Both clang and gcc seem to do this
> On 30/06/2022 17:28 CEST J. Gareth Moreton via fpc-devel > <fpc-devel@lists.freepascal.org> wrote: > > > This was what I was working on: > > https://gitlab.com/freepascal.org/fpc/source/-/merge_requests/252 > > The same question applies regarding the TEST instruction, but it's a > little more restrictive in this instance in that it's determined that > the program doesn't care about the upper bytes of the register once the > optimisation is made, so "testl $1,%ebx" is indeed the same as "testb > $1,%bl" due to previous logic, but I am wondering if a penalty might be > incurred due to the partial read or if this is only a concern for > partial writes. > > Gareth aka. Kit > > > -- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > _______________________________________________ > fpc-devel maillist - fpc-devel@lists.freepascal.org > https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel
