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Message #5 received at [email protected] (full text , mbox , reply ):
Subject: gcc-12: Miscompilation of attached test files, gcc-11 ok
Package: gcc-12
X-Debbugs-Cc: [email protected]
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 [email protected]
==========================================================================
"The earth is but one country, and mankind its citizens." -- Baha'u'llah
Message #10 received at [email protected] (full text , mbox , reply ):
Please could you prepare a self-contained test case, either adding the required
included files, or providing the preprocessed source?
Also, please with the recent GCC 11, 12 versions in unstable, and the GCC 13
snapshot in experimental.
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