Jonas Maebe schrieb:
On 14/01/16 17:45, Mathias wrote:
The code is machine generated.
I wanted to test which compiler is faster, the. Of FPC or C ++
C ++ could compile the code without errors.
Whether or not it can be compiled is unrelated to the language of
course, but to the compiler. We indeed only develop FPC for use with
procedures that don't have an extreme size, because that way the
compiler uses less memory and is faster. Since such massive routines
are often indeed only present in case of machine-generated code, and
since in that case you can usually easily adapt your generation to
split up the code in multiple routines, there's not much incentive to
change this (other than being able to say "yes, we can handle this").
Jonas
Some history:
The original Pascal compiler (Wirth in the 1970s) also had such an error
message
"procedure too long"; this is a well known issue for almost all compiled
languages,
and such limits hit you most of the time much earlier than physical
limits or storage
limits.
The very early versions of Turbo Pascal had the problem that the
generated code
had to fit in a 64 kB segment, so if you wanted to write programs of,
say, more than
2000 lines, you had to break it up into several overlays. And this was
another kind
of restriction, not depending on the size of individual procedures, but
on the size
of the generated code of all procedures belonging to one overlay
alltogether. When
designing your overlays carefully, you could write very large programs,
but you had
to make sure, that calls occured only inside each overlay or from the
mainline
into the overlay, but not across overlays. So the grouping of procedures
into the
overlays was tricky sometimes.
Pascal/VS on the IBM mainframe threw the error message "procedure too
long",
when the size of the generated code for the procedure exceeded 8 k, that
was the
size covered by two base registers. That was about 500 lines only. This
way you
were forced to split your procedures and functions very eary. But there
was virtually
no limit on the overall size of the program.
Kind regards
Bernd
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