC/Validation (7/10) * Completed and released 7.1-2017.05 release * Preparing backports for 2017.06 source snapshot * Checked upstream status w/r to merge regression observed: issue fixed * Investigating mingw32 libgomp build issue * Switched abe/stable to abe/tested branch o Misc (3/10) * Various meetings and discussions. == Plan == o 2017.06 snapshot o Fix libgomp problem and continue on re-association

9 years, 2 months

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[ACTIVITY] 5 - 9 June 2017

by Diana Picus

== Progress == * [ARM GlobalISel] Support AND, OR, XOR [TCWG-1157] [2/10] - Committed upstream * [ARM GlobalISel] Fix arm-irtranslator test [TCWG-1146] [1/10] - Committed upstream * [GlobalISel] Remove the G_SEQUENCE node [TCWG-1138] [1/10] - Removed the G_SEQUENCE node from the ARM backend * [ARM GlobalISel] Support mod [TCWG-1105] [2/10] - Have some patches downstream for handling this - Not sure it's the best way to go, so I've been asking for some guidance before moving forward with it * [Helpers] Add "push" capability [TCWG-1141] [2/10] - Almost ready, will send a pull request next week * Misc [2/10] - Mailing lists, meetings, buildbot monitoring - Opened a backport request for Ubuntu Xenial binutils for an lld bug that is affecting our buildbots == Plan == * More GlobalISel * Check if our internal buildmaster works now, try to setup some buildbots

9 years, 2 months

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[ACTIVITY] 05 - 09 June 2017

by Yao Qi

* One day off on Monday [2/10] # Progress # * GDB 8.0 is released! TCWG-1050. Done. * GDB target description changes. [5/10] It is needed for adding SVE in GDB. Change GDB target description, and start from x86-linux. The more I write the code, the more right I believe the change is. Patches are done, but still need to complete commit log, changelog, and polish the code. Write an abstract about it for GNU Cauldron. Spend some time thinking about a good title. * Upstreams review. [1/10] ** Review some Alan H.'s patches. ** Review the OpenRISC patches. * Misc, [2/10] ** Follow up the OpenOCD work. Create two epics for the following work. ** Meetings. # Plan # * Post my target descriptions changes upstreams. * Post some leftover patches about GDB and OBJDUMP disassembler unification. -- Yao Qi

9 years, 2 months

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[ACTIVITY] 5-9 June 2017

by Christophe Lyon

Short week (Monday off) == Progress == * Infrastructure/validation: - reviews - noticed ~random results in one binutils test on apm/tk1, didn't understand the problem yet. Manual runs all succeeded :( * Benchmarking: - comparison script/job - reviews * GCC: - benchmarking old 'deprecated IT-blocks' patch. Seems to confirm large regressions on some benchmarks, and non-functional on at least one bench. - sent updated testsuite patch to support -march=armv5t runtestflags after dejagnu update - testing: checked a config --with-cpu=arm10tdmi instead of forcing -march-armv5t via runtestflags, to see how the validation results differ: not much, so if my previous patch is not accepted, I might change the configurations I use for non-regression testing - reported a couple of regressions on trunk * misc (conf-calls, meetings, emails, ....)

9 years, 2 months

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[ANNOUNCE] Linaro Binary Toolchain Release GCC 7.1-2017.05

