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From: "Nuesser, Wilhelm" <wilhelm.nuesser@sap.com>
To: "'Jim Wilson'" <wilson@cygnus.com>
Cc: gcc@gcc.gnu.org
Subject: RE: Bug report optimization #4186  and ia64
Date: Tue, 25 Sep 2001 01:40:00 -0000	[thread overview]
Message-ID: <816D93CCC927D31188570008C75D1DE106DEA5F2@dbwdfx1a.wdf.sap-ag.de> (raw)

Hi,

> -----Original Message-----
> From: Jim Wilson [ mailto:wilson@cygnus.com ]
  
> I took a look at PR 4186.  It is an x86 sibling-call optimization bug.
> We accidentally overwrite one of the incoming function 
> arguments before
> reading it in the sibling call sequence.  I put this info into the PR.

Thanks a lot for your quick response. We will re-build or entire
app asap and check this.

> I think it is unlikely that the IA-64 problem is related, since the
> IA-64 does not pass arguments on the stack like the x86 does.

You're right. We checked this with -fno-optimize-sibling-calls and
- independently - with -fno-strict-aliasing as H.J. Lu suggested.
Neither of them showed any effect.

We'll have to look futher into a testcase.

Thanks
Willi

             reply	other threads:[~2001-09-25  1:40 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-09-25  1:40 Nuesser, Wilhelm [this message]
  -- strict thread matches above, loose matches on Subject: below --
2001-09-24  7:03 Willi Nüßer
2001-09-24 12:50 ` Jim Wilson

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