I've changed the development focus in the Launchpad project to Linaro
GCC 4.7. This means that:
* Checking out lp:gcc-linaro now gives you the 4.7 branch
* New merge requests are targeted to 4.7 by default
This doesn't affect any already checked out branches or pending merge requests.
-- Michael
Hi,
GDB for Android:
* Wrote three patches for the build system allowing gdbserver
to be cross-compiled on Android [which were submitted upstream
this Monday].
* Started studying the ARM EABI to work on a way to mark a binary
as an Android application as opposed to a regular Linux EABI one.
* Wrote self-evaluation for Linaro performance review.
--
[]'s
Thiago Jung Bauermann
Linaro Toolchain Working Group
The PandaBoard auto builders are having a hard time keeping with
longer build and test times of 4.7 and the re-enabled libstdc++ tests.
For reference, here's how much each step costs:
Bootstrap GCC with C, C++, Fortran, and Obj-C: 9 hours
Test GCC: 9.5 hours
Test libstdc++: 4.4 hours
Test libgomp: 0.9 hours
Other tests: 0.2 hours
for a grand total of 23.8 hours. Every new commit gives a merge
request and trunk build for both A9 and ARMv5 giving 95 hours of
compute time. GCC 4.6 takes five hours to build and 5.5 to test.
This is just a FYI. I'll think about ways of speeding things up or
adding capacity. An i.MX6 with 2 GB of RAM and SATA would be nice...
-- Michael
Hi Michael,
I'm seeing what looks like bogus testsuite failures again:
https://code.launchpad.net/~uweigand/gcc-linaro/lp-960283-4.7/+merge/99069
I suspect this is still caused by the .ident version string, which now
appears to be:
[gcc-linaro/~uweigand revision 114974]
While it no longer contains the branch name, it still contains my user
name, which happens to include the string "and" ...
Mit freundlichen Gruessen / Best Regards
Ulrich Weigand
--
Dr. Ulrich Weigand | Phone: +49-7031/16-3727
STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E.
IBM Deutschland Research & Development GmbH
Vorsitzende des Aufsichtsrats: Martina Koederitz | Geschäftsführung: Dirk
Wittkopp
Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht
Stuttgart, HRB 243294
== Progress ===
* Off sick for 4 days last week.
* Looked at the results for the vfp writeback modes and caught up with
some analysis on the one day I did work.
=== Plans ===
* Catch up on email after absences.
* Catch up on patches backlog
Absences.
* Apr 12-13 : Euro-LLVM London.
* 1 week holiday sometime before that - to be booked
* Linaro Connect Q2.12 - May 28 - June 1 - travel booked - hotel to be booked.
---
* Linaro GCC
Applied my ARM conditional-execution and thumb 16-bit instruction size
optimization patch to upstream and Linaro 4.7.
Continued work on (slowly) working the bugs out of my 64-bit NEON
patches. Figuring out bootstrap failures is not easy! Eventually
discovered that:
* the NEON shifts patch was broken because combine was using the
patterns in ways they weren't intended.
* the NEON neg patch was broken because it needed an early-clobber
marker on the scratch register.
I've also reworked the use of insn_enabled to make it a little less
clunky. It's just an aesthetic change though.
If all goes well with my weekend bootstrap builds I should have the
patches reposted next week.
* Other
Richard Earnshaw asked me to bless use of a CS patch submitted to
gcc-patches@ by a third party. I dug out the original patch from the CS
archives and posted that to the message thread.
Summary:
* Validation for embedded toolchain 2012q1 update release and Linaro
binary toolchain 2012.03 release.
* Failed case analysis for -Os.
* Read benchmark code
Details:
1. Validation for embedded toolchain 2012q1 update release and Linaro
binary toolchain 2012.03 release.
2. Root cause the new failed cased pr30951.c with -Os.
In function tree_swap_operands_p (fold-const.c), there is a check
if (optimize_function_for_size_p (cfun))
return 0;
which blocks to swap (x != x + 10) to (x + 10 != x). And the
following optimization can only handle (x + 10 != x).
3. Read some benchmark codes to find the opportunities for code size
optimization.
Plans:
* Finalize Linaro binary toolchain 2012.03 release.
* Read benchmark codes.
Best regards!
-Zhenqiang
Current Milestones:
|| || Planned || Estimate || Actual ||
||cp15-rework || 2012-01-06 || 2012-03-30 || ||
Historical Milestones:
||initial-a15-system-model || 2012-01-27 || 2012-01-27 || 2012-01-17 ||
||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| 2012-02-01 ||
== cp15-rework ==
* more progress, mostly in figuring out how to connect the cp15 patches
with work by Andreas Färber to convert CPUs to QEMU's new object model.
* Patch series is now 36 patches long... (will probably split into two
parts for submission)
== other ==
* upstream patch review
* linaro performance review time again...
-- PMM
== GCC ==
* Posted second part of fwprop-subreg patch to gcc-patches.
* Investigated LP #960283, determined root cause, created patch,
and opened merge requests against Linaro GCC 4.6 and 4.7.
Opened mainline bugzilla PR tree-optimization/52686.
* Investigated LP #960274 and LP #960817, identified both as
duplicates of LP #960283.
* Investigated LP #959242, determined root cause. Ongoing
investigation of possible fixes.
* Ongoing work on improving end-of-loop value computation.
Mit freundlichen Gruessen / Best Regards
Ulrich Weigand
--
Dr. Ulrich Weigand | Phone: +49-7031/16-3727
STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E.
IBM Deutschland Research & Development GmbH
Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk
Wittkopp
Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht
Stuttgart, HRB 243294
