Thread: warning: comparison of integer expressions of different signedness related to simd.h
warning: comparison of integer expressions of different signedness related to simd.h
From
Pavel Stehule
Date:
Hi
I got fresh warnings when I build an extension
In file included from /usr/local/pgsql/master/include/server/mb/pg_wchar.h:22,
from src/format.c:17:
/usr/local/pgsql/master/include/server/port/simd.h: In function ‘vector8_has’:
/usr/local/pgsql/master/include/server/port/simd.h:168:27: warning: comparison of integer expressions of different signedness: ‘int’ and ‘long unsigned int’ [-Wsign-compare]
168 | for (int i = 0; i < sizeof(Vector8); i++)
| ^
/usr/local/pgsql/master/include/server/port/simd.h: In function ‘vector8_has_le’:
/usr/local/pgsql/master/include/server/port/simd.h:219:27: warning: comparison of integer expressions of different signedness: ‘int’ and ‘long unsigned int’ [-Wsign-compare]
219 | for (int i = 0; i < sizeof(Vector8); i++)
| ^
from src/format.c:17:
/usr/local/pgsql/master/include/server/port/simd.h: In function ‘vector8_has’:
/usr/local/pgsql/master/include/server/port/simd.h:168:27: warning: comparison of integer expressions of different signedness: ‘int’ and ‘long unsigned int’ [-Wsign-compare]
168 | for (int i = 0; i < sizeof(Vector8); i++)
| ^
/usr/local/pgsql/master/include/server/port/simd.h: In function ‘vector8_has_le’:
/usr/local/pgsql/master/include/server/port/simd.h:219:27: warning: comparison of integer expressions of different signedness: ‘int’ and ‘long unsigned int’ [-Wsign-compare]
219 | for (int i = 0; i < sizeof(Vector8); i++)
| ^
[pavel@localhost plpgsql_check]$ uname -a
Linux localhost.localdomain 5.18.19-200.fc36.x86_64 #1 SMP PREEMPT_DYNAMIC Sun Aug 21 15:52:59 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
[pavel@localhost plpgsql_check]$ gcc --version
gcc (GCC) 12.2.1 20220819 (Red Hat 12.2.1-1)
Copyright (C) 2022 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.
Linux localhost.localdomain 5.18.19-200.fc36.x86_64 #1 SMP PREEMPT_DYNAMIC Sun Aug 21 15:52:59 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
[pavel@localhost plpgsql_check]$ gcc --version
gcc (GCC) 12.2.1 20220819 (Red Hat 12.2.1-1)
Copyright (C) 2022 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.
Regards
Pavel
Re: warning: comparison of integer expressions of different signedness related to simd.h
From
John Naylor
Date:
On Sat, Sep 3, 2022 at 12:30 PM Pavel Stehule <pavel.stehule@gmail.com> wrote: > > Hi > > I got fresh warnings when I build an extension > > In file included from /usr/local/pgsql/master/include/server/mb/pg_wchar.h:22, > from src/format.c:17: > /usr/local/pgsql/master/include/server/port/simd.h: In function ‘vector8_has’: > /usr/local/pgsql/master/include/server/port/simd.h:168:27: warning: comparison of integer expressions of different signedness:‘int’ and ‘long unsigned int’ [-Wsign-compare] > 168 | for (int i = 0; i < sizeof(Vector8); i++) > | ^ "int" should probably be "Size" -- does that remove the warning? -- John Naylor EDB: http://www.enterprisedb.com
Re: warning: comparison of integer expressions of different signedness related to simd.h
From
Pavel Stehule
Date:
so 3. 9. 2022 v 7:50 odesílatel John Naylor <john.naylor@enterprisedb.com> napsal:
On Sat, Sep 3, 2022 at 12:30 PM Pavel Stehule <pavel.stehule@gmail.com> wrote:
>
> Hi
>
> I got fresh warnings when I build an extension
>
> In file included from /usr/local/pgsql/master/include/server/mb/pg_wchar.h:22,
> from src/format.c:17:
> /usr/local/pgsql/master/include/server/port/simd.h: In function ‘vector8_has’:
> /usr/local/pgsql/master/include/server/port/simd.h:168:27: warning: comparison of integer expressions of different signedness: ‘int’ and ‘long unsigned int’ [-Wsign-compare]
> 168 | for (int i = 0; i < sizeof(Vector8); i++)
> | ^
"int" should probably be "Size" -- does that remove the warning?
