On 22 Jan 2012, at 11:04, Sven Barth wrote:
> Ah... inside the compiler's sources. I thought you meant "the compiler
> inserts calls to prefetch in specific situations". ^^
It can also do that, if you compile it with -dprefetchnext (at least if that
still works, it's been a long time since I implemented and tried that). In that
case, it will look for constructs like this:
while assigned(hp) do
begin
...
hp:=hp^.next;
end;
and it will insert prefetch instructions like this:
while assigned(hp) do
begin
prefetch(hp^.next^);
...
hp:=hp^.next;
end;
I don't remember exactly, but I think it will also consider class fields as
implicit pointers and insert the transformation there. At least for the
compiler cycle this optimization does not change anything though.
Jonas_______________________________________________
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