- linaro-toolchain - lists.linaro.org

by Yvan Roux

== Progress == o Linaro GCC validation (8/10) * Reviewed, validated and committed more backports * New stability issues after executor number increased * Started to script branch merge * Developed a new tool to avoid wasting time in gerrit/jenkins/logs navigation o Upstream GCC (1/10) * Looked at and updated some bugzillas o Misc (1/10) * Various meetings == Plan == o Continue backports/validation/branch merge

9 years, 10 months

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[ACTIVITY] 31th Aug - 04th Sep

by Kugan

== Progress == * Widening pass (TCWG-547) – 6/10 - Looked at “Error: unaligned opcodes detected in executable segment” * Spent lot of time trying to understand the root cause. * Got some suggestions from Jim and looking into it. - Posted some of the important patches for review. * https://gcc.gnu.org/ml/gcc-patches/2015-09/msg00399.html * https://bugs.linaro.org/show_bug.cgi?id=1318 (2/10) - Tried reproducing with the source provided without success. - Could build and reproduce with emacs-24.4 release. - Trunk GCC version 6.0.0 20150902 works. - GCC version 4.9.3 20150209 (Linaro GCC 4.9-2015.02) fails. * Misc - 2/10 - gcc-patches, gcc-bugs list == Plan == * Continue with widening pass * Fix Bug1318

9 years, 10 months

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[ACTIVITY] 31st August - 4th September

by Bernie Ogden

Holiday [4/10] Multinode wrapper - TCWG-350 [2/10] * Merged to benchmarking branch, roughly documented * Tested & added job definition templates Setting up VPN [2/10] * Much struggling with mutt, pgp, VM vs real system, Mac vs Linux * Still not working, but wrote up what I've learned on the Collaborate page Misc [2/10] * ARM admin, meetings, mail, etc etc =Plan= Last pass through benchmarking presentation Finish multinode/updating benchmarking docs Back to Juno noise control experiments Back to Jenkins - get it to drive multinode

9 years, 10 months

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[ACTIVITY] 24th - 28th August

by Bernie Ogden

(Reporting with new Jira numbers) Holiday [6/10] Investigate effectiveness of noise control - TCWG-358 [2/10] * Learned to build OE filesystems * Got Juno running with more or less provenance-tracked firmware, kernel, filesystem Misc - [2/10] * Pushed through some updates to benchmark sources * Struggled with Collaborate permissions to share source/results handling rules * Remaining multinode tests passed

9 years, 10 months

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[Weekly] 31 AUGUST - 04 SEPTEMBER 2015

by Michael Collison

== This week == * TCWG-832 -Exploit vector multiply by scalar instructions when multiple scalars are used as coefficients in a loop (4/10) - Continued investigation. * TCWG-833 - Exploit Wide Add operations when appropriate (4/10) - Reworked Aarch64 patch to avoid redundant moves - Sent patch upstream for review - Debugging Aarch64 tree-dump regression suite failures - Bugzilla 57195 (mode iterator bug) blocked compiling new pattern (1/10) - Separated patch from Bugzilla 67321 patch and sent upstream - Pinged upstream for comments * Misc (1/10) - Conference calls == Next week == - USA Labor day holiday, September 7th - Additional investigation into TCWG-832

9 years, 10 months

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[ACTIVITY] 31st August - 04 September 2015

by Prathamesh Kulkarni

== This Week == * TCWG-120 (8/10) - Resolved df issue in my patch, sent to tcwg list for review, - VRP makes the issue latent at -O2. Reproducible with -fno-tree-vrp - Taking another approach to run a "specialized" combine pass before combine pass that folds arm_andsi3_insn/arm_cmpsi_insn to zeroextracsi_compare0_scratch or andsi3_compare0_scratch without relying on combine. Patch: http://pastebin.com/gLVg7pbN Asm diff at -O1: http://pastebin.com/yXBHHkhM Asm diff at -O2 -fno-tree-vrp: http://pastebin.com/EKj6hXkt * Misc (2/10) - Meetings - Had a look at vect test-cases failing due to LTO == Issues == - No access to Juno - Can't login to IRC via ZNC (can connect directly). == Next Week == - Continue with TCWG-120 - Start looking at TCWG-80

9 years, 10 months

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[ACTIVITY]

by Renato Golin

== Progress == * Holidays (4/10) * Buildbots (2/10) - Several breakages, Clang alignment issue sill breaking self-hosted bots... * Maintenance (2/10) - Backtracks on the TargetParser, code heavily modified, discussions ensued. - Helping Vinicius with __aeabi_memcpy in the kernel * Releases (0/10) - Release 3.7.0 final validated / uploaded - Waiting for final switch * Background (2/10) - Code review, meetings, discussions, etc. - Backlog of emails, reviews == Plan == Look at libc++ / RT / unwind again see if I can reduce the errors in both AArch64 and ARM to zero. == Issues == The power cuts and the effect it had on my buildbots made me spend 3 days of my holidays to fix. Other buildbot breakages made me spend another 2, and I couldn't wait until I was back, or it would have wasted an entire week (as it has happened before). In a nutshell, I can't have holidays. Yay!

