== This week ==
Merged all backports related to a53 support and successfully built arm
and aarch64 cross compilers:
202333 - [AArch64, ARM] Introduce "mrs" type attribute.
202334 - [AArch64] Use neon_<ldm,stm>_2 where appropriate as "type".
202448 - [AArch64] Prevent generic pipeline description from dominating
other pipeline descriptions.
202560 - set "type" attribute properly in arm_cmpsi_insn, cleanup
203241 - Cortex-a53 use Cortex tuning
203611 – 203621 – Neon types Parts 1 to 10
204575 - [ARM, AArch64] Make aarch-common.c files more robust.
205050 - [ARM] Add missing type attribute to zero_extend on arm
204782 - [AArch64] [-mtune cleanup 2/5] Tune for Cortex-A53 by default.
204784 - [AArch64] [-mtune cleanup 4/5] Remove "example-1", "example-2"
tuning options.
204852 - [AArch64] Remove simd_type
205014 - [AArch64] Remove v8type attribute.
205105 - [AArch64] Remove "mode", "mode2" attributes
204783 - [AArch64] [-mtune cleanup 3/5] [Temporary] When asked to tune
for Cortex-A57, tune for Cortex-A15
== Next week ==
Test a53 support
Backport vectorization bug
== Future ==
== Issues ==
* None
== Progress ==
* Identify a missing instruction pattern which blocks fcsel
optimization. A patch was sent out for community review. [2/10,
TCWG-309]
* Identify a ICE when handling dwarf-info in ARM backend when testing
shrink-wrap. A fix was committed to trunk. [2/10]
* Rebase and test the shrink-wrap codes for APCS_FRAME. [5/10]
* Prepare Linaro toolchain 2014.03 binaries release [1/10].
* Investigate CRC improvement chances.
== Plans ==
* Create a prebuilt sysroot based on Linaro eglibc-2014.04.
* Continue on shrink-wrap.
== Progress ==
* AArch64 (TCWG-387)
- Implemented simple C sin/cos functions for sphereflake
- AArch64 builds, passes check-all and test-suite
- Closed Jira task
* IAS (TCWG-377)
- Updated release notes
- IAS build, passes check-all, test-suite and compiles other large codebases
- Closed Jira task
* EHABI (TCWG-124)
- Updated release notes
- EHABI builds, passes check-all, test-suite
- Waiting for last patch to go to close the Jira task
* Compiler-RT (TCWG-125)
- Re-testing with current trunk+RT, all pass
- Next step, libunwind (not ready yet)
* Background
- Patch review, etc
- Studying TableGen, writing some docs (http://llvm.org/docs/TableGen/)
- Proposing changes to debug/EH unwind function attributes in IR
- Changing Zorg to not submit LNT reports by default (avoids bot breakage)
- Planning LLVM+Linux involvement as next big task
* Time
- CARD-862 8/10
- Others 2/10
== Plan ==
* Continue pushing __builtin___clear_cache and -fno-unwind-tables upstream
* Implement the Clang part of __builtin___clear_cache and update the docs
* Try to add LLVM/Clang to cbuildv2
* Start merging libunwind from libc++ to Compiler-RT and test it on ARM
* Get the kernel task started with the LLVMLinux guys
Hello,
the attached program changes the output from "true" to "false" when the
-Bsymbolic / -Bsymbolic-functions options are passed to GCC. This
happens on ARM -- on x86-64 output is always "true".
The program involves a comparison, within a shared library, of a PMF
defined inside the shared library itself with the same PMF passed by the
application.
At this stage I still don't know if it's a GCC problem, a ld.so problem,
ABI constraints, undefined behaviour, or whatnot; but any help is
appreciated.
Compile with:
> g++ -fPIC -shared -Wall -o libshared.so -Wl,-Bsymbolic shared.cpp
> g++ -fPIE -Wall -o main main.cpp -L. -lshared
(The long story is that Qt 5 is taking PMFs in its public API, and the
comparison failing inside of Qt shared libraries is breaking code on
ARM, as -Bsymbolic is set by default there.)
Thanks,
--
Giuseppe D'Angelo | giuseppe.dangelo(a)kdab.com | Software Engineer
KDAB (UK) Ltd., a KDAB Group company
Tel. UK +44-1738-450410, Sweden (HQ) +46-563-540090
KDAB - Qt Experts - Platform-independent software solutions
== Progress ==
* Off Monday after travelling back from Connect
* Catching up on email and post-Connect admin
* Released Linaro binutils 2.24.0 2014.03
* Submitted aarch64 setcontext patches upstream
* Submitted a patch for ld RELASZ issue
* Looked into eglibc svn mirroring
== Issues ==
* None
== Plan ==
* Resolve eglibc mirror situation
--
Will Newton
Toolchain Working Group, Linaro
== Progress ==
* Get started with Aarch64 GDB testing and development process using
foundation model. [6/10] [CARD-1115]
-- Figured out steps for running gdb in remote mode using foundation model.
-- Wrote a wiki page with steps on development process, still in progress.
-- Completed a gdb testsuite run and made a comparison with arm gdb.
-- All new testsuite results will be available on gdb wiki page.
-- Setup aarch64 gdb remote debugging.
* Updates to GDB pages on wiki.linaro.org [TCWG-96] [2/10]
-- Added pages containing test scripts and gdb testing tips
-- Added page containing current gdb testsuite results in various
configurations
* Add support for fork/vfork/exec events/catchpoints in remote
gdbserver [TCWG-263] [1/10]
-- GDB code review for task break down, still in progress.
* Fix network and internet problems [1/10]
== Plan ==
* Arm v8 reverse debugging support.[CARD-1115]
-- Provide card update and deliverable list.
-- Implement reverse debugging infrastructure for aarch64 gdb.
* Add support for fork/vfork/exec events/catchpoints in remote
gdbserver [TCWG-263]
-- GDB code review for task break down, still in progress.
* Update and cleanup gdb wiki pages on wiki.linaro.org
* All open gdb card review and update.
== Progress ==
* Went through few Linaro Connect - LCA14 slides and videos .
* Restarted upstream discussions on writing machine descriptions for
stack smashing. Working on submitting patches again as per Marcus
suggestions.
* Installed "CPU2006" in foundation model running open embedded image
and tried running 403.gcc benchmark.
* Tried buiding QEMU for aarch64 on ubuntu 12.04,2. I am getting
segment fault on using -L <library path >. Need to debug further.
* PGO runs: GCC boot strap failed when libjava building at stage3.
Need to have re-look further. Issue may be missing package in
opembedded image on foundation model.
Misc
------
Attended some Internal meetings.
== Plan ==
* Continue machine descriptions for stack smashing work.
* Work on using QEMU for running gcc test suites
* Restart PGO bootstrap failure investigations
== Issues ==
* None
== Progress ==
* Validate R/M toolchain 4.8 q1 update release.
* Try Cross-Native build based on Linaro crosstool-ng.
* Handle conditional compare in ifcvt.c to make ccmp and csel work together.
* Read document about FCMP/FCCMP and investigate on how to generate
FCCMP instructions:
- The tree representation of UNORDERED compare (UNLT, etc) can not
fit into current framework to handle CCMP.
- For LT, LE, GT and GE, the compiler will generate FCMPE
instruction, which can not be the first compare of CCMP.
- For NE, EQ, it is easy to handle them based on previous patches.
== Plan ==
* Continue on ccmp performance tuning.
