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

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: John Naylor <john(dot)naylor(at)enterprisedb(dot)com>
Cc: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: warning: comparison of integer expressions of different signedness related to simd.h
Date: 2022-09-03 05:57:32
Message-ID: 1311246.1662184652@sss.pgh.pa.us
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John Naylor <john(dot)naylor(at)enterprisedb(dot)com> writes:
> On Sat, Sep 3, 2022 at 12:30 PM Pavel Stehule <pavel(dot)stehule(at)gmail(dot)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

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