- linaro-toolchain - lists.linaro.org

[ANNOUNCE] Linaro GCC 4.9 and 4.8 2014.08 released

by Yvan Roux

The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2014.08 stable release of both Linaro GCC 4.9 and Linaro GCC 4.8 source package. With the imminent release of ARMv8 hardware and the recent release of the GCC 4.9 compiler the Linaro TCWG will be focusing on stabilization and performance of the compiler as the FSF GCC compiler. The Linaro TCWG provides stable[1] quarterly releases and monthly engineering[2] releases. Linaro GCC 4.9 2014.08 is the fifth Linaro GCC source package release and first stable one in the 4.9 series. It is based on FSF GCC 4.9.2-pre+svn213803 and includes performance improvements and bug fixes. Interesting changes in this GCC source package release include: * Updates to GCC 4.9.2-pre+svn213803 * Backport of [AArch64] Drop ISB after FPCR write. * Backport of [AArch64] Remove from arm_neon.h functions not in the spec * Backport of [AArch32] Fix check for __FAST_MATH in arm_neon.h * Backport of [AArch64] fix and enable non-const shuffle for bigendian using TBL instruction * Backport of [AArch64] Fix constraint vec_unpack_trunk * Backport of [AArch32] Cortex-A5 rtx costs table * Backport of [AArch32] Handle clz, rbit types in arm pipeline descriptions * Backport of [AArch64] Fix argument types for some high_lane* intrinsics implemented in assembly * Backport of [AArch64] Handle fcvta[su] and frint in RTX cost function * Backport of [AArch64] Prologue rewrite + performance. Linaro GCC 4.8 2014.08 is the fourteenth release in the 4.8 series and is in maintenance. Based off the latest GCC 4.8.4+svn213802 release, it includes performance improvements and bug fixes. Interesting changes in this GCC source package release include: * Updates to GCC 4.8.4+svn213802 * Backport of Fix [AArch32] for PR sanitizer/58543 * Backport of Fix [AArch64] for PR target/59744 Feedback and Support 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 Launchpad against "Linaro GCC project": http://bugs.launchpad.net/gcc-linaro/+filebug. * Questions? "ask Linaro": http://ask.linaro.org/. * Interested in commercial support? inquire at "Linaro support":mailto: support(a)linaro.org [1] Stable source package releases are defined as releases where the full Linaro Toolchain validation plan is executed. [2] Engineering source package releases are defined as releases where the compiler is only put through unit-testing and full validation is not performed.

11 years, 4 months

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[ACTIVITY] 11 - 15 August 2014

by Will Newton

= Progress == * Upstream work (4/10, CARD-341) - Patch review (gdb, binutils) - glibc testsuites for ARM and AArch64 * Booting upstream kernel on Chromebook (4/10) - Tried u-boot path but Google's shipped NV u-boot is broken in several ways - Fall back to trying to boot a signed upstream kernel - Gets halfway through boot then seems to turn the regulators off * Malloc application benchmarking (2/10, TCWG-441) - Add pdf library benchmark to benchmark suite - Improve argument parsing and result plotting - Seem to be hitting some new issue with mounting memory cgroup within docker == Issues == * None == Plan == * Iron out issues with malloc benchmark framework * Get Chromebook booting -- Will Newton Toolchain Working Group, Linaro

11 years, 4 months

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[ACTIVITY] Week 33

by Renato Golin

== Progress == * Benchmarks (CARD-716 2/10) - Wrapping up SPEC run, some results - Fix missing tests, running with -ffast-math * Toolchain (CARD-862 4/10) - A few more assembler fixes - http://llvm.org/PR20462 - http://llvm.org/PR20595 - Some vectorizer cleanups - http://llvm.org/PR20655 * Background (4/10) - Code review, meetings, discussions, etc. - Trying D01s again as buildbots == Plan == * Pick some more toolchain bugs to work on * Release 3.5 tests and benchmarks * Move bots to CMake, enable compiler-rt * Change compilation to make Clang/LLVM non-NEON by default * Enable D01s as buildbots

11 years, 4 months

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[ACTIVITY] Week 33

by Zhenqiang Chen

== Issues == * None. == Progress == * Update "Keep constants in register when expanding" patch according to comments (TCWG-486, 3/10). * Refine ccmp patches since the old ones can not apply (TCWG-488, 2/10). * Check PR62151, it was exposed by my commit r211885. But the root cause was r208165. * R/M toolchain related work (5/10) == Plans == * Ping pending patches. == Planed leaves == * Aug. 18 - 26.