9 years, 10 months

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[ACTIVITY] 31th Aug - 04th Sep

by Yao Qi

# Progress # * Holiday on Monday [2/10] * TCWG-857, [4/10]. All the multi-arch work are done (I hope) but patches can't be sent out until kernel patches are pushed in upstream. ** Collect some arguments from kernel folks to defend my change "32-bit CPSR to 64-bit PSTATE". Patch is posted out. ** Finish the patch to convert siginfo_t between 32-bit debuggee and 64-bit debugger. Done. Will post it next week. ** Get right TLS base in multi-arch debugging. Patch is done. * Happen to see we can improve GDB performance in some case by avoid sending some packets. Patch is done, but need to collect some performance data. [2/10] * Misc [1/10] ** Close some tickets, TCWG-567, TCWG-876, as they are done. * TCWG-757 [1/10], many patches review. # Plan # * Continue to upstream multi-arch patches. * Upgrade my juno board kernel to git master to test kernel patches for multi-arch debugging work properly. * Collect some GDB performance data for my patch. -- Yao

9 years, 10 months

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Odd Linaro GCC 4.8 2015.06 behavior with precompiled headers

by Dragan Stancevic

Hi- It seems that there is some discrepancy between Linaro GCC 4.8 2015.06 and Linaro GCC 4.8 2014.11 with regards to precompiled headers. It appears that 2015.06 doesn't even attempt to open the precompiled headers according to strace. I have been looking on gcc mailing list but have not been able to find any fixes related to precompiled headers. Does anyone have any pointers as to what should I be looking at to get to the bottom of this issue? This simple program compiles without any problems on 2014.11, but fails on 2015.06 because 2015.06 doesn't even attempt to read tst.h.gch created by "make header" dragans@tst:~$ cat Makefile PROJ=tst CC=arm-linux-gcc LD=arm-linux-ld all: header $(PROJ) header: $(PROJ)._ cp $(PROJ)._ $(PROJ).h $(CC) -x c-header -c $(PROJ).h $(PROJ): $(RM) $(PROJ).h $(CC) $(PROJ).c -o $(PROJ) clean: $(RM) $(PROJ).h.gch $(PROJ).h $(PROJ) dragans@tst:~$ cat tst._ #include <stdio.h> dragans@tst:~$ cat tst.c #include "tst.h" int main(int argc, char**argv) { char *s = "Test"; printf("%s\n", s); return 0; }

9 years, 10 months

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[ACTIVITY] 24 - 28 August 2015

by Omair Javaid

== Progress == LLDB development -- Testing and bug fixing lldb on hikey AArch64 [TCWG-886] [7/10] -- Improve error handling of AArch64 watchpoint code. Submitted, got reviewed and committed http://reviews.llvm.org/D12328 -- Looked into ways to improve watchpoint installation lag. -- Looked into issues pertaining to un-alligned watchpoints installation. -- Committed upstream arm hardware breakpoint and watchpoint support [TCWG-770] [TCWG-794] [1/10] -- Ran lldb testsuite in various combinations to figure out Arm and AArch64 status [1/10] -- Testing on chromebook with precise chroot works. Miscellaneous [1/10] -- Meetings, emails, discussions etc. == Plan == LLDB development -- Try to find ways to debug lldb-server platform forked gdbserver instance. -- Test, debug and fix testsuite failures on Arm and AArch64.

9 years, 10 months

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[ACTIVITY] 17 - 21 August 2015

by Omair Javaid

== Progress == LLDB development -- Testing and bug fixing lldb on hikey AArch64 [TCWG-886] [2/10] -- Looked into watchpoint tests which are still failing after committing watchpoint support and bug fixes. -- Modifications to arm hardware breakpoint and watchpoint support [TCWG-770] [TCWG-794] [7/10] -- Resubmitted the pending patch http://reviews.llvm.org/D9703 -- Testing on chromebook with precise chroot works. Miscellaneous [1/10] -- Meetings, emails, discussions etc. -- Looking into slow data transfer issues on chromebook and highkey board == Plan == LLDB development -- Get patches reviewed and committ them. -- Continue looking into tests which are still failing on Arm and AArch64 -- Run test comparison between linux x86, android arm and linux arm

9 years, 10 months

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[ACTIVITY] Week 3

by Yvan Roux

o 3 days off (6/10) == Progress == o Linaro GCC validation (3/10) * Reviewed, validated and committed on-going backports * backported more revisions o Misc (1/10) * Various meetings == Plan == o Continue backports/validation

