From: Mark Mitchell <mark@codesourcery.com>
To: Richard Guenther <richard.guenther@gmail.com>
Cc: Hans-Peter Nilsson <hans-peter.nilsson@axis.com>, gcc@gcc.gnu.org
Subject: Re: How to stop gcc from not calling noinline functions
Date: Wed, 06 Feb 2008 23:59:00 -0000 [thread overview]
Message-ID: <47AA49D9.7010900@codesourcery.com> (raw)
In-Reply-To: <84fc9c000801120322w21679354v187fa80d2a262bc7@mail.gmail.com>
Richard Guenther wrote:
> You can apart from the other suggestions also mark the function weak
> which will prevent both inlining and pure/const analysis.
How about just writing to a volatile variable from within the callee?
void f() __attribute__((noinline)) {
volatile int i;
i = 3;
}
void g() {
f();
}
A valid GNU C compiler cannot eliminate the call to "f", as long as the
call itself is reachable.
--
Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713
next prev parent reply other threads:[~2008-02-06 23:59 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-12 8:26 Hans-Peter Nilsson
2008-01-12 9:34 ` kai-gcc
2008-01-12 10:24 ` Paolo Bonzini
2008-01-14 11:26 ` Hans-Peter Nilsson
2008-01-14 11:36 ` Dave Korn
2008-01-14 11:43 ` Jan Hubicka
2008-01-14 12:18 ` Hans-Peter Nilsson
2008-01-14 15:01 ` Dave Korn
2008-01-12 11:34 ` Richard Guenther
2008-02-06 23:59 ` Mark Mitchell [this message]
2008-02-07 1:19 ` Hans-Peter Nilsson
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