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[Bug rtl-optimization/17950] Over Aggressive Use of Data Cache Touch Instructions During FDO
- From: "rakdver at atrey dot karlin dot mff dot cuni dot cz" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 17 Nov 2004 14:41:43 -0000
- Subject: [Bug rtl-optimization/17950] Over Aggressive Use of Data Cache Touch Instructions During FDO
- References: <20041012174801.17950.steinmtz@us.ibm.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From rakdver at atrey dot karlin dot mff dot cuni dot cz 2004-11-17 14:41 -------
Subject: Re: Over Aggressive Use of Data Cache Touch Instructions During FDO
Hello,
> I cannot reproduce this with the 20041118 CVS head on powerpc64-unknown-linux-gnu.
I think this is because speculative prefetching is now disabled by
default. You should have no problems with reproducing the bug if
you switch it on (-fspeculative-prefetching).
Zdenek
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17950