Hi there. The 2011.05 release has been spun and is testing up well.
The 4.5 and 4.6 branches are now open so feel free to commit any
approved patches.
-- Michael
Progress:
* Attended LDS from 9th -14th May.
Plans:
* Look at Thumb2 performance blueprint and break it down.
* Investigate more headroom for SPEC2k starting this week.
* Thumb2 performance call this week.
Meetings:
* 1-1s
* T2 performance.
Hello,
- Attended Linaro@UDS.
- SMS patches to support ARM do-loop pattern got approved in mainline
and merged into gcc-linaro 4.6 and 4.5.
- Sent merge request for two patches in trunk. (SMS_fixes_for_unfreed_memory)
- Implemented an optimization for the stage-count and now testing it.
Thanks,
Revital
== Last week ==
* At Linaro@UDS; I am still typing this in Budapest. Sparingly did some
work between sessions.
* PR42017, ARM LR register not being used. Discussed the patch with
Richard Sandiford at LDS. Re-tested a bit and about to resend a revised
patch according to his suggestion.
* LP:748138, redirect_jump() ICE. Committed patch to CS stable and
trunk. Submitted merge request to Linaro 4.5 branch.
* LP:689887. Got some suggestions from Revital on how to debug the
bootstrap failure caused by my patch, will look into applying it.
== This week ==
* Taking Monday off, I'll be flying back to Taiwan on Tuesday.
* Continue with issues after getting home.
RAG:
Red:
Amber:
Green: 1105 work item status 99% complete with 2 weeks to go
Current Milestones:
| Planned | Estimate | Actual |
qemu-linaro 2011-05 | 2011-05-19 | 2011-05-19 | n/a |
close out 1105 blueprints | 2011-05-28 | 2011-05-28 | |
complete 1111 planning | 2011-05-28 | 2011-05-28 | |
Historical Milestones:
finish qemu-cont-integration | 2011-01-25 | 2011-01-25 | handed off |
first qemu-linaro release | 2011-02-08 | 2011-02-08 | 2011-02-08 |
qemu-linaro 2011-03 | 2011-03-08 | 2011-03-08 | 2011-03-08 |
qemu-linaro 2011-04 | 2011-04-21 | 2011-04-21 | 2011-04-21 |
== merge-correctness-fixes ==
* some of my pending patches have been applied; a number of others are
still under discussion or need further work/testing
== other ==
* We won't be making a qemu-linaro 2011-05 release, since there are no
changes since the 2011-04 release (due to a combination of the Easter
holiday and UDS week).
* Attended UDS
* almost all 1105 work items either complete or confirmed postponed
to next cycle
* Good progress on fleshing out blueprints for next cycle:
https://wiki.linaro.org/PeterMaydell/Qemu1111
Current qemu patch status is tracked here:
https://wiki.linaro.org/PeterMaydell/QemuPatchStatus
Absences:
(maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver
[LinuxCon proper follows on 17-19th]
Last week, Ramana pointed me at an upstream bug report about the
inefficient code that GCC generates for vzip, vuzp and vtrn:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48941
It was filed not longer after the Neon seminar at the summit;
I'm not sure whether that was a coincidence or not.
I attached a patch to the bug last week and will test it this week.
However, a cut-down version shows up another problem that isn't related
specifically to intrinsics. Given:
#include <arm_neon.h>
void foo (float32x4x2_t *__restrict dst, float32x4_t *__restrict src, int n)
{
while (n--)
{
dst[0] = vzipq_f32 (src[0], src[1]);
dst[1] = vzipq_f32 (src[2], src[3]);
dst += 2;
src += 4;
}
}
GCC produces:
cmp r2, #0
bxeq lr
.L3:
vldmia r1, {d16-d17}
vldr d18, [r1, #16]
vldr d19, [r1, #24]
vldr d20, [r1, #32]
vldr d21, [r1, #40]
vldr d22, [r1, #48]
vldr d23, [r1, #56]
add r3, r0, #32
vzip.32 q8, q9
vzip.32 q10, q11
subs r2, r2, #1
vstmia r0, {d16-d19}
add r1, r1, #64
vstmia r3, {d20-d23}
add r0, r0, #64
bne .L3
bx lr
We're missing many auto-increment opportunities here. I think this
is due to the limitations of GCC's auto-inc-dec pass rather than to
a problem in the ARM port itself. I think there are two main areas
for improvement:
- The pass only tries to use auto-incs in cases where there is a
separate addition and memory access. It doesn't try to handle
cases where there are two consecutive memory accesses of the
form *base and *(base + size), even if the address costs make
it clear that post-increments would be a win.