9 years, 10 months

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[ACTIVITY] 24th - 28th August

by Kugan

== Progress == * Annual Leave (2/10) * Widening pass (TCWG-547) - 6/10 - Fixed all execution test failure. - bootstrap failure due to “Drop copy-rename” is still not resolved. Found a workaround. - Sorted debug_stmt handling * TACT 1/10 - Started looking to cross execution set-up * Misc - 1/10 - gcc-patches, gcc-bugs list == Plan == * Continue with widening pass

9 years, 10 months

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[activity] 24-49 August

by Prathamesh Kulkarni

== This Week == * TCWG-777 (3/10) - Fixed ICE with the patch - toolchain builds with the patch. - Sent patch to tcwg list for review - Investigating why combine fails to combine arm_andsi3_insn/arm_cmpsi_insn into zeroextractsi_compare0_scratch when the pass uses ud-chains to find def but works when def is found using ad-hoc way. * TCWG-871 (4/10) - Getting familiar with firefox build system - LTO build lto/non-lto on x86 and arm (doc) - Figuring out how to resolve "plugin needed to handle lto object" error. tried the following: binutils configured with: --enable-plugin, --enable-lto gcc configured with: --enable-lto --with-ld-plugin=<just built ld> Doesn't appear to work. * TCWG-835 (1/10) - Build failure with spec (PR67399) * Misc (2/10) - Meetings - Looked at rtl dataflow (df.h and df*.c) and ree.c == Next Week == Continue with TCWG-777, TCWG-835, TCWG-871

9 years, 10 months

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[Weekly] 24-28 AUGUST 2015

by Michael Collison

== This week == * TCWG-832 -Exploit vector multiply by scalar instructions when multiple scalars are used as coefficients in a loop (2/10) - Initial investigation. * TCWG-833 - Exploit Wide Add operations when appropriate (4/10) - Ramana is reviewing Aarch32 patch - Recoded Aarch64 support to use vect_select - Debugging Aarch64 lto, tree-dump regression suite failures * TCWG-834 - Use non-unit stride loads by preference when applicable (1/10) - TCWG 834 is Bugzilla 67323 upstream; Richard Biener took ownership as a vectorizer failure - My plan was to write a test case that failed until fixed, but Richard indicated this is not standard practice - Bugzilla 57195 (mode iterator bug) blocked compiling new pattern (1/10) - Separated patch from Bugzilla 67321 patch and sent upstream - Pinged upstream for comments - Bugzilla 67320 - Incorrect standard names for wide addition (1/10) - committed upstream in trunk * Misc (1/10) - Conference calls == Next week == - Resolve Aarch64 TCWG-833 patch, validate and upstream - Additional investigation into TCWG-832

9 years, 10 months

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[ACTIVITY] 24th - 28th August

by Charles Baylis

Bug 1764/PR67280 C++ wrong code bug (no card yet) [9/10] Misc [1/10]

9 years, 10 months

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[ACTIVITY] 17th - 21st August

by Charles Baylis

Holiday [2/10] Bug 1764/PR67280 C++ wrong code bug (no card yet) [4/10] Misc [4/10]

9 years, 10 months

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[ACTIVITY] 24th - 28th August

by Yao Qi

# Progress # * TCWG-857 [3/10] With one kernel fix, HW breakpoint works for unaligned address (2-byte aligned). Debug linux kernel with KGDB. KGDB exposes an existing GDB bug, I fixed it, but need some time thinking about how to submit it upstream. * TCWG-567, arm watchpoint fixes [4/10]. All fails are fixed, but need another round of test to confirm. ARM HW watchpoint doesn't work on 4.0.0 kernel, but I don't investigate on it. * TCWG-757 [2/10], some patches review. * Misc, meeting, [1/10] # Plan # * TCWG-857. * Upstream the leftover of aarch64 multi-arch patches. -- Yao

9 years, 10 months

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[ACTIVITY] Week 34

by Yvan Roux

== Progress == o Linaro GCC validation (9/10) * Analysed x86_64 fstack-protector and sse2 issue * This is due to "ulimit -v" usage which brakes asan testing and gcc testsuite caching mechanism. * Validation is now stable on Hetzner/Austin hardware * Documented summer validation issues * Validate and committed on-going backports o Upstream GCC (0/10) * Armeb OOM fix committed into gcc-5 o Misc (1/10) * Various meetings == Plan == o 3 days off o Continue backports/validation

