That's useful to know, thanks. Ideally I'd like to put it behind a kind
of CSE compiler flag because this will add a degree of overhead to it
and make compilation slower (currently I'm only doing it for -O3).
Currently I'm only tracking "mov (ref),%reg" and "lea (ref),%reg"
instructions and w
On 17/02/2022 20:25, J. Gareth Moreton via fpc-devel wrote:
P.S. The term "sliding window" comes from the LZ77 compression algorithm
and is used to track repeated sequences in ZIP files, among others. This
prototype optimisation essentially uses the same construct, but built
for instructions in
Hi everyone,
So I've started experimenting with a new technique in the peephole
optimizer for x86 platforms that I've named the Sliding Window. The
intention is to use it to help replace common blocks of code within a
procedure, such as pointer dereferences. So far I'm having a degree of
su
