[ACTIVITY] Weekly report for week 50
=== Work done during the last week === * LLVM-432 (Support arithmetic on FileCheck regex variable): in progress + finished cleaning up code + rebase on top of trunk + fix all issues discovered with check-all + add detection of conflict between numeric variable and pattern variable + add memory management (yay for shared_ptr) * GNU-593 (Tied softfloat mul and div): upstream review + search for a non-elf arm target -> none seems supported * Fix issues with -mslow-flash-data: committed + finish testing patch for big endian and respond to upstream comments * GNU-598 (Do not select hardfloat when targeting Thumb-1 with mfpu set): upstream review + write and test patch, submit upstream * GNU-597 (pr77904.c test failure): upstream review + Investigate whether code added for PR77904 should be kept + test and submit patch for external review === Plan for week 51 === * DSGHACK-25 (Support arithmetic on FileCheck regex variable): + extend testcase coverage (add tests for latest syntax change and add more negative testing) + clean up the code written last week + improve documentation * Tied softfloat mul and div: + get it committed * GNU-598 (Do not select hardfloat when targeting Thumb-1 with mfpu set): + get it committed * GNU-597 (pr77904.c test failure): + get it committed * Try to reproduce perf issue mentioned in week #30's weekly report on latest perf ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 49
=== Work done during last week === * DSGHACK-25 (Support arithmetic on FileCheck regex variable): + simplifies how numeric expression are matched and checked, easier to explain too + start code cleanup and increasing testing, ETA: end of next week * Line management. === Plan for week 50 === * DSGHACK-25 (Support arithmetic on FileCheck regex variable): + extend testcase coverage (add tests for latest syntax change and add more negative testing) + finish cleaning up the code + improve documentation * Try to reproduce perf issue mentioned in week #30's weekly report on latest perf * Line management ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for weeks 47 & 48
=== Work done during the past 2 weeks === * GNU-296 (Fix stack protector on ARM): committed! * LLVM-432 (Support arithmetic on FileCheck regex variable): + finished reworking parsing code to be separate from evaluation and support more complex expression + fix compile errors and bugs found when running tests added to check feature * Write patch to diagnose error when compiling Armv8-M Baseline CMSE code with -mfpu -> as unintended consequence, needs rewrite * Wrote and committed patch to improve comments for some data structure in ld * Misc: + various meeting about my departure from Arm & Linaro === Plan for week 49 === LLVM-432 (Support arithmetic on FileCheck regex variable): + extend testcase coverage (add tests for latest syntax change and add more negative testing) + clean up the code + improve documentation * Try to reproduce perf issue mentioned in week #30's weekly report on latest perf * Line management: + continue progress on rotations ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for weeks 45 & 46
=== Work done during the past 2 weeks === * Resurrect code size optimization for fmul/dmul from Tony Wang: bootstraping + rework slightly to better deal with switch of section and deal with several possible section layout + start anew with a new approach based on symbol visibility -> works without -gc-sections and does not rely on section layout * Fix -mslow-flash-data: ready to upstream on Monday + some more cleanup and code improvement * LLVM-432 (Support arithmetic on FileCheck regex variable): + started reworking parsing code to be separate from evaluation and support more complex expression * Infrastructure code review === Plan for week 47 === * LLVM-432 (Support arithmetic on FileCheck regex variable): + extend testcase coverage (add tests for latest syntax change and add more negative testing) + finish cleaning up the code * Try to reproduce perf issue mentioned in week #30's weekly report on latest perf * Line management. ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 44
=== Work done during the past week === * Resurrect code size optimization for fmul/dmul from Tony Wang: + clean up new testsuite directive andd testcases * Fix -mslow-flash-data: + resurrect / rebase Arm internal patch to fix -mslow-flash-data once and for all + many fixes to make it pass all testsuite with -mslow-flash-data without ICE * Line management. === Plan for week 45 === * LLVM-432 (Support arithmetic on FileCheck regex variable): + extend testcase coverage (add tests for latest syntax change and add more negative testing) + finish cleaning up the code * Try to reproduce perf issue mentioned in week #30's weekly report on latest perf ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 43