11 years, 4 months

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configure: error: Link tests are not allowed after GCC_NO_EXECUTABLES

by Črt Gorup

Hi, I am trying to build a working environment with Angstrom Linux, QT5 for Toradex Apalis iMX6 module and additional QT5 SDK for my host machine. The compilation of Angstrom with additional QT5 layer went fine. However, there are some problems when building toolchain for the host machine (command meta-toolchain-qt5). It seems that there is a problem with configuration of linaro gcc runtime 4.8. The reported error is: "checking dynamic linker characteristics... configure: error: Link tests are not allowed after GCC_NO_EXECUTABLES". The log file is in the attachment. Does anyone have any idea how to fix this problem? I am using Ubuntu 14.04. Thanks in advance, Crt Gorup

11 years, 4 months

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Linaro arm-linux-gnueabihf-gdb versus Ubuntu gdb-multiarch

by ssinfod ssinfod

Hello, I'm trying to perform cross platform remote debugging from my x86 computer to a remote ARM device. (ex: Beagle Bone Black) I'm using Ubuntu 14.04 and Eclipse CDT. I installed the Ubuntu package gcc-arm-linux-gnueabihf but the gdb debugger is not in that package. Therefore, I'm wondering if I should use the Linaro toolchain (which include arm-linux-gnueabihf-gdb) or if I should install the Ubuntu gdb-multiarch package. What is the difference between gdb-multiarch and arm-linux-gnueabihf-gdb ? Is it better to use gdb-multiarch ? Thanks ssinfod

11 years, 4 months

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[ACTIVITY] 4 - 8 August 2014

by Omair Javaid

== Progress == BeagleBoard and Pandaboard setup for gdb testing [3/10] * Deployed debian linux on both boards * Installation of required packages for gdb testing * Run gdb native tests on Beagleboard, Pandaboard and Chromebook Arm gdb record-replay bug fix [6/10] [TCWG-314] * Applied previous asimd and vfp patches and test for failures * Fixed exception due to a bug in previous patches with latest trunk. * Fixed issues with solib trampoline code when stepping in reverse. Miscellaneous [1/10] * In pursuit of deploying linux on boards dd,ed my hard drive by accident and spent some time re-installing my desktop. == Plan == Arm record-replay bug fix [TCWG-314] * Test bug fixes with all previous patches and resubmit. Update and Submit Aarch64 record replay patches. Resume work on Aarch64 prologue analysis.

11 years, 4 months

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[ACTIVITY] 4th - 8th August 2014

by Bernie Ogden

=Progress= cbuild2 benchmarking- TCWG-360 [6/10] * Existed patches tidied up and gerritified * A few drive-by bugfixes * Cross-building support added and also gerritified lowlevellock patch [1/10] * Resubmitted bugfix, reacted to review * Some wrestling with space-mangling evil in mail clients Meetings/mail/etc [3/10] =Plan= Holiday Tuesday afternoon cbuild2 benchmarking * Get remote targets working * Maybe look at results gathering

11 years, 4 months

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[Weekly] 04-08 AUG 2014

by Michael Collison

== This week == * Linaro bugzilla 331 - [4.9 Regression] ICE in final_scan_insn, at final.c:2952 [4/10] - Triaged and investigating * Linaro bugzilla 307 - [Linaro 4.8] ICE in change_address_1, at emit-rtl.c:2019 [1/10] - Unable to validate. Further investigation before closing * TCWG-515 - Neon intrinsic bug testing [5/10] - Linaro Infrastructure headaches and setup. - May split into several blueprints targeting two to three tests - Require assistance debugging DejaGnu script error preventing some tests from running == Next week == - Continue with Neon intrinsic testing - Continue investigation into resolution for Linaro bugzilla 331

11 years, 4 months

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[ACTIVITY] Aug 4-10

by Rob Savoye

== Progress == * Fixed aarch64_be-none-elf builds and cross tests. (2/10) * Forked ancient RSH support in DejaGnu to be more SSH aware. SSH is now takes 1/4 of the time it used to for each remote execution test case. (TCWG 512 - 4/10) * Stabilized new ZSSH protocol in DejaGnu, also much faster than the current RSH/SSH support. (TCWG 512 - 3/10) * Meetings and Misc. (1/10) == Plan == * Get my D01 board working finally, since I killed my Odroid U2. * Review benchmarking patches. * Do more thorough testing of SSH performance improvements.

