The minutes of the main call held on 10 December 2012 can be found at:
https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2012-12-10
In summary the actions from the meeting are:
* ACTION: Yvan to post mail to linaro-toolchain(a)lists.linaro.org re:
4.6 armv5 sync failures
* ACTION: Matt review 4.7 AArch64 merge
* ACTION: Michael to check that the GDB snapshots claiming to be 7.7
are actually 7.6
* ACTION: everyone update the Linaro Leaves calendar for Christmas
* ACTION: Matt to look inside ARM re: EEMBC Office gs8 failures
* ACTION: Matt will send Ilias the KVM person names
* ACTION: re: left over branches: Michael to send an email and Ramana follow up
Thanks,
-- Michael
Hi Ulrich,
Before I build the cross compiler for ARM target I do a bootstrap
process of an i686 compiler on the same code base to use that one
building the cross compiler to reduce the chance of seeing subtle
problems late in the game. This process unveiled a x86 bootstrap
regression with some of your changes on the Linaro 4.7 branch.
It all boils down to the following set of changes you did:
commit c904094f2421bbd5d2cab6d7fbccecf055509629
Author: Ulrich Weigand <uweigand(a)de.ibm.com>
Date: Mon Jul 16 16:31:58 2012 +0200
Update to exactly reflect upstream version.
commit bf378903a1b749b904ae64635182e7fc9b43e0e4
Author: Ulrich Weigand <uweigand(a)de.ibm.com>
Date: Tue Jul 10 15:46:51 2012 +0200
Fix backport.
commit e0c3b0a21916ffafc058cd88d82423d87ce77b50
Author: Ulrich Weigand <uweigand(a)de.ibm.com>
Date: Mon Jul 9 22:52:10 2012 +0200
Fix LP 1020601.
This is the introduction of optimize_unreachable in gcc/tree-ssa-ccp.c.
When configuring with
../gcc/configure --host=i686-build_pc-linux-gnu
--build=i686-build_pc-linux-gnu --target=i686-build_pc-linux-gnu
--prefix=/ --libexecdir=//lib
--program-prefix=i686-build_pc-linux-gnu-
--with-sysroot=/user/rschiele/l/builddir/i686-build_pc-linux-gnu/sysroot
--with-local-prefix=/user/rschiele/l/builddir/i686-build_pc-linux-gnu/sysroot
--with-gmp=/user/rschiele/l/builddir/i686-build_pc-linux-gnu/sysroot/usr
--with-mpfr=/user/rschiele/l/builddir/i686-build_pc-linux-gnu/sysroot/usr
--with-mpc=/user/rschiele/l/builddir/i686-build_pc-linux-gnu/sysroot/usr
--with-cloog=/user/rschiele/l/builddir/i686-build_pc-linux-gnu/sysroot/usr
--with-ppl=/user/rschiele/l/builddir/i686-build_pc-linux-gnu/sysroot/usr
'--with-host-libstdcxx=/user/rschiele/l/builddir/i686-build_pc-linux-gnu/tools/lib/libstdc++.a
-lm' --disable-multilib --disable-checking --enable-__cxa_atexit
--enable-libmudflap --enable-libgomp --enable-libssp
--enable-languages=c,c++ --enable-threads=posix
--disable-libstdcxx-pch --enable-c99 --enable-long-long
--disable-shared
It fails in the bootstrap at
/user/rschiele/l/src/gccbuild/./prev-gcc/g++
-B/user/rschiele/l/src/gccbuild/./prev-gcc/
-B//i686-build_pc-linux-gnu/bin/ -nostdinc++
-B/user/rschiele/l/src/gccbuild/prev-i686-build_pc-linux-gnu/libstdc++-v3/src/.libs
-B/user/rschiele/l/src/gccbuild/prev-i686-build_pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/user/rschiele/l/src/gccbuild/prev-i686-build_pc-linux-gnu/libstdc++-v3/include/i686-build_pc-linux-gnu
-I/user/rschiele/l/src/gccbuild/prev-i686-build_pc-linux-gnu/libstdc++-v3/include
-I/user/rschiele/l/src/gcc/libstdc++-v3/libsupc++
-L/user/rschiele/l/src/gccbuild/prev-i686-build_pc-linux-gnu/libstdc++-v3/src/.libs
-L/user/rschiele/l/src/gccbuild/prev-i686-build_pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-c -g -O2 -gtoggle -DIN_GCC -fno-exceptions -fno-rtti -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute
-pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings
-DHAVE_CONFIG_H -I. -I. -I../../gcc/gcc -I../../gcc/gcc/.
