https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97939
Dennis Clarke <dclarke at blastwave dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dclarke at blastwave dot org
--- Comment #4 from Dennis Clarke <dclarke at blastwave dot org> ---
Merely a little followup here. I did see that a unit test in the new
libgmp was failing in strange ways on sparc64 and thus I did a round of
tests with the previous libgmp and with two versions of gcc on Debisn
sid. In all cases the libgmp test failed but only on one platform.
https://gmplib.org/list-archives/gmp-bugs/2020-November/004962.html
The idea on the table is that we have a compiler fault here and then
Vincent Lefèvre seems to have isolated the code test down to a trivial
test case.
To add on here I see the same sort of behavior with gcc 8.1.0 on a
Solaris sparcv9 server :
isc $
isc $ uname -a
SunOS isc 5.10 Generic_150400-44 sun4u sparc SUNW,UltraAX-i2
isc $ /usr/local/gcc8/bin/gcc --version
gcc (genunix Fri May 11 08:23:40 GMT 2018) 8.1.0
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
isc $ $CC -fsanitize=undefined -v -c tst.c
Using built-in specs.
COLLECT_GCC=/usr/local/gcc8/bin/gcc
Target: sparc64-sun-solaris2.10
Configured with: ../gcc-8.1.0/configure --prefix=/usr/local/gcc8
--build=sparc64-sun-solaris2.10 --target=sparc64-sun-solaris2.10
--host=sparc64-sun-solaris2.10 --without-gnu-as --without-gnu-ld
--with-as=/usr/ccs/bin/as --with-ld=/usr/ccs/bin/sparcv9/ld --disable-nls
--enable-threads=posix --enable-shared --with-gmp=/usr/local
--with-mpfr=/usr/local --with-mpc=/usr/local --with-isl=/usr/local
--with-build-time-tools=/usr/local/bin --with-cpu=v9 --enable-bootstrap
--enable-stage1-languages=c,c++ --enable-stage1-checking=misc
--enable-languages=ada,c,c++,fortran,go,lto,objc,obj-c++
--with-pkgversion='genunix Fri May 11 08:23:40 GMT 2018'
Thread model: posix
gcc version 8.1.0 (genunix Fri May 11 08:23:40 GMT 2018)
COLLECT_GCC_OPTIONS='-fsanitize=undefined' '-v' '-c' '-mcpu=v9'
/usr/local/gcc8/libexec/gcc/sparc64-sun-solaris2.10/8.1.0/cc1 -quiet -v
-D__arch64__ -D__sparcv9 tst.c -quiet -dumpbase tst.c -mcpu=v9 -auxbase tst
-version -fsanitize=undefined -o /var/tmp//ccI8b25O.s
GNU C17 (genunix Fri May 11 08:23:40 GMT 2018) version 8.1.0
(sparc64-sun-solaris2.10)
compiled by GNU C version 8.1.0, GMP version 6.1.2, MPFR version
4.0.1-p6, MPC version 1.1.0, isl version isl-0.19-GMP
warning: MPFR header version 4.0.1-p6 differs from library version 4.0.1.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/usr/local/gcc8/lib/gcc/sparc64-sun-solaris2.10/8.1.0/../../../../sparc64-sun-solaris2.10/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/gcc8/lib/gcc/sparc64-sun-solaris2.10/8.1.0/include
/usr/local/include
/usr/local/gcc8/include
/usr/local/gcc8/lib/gcc/sparc64-sun-solaris2.10/8.1.0/include-fixed
/usr/include
End of search list.
