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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/45988] gfortran.dg/vect/fast-math-pr38968.f90 times out on 32-bit Solaris 10/x86
Date: Fri, 02 Mar 2012 16:24:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45988

Rainer Orth <ro at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
   Last reconfirmed|                            |2012-03-02
                 CC|                            |ubizjak at gmail dot com
            Version|4.6.0                       |4.7.0
         Resolution|FIXED                       |
     Ever Confirmed|0                           |1

--- Comment #4 from Rainer Orth <ro at gcc dot gnu.org> 2012-03-02 16:24:24 UTC ---
I'm still seeing this bug on a particular machine, sometimes also for the
64-bit
case.

E.g. on zingana (4 x Quad-Core 2.93 GHz Intel Xeon X7350 running Solaris 10),
fast-math-pr38968.exe takes

real        1:38.46
user        1:37.61
sys            0.53

The exact same binary and libraries on arenal (8 x Dual-Core 2.593 GHz AMD
Opteron 8218 running Solaris 11) takes

real          38.09
user          37.60
sys            0.40

instead.  I've used the collect tool from the Studio 12.3 compilers to
investigate
and find that a single insn seems to dominate the runtime:

On zingana:

## 64.925    64.925             [?]   400f0c:  movaps  0x10(%rcx,%rax),%xmm1

On arenal:

## 13.810    13.810             [?]   400f0c:  movaps  0x10(%rcx,%rax),%xmm1

I'll attach the complete profiles.

  Rainer