9 years, 10 months

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[ACTIVITY] 17th - 21st August

by Kugan

== Progress == * Widening pass (TCWG-547) - 8/10 - Fixed all but one execution test failure. - aarch64 and x86 are clean - arm has one but this looks like a latent issue (in expand); looking into it - Latest trunk with aarch64 miscompiles stage2 fwprop (-fno-forwprop works). This happens with the commit 94f92c36a83d66a893c3bc6f00a038ba3dbe2a6f [PR64164] Drop copyrename, use coalescible partition as base when optimizing - Tried forcing the same promote_mode for x86_64 and can reproduce it with x86_64 also. - Looking into it to see if this is an error with the commit * Misc - 2/10 - gcc-patches, gcc-bugs list == Plan == - Continue with widening pass

9 years, 10 months

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[ACTIVITY] 17th - 21st August

by Bernie Ogden

Upcoming Absences * Away from this Wednesday until next Tuesday, inclusive Benchmark infrastructure - TCWG-360 [1/10] * Finished filling out cards/bugs for benchmarking work * Which makes the rest of this report more fine-grained Multinode wrapper - TCWG-888 [2/10] * Completed oversubscription workaround * Herded most tests through * Uncovered one significant bug, seems fixed Centralized source/results storage - TCWG-722 [1/10] * Wrote draft of source/results handling rules * Confirmed that old repos are subsets of new repos Noise control experiments - TCWG-897 [2/10] * Learned more about firmware, openembedded * Juno running a minimal filesystem, needs some tidying up Misc [4/10] * Including a further 1/10 of ARM management =Plan= * Herd remaining multinode tests through ** Depends on LAVA lab coming back from power cut ** And queues being short enough * Progress (finish?) Juno bring-up * Share source/results rules draft

9 years, 10 months

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[Weekly] 17-21 AUGUST 2015

by Michael Collison

== This week == * TCWG-833 - Exploit Wide Add operations when appropriate (8/10) - Reworked patch to use vect_select instead of unspec as requested by Ramana - Bugzilla 57195 (mode iterator bug) blocked compiling new pattern - Created patch which successfully bootstrapped - Created Bugzilla 67320 - Incorrect standard names for wide addition (documentation bug) - Successfully regression tested Aarch32 changes - Send Aarch32 patch upstream for review - Reworking patch for Aarch64 to use vect_select as well - Created Bugzilla 67321 - [ARM] Exploit wide adds when appropriate - Created Bugzilla 67322 - [Aarch64] Exploit wide adds when appropriate * TCWG-834 - Use non-unit stride loads by preference when applicable (1/10) - Created Bugzilla 67323 to track until fixed in GCC 6 by Richard Biener - Began writing test case that fails * Misc (1/10) - Conference calls == Next week == - Respond to Aarch32 TCWG-833 upstream requests and hopefully check-in patch - Complete Aarch64 TCWG-833 patch, validate and upstream - Finish testcase for TCWG-834 and submit upstream

9 years, 10 months

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[ACTIVTY]

by Renato Golin

== Progress == * Maintenance (CARD-1833 2/10) - Fixing libc++abi build on AArch64 - Trying to remove a hack in ARMTargetInfo about default CPUs - Bisecting PR24292 - Working with ARM to fix it, backport * Buildbots (CARD-1823 8/10) - Working with Adhemerval on VMA 42bits sanitizer - Setting up a libc++ "full" build on the second stage, since gcc can't build it yet. 171 tests fail. - Ubuntu Vivid (39-bits VA / 4k pages) with Uboot is the winner of stability, speed and easiness. - Power outage meant I had to unbreak *a lot* of broken stuff * Background (2/10) - Code review, meetings, discussions, etc. - Some Android/TSAN/AArch64 shenanigans == Plan == Holidays all week == Issues == Yes, it does add up to 12/10, since I had to work most of Saturday and some of Sunday to fix the mess that the power cuts made on our lab. If we had generators, that wouldn't have happened.

9 years, 10 months

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[activity] 17-21 August 2015

by Prathamesh Kulkarni

== This Week == * TCWG-835 (2/10) - Testing on SPEC CPU2006 - Found ICE while testing on spec unrelated to my patch, created reduced test-case. * TCWG-777 (2/10) - Working on RTL pass - enhanced it so it only replicates insn when required. - Prototype patch works for the test-case but ICE's during toolchain build. - Trunk generates expected output for -O2, git-bisect shows from r226516 * TCWG-871 (1/10) - Built for x86_64 non LTO - Trying to cross compile for ARM * Sick Leave (2/10) * Public Holiday (2/10) * Misc (1/10) - Meetings == Next Week == - Continue with TCWG-777, TCWG-835, TCWG-871

9 years, 10 months

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[ACTIVITY] 17-21 August 2015

by Christophe Lyon

== Progress == == Next == * GCC (4/10) - AdvSIMD failures on aarch64_be. Struggling with vectorizer regressions. * Releases/snapshots/validation (3/10) * Misc (3/10) - meetings, conf-calls, emails == Next == * GCC aarch64_be AdvSIMD * Validation / reviews / backports

9 years, 10 months

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