- The pass uses a backward scan rather than a forward scan,
which makes it harder to spot chains of more than two accesses.
FWIW, I've got fairly specific ideas about how to do this.
Unfortunately, the pass is in need of some TLC before it's
easy to make changes. So in terms of work items, how about:
1. Clean up the auto-inc pass so that it's easier to modify
2. Investigate improvements to the pass
3. Submit the changes upstream
4. Backport the changes to the Linaro branches
I wrote some patches for (1) last week.
I'd estimate it's about 2 weeks' work for (1) and (2). (3) and (4)
would hopefully be background tasks. The aim would be for something
like:
.L3:
vldmia r1!, {d16-d17}
vldmia r1!, {d18-d19}
vldmia r1!, {d20-d21}
vldmia r1!, {d22-d23}
vzip.32 q8, q9
vzip.32 q10, q11
subs r2, r2, #1
vstmia r0!, {d16-d19}
vstmia r0!, {d20-d23}
bne .L3
bx lr
This should help with auto-vectorised code, as well as normal core code.
(Combining the vldmias and vstmias is a different topic. The fact that
this particular example could be implemented using one load and one
store is to some extent coincidental.)
Richard
== String routines ==
* Gave up on perf on silverbell and redid it on ursa2; now have a
full set of perf figures and have updated the workload report to show
the spec
binaries that use significant time in libc and the routines they spend
it in; a handful of tests spend very significant amounts of time in
libm.
* Have ltrace results from about 75% of spec - some of the others
are fighting a bit
* Optimised the non-neon memcpy; it's now quite respectable except
in one or two cases (2 byte misaligned, and for some odd reason source
offset
by 8 bytes, destination by 12 is way down on any other combination)
(Current result graphs here
https://wiki.linaro.org/Internal/People/DaveGilbert?action=AttachFile&do=ge…
)
Dave
Hi,
* continued looking into ffmpeg/libavcodec:
- dcadsp.c - the inner loop contains reverse accesses which are not
supported on Neon. I think we can handle them using vrev and vswp.
- a lot of loops have unknown memory stride. I am exploring a
possibility of a combination of scalar loads and vmov into a vector
register, but it is probably too expensive.
* looking into telecom/conven
Ira
== Last week ==
* Launchpad #748138: "ICE in redirect_jump, at jump.c:1443". Related to
shrink-wrap, discussed a bit with Bernd off-list. Sent fix today (Mon.)
to gnu-internal; will need to merge to Linaro.
* CoreMark combine canonicalize compares patch set: bootstrapped and
tested with clean results on powerpc, added comments and updated
upstream submission. Machine independent parts okayed by Jeff Law, now
committed upstream. ARM parts still pending review.
* Compiled back-list of upstream patches, and sent to patches(a)linaro.org
* Traveled to Budapest, Hungary for Linaro Developer Summit on Saturday.
== This week ==
* Linaro Developer Summit at Budapest all week.
== GDB ==
* Committed support for NEON registers in core dumps (bug #615972)
to Linaro GDB (not yet in mainline).
* Investigated root cause of bug #615996 (gdb.cp/templates.exp) and
started exploring ways to fix it.
== GCC ==
* Committed fix for bug #759409 (Profiled bootstrap fails in GCC 4.5)
to FSF GCC 4.5 branch and Linaro GCC 4.5.
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
Worked on the ARM 16 -> 64-bit multiply-and-accumulate problem. Bernd
kindly provided a prototype patch to help. I've tried to understand what
needs to be done, but I didn't have enough time to get to the bottom of
it. So far, I think I know why the existing code doesn't work, and I
think I have a way forward. It does appear that the real problem ought
to be solved in the tree optimizers, though.
Committed the FSF GCC 4.5.3 merge to the Linaro 4.5 branch. Testing did
not show any trouble.
Matthias requested an additional 4.5 merge to pick up a new bug fix, so
I've done the merge, and submitted the merge request for testing.
Committed Maxim's compound conditionals optimization patch - a merge
from Linaro GCC 4.5.
There was some confusion caused by the lp:gcc-linaro/4.6 branch history
accidentally getting re-written. After some discussion on #bzr I managed
to figure out what happened, posted a warning to linaro-toolchain
mailing list, and changed the branch configuration to prevent it
happening again.
