[Bug rtl-optimization/25569] [4.2 Regression] FAIL: gfortran.dg/g77/20010610.f -O3 -fomit-frame-pointer -funroll-loops

["law at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #7 from law at redhat dot com  2006-03-13 21:17 -------
Subject: Re:  [4.2 Regression] FAIL:
        gfortran.dg/g77/20010610.f  -O3 -fomit-frame-pointer -funroll-loops

On Wed, 2006-03-08 at 00:07 +0000, janis at gcc dot gnu dot org wrote:
> 
> ------- Comment #5 from janis at gcc dot gnu dot org  2006-03-08 00:07 -------
> A regression hunt on powerpc64-linux using the C test case from comment #4
> identified this patch:
> 
> http://gcc.gnu.org/viewcvs?view=rev&rev=110705
> 
> r110705 | law | 2006-02-07 18:31:27 +0000 (Tue, 07 Feb 2006)
> 
> 
> That date doesn't match up with when the Fortran test started failing so I ran
> another regression hunt using it, which identified this patch:
> 
> http://gcc.gnu.org/viewcvs?view=rev&rev=108425
> 
> r108425 | law | 2005-12-12 19:59:16 +0000 (Mon, 12 Dec 2005)
What I suspect is going on here is that we've got a latent
bug in the RTL IV code.  The patches referenced above merely
expose instances of that underlying latent bug.

I'm still trying to learn my way around the RTL IV code, if
I can't figure it out pretty quickly I'll have to hand this off
to Zdenek.

jeff


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25569