=== Work done during this past week === * GNU-296 / GCC PR85434 / CVE-2018-12886: upstream review + avoid useless cmp after eors + fix another missing earlyclobber + full Thumb-1, Thumb-2 and Arm bootstrap with testing with and without -fPIC, with and without -fstack-protector-all * Continue patch to further update cpus and architectures in bfd: external review + also teach GAS about Armv5TEJ and newer wrt. bfd architectures tags + fix ld action in run_dump_test + add testing for all this and submit for external review * Resurrect code size optimization for fmul/dmul from Tony Wang: + rebase on trunk * Line management === Plan for week 43 === * LLVM-432 (Support arithmetic on FileCheck regex variable): + extend testcase coverage (add tests for latest syntax change and add more negative testing) + finish cleaning up the code * Try to reproduce perf issue mentioned in week #30's weekly report on latest perf * Line management ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 42
=== Work done during this past week === * GNU-296 / GCC PR85434 / CVE-2018-12886: + few more issues fixed and associated testing + now also running Thumb-1 bootstrap and testing * Prepare patch to further update cpus and architectures in bfd * Line management === Plan for week 43 === * GNU-296 / GCC PR85434 / CVE-2018-12886: + finish testing, and submit new stack protector patch for upstream review * LLVM-432 (Support arithmetic on FileCheck regex variable): + extend testcase coverage (add tests for latest syntax change and add more negative testing) + finish cleaning up the code * Try to reproduce perf issue mentioned in week #30's weekly report on latest perf * Line management ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 41
=== Work done during this past week === * TCWG-1428 (Support arithmetic on FileCheck regex variable): + continued cleaning up code and painfully rebased it on recent trunk * GNU-296 / GCC PR85434 / CVE-2018-12886: + fixed changes to routines for PIC access to use specified register + fixed 2 more issues in stack protector new instruction patterns + testing for arm and thumb2, now starting over due to one of the above issues * GNU-580 / PR86968: in progress + investigate, try 2 approaches, need to start looking into 3rd approach * Line management. === Plan for week 42 === * GNU-296 / GCC PR85434 / CVE-2018-12886: + finish testing, and submit new stack protector patch for upstream review * TCWG-1428 (Support arithmetic on FileCheck regex variable): + extend testcase coverage (add tests for latest syntax change and add more negative testing) + finish cleaning up the code * GNU-580 / PR86968: in progress + attempt 3rd approach * Try to reproduce perf issue mentioned in week #30's weekly report on latest perf * Line management: + continue progress on rotations + start preparing first AFDS ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 40
=== Work done during this past week === * One day annual leave * TCWG-1428 (Support arithmetic on FileCheck regex variable): + started cleaning up code and continued adding support for last syntax tweaks * TCWG-1379 / GCC PR85434 / CVE-2018-12886: rework needed + After more testing committed fix for register allocator and reverted following regression + fall back to workaround as register allocator lack information to decide whether it's safe to not reload an address + start testing workaround more extensively * TCWG-1470 / PR87374: upstream review + add missing documentation, improve related code slightly, submit for external review again Misc: + bits of line management + Doughnut session on OSS strategy + discussion around JIRA use in TCWG === Plan for week 41 === * TCWG-1379 / GCC PR85434 / CVE-2018-12886: + finish testing, and submit new stack protector patch for upstream review * TCWG-1428 (Support arithmetic on FileCheck regex variable): + finish change to support last syntax changes + extend testcase coverage (add tests for latest syntax change and add more negative testing) + start cleaning up the code * Try to reproduce perf issue mentioned in week #30's weekly report on latest perf * Line management ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 37 to 39