Committed Mark Shinwell's BRANCH_COST patch to Linaro GCC 4.6 - another
merge from GCC 4.5.
Merged from FSF GCC 4.6 to Linaro 4.6 and submitted the patch for testing.
Richard Earnshaw approved my recent Thumb2 constants patch, but only if
I modify it slightly. I've begun work on the changes, but I still need
to test them. I won't be able to commit them until the ADDW/SUBW patch
has been approved.
Ramana has reviewed my EABI half-precision function names patch, and
discovered that the return types are wrong. I have no idea how this
happened - the changes are deliberate so they must have been based on
something, but I no longer have the same documents I had when I did the
work, and it clearly doesn't match my current ones. In any case, the
changes make no practical difference as function return values are
always as wide a register anyway.
* Other
Public holiday on Monday.
* Next week
I will be attending UDS in Budapest from 8th - 14th May. I shall
continue to read my email, but will not be attending any calls.
----
Upstream patched requiring review:
* NEON scheduling patch
http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html
* ARM Thumb2 addw/subw support.
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03783.html
== Bug fighting ==
* Tracked bug 774175 (apt segfault on armel on oneiric) down to the
cortex-a8 branch erratum bug that we found as part of the bug jam a
few weeks
ago (affecting the more obscure vtk package) - Richard's existing
binutils fix should fix this.
== String routines ==
* Struggled to get 'perf' to get sane results from profiling spec;
some of the samples are obviously being associated with the wrong
process somewhere
along the process (e.g. it's showing significant samples in the sh
process but in a library that's used by the actual benchmark.
* latrace on spec still running on ursa2
* Wrote a non-neon memcpy; as expected it's aligned performance is
very similar to libc/kernel - it's a bit faster in some places but
slower
in some odd places (e.g. n*32+1 bytes is a lot slower for some
reason). It's also really bad on mis-aligned cases, I tried to take
advantage
of the v7's ability to do misaligned loads - but they really are quite slow.
Dave
== This week ==
* Committed interleaved load/store vectorisation changes upstream.
* Merged the vldN and vstN intrinsic improvements into Linaro 4.5 and 4.6.
(Thanks for the quick reviews here.)
* Backported the interleaved load/store vectorisation changes to Linaro
4.5 and 4.6. This took a while because the patch series touches
turbulent code. Submitted merge requests.
* Merged Sergey Grechanik's NEON reload improvement into Linaro 4.5
and 4.6.
* Got ready for summit.
Richard
Hi,
* finished libunwind support of detection and handling of signal frames on
ARM Linux. RT and non-RT signal frames are handled for both >=2.6.18 and
<2.6.18 kernels. The *test-resume-sig testcases are passing now.
* briefly looked into what needs to be done in order to add 64bit __sync_*
ops
* prepared for LDS
Regards
Ken
RAG:
Red:
Amber:
Green: GSoC QEMU student project approved
Current Milestones:
| Planned | Estimate | Actual |
qemu-linaro 2011-05 | 2011-05-19 | 2011-05-19 | |
Historical Milestones:
finish qemu-cont-integration | 2011-01-25 | 2011-01-25 | handed off |
first qemu-linaro release | 2011-02-08 | 2011-02-08 | 2011-02-08 |
qemu-linaro 2011-03 | 2011-03-08 | 2011-03-08 | 2011-03-08 |
qemu-linaro 2011-04 | 2011-04-21 | 2011-04-21 | 2011-04-21 |
(short week, following holiday)
== merge-correctness-fixes ==
* some minor patches committed: SPARC build issues, Neon UNDEFs,
restore base reg properly for Thumb LDMs that abort midway
* v2 of configure patch to print list of valid targets
* some work on fixing QEMU FPSCR status flags (last remaining item
in this blueprint); submitted a patchset fixing everything except
the various VCVT instructions (which have trickier softfloat bugs)
* submitted patch fixing NaN behaviour in VMLA/VMLS/VNMLA/VNMLS
== other ==
* the Google Summer of Code QEMU project to work on upstreaming
some of the Android emulator has been approved; I will be mentoring
Patrick Jackson, who is the student who will be doing this work
* qemu-linaro 2011-05 is unlikely to have any code changes since 2011-04;
we might release it anyway just because it's the final one of the cycle
Current qemu patch status is tracked here:
https://wiki.linaro.org/PeterMaydell/QemuPatchStatus
Absences:
13-19 May: UDS, Budapest
(maybe but unlikely) 15-16 August: QEMU/KVM strand at LinuxCon NA,
Vancouver [LinuxCon proper follows on 17-19th]
There's already a couple of tools-related questions on here. We should
probably make sure we monitor it regularly.