11 years, 4 months

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[ACTIVITY] 4 August - 8 August 2014

by Venkataramanan Kumar

== Progress == * TCWG-180 Debugging - LTO bootstrap failure in Aarch64 with GCC 4.9. (6/10) Tried to recompile object files that showed differences in GCC trunk on amd64 machine.It turned out that GCC make system always builds LTO files in “gcc” directory and uses prev-gcc/xg++ to build them. No differences when building stage2 and stage3 objects under same directory “gcc” in FSF trunk. Doing the same experiment with gcc 4.9 branch shows failure both in x86_64 and aarch64. Communicated the issue to Richard Beiner. Got some feedback on debugging from Honza and Richard. Tried passing –save-temps to BOOT_CFLAGS using FSF trunk, getting assembler errors. Need to come back to this problem after finding root cause. Read about LTO passes and wpa (partitioned ) vs non portioned mode. * Others (2/10) * Upstream patch review. * 1-1 Meeting Christophe. * Misc and internal meeting. * setup LLVM. * Friday off (2/10). == Plan == * Continue LTO bootstrap issue. * Benchmark Core mark with LTO. * Upstream patch review. == MISC == * National holiday on 15th August .

11 years, 4 months

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[ACTIVITY] 4 - 8 August 2014

by Kugan

== Progress == TCWG-445 - AArch64 does not generate post-decrement stores. * Issue resolved with Jiong's prologue/epilogue patch committed to trunk. * Closed the card. TCWG-291 - Zero/sign extensions (5/10) * More review and posted patch based on that which was accepted * Ran full set of validation (including s390x, aarch64 be, x86 and arm) * Committed two outstanding patches * Closed the card. TCWG-413 - Release benchmarking (2/10) * Benchmarking or release for a15 and a57 TCWG-468: Sha1 regress (2/10) * Experimented with back-end patterns. Not much improvement for the test-case. - Misc (1/10) * Looked at gcc bugs and closed old ones. * Posted test-case patch. == Plan == - Sha1 regressions - Fixing assigned Bugs

11 years, 4 months

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[ACTIVITY] Week 32

by Zhenqiang Chen

== Issue == * None. == Progress == * Refine and send the patch to fix pr61225 in Combine pass for review (2/10). * Send out the ARM backend patch to keep some constant in register (TCWG-486, 2/10). * Rebase and test ccmp related patches (TCWG-488, 2/10). * R/M toolchain related work (4/10). == Plans == * Ping pending patches. == Planed leaves == * Aug. 18 - 26.

11 years, 4 months

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[ACTIVITY] Week 32

by Renato Golin

* Benchmarks (CARD-716 3/10) - Working on Linaro's SPEC scripts for LLVM - Running SPEC2000 INT/FP (C/C++ only) on both ARMv7 and AArch64 - Re-writing some EEMBC scripts to be more stable - EEMBC reported some regressions from 3.4.2 - But still same when compared with GCC 4.8 (all in Jira) * Toolchain (CARD-862 3/10) - Fixing bugs in the assembler/libc++abi - http://llvm.org/PR20529 - http://llvm.org/PR20025 - Investigating other bugs in the assembler - http://llvm.org/PR18926 - http://llvm.org/PR20422 * LLVM 3.5 Release (TCWG-476 1/10) - Building and testing release candidate 2 * Background (3/10) - Code review, meetings, discussions, etc. - Buildbot failures - Plan for 2014 H2 - Basic LLD AArch64 support landed upstream == Plan == * Take actual holidays * Work on more assembler fixes * Finish SPEC runs, hopefully test last release candidate * Have a look at the bots, libraries, CMake, NEON, etc

11 years, 4 months

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[ACTIVITY] 4 - 8 August 2014

by Will Newton

== Progress == * Upstream work (2/10, CARD-341) - Patch review - Submitted a fix for armeb-eabi configurations of binutils - Tested and removed aarch64 lowlevellock.h - Tidied up glibc patchwork * Rewrote src-release as a shell script (4/10, TCWG-487) - Allows building releases as xz - 80% less evil than existing makefile * Booting upstream kernel on Chromebook (2/10) - Kernel configured and built - I think I have a plan... * Off Wednesday (2/10) == Issues == * None == Plan == * Upstream kernel on Chromebook * malloc app benchmarks * Potentially glibc 2.20 release week -- Will Newton Toolchain Working Group, Linaro

11 years, 4 months

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[ACTIVITY] 28 July - 1 August 2014

by Omair Javaid

== Progress == BeagleBoard and Pandaboard setup for gdb testing [1/10] * Got both alive and working with minimal os * Trying ubuntu prebuilt binaries didnt work. Out of office to get internet fixed and buy accessories for boards. [1/10] Eid Public Holidays in Pakistan from 29th July till 1st August [8/10] == Plan == BeagleBoard and Pandaboard setup * Get linux running on both boards * Run gdb test scripts on both boards * Compare test results outputs with chromebook and x86 Update and Submit Aarch64 record replay patches. Resume work on Aarch64 prologue analysis.

