Subject: gcc-12: Miscompilation of attached test files, gcc-11 ok
Package: gcc-12
X-Debbugs-Cc: c...@debian.org
Version: 12.2.0-9
Severity: important
This prevents GCL using gcc-12.....
=============================================================================
File: t.c
=============================================================================
#include <stdio.h>
#define fixnum long
#define ufixnum unsigned long
fixnum
foo(fixnum i,fixnum x) {
printf("foo\n");
return x;
}
fixnum
bar(fixnum x) {
printf("bar\n");
return x;
}
struct fixn {
fixnum d;
fixnum FIXVAL;
};
union lu {
struct fixn FIX;
};
typedef union lu *object;
extern object fixnum_add(fixnum,fixnum);
extern object make_fixnum1(fixnum);
object
baz(object x) {
{
fixnum fx=({register object _q2=(x);
register fixnum _q3;
_q3=(((ufixnum)(_q2))>=0x8000000000000000) ?
((fixnum)(((fixnum)(_q2))-(0x8000000000000000
+(0x4000000000000000>>1)))) :
(_q2)->FIX.FIXVAL;
_q3;});
return fx==( - ((long)((((unsigned long)1)<<((8*8)-1))-1)) - 1 ) ?
fixnum_add(1,((long)((((unsigned long)1)<<((8*8)-1))-1))) :
(fx<0 ?
({register fixnum _q1=(-fx);
register object _q4;
_q4=(!(((_q1)+(0x4000000000000000>>1))&-0x4000000000000000)) ?
((object)((_q1)+(0x8000000000000000 +(0x4000000000000000>>1)))) :
make_fixnum1(_q1);
_q4;}) :
x);
}
}
int
main(int argc,char * argv[]) {
fixnum fx;
union lu u;
sscanf(argv[1],"%ld",&fx);
u.FIX.FIXVAL=fx;
printf("%p\n",baz(&u));
return 0;
}
=============================================================================
File: tt.c
=============================================================================
#include <stdio.h>
#define fixnum long
struct fixn {
fixnum d;
fixnum FIXVAL;
};
union lu {
struct fixn FIX;
};
typedef union lu *object;
object
fixnum_add(fixnum x,fixnum y) {
static union lu u;
u.FIX.FIXVAL=1;
printf("add\n");
return &u;
}
object
make_fixnum1(fixnum x) {
static union lu u;
u.FIX.FIXVAL=x;
printf("make\n");
return &u;
}
=============================================================================
Transcript:
=============================================================================
(sid_amd64-dchroot)camm@barriere:~$ gcc-12 -c -g
-ffile-prefix-map=/home/camm/gcl-2.6.12=. -fstack-protector-strong -Wformat
-Werror=format-security -fsigned-char -pipe -fcommon -fno-builtin-malloc
-fno-builtin-free -fno-PIE -fno-pie -fno-PIC -fno-pic -Wall -Wno-empty-body
-Wno-unused-but-set-variable -I/usr/include/tirpc -pg -Wdate-time
-D_FORTIFY_SOURCE=2 -O2 -I/home/camm/gcl-2.6.12/o -I../h -I../gcl-tk tt.c
(sid_amd64-dchroot)camm@barriere:~$ gcc-12 -c -g
-ffile-prefix-map=/home/camm/gcl-2.6.12=. -fstack-protector-strong -Wformat
-Werror=format-security -fsigned-char -pipe -fcommon -fno-builtin-malloc
-fno-builtin-free -fno-PIE -fno-pie -fno-PIC -fno-pic -Wall -Wno-empty-body
-Wno-unused-but-set-variable -I/usr/include/tirpc -pg -Wdate-time
-D_FORTIFY_SOURCE=2 -O2 -I/home/camm/gcl-2.6.12/o -I../h -I../gcl-tk t.c
(sid_amd64-dchroot)camm@barriere:~$ gcc-12 -Wl,-no-pie t.o tt.o -o t
(sid_amd64-dchroot)camm@barriere:~$ ./t -8874444426961747968
0x1b285c3000000000
(sid_amd64-dchroot)camm@barriere:~$ gcc-11 -c -g
-ffile-prefix-map=/home/camm/gcl-2.6.12=. -fstack-protector-strong -Wformat
-Werror=format-security -fsigned-char -pipe -fcommon -fno-builtin-malloc
-fno-builtin-free -fno-PIE -fno-pie -fno-PIC -fno-pic -Wall -Wno-empty-body
-Wno-unused-but-set-variable -I/usr/include/tirpc -pg -Wdate-time
-D_FORTIFY_SOURCE=2 -O2 -I/home/camm/gcl-2.6.12/o -I../h -I../gcl-tk t.c
(sid_amd64-dchroot)camm@barriere:~$ gcc-12 -Wl,-no-pie t.o tt.o -o t
(sid_amd64-dchroot)camm@barriere:~$ ./t -8874444426961747968
make
0x404050
(sid_amd64-dchroot)camm@barriere:~$ gcc-12 -c -g
-ffile-prefix-map=/home/camm/gcl-2.6.12=. -fstack-protector-strong -Wformat
-Werror=format-security -fsigned-char -pipe -fcommon -fno-builtin-malloc
-fno-builtin-free -fno-PIE -fno-pie -fno-PIC -fno-pic -Wall -Wno-empty-body
-Wno-unused-but-set-variable -I/usr/include/tirpc -pg -Wdate-time
-D_FORTIFY_SOURCE=2 -O2 -I/home/camm/gcl-2.6.12/o -I../h -I../gcl-tk t.c
(sid_amd64-dchroot)camm@barriere:~$ gcc-12 -Wl,-no-pie t.o tt.o -o t
(sid_amd64-dchroot)camm@barriere:~$ ./t -8874444426961747968
0x1b285c3000000000
=============================================================================
-- System Information:
Debian Release: bookworm/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'unstable')
merged-usr: no
Architecture: amd64 (x86_64)
Kernel: Linux 5.10.0-19-amd64 (SMP w/4 CPU threads)
Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: unable to detect
Versions of packages gcc-12 depends on:
ii binutils 2.39-8
ii cpp-12 12.2.0-9
ii gcc-12-base 12.2.0-9
ii libc6 2.36-4
ii libcc1-0 12.2.0-9
ii libgcc-12-dev 12.2.0-9
ii libgcc-s1 12.2.0-9
ii libgmp10 2:6.2.1+dfsg1-1.1
ii libisl23 0.25-1
ii libmpc3 1.2.1-2
ii libmpfr6 4.1.0-3
ii libstdc++6 12.2.0-9
ii libzstd1 1.5.2+dfsg-1
ii zlib1g 1:1.2.13.dfsg-1
Versions of packages gcc-12 recommends:
ii libc6-dev 2.36-4
Versions of packages gcc-12 suggests:
pn gcc-12-doc <none>
pn gcc-12-locales <none>
pn gcc-12-multilib <none>
-- no debconf information
--
Camm Maguire c...@maguirefamily.org
==========================================================================
"The earth is but one country, and mankind its citizens." -- Baha'u'llah