GNU C17 (genunix Fri May 11 08:23:40 GMT 2018) version 8.1.0
(sparc64-sun-solaris2.10)
compiled by GNU C version 8.1.0, GMP version 6.1.2, MPFR version
4.0.1-p6, MPC version 1.1.0, isl version isl-0.19-GMP
warning: MPFR header version 4.0.1-p6 differs from library version 4.0.1.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 56c9e74e9d01ca812c9fcd9ec58a5d7d
tst.c: In function 'f':
tst.c:5:1: error: unrecognizable insn:
}
^
(insn 7 6 8 2 (parallel [
(set (reg:CCXV 100 %icc)
(compare:CCXV (plus:DI (reg:DI 112)
(const_int 4096 [0x1000]))
(unspec:DI [
(reg:DI 112)
(const_int 4096 [0x1000])
] UNSPEC_ADDV)))
(set (reg:DI 111)
(plus:DI (reg:DI 112)
(const_int 4096 [0x1000])))
]) "tst.c":4 -1
(nil))
during RTL pass: vregs
tst.c:5:1: internal compiler error: in extract_insn, at recog.c:2304
0x100daff3b _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc-8.1.0/gcc/rtl-error.c:108
0x100daff73 _fatal_insn_not_found(rtx_def const*, char const*, int, char
const*)
../../gcc-8.1.0/gcc/rtl-error.c:116
0x1005e15eb extract_insn(rtx_insn*)
../../gcc-8.1.0/gcc/recog.c:2304
0x1003c0a57 instantiate_virtual_regs_in_insn
../../gcc-8.1.0/gcc/function.c:1648
0x1003c0a57 instantiate_virtual_regs
../../gcc-8.1.0/gcc/function.c:1969
0x1003c0a57 execute
../../gcc-8.1.0/gcc/function.c:2018
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
isc $
I will try this same test on Debian sid with both the previous
release gcc 9.3.0 ( Debian 9.3.0-18 ) and also the with the latest
gcc 10.2.0 (Debian 10.2.0-17) wherein I expect to see similar
results :
ceres$
ceres$ /usr/bin/gcc-9 -v -fsanitize=undefined -v -c tst.c
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc-9
Target: sparc64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 9.3.0-18'
--with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,gm2 --prefix=/usr
--with-gcc-major-version-only --program-suffix=-9
--program-prefix=sparc64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-libquadmath --disable-libquadmath-support --enable-plugin
--enable-default-pie --with-system-zlib --disable-libphobos
--enable-objc-gc=auto --enable-multiarch --disable-werror
--with-cpu-32=ultrasparc --enable-targets=all --with-long-double-128
--enable-multilib --enable-checking=release --build=sparc64-linux-gnu
--host=sparc64-linux-gnu --target=sparc64-linux-gnu
Thread model: posix
gcc version 9.3.0 (Debian 9.3.0-18)
COLLECT_GCC_OPTIONS='-v' '-fsanitize=undefined' '-v' '-c' '-mcpu=v9'
/usr/lib/gcc/sparc64-linux-gnu/9/cc1 -quiet -v -v -imultiarch
sparc64-linux-gnu -D__sparc_v9__ -D__arch64__ tst.c -quiet -dumpbase tst.c
-mcpu=v9 -auxbase tst -version -fsanitize=undefined -o
/var/tmp/dclarke/ccE9gIDO.s
GNU C17 (Debian 9.3.0-18) version 9.3.0 (sparc64-linux-gnu)
compiled by GNU C version 9.3.0, GMP version 6.2.0, MPFR version 4.1.0,
MPC version 1.2.0, isl version isl-0.22.1-GMP
warning: GMP header version 6.2.0 differs from library version 6.2.1.
GGC heuristics: --param ggc-min-expand=97 --param ggc-min-heapsize=127207
ignoring nonexistent directory "/usr/local/include/sparc64-linux-gnu"
ignoring nonexistent directory "/usr/lib/gcc/sparc64-linux-gnu/9/include-fixed"
ignoring nonexistent directory
"/usr/lib/gcc/sparc64-linux-gnu/9/../../../../sparc64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/sparc64-linux-gnu/9/include
/usr/local/include
/usr/include/sparc64-linux-gnu
/usr/include
End of search list.
GNU C17 (Debian 9.3.0-18) version 9.3.0 (sparc64-linux-gnu)
compiled by GNU C version 9.3.0, GMP version 6.2.0, MPFR version 4.1.0,
MPC version 1.2.0, isl version isl-0.22.1-GMP
warning: GMP header version 6.2.0 differs from library version 6.2.1.
