- linaro-toolchain - lists.linaro.org

by Renato Golin

== Progress == * Performance (CARD-1832 3/10) - Profiling SPEC2k mesa, found some issues - Investigating r232513, unlikely the culprit, but interesting case * Releases (CARD-1431 1/10) - Spinning 3.7.0 RC2 * Buildbots (CARD-1823 4/10) - Setting up new APMs - Dealing with ASAN/TSAN bot breakage - Other buildbot breakages * Background (2/10) - Code review, meetings, discussions, etc. - Writing a bisect script for LLVM

10 years, 4 months

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[ACTIVITY] 27 - 31 July 2015

by Omair Javaid

== Progress == LLDB development -- Setup lldb test debug environment for testing failing tests on chromebook. [1/10] -- Debug various lldb hang scnarios on chromebook for armhf support [TCWG-855] [4/10] -- Figure out alternate fix for http://reviews.llvm.org/D11129. [TCWG-855] [3/10] Miscellaneous [2/10] -- Fix chromebook malfunction due to battery issues -- Meetings, emails, discussions etc. == Plan == LLDB development -- Debug lldb test cases on armhf to figure out problems in individual test-cases -- Create an updated lldb development project plan on JIRA. -- Update collaborate with steps on LLDB development process.

10 years, 4 months

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[ACTIVITY] 27th - 31th July

by Kugan

== Progress == * Widening pass (TCWG-547) - 8/10 - Handled review comments. - Improved CONVERT_EXPR handling. - Re based and retested - found some failures. - This was due to VRP reusing the range info computed in VRP1 after type promotion is applied. Invalidating the range info when type is promoted. - ARM with type promotion now improves (-O2) about ~2.8% with one tiny benchmark (where it used to regress). - Still some test cases failures (not execution failures but scanning certain patterns in the dump/asm). * Misc - 2/10 - Connect slides. - gcc-patches, gcc-bgs list - Meetings == Plan == - Widening pass

10 years, 4 months

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[Weekly] 27-31 JULY 2015

by Michael Collison

== This week == * TCWG-146 - Detect smin/umin idiom (1/10) - Incorporated final feedback and submitted code in SVN * TCWG-140 - Transform end of loop conditions to min_expr (1/10) - Misc. discussion upstream about concerning where optimization should be performed - Upstream maintainers asked me to create gimple ir test case * TCWG-833 - Exploit Wide Add operations when appropriate (1/10) - Unable to validate yet * TCWG-834 - Use non-unit stride loads by preference when applicable (5/10) - Further Aarch32 investigation to determine where decision to forgo vld3 decision is being made * Linaro connect preparation (1/10) * Misc (1/10) - Conference calls == Next week == - Validate patches for TCWG-833 and submit upstream - Further TCWG-834 investigation - GNU Cauldron conference and travel

10 years, 4 months

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[activity] 27 - 31 July

by Prathamesh Kulkarni

== This Week == * TCWG-835 (4/10) - Validated and submitted patch upstream for review. - Made changes to patches according to upstream reviews. - Microbenchmarks: http://pastebin.com/tDnHZuG5 * TCWG-777 (5/10) - Investigating different ICE's caused by my gimple remove-temps pass - Looked at expansion of GIMPLE_COND - Trying to write rtl version of remove-temps pass * Misc (1/10) - Conference calls == Next Week == - Continue with TCWG-777 - GNU Tools Cauldron 2015

10 years, 4 months

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[ACTIVITY]

by Renato Golin

== Progress == * Performance (CARD-1832 1/10) - Checking differences of PostRAListSched on OOO ARM cores - Not many changes, ignoring for now * Maintenance (CARD-1833 4/10) - Building libc++/abi/unwind in LLVM/Clang tree - Getting -Wa,-mfpu patches in, last important Clang driver ARM bug - Some patches to get libunwind and libc++ to compile in-tree on ARM - Fixed native sub-features detection (http://llvm.org/PR12794) * Background (5/10) - Code review, meetings, discussions, etc. - Long discussions about TargetTuple/TargetParser/Triple - Lots of patch reviews this week (I mean, *A LOT*) - Moving some machines around, checking for Chromebook batteries - Setting up cross-builder using multiarch / QEMU - Some future planning == Plan == * Look for some more performance issues in 3.7 * Try to hook up the cross-builder * Investigate libc++ check-all failures

