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Re: kind of regression -fprofile-* between r126538 and r126587
- From: Janis Johnson <janis187 at us dot ibm dot com>
- To: Thomas Veith <xtv at veith-web dot com>
- Cc: gcc at gcc dot gnu dot org
- Date: Mon, 16 Jul 2007 17:02:06 -0700
- Subject: Re: kind of regression -fprofile-* between r126538 and r126587
- References: <Pine.LNX.firstname.lastname@example.org>
- Reply-to: janis187 at us dot ibm dot com
On Thu, 2007-07-12 at 20:54 +0200, Thomas Veith wrote:
> Hi *,
> when compiling crafty-20.14 with
> CFLAGS='$(CFLAGS) -Wall -pipe -D_REENTRANT -march=i686 -O3 \
> -fprofile-use -fbranch-probabilities -fomit-frame-pointer \
> -ftree-vectorize -ftree-vectorizer-verbose=1 -msse2 \
> -fno-gcse -mpreferred-stack-boundary=2'
> with rev. 125687 crafty breaks severly -- with rev. 126538 it compiles and
> runs smoothly.
How does it break? I tried building crafty from SPEC CPU2000 on
powerpc-linux with -fprofile-generate/-use and various other
optimizations with current mainline and found that with feedback
plus -O1 the resulting program hangs with the test (short) input.
> As you can see, there are a lot of options involved and crafty is a big
> program so I'm not able to provide a reduced testcase and file a PR in
> bugzilla. But maybe someone can take this as a hint.
I don't have time right now to look into it, either.