=== Work done during these past 3 weeks === * DSGHACK-25 (Support arithmetic on FileCheck regex variable): + all my tests pass, started to implement further minor changes to the syntax * PR87374: external review + investigate bug, write patch, test it and send for external review * GCC PR85434 / CVE-2018-12886: rework needed + Approved upstream but found when doing last minute testing after rebase + Testing on a wide number of targets a patch to register allocator to properly ignore some operand when told to * Linaro Connect Vancouver 2018 + prepare talk, attend event and write up reports * Regression testing of LLVM release: + extend script to do a LLVM release to be able to build from an arbitrary branch + make weekly regression build from trunk + fix here-doc in regression job to test release when scripts it use change Misc: + bits of line management + catching up on emails === Plan for week 40 === * GCC PR85434 / CVE-2018-12886: + finish testing, and get both register allocator fix and stack protector fix committed * PR87374: external review + add documentation and send back for external review * DSGHACK-25 (Support arithmetic on FileCheck regex variable): + finish change to suport last syntax changes + extend testcase coverage (add tests for latest syntax change and add more negative testing) + start cleaning up the code * Try to reproduce perf issue mentioned in week #30's weekly report on latest perf * Line management ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 36
=== Work done during this 3-day week === * TCWG-1428 (Support arithmetic on FileCheck regex variable): + continue to rework patch, feature complete and most testcase pass + sent another external email to hammer a few details * Arm new starter welcome and related faff * GNU Tools Cauldron + travel from Thursday to Sunday === Plan for week 37 === * TCWG-1428 (Support arithmetic on FileCheck regex variable): + fix last bugs, start testing and cleanup * Try to reproduce perf issue mentioned in week #30's weekly report on latest perf ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 35
=== Work done during this week === * TCWG-1379 / GCC PR85434 / CVE-2018-12886: rework needed + finished testing and submitted for external review * TCWG-1428 (Support arithmetic on FileCheck regex variable): address comments + continue to rework patch * Regression testing of LLVM release process: + Add support to build from a branch (incl. trunk) + Make weekly regression testing from trunk + start enabling regression testing of Linaro LLVM release process when scripts it use change * Prepare for becoming a line manager next week === Plan for week 36 === * Welcome new starter * Finish enabling regression testing of Linaro LLVM release process when scripts it use change * DSGHACK-25 (Support arithmetic on FileCheck regex variable): address comments + continue to rework patch * Try to reproduce perf issue mentioned in week #30s weekly report on latest perf ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 34
Note: annual leave tomorrow and Friday, as per my calendar === Work done during 3-day week === * TCWG-1379 / GCC PR85434 / CVE-2018-12886: rework needed + fix 2 more issues with retesting each time * More knowledge transfer within Arm (writing a script to automate manual task in GNU Arm Embedded Toolchain release to allow others to do it) * TCWG-1428 / DSGHACK-25 (Support arithmetic on FileCheck regex variable): address comments + continue to rework patch * Enable weekly regression testing of LLVM release process jenkins job * 2 days off annual leave === Plan for week 35 === * Enable regression testing of Linaro LLVM release process when scripts it use change * TCWG-1428 / DSGHACK-25 (Support arithmetic on FileCheck regex variable): address comments + continue to rework patch * TCWG-1379 / GCC PR85434 / CVE-2018-12886: rework needed + submit for external review * Try to reproduce perf issue mentioned in week #30s weekly report on latest perf ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 33
Note: I'll be on holidays Thursday and Friday next week. === Work done during 3-day week === * TCWG-1379 / GCC PR85434 / CVE-2018-12886: rework needed + heavy testing * TCWG-1337 / LLVM PR34170: get backport to LLVM 7 branch * create design review for -mfpu=auto option in GAS -> https://confluence.arm.com/display/CTP/Auto+FPU+for+GNU+as * Knowledge transfer within Arm * Misc: + GCC Linaro sync * 2 days off taking care of my feverish child === Plan for week 34 === * Enable regression testing of Linaro release process * TCWG-1428 (Support arithmetic on FileCheck regex variable): address comments + continue to rework patch * TCWG-1379 / GCC PR85434 / CVE-2018-12886: rework needed + investigate aarch64 glibc regression * Try to reproduce perf issue mentioned in week #30s weekly report on latest perf ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 32