10 years, 4 months

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[ACTIVITY] 27-31 July

by Charles Baylis

Holiday [2/10] Illness [2/10] TCWG-835 - Vector division [1/10] . patch review TCWG-867 - AArch64 post-idx addressing [4/10] . prototype patch works . vectorizer needs more work to exploit this Misc [1/10]

10 years, 4 months

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[ACTIVITY] 20-24 July

by Charles Baylis

Benchmarking [1/10] TCWG-775 NEON error messages [1/10] . AArch64 patch set approved . rebased/retested and applied TCWG-830/833/835 Vectorization project [5/10] . emails, calls, patch review TCWG-867 - AArch64 post-idx addressing [2/10] . debugging prototype patch Misc [1/10]

10 years, 4 months

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[ACTIVITY] 13-17 July

by Charles Baylis

Holiday [4/10] Benchmarking [3/10] TCWG-867 - AArch64 post-idx addressing [2/10] . prototype patch Misc [1/10]

10 years, 4 months

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[ACTIVITY] 27th - 31st July

by Bernie Ogden

Benchmark infrastructure - TCWG-360 [8/10] * Testing found many problems in multinode * Iterating to solutions Misc [2/10] =Plan= Holiday next week. Then back to fixing multinode, incorporating into jenkins, noise control experiments

10 years, 4 months

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[ACTIVITY] 27th - 31th July

by Yao Qi

# Progress # * TCWG-806, aarch64 remote debugging multi-arch support. [4/10] Patches are posted upstream. * TCWG-860, aarch64 fast tracepoint. [1/10] Patch review and some discussions. * TCWG-757, upstream patch review. [2/10]. ** Review NIOS II R2 patches. ** Fix PR record/18691. * Misc, meeting. [3/10] # Plan # * TCWG-857, Investigate multi-arch HW watchpoint support in GDB and linux kernel. Clean up aarch64 HW watchpoint code. * GNU Tools Cauldron. -- Yao

10 years, 4 months

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ABE - bug in copy_gcc_libs_to_sysroot() while building native toolchain for aarch64

by Virendra Kumar Pathak

Hi Linaro Toolchain Group, I am building a native toolchain for aarch64 with below configurations: --build=x86_64-unknown-linux-gnu --host=aarch64-linux-gnu --target=aarch64-linux-gnu. In copy_gcc_libs_to_sysroot() - which copy libgcc.a to sysroot, current implementation try to find the absolute path of libgcc.a as below : libgcc="`${local_builds}/destdir/${host}/bin/${target}-gcc -print-file-name=${libgcc}` But above line will not execute (i.e. gcc -print-file-name) on x86_64 as the toolchain is native toolchain for aarch64-linux-gnu. Thus a infinite loop will be created in copy command i.e. copying directory x in x. however, when I hard coded the libgcc.a path in my machine (as below), everything went fine. libgcc="/home/vpathak/arm/toolchain/build_abe_new/builds/destdir/aarch64-linux-gnu/lib/gcc/aarch64-linux-gnu/5.1.1/libgcc.a" I think this is a bug in ABE build infrastructure. Thanks. -- with regards, Virendra Kumar Pathak

10 years, 4 months

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RE: [ACTIVITY] 20th - 24th July

by duane＠duaneellis.com

* TCWG-806, aarch64 remote debugging multi-arch support. [4/10] Patches are done. Need to test them and polish them. Fix various multi-arch issues when --wrapper is used in GDBserver. Patches are pushed in to mainline. Could you describe this activity in more detail? Is the goal here to support mixed aarch32/aarch64 in the same GDB binary and detect the change at runtime? Thanks. -Duane

10 years, 4 months

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[ACTIVITY] 20th - 24th July

by Kugan

== Progress == * Factor conversion out of COND_EXPR - TCWG-849 (5/10) - Iterated through the review and more testing * Looked at widening pass and the test-case from Wilco (1/10) * Misc (2/10) - Connect slides. - gcc-patches, gcc-bugs list - Meetings * Sick (2/10) == Plan == - GCC Bugs - Widening pass - Linaro bug 1318