-I../../gcc/gcc/../include -I../../gcc/gcc/../libcpp/include
-I/user/rschiele/l/builddir/i686-build_pc-linux-gnu/sysroot/usr/include
-I/user/rschiele/l/builddir/i686-build_pc-linux-gnu/sysroot/usr/include
-I/user/rschiele/l/builddir/i686-build_pc-linux-gnu/sysroot/usr/include
-I../../gcc/gcc/../libdecnumber -I../../gcc/gcc/../libdecnumber/bid
-I../libdecnumber
-I/user/rschiele/l/builddir/i686-build_pc-linux-gnu/sysroot/usr/include
-I/user/rschiele/l/builddir/i686-build_pc-linux-gnu/sysroot/usr/include
../../gcc/gcc/sel-sched.c -o sel-sched.o
../../gcc/gcc/sel-sched.c: In function 'void sel_sched_region_2(int)':
../../gcc/gcc/sel-sched.c:7472:1: error: mismatching comparison operand types
struct rtx_def *
bool
if (insn_1716 == 0)
../../gcc/gcc/sel-sched.c:7472:1: internal compiler error: verify_gimple failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Note, that the --disable-checking is essential to reproduce. As soon
as you do --enable-checking the bootstrap completes successfully. I
would assume that you then still have the bug in the compiler but it
is just subtle enough not to be triggered then.
Reverting your mentioned changes fixes this problem.
If you need further information about my environment to reproduce the
problem feel free to contact me.
Greetings,
Robert
The minutes of the performance call held on 11 December 2012 can be found at:
https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2012-12-11
In summary the actions from the meeting are:
* ACTION: Matt update meeting template attendees - to include Yvan
* ACTION: mgrettondann split LRA blueprint
* ACTION: Christophe to update Hot/Cold partitioning bugzilla
* ACTION: mgrettondann: benchmark on Hold/Cold partitioning
* ACTION: Christophe to look at the loop peeling cost
Thanks,
Yvan
This patch provides support to detect the host architecture in
configure.in use the detected architecture to conditionalize parts of
the Makefile.am. The intention is that we retain a single top level
Makefile which contains rules relevant to all supported architectures,
each gated by the AM_CONDITIONAL infrastructure.
/Marcus
Folks, In preparation for adding aarch64 string functions into
cortex-strings, I'd like feed back on the following series of patches.
1/5 Trivial whitespace cleanups.
2/5 Autotools foo for cross building support.
3/5 Autotools foo for architecture detection.
4/5 Missing LDADD and CFLAGS setting.
5/5 Use --std=gnu99
I'm particularly interested in views on 3/5. This patch sets
direction for autoconf detection of the host architecture. The
intention is that we retain the single toplevel Makefile.am which
gains AM_CONDITIONAL support for the detected host triple.
The aarch64 specific code will follow in a different patch set.
Cheers
/Marcus
Hi,
the issue seems indeed to be introduced by r193959 and fixed in
r194161, as it is reported in:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55571
Unfortunately, my merge attempt was at r190461 :(
I redo the merge...
Yvan
Summary:
* Validate RM toolchain, Linaro QENU 2012.12 and Linaro aarch64 2012.11.
* Collect performance data for different branch cost.
Details:
* Validate RM toolchain release.
* Set up test environment with the help of Michael and validate Linaro
QEMU 2012.12 release.
* Validate aarch64 toolchain 2012.11. From 2012.12, it will be
released regularly like arm-linux-gnueabihf toolchain.
* Collect denbench and spec2000int performance data for branch cost tuning.
* Investigate how to do copy propagation for shrink-wrap to optimize
453.povray benchmark. Will reuse current codes in pass_cprop_hardreg.
Plans:
* Performance reports for branch cost tuning.
* Fix README issue (lp:1068402) in Linaro crosstool-ng.
Best regards!
-Zhenqiang
