[fpc-devel] Binary size discrepancy with -a

[Alexander Grotewohl]

would -a disable optimizations? i guess it'd depend on the intended use of the listings it generated

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Alexander Grotewohl
https://dcclost.com

________________________________
From: fpc-devel <fpc-devel-bounces at lists.freepascal.org> on behalf of J. Gareth Moreton <gareth at moreton-family.com>
Sent: Saturday, July 18, 2020 11:09:29 PM
To: FPC developers' list <fpc-devel at lists.freepascal.org>
Subject: [fpc-devel] Binary size discrepancy with -a

Hi everyone,

I've noticed something a bit weird with the Free Pascal Compiler when
you use the the -a option to dump the compiled assembly files... the
resultant binaries are sometimes smaller.  I recently tried it with
Lazarus under x86_64-win64 (using "make distclean all install" with FPCOPT):

(-O4 -OoCONSTPROP)
241,010,289 bytes - lazarus.exe

(-a -O4 -OoCONSTPROP)
235,655,062 bytes - lazarus.exe

Anyone else noticed this? Logically, shoudn't the EXE files be
completely identical?

Gareth aka. Kit


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