linaro-toolchain June 2013

linaro-toolchain@lists.linaro.org

20 participants
54 discussions

[ACTIVITY] 3 - 7 June 2013

by Omair Javaid

== Progress == * Investigated gdb.threads and gdb.multi failures and submitted patch to enable tests requiring multiple hardware breakpoints on arm targets. * Investigate gdb.base failures and submitted patch to enable disp-step-syscall.exp for arm targets. * Investigate gdb.mi and gdb.trace failures, some of problems are feature requests on arm. * Investigate gdb.base failures and submitted patch to enable disp-step-syscall.exp for arm targets. * Submitted gdb.dwarf2 pending patch. == Plan == * Try to fix remaining gdb failures. * Generate a fresh copy of gdb test suite results on arm and x86 * Chromebook os update on a faster sd card. * Add JIRA cards for gdb features missing on arm. * Follow up on Ireland visa application.

10 years, 10 months

[ACTIVITY] 2 - 7 June

by Kugan

== Progress == * Better end of loop counter optimisation - Experimented with fixing the extra instruction. - Found a possible way to fix it. Discussing it with Christophe. * Generate a single call to divmod - Looked at the code including how sin()/cos() -> sincos() handling in gcc. - Implemented a prototype and experimented. == Plan == * VRP based zero/sign extension - Ping the patch. * Generate a single call to divmod. - Finish the prototype implementation and get the regression working - Discuss in gcc mailing list for a good way to implement and get consensus with the results from prototype.

10 years, 10 months

[ACTIVITY] Week 23

by Zhenqiang Chen

== Issues == * None == Progress == * Test and send out shrink wrapping improvement patch for review (TCWG-133). * Update aarch64-none-elf TARGET_CFLAGS to " -g -O2 ". * Enable aarch64 gdb build for Windows (lp:1187862). * Investigate conditional compare RTL representation. - Trying to expand it to cmp_and/cmp_ior like instruction. == Plan == * Continue on conditional compare. == Planed leaves == * June 10-12: Dragon Boat Festival.

10 years, 10 months

[ACTIVITY] Week 23

by Will Newton

== Progress == * Fixed gdb.cp testsuite failures and committed upstream. * Worked with ITS to get git mirrors for libraries & tools. * Started documenting branch and merge policy on the wiki. * Respin AArch64 binutils ifunc patch and commit. * Looked into AArch64 assembler issue. * Assorted other gdb testsuite fixes. * Some research into malloc. == Issues == * None. == Plan == * Create release branches for libraries & tools and improve docs. * More gdb fixes. * More malloc reading. -- Will Newton Toolchain Working Group, Linaro

10 years, 11 months

[ACTIVITY] Week 23

by Renato Golin

`== Progress == * Release 3.3 - Testing and packaging RC3 http://llvm.org/pre-releases/3.3/rc3/ * Bootstrap Script - Check dependencies, checkout sources, bootstraps, test-suite, package - Works well on Intel (1h20min bootstrap twice + test-suite) - Works on Claxeda, Chromebook (10hs each) - Should work out-of-the-box anywhere: http://people.linaro.org/~rengolin/llvm/scripts/ * Buildbot - Following up on GCC/LD failure on linaro-panda-02 * CBuild - Adding Clang/Extra/RT to toolchain64.lab + update scripts, waiting for merge - Hopefully next build will get the whole pack * Phoronix - Setting up environment on my Chromebook, I'll have to think how to do that automatically - Running some base runs (gcc 4.6), still not automatic enough * LLVM administrativia - Reviewing patches, support, etc == Issues == * Network QoS is required to run buildbots, many failures due to timeout every week. The more bots we run, the more urgent will be this issue. == Plan == * Find a way to run Phoronix without human interaction (batch mode), and write a script to do that * Store the base runs somewhere (people.linaro?) and have the script install them to compare with any run on the board. * Test and release 3.3 Final * Use GCC 4.8 on linaro-panda-02 and hope to solve the problem * Finish LLVM+Clang change in CBuild (merge pending) and try to run some benchmarks with it * Think of a way to put bootstrap & phoronix in LAVA/CBuild (whatever is easier), so I can use the calxeda nodes without worry if they'll be up or down