10 years, 4 months

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[Weekly] 20-24 JULY 2015

by Michael Collison

== This week == * TCWG-146 - Detect smin/umin idiom (1/10) - Made change recommended upstream and resubmitted * TCWG-140 - Transform end of loop conditions to min_expr (1/10) - Validated and submitted upstream * TCWG-833 - Exploit Wide Add operations when appropriate (5/10) - Added early clobber and forced operand 0 and operand 2 to match - Finished Aarch32 by using mode iterators - Developed patch for Aarch64 - Wide add instructions are now emitted for both Aarch32 and Aarch64 * TCWG-834 - Use non-unit stride loads by preference when applicable (2/10) - Further Aarch32 investigation * Misc (1/10) - Conference calls == Next week == - Validate patches for TCWG-833 and submit upstream - Further TCWG-834 investigation - Linaro connect presentation preparation

10 years, 4 months

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[activity] 20 - 24 July 2015

by Prathamesh Kulkarni

* TCWG-835 (6/10) - Looked at newton raphson method - Need to write new md pattern that matches sdiv_optab for modes == v2sf, v4sf - First attempt for patch: http://pastebin.com/NKy8WdWC * TCWG-830 (2/10) - Ran Charles's benchmarks on ARM and AArch64. - Investigating testsuite fallout for ARM patch. - Still blocked by permissions to do benchmarking * Misc (2/10) - Conference Calls - US visa collection == Next Week == - Continue with TCWG-830, TCWG-835, TCWG-777

10 years, 4 months

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binutils - question on decoding decision tree for aarch64

by Virendra Kumar Pathak

Hi Linaro Toolchain Group, I am trying to learn the 'decoding decision tree' for aarch64 in binutils by trying to add a new assembly instruction 'addvp'. For example: addvp x0, x0, 9 For this, I added a entry in struct aarch64_opcode aarch64_opcode_table[] (file opcodes/aarch64-tbl.h) as below: {"addvp", 0x01000000, 0x7f000000, addsub_imm, 0, CORE, OP3 (Rd_SP, Rn_SP, AIMM), QL_R2NIL, F_SF}, ARM manual say, bit 27 & bit 28 are unallocated. Thus for addvp, I am giving opcode 01000000 (with bit 27 & 28 as 0). With this, generating object file from assembly file is successful (test.s --> test.o); but while disassembling using objdump, it say undefined instruction. >From objdump log: 81002400 .inst 0x81002400 ; undefined (but instruction was generated correct i.e. 81002400 !!!). I know since addvp is a hack instruction, it won't execute on cpu. But still disassembly should succeed. 1. Please help me in knowing what I am doing wrong here ? What else I should do to add a new instruction in binutils ? 2. I also saw some printf in opcodes/aarch64-gen.c which I guess create decoding tree (initialize_decoder_tree()). How to print them ? I made debug =1 but still print is not coming. 3. There are some auto-generated files like aarch64-asm-2.c, aarch64-dis-2.c. How to re-generate them ? Thanks. -- with regards, Virendra Kumar Pathak

10 years, 4 months

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[ACTIVITY]

by Renato Golin

== Progress == * Maintenance (CARD-1833 5/10) - Building libc++/abi/unwind in LLVM/Clang tree - Fixing some build errors (D11486) - Addressing comments to submissions from last week - Committing approved ones - Re-working the others * Releases (CARD-1431 1/10) - Building 3.7.0-RC1 on ARM and AArch64, uploading * Benchmarks (CARD-716 2/10) - Running LNT, SPEC and EEMBC on ARM and AArch64 for 3.7.0 * Background (2/10) - Code review, meetings, discussions, etc. - Upgraded APM to Debian, kernel 3.16 - Perf still segfaults. :( == Plan == * Finish open reviews * Continue getting libc++ to build and pass the tests in tree * Look at some of the performance regressions in 3.7

10 years, 5 months

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[ACTIVITY] 20th - 24th July

by Yao Qi

# Progress # * TCWG-806, aarch64 remote debugging multi-arch support. [4/10] Patches are done. Need to test them and polish them. Fix various multi-arch issues when --wrapper is used in GDBserver. Patches are pushed in to mainline. * TCWG-876 [1/10] Re-run GDB testsuite with incoming Linaro toolchain release. Everything looks OK. * TCWG-860, aarch64 fast tracepoint. [1/10] Polish the patches, and ready for submission. * TCWG-757, upstream patch review. [2/10]. * Misc, meeting. [2/10] # Plan # * TCWG-806, test patches on different targets, polish patches and post them for review. # Absence # 06th Aug - 10th Aug, GNU Tools Cauldron. 11th Aug - 14th Aug, Holiday. -- Yao

