On 01/03/15 16:47, Christophe Lyon wrote:
On 27 February 2015 at 21:49, Jan Hubicka <hubi...@ucw.cz> wrote:
../sysdeps/gnu/siglist.c:72:1: internal compiler error: in address_matters_p,
at symtab.c:1908
versioned_symbol (libc, __new_sys_sigabbrev, sys_sigabbrev, GLIBC_2_3_3);
^
0x66a080 symtab_node::address_matters_p()
/scratch/sellcey/repos/bootstrap/src/gcc/gcc/symtab.c:1908
0xe7cbe5 ipa_icf::sem_variable::merge(ipa_icf::sem_item*)
/scratch/sellcey/repos/bootstrap/src/gcc/gcc/ipa-icf.c:1443
Indeed, the ipa-icf should not try to analyze aliases - just prove ekvialence of
definitions they are attached to. It already does that for functions (bit by
accident;
it gives up when there is no gimple body), but it does not do that for
variables because
it gets into ctor_for_folding. For that reason it sometimes decides to try to
make two
variable aliases alias of each other that is not a good idea, because of
possible creation
of loops.
I am just discussing with Martin the fix.
Honza
For the record, I have noticed similar errors on ARM and AArch64
targets, when building glibc.
Christophe.
I confirm ARM and AArch64 failing to build with this patch:
/work/build-aarch64-none-linux-gnu/install//bin/aarch64-none-linux-gnu-gcc
../sysdeps/posix/cuserid.c -c -std=gnu99 -fgnu89-inline -O2 -Wall
-Winline -Wundef -Wwrite-strings -fmerge-all-constants -frounding-math
-g -Wstrict-prototypes -fPIC -fexceptions -I../include
-I/work/build-aarch64-none-linux-gnu/obj/glibc/stdio-common
-I/work/build-aarch64-none-linux-gnu/obj/glibc
-I../sysdeps/unix/sysv/linux/aarch64 -I../sysdeps/aarch64/nptl
-I../sysdeps/unix/sysv/linux/generic
-I../sysdeps/unix/sysv/linux/wordsize-64
-I../sysdeps/unix/sysv/linux/include -I../sysdeps/unix/sysv/linux
-I../sysdeps/nptl -I../sysdeps/pthread -I../sysdeps/gnu
-I../sysdeps/unix/inet -I../sysdeps/unix/sysv -I../sysdeps/unix
-I../sysdeps/posix -I../sysdeps/aarch64/fpu -I../sysdeps/aarch64
-I../sysdeps/wordsize-64 -I../sysdeps/ieee754/ldbl-128
-I../sysdeps/ieee754/dbl-64/wordsize-64 -I../sysdeps/ieee754/dbl-64
-I../sysdeps/ieee754/flt-32 -I../sysdeps/aarch64/soft-fp
-I../sysdeps/ieee754 -I../sysdeps/generic -I.. -I../libio -I.
-nostdinc -isystem
/work/build-aarch64-none-linux-gnu/install/bin/../lib/gcc/aarch64-none-linux-gnu/5.0.0/include
-isystem
/work/build-aarch64-none-linux-gnu/install/bin/../lib/gcc/aarch64-none-linux-gnu/5.0.0/include-fixed
-isystem
/work/build-aarch64-none-linux-gnu/install//aarch64-none-linux-gnu/libc/usr/include
-D_LIBC_REENTRANT -include
/work/build-aarch64-none-linux-gnu/obj/glibc/libc-modules.h
-DMODULE_NAME=libc -include ../include/libc-symbols.h -DPIC -DSHARED
-D_IO_MTSAFE_IO -o
/work/build-aarch64-none-linux-gnu/obj/glibc/stdio-common/cuserid.os -MD
-MP -MF
/work/build-aarch64-none-linux-gnu/obj/glibc/stdio-common/cuserid.os.dt
-MT /work/build-aarch64-none-linux-gnu/obj/glibc/stdio-common/cuserid.os
../sysdeps/gnu/siglist.c:77:1: internal compiler error: in
address_matters_p, at symtab.c:1908
versioned_symbol (libc, __new_sys_sigabbrev, sys_sigabbrev, GLIBC_2_1);
^
*** errlist.c count 134 inflated to GLIBC_2.12 count 135 (old errno.h?)
chmod a-w
/work/build-aarch64-none-linux-gnu/obj/glibc/stdio-common/errlist-compat.cT
0x6b9100 symtab_node::address_matters_p()
/work/src/gcc/gcc/symtab.c:1908
0xedb4e5 ipa_icf::sem_variable::merge(ipa_icf::sem_item*)
/work/src/gcc/gcc/ipa-icf.c:1723
0xee03f9 ipa_icf::sem_item_optimizer::merge_classes(unsigned int)
/work/src/gcc/gcc/ipa-icf.c:2955
0xee6d31 ipa_icf::sem_item_optimizer::execute()
/work/src/gcc/gcc/ipa-icf.c:2217
0xee8df1 ipa_icf_driver
/work/src/gcc/gcc/ipa-icf.c:3034
0xee8df1 ipa_icf::pass_ipa_icf::execute(function*)
/work/src/gcc/gcc/ipa-icf.c:3081
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[2]: ***
[/work/build-aarch64-none-linux-gnu/obj/glibc/stdio-common/siglist.o]
Error 1
make[2]: *** Waiting for unfinished jobs....
mv -f
/work/build-aarch64-none-linux-gnu/obj/glibc/stdio-common/errlist-compat.cT
/work/build-aarch64-none-linux-gnu/obj/glibc/stdio-common/errlist-compat.c
Regards,
Alex
