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SubjectRe: [Suggestion] arc: compiler: bug: about an arc compiler's bug which is not in gcc main source code.
On 09/23/2013 02:53 PM, Chen Gang wrote:
> On 09/23/2013 02:39 PM, Vineet Gupta wrote:
>> Hi Chen,
>> Jeremy, Claudiu, Joern maintain the gcc and rest of GNU toolchain ports for ARC so
>> please add them to any future posting on toolchain issues.

Firstly, sorry for so late to continue arc. Now I use latest tool-chain
(content gcc-4.8.0) to compile kernel with allmodconfig, and find three
tool chain issues (2 for gcc, 1 for binutils).

And also excuse me, I am still not quite sure where I should sent these
information to, although you have mentioned some valuable information.

I just list the issue details below, if necessary, please provide more
details where these information should be sent to (e.g. bugzilla), and
I will/should follow and work with related tool chain guys. thanks.

-------------------------information begin----------------------------


for Linux next-20130927 tree
make ARCH=arc CROSS_COMPILE=/usr/local/bin/arc-elf32- allmodconfig
make ARCH=arc CROSS_COMPILE=/usr/local/bin/arc-elf32-

Binutils (1 issue, ld and as information):

when calling panic(), printk(), or memset() with R_ARC_S21W_PCREL, it may be overflow (I guess it need be R_ARC_S25W_PCREL).

/usr/local/bin/arc-elf32-ld --build-id -X -o .tmp_vmlinux1 -T /android/public-kernel/linux-next/arch/arc/kernel/ arch/arc/kernel/head.o init/built-in.o --start-group usr/built-in.o arch/arc/built-in.o arch/arc/boot/dts/built-in.o arch/arc/plat-arcfpga/built-in.o arch/arc/plat-tb10x/built-in.o kernel/built-in.o mm/built-in.o fs/built-in.o ipc/built-in.o security/built-in.o crypto/built-in.o block/built-in.o lib/lib.a arch/arc/lib/lib.a /usr/local/lib/gcc/arc-elf32/4.8.0/libgcc.a lib/built-in.o arch/arc/lib/built-in.o /usr/local/lib/gcc/arc-elf32/4.8.0/libgcc.a drivers/built-in.o sound/built-in.o firmware/built-in.o net/built-in.o --end-group
/usr/local/bin/arc-elf32-ld: Error: Overflow detected in relocation value;
/usr/local/bin/arc-elf32-ld: Relocation value should be between 1048575 and -1048576 whereas it 2404264
/usr/local/bin/arc-elf32-ld: Global symbol: "panic".
Relocation type is:R_ARC_S21W_PCREL
Section Name:.text
Offset in Section:1716
/usr/local/bin/arc-elf32-ld: final link failed: Bad value
make: *** [vmlinux] Error 1

[root@gchenlinux binutils]# arc-elf32-ld -v
GNU ld (GNU Binutils) 2.23.2

[root@gchenlinux binutils]# arc-elf32-as -v
GNU assembler version 2.23.2 (arc-elf32) using BFD version (GNU Binutils) 2.23.2

GCC (2 issues, and gcc information):

CC drivers/rtc/systohc.o
drivers/rtc/systohc.c: In function 'rtc_set_ntp_time':
drivers/rtc/systohc.c:44:1: internal compiler error: in arc_ifcvt, at config/arc/arc.c:8315
0x939c94 arc_ifcvt
0x93a394 arc_reorg
0x7517d9 rest_of_handle_machine_reorg
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <> for instructions.
make[2]: *** [drivers/rtc/systohc.o] Error 1
make[1]: *** [drivers/rtc] Error 2
make: *** [drivers] Error 2

CC [M] drivers/target/target_core_pr.o
drivers/target/target_core_pr.c: In function 'target_scsi3_emulate_pr_in':
drivers/target/target_core_pr.c:4033:1: error: unrecognizable insn:
(insn 846 194 196 12 (set (reg:QI 1 r1)
(subreg:QI (mem/j/c:DI (plus:SI (reg/v/f:SI 2 r2 [orig:199 pr_reg ] [199])
(const_int 576 [0x240])) [0 pr_reg_50->pr_res_key+0 S8 A32]) 7)) drivers/target/target_core_pr.c:3677 -1
drivers/target/target_core_pr.c:4033:1: internal compiler error: in extract_insn, at recog.c:2151
0x758fb5 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*)
0x758fe9 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
0x726e83 extract_insn(rtx_def*)
0x726ef4 extract_insn_cached(rtx_def*)
0x5fe026 cleanup_subreg_operands(rtx_def*)
0x750c2e reload(rtx_def*, int)
0x68e703 do_reload
0x68e703 rest_of_handle_reload
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <> for instructions.
make[2]: *** [drivers/target/target_core_pr.o] Error 1
make[1]: *** [drivers/target] Error 2
make: *** [drivers] Error 2

[root@gchenlinux linux-next]# /usr/local/bin/arc-elf32-gcc -v
Using built-in specs.
Target: arc-elf32
Configured with: ../gcc/configure --without-header --disable-nls --enable-language=c --disable-threads --disable-shared --enable-werror=no target_configargs=enable_vtable_verify=yes --target=arc-elf32 --with-cpu=arc700 : (reconfigured) ../gcc/configure --disable-nls --enable-language=c --disable-threads --disable-shared --enable-werror=no target_configargs=enable_vtable_verify=yes --target=arc-elf32 --with-cpu=arc700 : (reconfigured) ../gcc/configure --without-header --disable-nls --enable-language=c --disable-threads --disable-shared --enable-werror=no target_configargs=enable_vtable_verify=yes --target=arc-elf32 --with-cpu=arc700 --disable-multilib --with-headers=../newlib/newlib/libc/include
Thread model: single
gcc version 4.8.0 (GCC)

-------------------------information end------------------------------

Chen Gang

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