=== Work done during this week === * TCWG-1379 / GCC PR85434 / CVE-2018-12886: rework needed + fix issues seen on x86_64 and start a bigger round of testing * TCWG-1337 / LLVM PR34170: last patch committed to trunk + address review comments and commit it once approved, then request backport to LLVM 7 branch * Submit and commit patch to clarify what tm.texi needs copying when tm.texi.in is updated in source tree * Misc: + Linaro syncs + 2 days and a half of Linaro JIRA gardening === Plan for week 33 === * Enable regression testing of Linaro release process * DSGHACK-25 (Support arithmetic on FileCheck regex variable): address comments + continue to rework patch * GCC PR85434 / CVE-2018-12886: rework needed + confirm all regressions are fixed + finish testing and submit for review * Try to reproduce perf issue mentioned in week #30s weekly report on latest perf ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 31
=== Work done during this week === * TCWG-1379 / GCC PR85434 / CVE-2018-12886: rework needed + commit and revert due to regression on x86 and in glibc for aarch64 -> seems there is at least 2 issues, *sigh* * TCWG-1337 / LLVM PR34170: + track down and fix issue that patch 2/3 uncovered, then reapply 2/3 + investigate regression from patch 1/3, fixed by patch 3/3 fortunately and believe this is the right fix * Continue work on TCWG-1428 (Support arithmetic on FileCheck regex variable): + start rework patch to follow new syntax and accept numeric expressions with several variables * Linaro PR3943: + investigate issue, propose several workarounds to customer and raise need for GCC release with combined multilib * Misc: + Linaro syncs + bits of Linaro JIRA gardening + new ask question button and typo fix on developer.arm.com's GNU RM page + prepare Linaro Connect === Plan for week 32 === * Summarize state of GNU EPIC in JIRA * Enable regression testing of Linaro release process * DSGHACK-25 (Support arithmetic on FileCheck regex variable): address comments + continue to rework patch * GCC PR85434 / CVE-2018-12886: rework needed + investigate regressions * Try to reproduce perf issue mentioned in last weekly report on latest perf ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 30
=== Work done during this 4day week === * Continued looking into MCF branch prediction overload due to too many consecutive branches: + managed to get reproducible results -> was missing --buildid-dir option when invoking perf -> above flag seems ignored if a binary with same path exists where the initial binary was built + rerun again sampling only one event to confirm I get # of samples * sampling freq = run time -> conclusion: LLVM as good as GCC for SPEC2006 MCF, profile different because LLVM inlines one of the hot functions * GCC PR85434 / CVE-2018-12886: upstream review + finish testing and submit for external review * LLVM PR34170: + address comments and commit once approved -> most build bot failed to run the test the commit added, got reverted before I could + investigate test failure -> does not fail when LLVM compiled with GCC or in Debug mode * Continue work on DSGHACK-25 (Support arithmetic on FileCheck regex variable): + hammer out syntax based on upstream feedback about what would be desirable as FileCheck expressions * Misc: + Linaro LLVM buildbot babysitting + upstream code review * One day off on Friday === Plan for week 31 === * TCWG-1428 (Support arithmetic on FileCheck regex variable): address comments + rework patch once syntax is agreed * Track down what causes testcase added for patch 2/3 for LLVM PR34170 * Try to reproduce perf issue mentioned above on latest perf ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 29