This isn't to hard, once you're signed up, you can mark certain topics
as 'interesting' and then you'll get email notifications when there's a
post.
Andrew
-------- Original Message --------
Subject: Linaro forums replaced by "Ask Linaro"
Date: Fri, 06 May 2011 15:58:53 +0200
From: Michael Opdenacker <michael.opdenacker(a)linaro.org>
Organization: Linaro
To: everyone <everyone(a)linaro.org>
Greetings,
We are pleased to announce the replacement of our forums by a new "Ask
Linaro" service.
Better than forums, we expect this service to bring more questions and
answers, and incite people to join the Linaro community by sharing their
experience.
We count on your participation.
See http://ask.linaro.org/
Cheers,
Michael.
--
Michael Opdenacker - Community Manager
Linaro, http://linaro.org
Cell: +33 621 604 642
IRC: 'opm' in #linaro on irc.freenode.net
Hi all,
We seem to have had an accident!
This morning I merged one of my patches to lp:gcc-linaro/4.6, and this
afternoon I got an email from Launchpad notifying me that a mystery
revision had been deleted.
It seems that Richard has somehow overwritten my change with his.
Luckily I've spotted it and will fix it now, but it could very easily
have got lost.
I'm not sure what's happened here, but I'm pretty sure bzr does not just
do this silently. I thought you needed to specify --overwrite to do this
on purpose, but perhaps there's a bzr bug here?
Anyway, could everyone please be very careful when they do bzr push to
the release branches.
Thanks
Andrew
Hello,
[1] Regarding the patch 'Support closing_branch_deps'
http://gcc.gnu.org/ml/gcc-patches/2011-03/msg00350.html
Continued discussions with Ayal Zaks (SMS maintainer) regrading this patch.
(http://gcc.gnu.org/ml/gcc-patches/2011-05/msg00250.html)
I'm now working on simplifying the patch for resubmission according the
recommendation.
[2] Regarding the patch 'Avoid considering debug_insn when calculating SCCs'
http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01294.html The problem exposed
while testing patch [3] and it seems that is part of a bigger problem -- SMS
does not support debug_insn properly.
I've asked Alexandre Oliva who inserted the support for debug_insn to haifa
sched and selective sched to help with that.
[3] Regarding the patch 'Support instructions with REG_INC_NOTE'
http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01309.html
The fix for debug_insn (which the patch [2] tries to solve) is needed for
bootstrapping this patch. So I'm putting it on hold for now.
Thanks,
Revital
Hi,
- backported vzip fix to GCC 4.5 and 4.6 (PR 48252)
- merged auto-detection of vector size patch to gcc-linaro 4.6
- started looking into vectorization of ffmpeg
Ira
Hi,
I am trying add usb gadget mass storage to uboot , and got run-time
abortion on usbmsd.c with the default u-boot Os option. I use linaro
2011.03 4.5.3 version, and my trials as following:
1) During debugging , I found the abort exception in
usbmsd_init_strings(). if declaring it with noinline function, like
static void usbmsd_init_strings (void)
__attribute__((noinline));
it works, however, next steps still failed.
2) compling uboot with O0, everyhing is ok.
3) try other toolchain. It works with codesourcery's 2011.03-41
and ubuntu 4.5 version, while failed with 2011.04 4.5 linaro version.
4) I have dumped the obj files, seeming some funcs optimized
,analysing the details is out of my knowledge, :( . please check the
src and objdump files in one compressed file)
toolchain:
ypluo@ypluo-dt:~/work/Current/L38EVB/Main/out/prima2cb$
arm-none-linux-gnueabi-gcc --v
Using built-in specs.