by Yvan Roux

The Linaro Binary Toolchain ============================ The Linaro GCC 7.1-2017.05 Release is now available. *Notice*: GCC 7.1 ABI change for arm*-*-* targets, and note for aarch64*-*-* targets >From GCC 7.1 release notes: On ARM targets (arm*-*-*), a bug introduced in GCC 5 that affects conformance to the procedure call standard (AAPCS) has been fixed. 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. This is an ABI change. If the option -Wpsabi is enabled (on by default) the compiler will emit a diagnostic note for code that might be affected. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728 GCC 5 and GCC 6 releases will continue to be affected by the ABI bug, since changing ABI in these releases is not practical. A warning enabled by -Wpsabi option was added to GCC 5 and GCC 6 toolchains to diagnose codebases that might be affected by the ABI bug. Additionally, this same bug was present in AArch64 backend in development versions of GCC 7. There was no releases of GCC with this bug present in AArch64 backend, therefore the release notes does not mention this. However, be advised that any code bases built with development versions of GCC 7 need to be recompiled with released version of GCC 7 to conform to ABI. For an explanation of GCC 7 series changes please see the following website: https://gcc.gnu.org/gcc-7/changes.html For help in porting to GCC 7 please see the following explanation: https://gcc.gnu.org/gcc-7/porting_to.html Download release packages from: (sources) http://releases.linaro.org/components/toolchain/gcc-linaro/7.1-2017.05/ (binaries) http://releases.linaro.org/components/toolchain/binaries/7.1-2017.05/ Previous snapshots and release-candidates are at: http://snapshots.linaro.org/components/toolchain/binaries/ Previous releases are at: http://releases.linaro.org/components/toolchain/binaries/ A description of the arm and AArch64 target triples can be found at: https://collaborate.linaro.org/display/TCWGPUB/ARM+and+AArch64+Target+Tripl… Host Requirements ================== Linaro officially supports the current and previous Ubuntu LTS releases (as of the time of this release). This does not mean that the toolchain will not work on other/older Linux distributions. See the following for the life-time of Ubuntu LTS releases. https://wiki.ubuntu.com/Releases The host system upon which the cross-compiler will run requires a minimum of glibc 2.14, because of API changes to glibc's memcpy API. https://bugs.linaro.org/show_bug.cgi?id=1869 Package Versions ================= Linaro GCC 7.1-2017.05 http://releases.linaro.org/components/toolchain/gcc-linaro/7.1-2017.05/ FSF glibc 2.25 (release/2.25) https://lists.gnu.org/archive/html/info-gnu/2017-02/msg00002.html Newlib 2.5 (newlib-2_5_0 tag) https://sourceware.org/ml/newlib/2016/msg01191.html GNU Binutils 2.28 (binutils-2_28-branch) https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob_plain;f=bin… FSF GDB 8.0 (gdb-8.0-branch) https://sourceware.org/ml/gdb-announce/2017/msg00003.html Linaro toolchain package git branches are hosted at: http://git.linaro.org/toolchain NEWS for GCC 7 (as of Linaro GCC 7.1-2017.05) ============================================== * Performance related backports from the following snapshots have been included: Linaro GCC 7.1-2017.05. See the following Linaro GCC snapshots: http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.1-2017.05/ Contact Linaro =============== File bugs at http://bugs.linaro.org For Linaro member support see http://support.linaro.org For Linaro community support email linaro-toolchain(a)lists.linaro.org

9 years, 2 months

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[ACTIVITY] 29 May - 2 June 2017

by Peter Smith

Progress - Long range thunks Committed a couple of refactorings on .ARM.exidf and SHF_LINK_ORDER support. With luck final patch for SHF_LINK_ORDER will be approved next week Submitted patches to convert existing Thunk Implementation to use InputSectionDescriptions. Hopefully these ones are broken down into small enough parts for upstream to look at. - Tracked down https://bugs.llvm.org/show_bug.cgi?id=33136 libc++ failing ~100 tests with std::bad_cast exception when built in release mode. Was down to global-merge incorrectly merging globals that were not DSO local. Looks to have been fixed quickly - llvm-mc Helped out with D33436 review on how to do interworking branches in assembler D33492 accepted, will commit next week. Plans: - Long range thunks Continue with slow progress towards upstreaming - Investigate compiler-rt

9 years, 2 months

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[ACTIVITY] Week 22

by Yvan Roux

== Progress == o Linaro GCC/Validation (7/10) * Deployed 7.1 release candidate * Catching up with re-association development * Preparing switch to abe/tested branch o Misc (3/10) * Various meetings and discussions. == Plan == o release 7.1 2017.05 o Continue on re-association

9 years, 2 months

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[ACTIVITY] 29 May - 2 June 2017

by Diana Picus

== Progress == * [GlobalISel] AArch64 test-suite and self-host [TCWG-1074] [3/10] - Reported and investigated a codegen issue introduced by one of Quentin's patches, which was appearing while selfhosting with GlobalISel - Ran the test-suite and self-host again after it was fixed * [ARM GlobalISel] Add support for struct / array args [TCWG-1033] [3/10] - Committed the lowering part upstream - Still needs support in the rest of the pipeline but that will be a different issue * [Helper scripts] Add "push" capability [TCWG-1141] [1/10] - Started writing tests * Misc [3/10] - Meetings, mailing lists, babysitting the buildbots - [GlobalISel] Run precommit for Daniel's patch [TCWG-1142]: did another run for this - LLVM 4.0.1 [TCWG-1136]: ran rc2 on ARM and AArch64 == Plan == * [ARM GlobalISel] Fix arm-irtranslator test [TCWG-1146] * Replace D01s by Scaleway boards [TCWG-836] * More GlobalISel stuff

9 years, 2 months

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[ACTIVITY] 29 May-2 June 2017

by Christophe Lyon

== Progress == * Infrastructure: - improvements in binutils Jenkins jobs, to track regressions rather than always report 'failed'. Pass ratio can still be very low in some configs (eg arm-pe) * Benchmarking: - work around problems with many simultaneous ssh connexions for remote cross-compilation * GCC: - benchmarked old 'deprecated IT-blocks' patch. - reported a few regressions in trunk - looking at testsuite-isms: problems with some multilibs after dejagnu upgrade (where multilib flags are now prepended, rather than appended previously) * misc (conf-calls, meetings, emails, ....) == Next == * Short week (off Monday) * Benchmarking scripts * GCC

9 years, 2 months

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