=== Work done during this 4.5day week === * TCWG-1062 (MCF branch prediction overload due to too many consecutive branches): + rework reproduction steps around an existing script that does all the steps of downloading and installing the benchmark and run it under perf + gather what was observed that triggered the ticket I'm working on -> narrowed down to 2/3 functions to be on the lookout + benchmark GCC and LLVM and compare the profile for these functions -> bingo, I can see a branch issue + try to get assembly files to add nop and test performance again -> code in assembly file is different from output of perf report, need to rerun benchmark again to make sure I didn't fail there (sigh) * TCWG-1379 / GCC PR85434 / CVE-2018-12886: upstream review + reply to upstream review comments + start to test tightening predicate for new instruction pattern -> weird build error when trying to bootstrap unrelated to my changes (missing header issues in stage 1 libgcc build) * TCWG-1337 / LLVM PR34170: + respond to upstream review comments * Continue work on TCWG-1428 (Support arithmetic on FileCheck regex variable): + hammer out syntax based on upstream feedback about what would be desirable as FileCheck expressions * Misc: + Linaro LLVM buildbot babysitting + Arm internal presentation * Half a day off on Friday === Plan for week 30 === * TCWG-1428 (Support arithmetic on FileCheck regex variable): address comments + rework patch once syntax is agreed * TCWG-1062 (MCF branch prediction overload due to too many consecutive branches): + find out why assembly file from -save-temps is different from perf report output + check performance when adding padding + start to investigate a solution ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 28
=== Work done during this week === * Continue work on TCWG-1428 (Support arithmetic on FileCheck regex variable): external review + finish adding comments + add documentation and testcase + respond to feedback and send email to llvm-dev to discuss best syntax for new feature * Started looking into TCWG-1062 (MCF branch prediction overload due to too many consecutive branches): + figure out what machines to run spec on, where to find spec and how to use Linaro scripts to install/configure and run it (thanks to Christophe Lyon) + try to build a native clang toolchain but throw it away since clang does not link (perhaps due to lack of memory (4G machine)) + learn how to build a cross LLVM toolchain (thanks to Peter Smith) + figure out how to get the right privilege to run perf (thanks to Christophe Lyon) * Misc: + LLVM buildbot babysitting with Peter Smith + attend presentation about Windows on Arm + start a full reorganization of my workflow + finish handover of my Arm tickets === Plan for week 28 === * DSGHACK-25 (Support arithmetic on FileCheck regex variable): address comments + rework patch once syntax is agreed * Continue looking into MCF branch prediction overload due to too many consecutive branches: + reproduce/confirm issue + start to investigate a solution ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 27
=== Work done during this week === * PR85434 / CVE-2018-12886 / TCWG-1379 (stack-protector failure on GCC ARM): external review + finish testing and patch clean up (comments + changelog) and submit for external review * Continue work on TCWG-1428 (Support arithmetic on FileCheck regex variable): + finish implementation, fix compile issues and debug errors found on simple testcase + run regression testsuite and fix another issue + start cleaning up patch * Misc improvement to jenkins infrastructure * Misc: + gave presentation on stack protector bug https://docs.google.com/presentation/d/1ksqK-eTYjYhFXlTyVaPA2VIvCTsxwO5Xw-GzX-U-cws/edit?usp=sharing + Future of microprocessors presentation by Sophie Wilson === Plan for week 28 === * TCWG-1428 (Support arithmetic on FileCheck regex variable): submit for external review + finish adding comments + add documentation and testcase * Start looking into MCF branch prediction overload due to too many consecutive branches ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 26
=== Work done during this 2.5day week === * 2.5 day off to take care of my sick son * stack-protector failure on GCC ARM: more testing needed + submitted CVE ID request -> will be known as CVE-2018-12886 once published + start testing * Continue work on DSGHACK-25 (Support arithmetic on FileCheck regex variable) * Misc improvement to Linaro TCWG infrastructure === Plan for week 27 === * finish testing of stack protector bug fix and submit patch for review * DSGHACK-25 (Support arithmetic on FileCheck regex variable): finish patch ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 25