10 years, 5 months

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[ACTIVITY] 20th - 24th July

by Bernie Ogden

Benchmark infrastructure - TCWG-360 [6/10] * Some user support/bugfixing/bugraising * Multinode job more or less working (not fully tested) * Additional restructuring got rid of some more complexity ** Though if my simplifying assumption doesn't hold, I'll have to put it back Benchmarking 101 presentation [2/10] * Ran through slides with Ryan & Maxim * Removed many slides * Collected up and categorized the removed slides ** Probably will go into future presentation(s) Misc [2/10] =Plan= * Tweak multinode a little more * Integrate multinode into Jenkins ** To the extent that I'm comfortable with the security * Read a bit about some benchmarks that aren't SPEC * Start noise control experiments (may inform presentation) =Week After Next= Holiday

10 years, 5 months

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[ACTIVITY] Week 29

by Yvan Roux

* One day off - Bastille day (2/10) == Progress == o Upstream GCC (3/10) * Finalized and committed fix in trunk for Linaro bug #416 o Linaro GCC release (4/10) * Reviewed and did more patches for tcwg-release script * Still investigate validation issues. * Prepared FSF branch merge into Linaro GCC 5 branch o Misc (1/10) * Various meetings == Plan == - Summer Holidays (2 weeks)

10 years, 5 months

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[ACTIVITY] 13-17 July 2015

by Kugan

== Progress == * Add REG_EQUAL note for arm_emit_movpair (1/10) - Patch2 ok to commit. - Ran complete validation. - Found an issue and posted a patch to fix * Factor conversion out of COND_EXPR - TCWG-849 (6/10) - Found a performance regression in tree-ssa-reasoc - Looked at the tree-ssa-reasoc code to see possible fixes - Posted an RFC patch * PR66865 - Wine segfaults from gcc in trunk (r225757) - Reproduced it but turned out not from my commit - Fixed by other PR * Misc (2/10) - Looked at interaction between gcc optimization passes - gcc-patches, gcc-bugs list - Meetings == Plan == - GCC Bugs - TACT driven optimization exploration for gcc - Linaro bug 1318

10 years, 5 months

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[ACTIVITY] 13th - 17th June

by Bernie Ogden

Benchmark infrastructure - TCWG-360 [5/10] * Worked through my Jenkins issues with Fathi, raised some tickets at him * Converting LAVA end into multinode job ** Having some trouble with multinode API Benchmarking 101 presentation [3/10] * 1/2 day of discussions/reading, full day of redrafting * Looked for Michael Hope's similar 2012 presentation ** Found slides, not video =Plan= * Complete multinode job * Integrate into Jenkins to the extent that I'm comfortable * Complete 'shareable' draft of benchmarking-101 ** And see if I have enough left over for -102, maybe -103

10 years, 5 months

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[Weekly] 13-17 JULY 2015

by Michael Collison

== This week == * TCWG-140 - Transform end of loop conditions to min_expr (1/10) - Blocked waiting on validation * TCWG-833 - Exploit Wide Add operations when appropriate (7/10) - Developed patch to handle signed and unsigned cases for Aarc32 - Investigation and debugging into support for Aarch64 * TCWG-834 - Use non-unit stride loads by preference when applicable (1/10) - Initial Aarch32 investigation * Misc (1/10) - Conference calls == Next week == - Validate Aarch32 patch for TCWG-833 - Develop Aarch64 patch for TCWG-833 - Validate TCWG-140 - Make recommended fixes to TCWG-146 and resubmit upstream

10 years, 5 months

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[activity] 13 - 17 July 2015

by Prathamesh Kulkarni

* TCWG-777 (3/10) - O2 workaround: -fno-tree-pre -fno-tree-fre -fno-tree-dominator-opts -fno-gcse -fno-peephole2 - Observing rtl dumps for gcse, combine, peephole2 with different options and optimization levels. - Continued investigating ICE during gcc build with my pass applied. - Sent mail to tcwg, for further suggestions * TCWG-830 (2/10) - Verified the behavior for aarch64, and extended patch for aarc64 along same lines. - Running Charles's microbenchmarks on r1-a7 - Benchmarking setup with Bernie. Blocked by permissions, sent a mail to lava-lab, for granting requisite permissions * TCWG-835 (2/10) - observing vector and asm dumps * Misc (3/10) - Travel to Mumbai for US Visa Interview - Conference Calls == Next Week == - Continue with TCWG-777, TCWG-835, TCWG-830

10 years, 5 months

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