All,
Due to items in the performance call being covered in other meetings, travel
and other issues I have decided to cancel today's 1600 UTC call.
Thanks,
Matt
--
Matthew Gretton-Dann
Toolchain Working Group, Linaro
This patch fixes an issue in the AArch64 strncmp implementation which
occurs if ULONG_MAX-15 <= n <= ULONG_MAX.
Matt, this is the last of my outstanding patches for cortex-strings.
/Marcus
Hi folks,
On the LLVM list, Tim (ARM) is trying to push a patch to update the
polynomial types on NEON to unsigned, on both 32-bits and 64-bits, since
AArch32 says nothing and AArch64 specifies unsigned (char and short).
Is there any such movement on the GCC end? The LLVM folks would rather this
be a common move (or GCC first), than going solo and risk losing ABI
compatibility.
Any comments?
cheers,
--renato
Hi All,
I am trying to build OpenNI drivers and stuck with the following linker
error.
/usr/bin/ld: error: ../../Bin/Arm-Release/libOpenNI.so uses VFP register
arguments, ./Arm-Release/XnBaseNode.o does not
/usr/bin/ld: failed to merge target specific data of file
./Arm-Release/XnBaseNode.o
/usr/bin/ld: error: ../../Bin/Arm-Release/libOpenNI.so uses VFP register
arguments, ./Arm-Release/XnDump.o does not
/usr/bin/ld: failed to merge target specific data of file
./Arm-Release/XnDump.o
and many more of similar errors with VFP.
System : ZYNC ZC702 board with ARM Cortex A9 dual core.
OS: Linaro 12.04 LTS
GCC - 4.6.3
Is there some flag i have to set in the Makefile to correct the Hard/Soft
float type ?
How do i figure out the correct one ?
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Hi,
The testcase at https://launchpadlibrarian.net/128616769/compare-test.c
With aarch64:
aarch64-oe-linux-gcc -o a-test ./compare-test.c
./a-test:
fail ret: -1: Bad address
With X86_64:
gcc -o test ./compare-test.c
./test
correct. ret: -1: Bad address
setting -D_FILE_OFFSET_BITS=64 doesn't make a difference.
This is with:
gcc version 4.7.3 20121205 (prerelease) (Linaro GCC 4.7-2012.12)
This was found while debugging:
https://bugs.launchpad.net/linaro-aarch64/+bug/1099896
Riku
All,
The minutes for today's calls are here:
https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2013-01-14
Action items are:
TODO: Matt to investigate EEMBC Office gs8 failures
ONGOING: Matt to talk to Dave Pigott about HF builders
TODO: Matt blueprint backport of binutils 2.23.1 - backport just needs merging
TODO: Matt to blueprint options for reducing QEMU based cross test noise
TODO: Matt to unreserve Michael Hope's reservations
TODO: Matt to look at why Cortex-A9 softfloat bootstraps fail in Stage2.
TODO: Zhenqiang to do GCC Release:
https://wiki.linaro.org/WorkingGroups/ToolChain/GCC/ReleaseProcess
TODO: Matt to do Cortex Strings release.
TODO: Matt chase up EEMBC Networking License
TODO: Matt chase up with morvek who is leading KVM Virtual team.
TODO: All to think of proposals for GNU Tools Caudron
The agenda for next week's call is here:
https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2013-01-21
Please feel free to add your own agenda items before hand.
Thanks,
Matt
--
Matthew Gretton-Dann
Toolchain Working Group, Linaro
Summary:
* Rebase and test the shrink-wrap patches.
* Learn how branch cost impact on code generation.
Details:
1. Rebase and test the shrink-wrap patches.
* For pretend arguments, it is hard to generate correct dwarf info for case:
* Add dwarf info for ldrd_pop. Testing is ongoing.
* Expose an interface from regcpprog and do copy propagation for the
entry block. Benchmark logs show there are much more functions can be
shrink-wrapped.
2. Read codes and enhance ifcvt.c.
* For IF-THEN-ELSE, if the last insn of then_bb or else_bb is
ANY_RETURN_P, we can save one JUMP. In this, we'd keep max
MAX_CONDITIONAL_EXECUTE, not "max *= 2". A patch is sent out for
review.
* Take the branch probability into account. Test is ongoing.
3. R/M toolchain related work.
Plan:
* Follow up the shrink-wrap dwarf info issue.
* Investigate benchmarks which is impacted by different branch cost.
Planed leaves:
* Feb. 9 - 15: Chinese Spring Festival.
Best Regards!
-Zhenqiang
== Progress ==
* Short week again (leading compilation courses)
* Merge request review
- finished 4.6 and 4.7 requests.
* Boehm GC AArch64 support
- Back on this topic
== Next ==
* Continue Boehm GC activity
== This Week ==
* Livermore Loops
- Test was badly adapted, failures were due to undefined behaviour
- Removed from test-suite until a propper adaptation can be done
- LTO and Static Analysis issues raised
- http://llvm.org/bugs/show_bug.cgi?id=14851
- http://llvm.org/bugs/show_bug.cgi?id=14852
* LLVM Builds
- Builds fine on Chromebook, same check-all failures as other ARM targets
- test-suite fails, haven't had time to properly investigate
- Getting a pandaboard to act as a buildbot
- Creating a LAVA job to run often and on-demand internally
* AArch64 in LLVM
- reviewing lots of patches from ARM (Tim Northover)
- full back-end just sent, will review over the weekend
* Loop Vectorize
- Some discussions with Tao Wang about cost models
- Got some ideas on what are the best changes for LLVM's cost model
- Not much on this front
* EuroLLVM 2013
- Trying to define the level of sponsorship Linaro can provide
- CFP will go out next week, committee created, conference confirmed
* Commits
http://llvm.org/viewvc/llvm-project?view=rev&revision=171642http://llvm.org/viewvc/llvm-project?view=rev&revision=171859
== Next Week ==
* Get the LAVA job running
- need account at people.linaro.org, RT created
* Get at least one buildbot in sync with LLVM's lab
* Get some traction on the cost model
* Cambridge LLVM Social, liaise with ARM
== Future ==
* Try to draft an LLVM story for Linaro (and understand why I'm here in the
first place) ;)
* Have builds with vectorization turned on