=== Work done during this week === * stack-protector failure on GCC ARM: more testing needed + rework to introduce new standard pattern including guard's address computation and make pattern opaque until after register allocation + fill in form for new CVE ID and ask feedback on CVE description * Resume work on extending FileCheck to allow variable with arithmetic expression + created TCWG-1428 to track this work * Tried to fix LD_LIBRARY_PATH issue with depot build of GNU Arm Embedded Toolchain -> need to talk to someone who know better depot module recipes * Misc: + Arm meetings + Linaro syncs + 1.5 day spent on IT issue (personal investigation to help IT, blocked on broken system after some IT attempts to solve it) -> issue finally fully resolved === Plan for Linaro week 26 === * Do extended testing of stack protector bug fix * TCWG-1428 (Support arithmetic on FileCheck regex variable): finish patch ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 17
=== Work done during this GCC week === * stack-protector failure on GCC ARM: need feedback from community + prevent CSE of stack protector's guard first by adding some extra UNSPEC then instead by making all memory accesses involved volatile + write 2 monstro regex (251 & 377 characters respectively) to catch the bug on ARM, Thumb-2 and Thumb-1 + testing and will submit for review later today once I have all test results + discuss raising a CVE * Misc: + Arm meetings + Meeting with ST to discuss how to implement something akin to multilib + spec files for LLVM + Linary syncs + review of "Implement getConstraintRegister for ARM and AArch64" patch by Mikhail Maltsev === Plan for weeks up to 25 === * Paternity leave * Get stack-protector failure fix committed * DSGHACK-25 (Support arithmetic on FileCheck regex variable): finish patch * Start looking into LLVM SPEC optimizations Linaro tickets ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 16
=== Work done during this GCC week === * TCWG-1379 (stack-protector failure on GCC ARM): need feedback from community + reproduce on trunk and find out why it happens on ARM and not AArch64 or x86 + find potential issue for all targets as well, though less likely + find discrepencies between code and documentation and wondered if code is not overly zealous in some case * 2 days doing Arm handover & meetings === Plan for next week (week 12) === * Progress on stack-protector failure * Support arithmetic on FileCheck regex variable: finish patch ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 15
Note1: working for Linaro every other week === Issues === * IT issues made me loose 1 day of work === Work done during this LLVM+GCC week === * LLVM PR34170 (crashes with inline asm with double output operand in GPR): internal review + improved patch to also support case with several output operands -> had to choose to relax test a bit to not put expectation on register allocator * Support arithmetic on FileCheck regex variables: in progress + an attempt to be able to express that 2 registers are related by some arithmetic expression (eg. vmov dY, rX, rX+1), seems doable Upstream work on Arm GCC side: cmse_nonsecure_caller return wrong answer: backported to GCC 7 * __builtin_arm_set_fpscr crashes with literal values input: committed to trunk, backport oked + do more testing and prepare backport to GCC 6 & 7 * PR85344 (GCC fails constraint check on valid code): in progress + 2 prototype patches done but inconclusive result + pondering what should be the expect behaviour + investigating the extent of the problem -> both immediate and register constraints can be surprising === Plan for next week (week 12) === * Investigate stack-protector failure with Linaro GCC 7 toolchains * DSGHACK-25 (Support arithmetic on FileCheck regex variable): finish patch === Planned leave === * 28th April -> 29th May Sabbatical (Trip to France, then China, then France again) ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 14
Note1: working for Linaro every other week Note2: had some important work to do on GCC this week so I'll do some LLVM work next week as well to catch up === Work done during this LLVM+GCC week === * LLVM PR34170 (crashes with inline asm with double output operand in GPR): upstream review + finish patch and submit for upstream review === Plan for next week (week 12) === * (maybe) follow-up patch for PR34170 to also support case with several output operands * investigate failure to build clang in shared lib mode with gcc ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 10