11 years, 4 months

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[ACTIVITY] 18 - 25 July 2014

by Omair Javaid

== Progress == GNU Tools Cauldron * Some useful corridor meetings with various GNU tools developers and maintainers. TCWG Sprint [8/10] * Got to meet the team and discuss TCWG roadmap. * Some useful howtos specially back porting and patch review howtos. * Sprint with ARM and useful discussions on gdb patch review. Return travel from UK on Friday 25th July.[2/10] == Plan == Get over travel fatigue and resume office. Get missing components and set up pandaboard and beagle board for gdb testing. Eid Public Holidays in Pakistan from 29th July till 1st August

11 years, 4 months

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[Activity] Mid July to now

by Rob Savoye

== Progress == * Installed dmucs on the TCWG build slaves, which works in DejaGnu to do cpu load based scheduling of executing cross tests remotely. (TCWG 511 - 4/10) * Spent some time trying to improve SSH performance for cross testing by opening the SSH connection via expect, and keeping it open. (TCWG 512 - 2/10) * Attended GNU Tools Cauldron and Linaro Sprint. (13/10) * Worked with Bernie on changes to the benchmarking branch. * Installed a Jenkins instance on my home server which uses my own build farm for testing Jenkins/Cbuildv2 changes without screwing up validation. (TCWG 1378 - 1/10) - Experimented with some new plugins that might be useful. (TCWG 1378 - 1/10) - Added command line options to jenkins.sh so it'll work on different Jenkins installations. * Fixed bare metal testing for arm*-none-eabi*. (2/10) * Fixed several Cbuildv2 bugs in bugzilla (TCWG 1378 - 2/10) - #167 - tcwgweb.sh not accurate. - #183 - cbuild2 configure --enable-bootstrap sets 'enable_bootstrap' not 'bootstrap'. - #249 - cbuild2.sh --help only works after configure is run * Reviewed and approved patches: - Add configure option to choose compiler languages - Enable parallelism by default - Add support for --march - Add support for --enable and --disable make_docs in configure and cbuild2.sh - lib/checkout.sh: Make checkout() dryrun safe when repodir doesn't yet exist - lib/stamp.sh: check_stamp() --force and --dryrun should return 1 - cbuild2.sh: Make --dump a do_ option so it's position doesn't matter - lib/make.sh: hello_world() will now return 1 if the compilation or link fails * Experiment with Docker to see if it has any advantages over a chroot, which it seems to. (2/10) * Refactor building binary tarballs. Now it doesn't run the test first, it assumes the branch has already been validated. (2/10) * Fix aach64_be-none-elf builds. == Plan == * Fix current breakage in cbuild2/master. * Get back to SSH performance improvements (TCWG 512). * Get my D01 board working finally, since I killed my Odroid U2. * Work through more cbuildv2 bug reports (TCWG 1378). == Issues == * Sorry, several weeks of status in one activity report, I need to get back to doing these weekly...

11 years, 4 months

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[ACTIVITY] 28 July - 1 August 2014

by Kugan

== Progress == - Travelling from TCWG sprint (2/10) - Zero/sign extension elimination (TCWG-291) 2/10 * Posted the modified patch and some discussions. Further testing. -SHA1 regression (TCWG-468) 4/10 * Looked at IRA's uses of back end cost model. It might be a limitation (See the notes below). Looking at the test-case from sha1 which also has inline asm whose constraints are causing further issues. - Misc (2/10) * Looked at bugs assigned (https://bugs.linaro.org/show_bug.cgi?id=85) * Set-up LLVM == Plan == - Sha1 regressions - Fixing assigned Bugs --------------------------------------------------------------------- In AArch64, some of the integer operations support “w” constraint (FP_REGS). For example *addsi3_aarch64 pattern supports it. However, not all of the integer operations supports it. In the cases where it is supported, all the operands have to be in FP_REGS and it will not work if we have one operand in FP_REGS and other in GENERAL_REGS. If there is an allocno whose pseudo register is used only in *addsi3_aarch64 insns, it will have low cost for register class FP_REGS (as in the case of a28 below exacted from an example). If the other pseudo register used in *addsi3_aarch64 (a27 in the example below) is also used in instructions (rorsi3_insn in the exaple below) that does not support “w” constraint, there is going to be a cost involved in moving it from FP_REGS to GENERAL_REGS (or other way) Currently IRA dosent seems to be considering this dependency in considering this inter dependency in cost calculation.

