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From: jakub@gcc.gnu.org
To: Daniel.Diaz@univ-paris1.fr, gcc-bugs@gcc.gnu.org,
	gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org
Subject: Re: optimization/6004: gcc 3.0.4 always compiles main() with frame (and ebp) even with -fomit-frame-pointer and -ffixed-ebp
Date: Wed, 20 Mar 2002 01:57:00 -0000	[thread overview]
Message-ID: <20020320095757.8710.qmail@sources.redhat.com> (raw)

Synopsis: gcc 3.0.4 always compiles main() with frame (and ebp) even with -fomit-frame-pointer and -ffixed-ebp

State-Changed-From-To: open->analyzed
State-Changed-By: jakub
State-Changed-When: Wed Mar 20 01:57:57 2002
State-Changed-Why:
    -fomit-frame-pointer documentation sais:
    Don't keep the frame pointer in a register for functions that
    don't need one, ...
    which means the compiler makes no guarantees it will be
    actually eliminated.
    Particularly main if it aligns the stack pointer.
    You might try
    gcc -O2 -fomit-frame-pointer -ffixed-ebp -mpreferred-stack-boundary=2 x.c
    for the .c file containing main.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6004


             reply	other threads:[~2002-03-20  9:57 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-03-20  1:57 jakub [this message]
  -- strict thread matches above, loose matches on Subject: below --
2002-04-03  2:36 rth
2002-03-19  9:36 Daniel.Diaz

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