yes, it removes warnings
Pavel
--
John Naylor
EDB: http://www.enterprisedb.com
Re: warning: comparison of integer expressions of different signedness related to simd.h
From
Tom Lane
Date:
John Naylor <john.naylor@enterprisedb.com> writes:
> On Sat, Sep 3, 2022 at 12:30 PM Pavel Stehule <pavel.stehule@gmail.com> wrote:
>> /usr/local/pgsql/master/include/server/port/simd.h: In function ‘vector8_has’:
>> /usr/local/pgsql/master/include/server/port/simd.h:168:27: warning: comparison of integer expressions of different
signedness:‘int’ and ‘long unsigned int’ [-Wsign-compare]
>> 168 | for (int i = 0; i < sizeof(Vector8); i++)
> "int" should probably be "Size" -- does that remove the warning?
Agreed, should be Size or size_t, or else cast the sizeof() result.
But I wonder why none of the buildfarm is showing such a warning.
regards, tom lane
Re: warning: comparison of integer expressions of different signedness related to simd.h
From
Pavel Stehule
Date:
so 3. 9. 2022 v 7:57 odesílatel Tom Lane <tgl@sss.pgh.pa.us> napsal:
John Naylor <john.naylor@enterprisedb.com> writes:
> On Sat, Sep 3, 2022 at 12:30 PM Pavel Stehule <pavel.stehule@gmail.com> wrote:
>> /usr/local/pgsql/master/include/server/port/simd.h: In function ‘vector8_has’:
>> /usr/local/pgsql/master/include/server/port/simd.h:168:27: warning: comparison of integer expressions of different signedness: ‘int’ and ‘long unsigned int’ [-Wsign-compare]
>> 168 | for (int i = 0; i < sizeof(Vector8); i++)
> "int" should probably be "Size" -- does that remove the warning?
Agreed, should be Size or size_t, or else cast the sizeof() result.
But I wonder why none of the buildfarm is showing such a warning.
I got this warning when I compiled plgsql_check against master with enabled asserts
In file included from /usr/local/pgsql/master/include/server/mb/pg_wchar.h:22,
from src/format.c:17:
/usr/local/pgsql/master/include/server/port/simd.h: In function ‘vector8_has_le’:
/usr/local/pgsql/master/include/server/port/simd.h:219:27: warning: comparison of integer expressions of different signedness: ‘int’ and ‘long unsigned int’ [-Wsign-compare]
219 | for (int i = 0; i < sizeof(Vector8); i++)
| ^
from src/format.c:17:
/usr/local/pgsql/master/include/server/port/simd.h: In function ‘vector8_has_le’:
/usr/local/pgsql/master/include/server/port/simd.h:219:27: warning: comparison of integer expressions of different signedness: ‘int’ and ‘long unsigned int’ [-Wsign-compare]
219 | for (int i = 0; i < sizeof(Vector8); i++)
| ^
regards, tom lane
Re: warning: comparison of integer expressions of different signedness related to simd.h
From
John Naylor
Date:
On Sat, Sep 3, 2022 at 12:57 PM Tom Lane <tgl@sss.pgh.pa.us> wrote: > > John Naylor <john.naylor@enterprisedb.com> writes: > > On Sat, Sep 3, 2022 at 12:30 PM Pavel Stehule <pavel.stehule@gmail.com> wrote: > >> /usr/local/pgsql/master/include/server/port/simd.h: In function ‘vector8_has’: > >> /usr/local/pgsql/master/include/server/port/simd.h:168:27: warning: comparison of integer expressions of different signedness:‘int’ and ‘long unsigned int’ [-Wsign-compare] > >> 168 | for (int i = 0; i < sizeof(Vector8); i++) > > > "int" should probably be "Size" -- does that remove the warning? > > Agreed, should be Size or size_t, or else cast the sizeof() result. > But I wonder why none of the buildfarm is showing such a warning. If I add -Wsign-compare to CPPFLAGS, I get dozens of warnings all over the place. It's probably unreasonable for extensions to expect to compile cleanly with warnings that the core server doesn't use, but this header is clearly wrong and easy to remedy, so I've pushed a patch. -- John Naylor EDB: http://www.enterprisedb.com