Re: warning: comparison of integer expressions of different signedness related to simd.h

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

https://github.com/okbob/plpgsql_check

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++)
      |                           ^





>                         regards, tom lane
>