GGC heuristics: --param ggc-min-expand=97 --param ggc-min-heapsize=127207
Compiler executable checksum: d73310b8041d45fee0423dc805f5c657
tst.c: In function ‘f’:
tst.c:5:1: error: unrecognizable insn:
5 | }
| ^
(insn 7 6 8 2 (parallel [
(set (reg:CCXV 100 %icc)
(compare:CCXV (plus:DI (reg:DI 113)
(const_int 4096 [0x1000]))
(unspec:DI [
(reg:DI 113)
(const_int 4096 [0x1000])
] UNSPEC_ADDV)))
(set (reg:DI 112)
(plus:DI (reg:DI 113)
(const_int 4096 [0x1000])))
]) "tst.c":4:12 -1
(nil))
during RTL pass: vregs
tst.c:5:1: internal compiler error: in extract_insn, at recog.c:2310
0xfffff80100bf2803 __libc_start_main
./csu/libc-start.c:308
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-9/README.Bugs> for instructions.
ceres$
ceres$
ceres$ /usr/bin/gcc-10 -v -fsanitize=undefined -v -c tst.c
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc-10
Target: sparc64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 10.2.0-17'
--with-bugurl=file:///usr/share/doc/gcc-10/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2 --prefix=/usr
--with-gcc-major-version-only --program-suffix=-10
--program-prefix=sparc64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new
--enable-gnu-unique-object --disable-libquadmath --disable-libquadmath-support
--enable-plugin --enable-default-pie --with-system-zlib --disable-libphobos
--enable-objc-gc=auto --enable-multiarch --disable-werror
--with-cpu-32=ultrasparc --enable-targets=all --with-long-double-128
--enable-multilib --enable-checking=release --build=sparc64-linux-gnu
--host=sparc64-linux-gnu --target=sparc64-linux-gnu
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.2.0 (Debian 10.2.0-17)
COLLECT_GCC_OPTIONS='-v' '-fsanitize=undefined' '-v' '-c' '-mcpu=v9'
/usr/lib/gcc/sparc64-linux-gnu/10/cc1 -quiet -v -v -imultiarch
sparc64-linux-gnu -D__sparc_v9__ -D__arch64__ tst.c -quiet -dumpbase tst.c
-mcpu=v9 -auxbase tst -version -fsanitize=undefined -o
/var/tmp/dclarke/ccy8GBEV.s
GNU C17 (Debian 10.2.0-17) version 10.2.0 (sparc64-linux-gnu)
compiled by GNU C version 10.2.0, GMP version 6.2.0, MPFR version
4.1.0, MPC version 1.2.0, isl version isl-0.22.1-GMP
warning: GMP header version 6.2.0 differs from library version 6.2.1.
GGC heuristics: --param ggc-min-expand=97 --param ggc-min-heapsize=127207
ignoring nonexistent directory "/usr/local/include/sparc64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/sparc64-linux-gnu/10/include-fixed"
ignoring nonexistent directory
"/usr/lib/gcc/sparc64-linux-gnu/10/../../../../sparc64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/sparc64-linux-gnu/10/include
/usr/local/include
/usr/include/sparc64-linux-gnu
/usr/include
End of search list.
GNU C17 (Debian 10.2.0-17) version 10.2.0 (sparc64-linux-gnu)
compiled by GNU C version 10.2.0, GMP version 6.2.0, MPFR version
4.1.0, MPC version 1.2.0, isl version isl-0.22.1-GMP
warning: GMP header version 6.2.0 differs from library version 6.2.1.
GGC heuristics: --param ggc-min-expand=97 --param ggc-min-heapsize=127207
Compiler executable checksum: 90178539ba1dc1edb30cf829faab698d
tst.c: In function ‘f’:
tst.c:5:1: error: unrecognizable insn:
5 | }
| ^
(insn 7 6 8 2 (parallel [
(set (reg:CCXV 100 %icc)
(compare:CCXV (plus:DI (reg:DI 113)
(const_int 4096 [0x1000]))
(unspec:DI [
(reg:DI 113)
(const_int 4096 [0x1000])
] UNSPEC_ADDV)))
(set (reg:DI 112)
(plus:DI (reg:DI 113)
(const_int 4096 [0x1000])))
]) "tst.c":4:12 -1
(nil))
during RTL pass: vregs
tst.c:5:1: internal compiler error: in extract_insn, at recog.c:2294
0xfffff80100dee803 __libc_start_main
./csu/libc-start.c:308
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-10/README.Bugs> for instructions.
ceres$
So it looks like this bug has been around for years and strangely
I didn't see it back in 2018 on Solaris sparcv9. That is odd.
--
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken
GreyBeard and suspenders optional