COLLECT_GCC=arm-none-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/home/ypluo/work/Current/Tools/toolchain/linaro-201103-csr-build-armv7-vfpv3_x86_32/bin/../libexec/gcc/arm-none-linux-gnueabi/4.5.3/lto-wrapper
Target: arm-none-linux-gnueabi
Configured with:
/media/8ccb10fd-862c-47d2-99fb-144e7188e1fb/home/vmuser/development/toolchain/build-toolchain/gcc-linaro-4.5-2011.03-0/configure
--target=arm-none-linux-gnueabi
--prefix=/media/8ccb10fd-862c-47d2-99fb-144e7188e1fb/home/vmuser/development/toolchain/build-toolchain/tools
--enable-languages=c,c++ --with-arch=armv7-a --with-float=softfp
--with-fpu=vfpv3-d16 --with-mode=thumb --enable-shared
--enable-multiarch --enable-threads=posix --enable-nls
--enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --disable-werror
--with-pkgversion='Ubuntu/Linaro 4.5-2011.3-csr-build'
--enable-poison-system-directories
Thread model: posix
gcc version 4.5.3 20110221 (prerelease) (Ubuntu/Linaro 4.5-2011.3-csr-build)
ypluo@ypluo-dt:~/work/Current/L38EVB/Main/out/prima2cb$
/home/ypluo/mywork/toolchain/arm-2011.03/bin/arm-none-linux-gnueabi-gcc --v
Using built-in specs.
COLLECT_GCC=/home/ypluo/mywork/toolchain/arm-2011.03/bin/arm-none-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/mywork/toolchain/arm-2011.03/bin/../libexec/gcc/arm-none-linux-gnueabi/4.5.2/lto-wrapper
Target: arm-none-linux-gnueabi
Configured with:
/scratch/janisjo/arm-linux-lite/src/gcc-4.5-2011.03/configure
--build=i686-pc-linux-gnu --host=i686-pc-linux-gnu
--target=arm-none-linux-gnueabi --enable-threads --disable-libmudflap
--disable-libssp --disable-libstdcxx-pch
--enable-extra-sgxxlite-multilibs --with-arch=armv5te --with-gnu-as
--with-gnu-ld --with-specs='%{save-temps: -fverbose-asm}
%{funwind-tables|fno-unwind-tables|mabi=*|ffreestanding|nostdlib:;:-funwind-tables}
-D__CS_SOURCERYGXX_MAJ__=2011 -D__CS_SOURCERYGXX_MIN__=3
-D__CS_SOURCERYGXX_REV__=41 %{O2:%{!fno-remove-local-statics:
-fremove-local-statics}}
%{O*:%{O|O0|O1|O2|Os:;:%{!fno-remove-local-statics:
-fremove-local-statics}}}' --enable-languages=c,c++ --enable-shared
--enable-lto --enable-symvers=gnu --enable-__cxa_atexit
--with-pkgversion='Sourcery G++ Lite 2011.03-41'
--with-bugurl=https://support.codesourcery.com/GNUToolchain/
--disable-nls --prefix=/opt/codesourcery
--with-sysroot=/opt/codesourcery/arm-none-linux-gnueabi/libc
--with-build-sysroot=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/libc
--with-gmp=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-mpfr=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-mpc=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-ppl=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic
-lm' --with-cloog=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-libelf=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--disable-libgomp --enable-poison-system-directories
--with-build-time-tools=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/bin
--with-build-time-tools=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/bin
Thread model: posix
gcc version 4.5.2 (Sourcery G++ Lite 2011.03-41)
Please let me know if other info needed.
Many thanks.
Yuping
Hi,
I am trying add usb gadget mass storage to uboot , and got
run-time abortion on usbmsd.c with the default u-boot Os option. I
use linaro 2011.03 4.5.3 version, and my trials as following:
1) During debugging , I found the abort exception in
usbmsd_init_strings(). if declaring it with noinline function, like
static void usbmsd_init_strings (void) __attribute__((noinline));
it works, however, next steps still failed.
2) compling uboot with O0, everyhing is ok.
3) try other toolchain. It works with codesourcery's 2011.03-41
and ubuntu 4.5 version, while failed with 2011.04 4.5 linaro version.
4) I have dumped the obj files, seeming some funcs optimized ,
analysing the details is out of my knowledge, :( . please check the
attached three files.
toolchain:
ypluo@ypluo-dt:~/work/Current/L38EVB/Main/out/prima2cb$
arm-none-linux-gnueabi-gcc --v
Using built-in specs.
