Do orphan procedures get compiled?

[Seymour Clufley]

If a procedure is not linked (directly or via a chain of procedures) to the main program code, does it get included in the compiled exe or is it left out, to reduce filesize?

What about structures that are never used, etc.?

[Kaeru Gaman]

I'm not sure if it is solved meanwhile...

in earlier versions, procedures that were never called were left out,
Procedures that were called from Procedures were implemented,
even if the calling Procedure was never called.

there are plugins/preparser to deal with that, I think...


Structures are not at all implemented in the exe in a form that needs memory,
they are only a construct to describe complex offset combinations in a way readable for Humans.

[blueznl]

They do get compiled under 4.20, I think...

Creating an executable with 4.20 and this:

Code: Select all

; IncludeFile "c:\software\purebasic\_projects\x_lib\x_lib.pb"
a = 1
Debug "Ok"

... resulted in a file of 3.584 bytes.

Using this:

Code: Select all

IncludeFile "c:\software\purebasic\_projects\x_lib\x_lib.pb"
a = 1
Debug "Ok"

... resulted in an executable of 68096 bytes.

4.30's exe was about 600 bytes larger.

(Still not bad realizing that x_lib is about 5000 lines. And before someone asks: everything in that file x_lib is enclosed in procedures so should not add to exe size unless procedures are included.)

[srod]

Generally speaking procedures which are not referenced at all will not be included in the final exe.

Consider the following :

Code: Select all

Procedure test1()
  a+1
EndProcedure

Procedure test2()
  a+1
EndProcedure

a + 5

In this case neither function will be included in the final exe because neither is referenced anywhere in the code.

However, in the following code :

Code: Select all

Procedure test1()
  a+1
EndProcedure

Procedure test2()
  a+1
  test1()
EndProcedure

a + 5

the procedure test1() will be included in the final exe even though it is only referenced within test2() which itself will not be included in the final exe.

[PB]

@srod: The following example has DeleteFileA and MessageBoxA in the final
exe, but I don't know whether the procedure code is included or just the API
headers:

Code: Select all

Procedure test1()
  DeleteFile(a$)
EndProcedure

Procedure test2()
  MessageRequester("","")
EndProcedure

a + 5

[srod]

Just the stubs (taken from the relevant import libraries) are included. This is because PB's generated ASM is declaring the appropriate external symbols.