10 years, 11 months

Failure to optimise (a/b) and (a%b) into single __aeabi_idivmod call

by Kugan

Hi, I am looking at best approach for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43721 - Failure to optimise (a/b) and (a%b) into single __aeabi_idivmod call in ARM architecture In sumary, the following c code results in __aeabi_idivmod() call and one __aeabi_idiv() call even though the former already calculates the quotient. int q = a / b; int r = a % b; return q + r; My question is what would be the best way to handle it. As I see there are few options with some issues. 1. Handling in gimple level, try to reduce the operations to equivalent of this. We should do this for the targets without integer divide. {q, r} = a % b; Gimple assign stmts have only one lhs operation (?). Therefore, lhs has to be made 64bit to signify return values of R0 and R1 returned together. I am not too sure of any implications on other architectures here. 2. Handling in expand_divmod. Here, when we see a div or mod operation, we will have to do a linear search to see if there is a valid equivalent operation to combine. If we find one, we can generate __aeabi_idivmod() and cache the result for the equivalent operation. As I see, this can get messy and might not be acceptable. 3. An RTL pass to process and combine these library calls. Possibly using cse. I am still looking at this. 4. Ramana tried a prototype to do the same using target pattens. He has ruled this out. (if you want more info, please refer to at https://code.launchpad.net/~ramana/gcc-linaro/divmodsi4-experiments) Any suggestion for best way to handle this? Thanks, Kugan

10 years, 11 months

GCC bootstrap build error with openembedded/v8 model

by Venkataramanan Kumar

Hi all, I am facing build error, when I try to bootstrap GCC trunk for native aarch64-unknown-linux-gnu configuration in openemedded/V8 model. Linker error occurs while building stage 1 GCC. (Snip) /usr/lib/gcc/aarch64-oe-linux/4.7.3/../../../../aarch64-oe-linux/bin/ld: gcov: hidden symbol `__deregister_frame_info' in /usr/lib/gcc/aarch64-oe-linux/4.7.3/../../../aarch64-oe-linux/4.7.3/libgcc_eh.a(unwind-dw2-fde-dip.o) is referenced by DSO /usr/lib/gcc/aarch64-oe-linux/4.7.3/../../../../aarch64-oe-linux/bin/ld: final link failed: Bad value collect2: error: ld returned 1 exit status (Snip) The steps to reproduce the issue is attached. Need some help to solve this. regards, Venkat.

10 years, 11 months

[ACTIVITY] 27-31 May 2013

by Christophe Lyon

== Progress == * Neon intrisincs: compiled my testsuite with GCC/trunk and filed bugzilla 57431 for ICE. * Merges for linaro-4.8-2013.06: started actual merges - fixed a cbuild reporting problem - faced calxeda and e2c problems, fixed by Matt. * Jira: a few updates * Libsanitizer: patched upstream, to be backported in GCC/trunk, then in gcc-linaro-4.8. == Next == * Merges for linaro-4.8-2013.06: complete them. * Disable-peeling: resume * Look at Kugan question about trunk regression * Libsanitizer/aarch64: resume * PGO/LTO/python bug: resume * Neon intrinsics/vzup/vero: resume

10 years, 11 months

[ACTIVITY] 27 - 31 May 2013

by Omair Javaid

== Progress == * Investigated attach to process and threads failures (TCWG-95<http://cards.linaro.org/browse/TCWG-95>). Almost all problems were fixed with any patch by making an os configuration change on chromebook. * Ran GDB test suites after OS configuration change on chromebook and updated test results. * Investigated inline-break.exp test suite failures on arm. GDB seems to be missing one inlined instance on two different functions. Obtained debug info and dumps of obj file without any luck to find the possible cause and fix. * Started work on integration of different testing scripts. Initially added commandline options in bash script to test let user choose target/host, native-none/native-gdbserver/remote, and testsuite/testcase configurations. == Plan == * Figure out a reason/solution for inline-break.exp failures on arm. * Investigate and Fix more ARM bugs shown in gdb 7.6 testsuite results. * Chromebook os update on a faster sd card. * Side activity work on automation of testing gdb in different configurations and uploading comparison result.

10 years, 11 months

[ACTIVITY] Week 22

by Yvan Roux

== Issues == * None. == Progress == * LRA on ARM and AArch64: - Tried to workaround the issue with new insns (reload_outdi,...). - But it doesn't seem to be handle by LRA. - Debug still ongoing. * Internal meetings == Plan == * Releases merge reviews * LRA

10 years, 11 months

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

linaro-toolchain June 2013