Note: working for Linaro every other week === Work done during this LLVM week === * finish slides for bswap/store merging passes presentation in hacker room at Connect HK2018 * Continue working on fix for PR34170 / TCWG1137 (cannot select truncate in ARMv7 backend): -> better understanding of generation of ISD node for inline asm, finally seeing a way forward === Plan for next Linaro week (week 12) === * Linaro connect If time permits: * finish fix for PR34170 / TCWG1137 (cannot select truncate in ARMv7 backend) * investigate failure to build clang in shared lib mode with gcc ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 8
Note: working for Linaro every other week * start looking at fix for PR34170 / TCWG1137 (cannot select truncate in ARMv7 backend): + inline asm with >=64bit floating-point output is not handled + wrote a tentative patch which crashes later in the code, need to investigate * Start slides for technical talk in TCWG room @ Linaro connect: + bswap done, started to refamiliarize myself with store merging pass and its latest improvement * Merge the two patches for TCWG-1308 (missing pseudo expansion + crash in instruction selection of vector load/store with register writeback) === Plan for next Linaro week (week 10) === * finish fix for PR34170 / TCWG1137 (cannot select truncate in ARMv7 backend) * finish slides for bswap/store merging passes presentation in hacker room at Connect HK2018 ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 4
Note: working for Linaro every other week == Progress == * PR35157 / TCWG-1308 (crash in ARM backend for VST1d64TPseudoWB_fixed instruction): + after 2 attempts got now a clean patch with no testsuite regression + need to add testcase and it will be good to go upstream * Track down why xdg-open launches libreoffice for .dot files and opened Launchpad LP#1744953. * Misc meetings == Plan == * submit fix for PR35157 (crash in ARM backend for VST1d64TPseudoWB_fixed instruction) * fix for PR34170 / TCWG1137 (cannot select truncate in ARMv7 backend) * start preparing slide for bswap/store merging passes presentation in hacker room at Connect HK2018 ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
Re: arm-eabi-g++: -isystem option handle header as c linkage
Hi Martin,
In short yes, it is special behavior but I'm not sure that it is intended.
Each target can opt in to *not* have -isystem implicitly wrap headers in
extern C construct. Arm target does not do anything special and thus
inherit that default behavior of implicit extern C, except when targeting
uclinux systems. It seems from [1] that it is this way for legacy reason.
[1] https://gcc.gnu.org/ml/gcc-patches/2012-06/msg01151.html
Best regards,
Thomas
On 24 January 2018 at 17:02, Kaul, Martin wrote:
> Hi,
>
> given the following code:
>
> -- isystem_test.cpp -
> #include < isystem_test.h>
>
> bool dummy_function( void )
> {
> return false;
> }
> -
>
> -- isystem_test.h --
> template
> class allocator
> {
> };
> -
>
> and g++ version: arm-eabi-g++.exe (Linaro GCC 7.2-2017.11)
>
> 1. compiling with "arm-eabi-g++ -I . -g -c isystem_test.cpp"
> --> OK
>
> 2. compiling with " arm-eabi-g++ -isystem . -g -c isystem_test.cpp "
> --> output error:
> In file included from isystem_test.cpp:3:0:
> ./isystem_test.h:3:1: error: template with C linkage
> template
> ^~~~
>
> It seams that the option -isystem changes the include of isystems_test.h
> into a C include, i.e. the header content seems to be handled as C-Code
>
> Same error behavior with arm-eabi Linaro GCC 6.4-2017.11, Linaro GCC
> 6.3-2017.05
>
> -
> Testing the same with the mingw msys g++ compiler outputs no error:
> g++.exe (Rev2, Built by MSYS2 project) 7.2.0
> Copyright (C) 2017 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> ---
> Also no errors for:
> arm-linux-gnueabihf-g++.exe (Linaro GCC 6.3-2017.05)
> ---
>
> Is there a special behavior for arm-eabi g++ compiler?
>
> Best regards
> Martin Kaul
>
> ___
> linaro-toolchain mailing list
> linaro-toolchain@lists.linaro.org
> https://lists.linaro.org/mailman/listinfo/linaro-toolchain
>
___
linaro-toolchain mailing list
linaro-toolchain@lists.linaro.org
https://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] Weekly report for week 1 & 2
Hi everyone, Note 1: Working on Linaro 50% time. Note 2: had afternoons off for the first 2 weeks of January == Progress == * Week 1 (2/1 -> 5/1) working for Arm * Fix poor screen resolution issue * Onboarding process: + read all docs, setup accounts (gmail, octopus, ...) * PR35157 / TCWG-1308 (Crash in ARM backend for VST1d64TPseudoWB_fixed instruction): + reproduce in llc under gdb, start investigating == Plan == * PR35157 / TCWG-1308 (Crash in ARM backend for VST1d64TPseudoWB_fixed instruction) ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