COLLECT_GCC=arm-none-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/home/ypluo/work/Current/Tools/toolchain/linaro-201103-csr-build-armv7-vfpv3_x86_32/bin/../libexec/gcc/arm-none-linux-gnueabi/4.5.3/lto-wrapper
Target: arm-none-linux-gnueabi
Configured with:
/media/8ccb10fd-862c-47d2-99fb-144e7188e1fb/home/vmuser/development/toolchain/build-toolchain/gcc-linaro-4.5-2011.03-0/configure
--target=arm-none-linux-gnueabi
--prefix=/media/8ccb10fd-862c-47d2-99fb-144e7188e1fb/home/vmuser/development/toolchain/build-toolchain/tools
--enable-languages=c,c++ --with-arch=armv7-a --with-float=softfp
--with-fpu=vfpv3-d16 --with-mode=thumb --enable-shared
--enable-multiarch --enable-threads=posix --enable-nls
--enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --disable-werror
--with-pkgversion='Ubuntu/Linaro 4.5-2011.3-csr-build'
--enable-poison-system-directories
Thread model: posix
gcc version 4.5.3 20110221 (prerelease) (Ubuntu/Linaro 4.5-2011.3-csr-build)
ypluo@ypluo-dt:~/work/Current/L38EVB/Main/out/prima2cb$
/home/ypluo/mywork/toolchain/arm-2011.03/bin/arm-none-linux-gnueabi-gcc
--v
Using built-in specs.
COLLECT_GCC=/home/ypluo/mywork/toolchain/arm-2011.03/bin/arm-none-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/mywork/toolchain/arm-2011.03/bin/../libexec/gcc/arm-none-linux-gnueabi/4.5.2/lto-wrapper
Target: arm-none-linux-gnueabi
Configured with:
/scratch/janisjo/arm-linux-lite/src/gcc-4.5-2011.03/configure
--build=i686-pc-linux-gnu --host=i686-pc-linux-gnu
--target=arm-none-linux-gnueabi --enable-threads --disable-libmudflap
--disable-libssp --disable-libstdcxx-pch
--enable-extra-sgxxlite-multilibs --with-arch=armv5te --with-gnu-as
--with-gnu-ld --with-specs='%{save-temps: -fverbose-asm}
%{funwind-tables|fno-unwind-tables|mabi=*|ffreestanding|nostdlib:;:-funwind-tables}
-D__CS_SOURCERYGXX_MAJ__=2011 -D__CS_SOURCERYGXX_MIN__=3
-D__CS_SOURCERYGXX_REV__=41 %{O2:%{!fno-remove-local-statics:
-fremove-local-statics}}
%{O*:%{O|O0|O1|O2|Os:;:%{!fno-remove-local-statics:
-fremove-local-statics}}}' --enable-languages=c,c++ --enable-shared
--enable-lto --enable-symvers=gnu --enable-__cxa_atexit
--with-pkgversion='Sourcery G++ Lite 2011.03-41'
--with-bugurl=https://support.codesourcery.com/GNUToolchain/
--disable-nls --prefix=/opt/codesourcery
--with-sysroot=/opt/codesourcery/arm-none-linux-gnueabi/libc
--with-build-sysroot=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/libc
--with-gmp=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-mpfr=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-mpc=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-ppl=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic
-lm' --with-cloog=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--with-libelf=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr
--disable-libgomp --enable-poison-system-directories
--with-build-time-tools=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/bin
--with-build-time-tools=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/bin
Thread model: posix
gcc version 4.5.2 (Sourcery G++ Lite 2011.03-41)
Please let me know if other info needed.
Many thanks.
Yuping
My MOVW patch from last week left an unused variable that killed -Werror
builds, so I posted a new patch to fix it.
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg04141.html
Ramana approved that in record time, so I've committed it.
Tom has committed Mark Shinwell's BRANCH_COST patch upstream, so I have
backported it to Linaro GCC 4.6.
Maxim has committed his compound conditionals patch upstream, so I've
backported that to Linaro GCC 4.6 also.
Reviewed what other patches are queued for forward porting to 4.6/7,
hoping that other's might have picked some of them off, and found no
other progress just yet.
Reduced the test case for GCC PR48783. For some reason it is retaining
".global" directives for symbols that have been optimized away, which
leads to link errors in the kernel build.
Tried to find out why the "discourage neon in A8" patch has caused test
failures. I'm still not sure - I've asked Michael Hope to rerun the
tests in case it's just random.
Reposted the EABI half-precision patch with the extra bits Joseph says
it needed in the version scripts.
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg04251.html
Looked at the linking problem reported by Barry Song on the
linaro-toolchain list.
* Other
Public holidays on Monday and Friday.
* Future
I will be attending UDS in Budapest from 8th - 14th May. I shall
continue to read my email, but will not be attending any calls.
----
Upstream patched requiring review:
* NEON scheduling patch
http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html
* ARM Thumb2 addw/subw support.
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03783.html
* ARM Thumb2 Replicated constants
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03883.html
* ARM EABI half-precision function names (reposted 2011-04-27).
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg04251.html