11 years, 4 months

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[ACTIVITY] 28th July - 1st August 2014

by Bernie Ogden

=Progress= cbuild2 benchmarking - TCWG-360 [7/10] * Integrated benchmarking more into the core of cbuild2 * 'Audited' the benchmarks lying around on toolchain64 * Persuaded cbuild2 to use git-over-ssh Meetings/mail/etc [3/10] =Plan= cbuild2 benchmarking * Convert eembc integration into reviewable patches * Get cross-compilation working * Get remote targets working

11 years, 4 months

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[ACTIVITY] 28 July - 1 August 2014

by Venkataramanan Kumar

== Progress == * TCWG-180 Debugging - LTO bootstrap failure in Aarch64 with GCC 4.9. (4/10) * TCWG-181 Rerun coremark with LTO on latest trunk and Linaro compilers. (1/10). * Others (3/10) * Upstream patch review. * Prepared and sent notes on cauldron. * 1-1 Meeting Christophe. * Misc and internal meeting. * setup LLVM. * Tuesday: Ramzan holiday (2/10). == Plan == * Continue LTO bootstrap issue. * Benchmark Core mark with LTO. * Upstream patch review. == MISC == * Leave on 8th August .

11 years, 4 months

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[Weekly] 28 July - 1 August 2014

by Michael Collison

== This week == * Neon intrinsic testing (4/10) - Patched sources with Christophe's patches - Ran Neon intrinsic tests for vclz and vqadd - Investigating regressions * On leave Monday and Tuesday; out sick Wednesday (6/10) == Next week == * Continued Neon intrinsic testing

11 years, 4 months

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[ACTIVITY] Week 31

by Zhenqiang Chen

== Issues == * None. == Progress == * Rework the patch to fix pr61225 in Combine pass. (4/10) * Investigate code-size regression when skipping arm_split_constant in expand (TCWG-486, 4/10). - For reg & 0xffff, zero_extendhi instruction is more efficient. - For "PLUS", the define_insn_and_split "*arm_addsi3" is only available when "reload_completed || !arm_eliminable_register (operands[1])". The cprop and combine passes can not recover it back when there is no chance to optimize the constant. * R/M toolchain related work (2/10). == Plans == * Send out the patches for review. * Refine ccmp related patches. == Planed leaves == * Aug. 18 - 22.

11 years, 4 months

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[ACTIVITY] Week 31

by Renato Golin

== Progress == * Toolchain (CARD-862 2/10) - Helping debug some sanitizer work - Re-evaluating compiler-rt on ARM with CMake * LLVM 3.5 Release (TCWG-476 2/10) - Working on SPEC to run with LLVM * Background (6/10) - Code review, meetings, discussions, patches, etc. - Email and patch backlog due to Cauldron and sprint - Investigating and fixing buildbot/build failures == Plan == * Finish SPEC-LLVM integration, run against 3.5 vs. 3.4.2 * Test Release Candidate 2, when it comes * Back to compiler-rt work...

11 years, 4 months

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[ACTIVITY] 28 July - 1 August 2014

by Will Newton

== Progress == * Various small tasks (3/10) - Catching up on email - Bug report investigations - Expenses from Cauldron/Sprint - Pushing patches - Tidy some JIRA cards * Investigated gdb testsuite failures on Chromebook (2/10) - Looks like a kernel issue, need to try a newer kernel on Chromebook * Investigated state of ARM and AArch64 glibc testsuites for 2.20 release (2/10) - Results look ok but a couple of things need investigation at some point * Triaged bugzilla bugs (1/10) * Built releases of binutils, eglibc and gdb for 2014.08 (2/10) == Issues == * None == Plan == * Get a newer kernel booting on Chromebook * Look at improving src-release for xz tarballs * Figure out what to do with glibc testsuite failures on AArch64 -- Will Newton Toolchain Working Group, Linaro

11 years, 4 months

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