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
