[Bug target/35079] New: [arm] ICE (segfault) with gfortran -O3 -funroll-loops

[Bug target/35079] New: [arm] ICE (segfault) with gfortran -O3 -funroll-loops

[debian-gcc at lists dot debian dot org]

The attached code (from lapack) segfaults gfortran trunk 20080116 with -O3
-funroll-loops, succeeds without -funroll-loops.

$ gfortran-4.3  -funroll-loops -save-temps  -O3 -c seispack.f
seispack.f: In function 'invit':
seispack.f:1742: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.


-- 
           Summary: [arm] ICE (segfault) with gfortran -O3 -funroll-loops
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: debian-gcc at lists dot debian dot org
GCC target triplet: arm-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35079

[Bug target/35079] [arm] ICE (segfault) with gfortran -O3 -funroll-loops

[debian-gcc at lists dot debian dot org]

------- Comment #1 from debian-gcc at lists dot debian dot org  2008-02-04 17:24 -------
Created an attachment (id=15094)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15094&action=view)
code


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35079

[Bug target/35079] [arm] ICE (segfault) with gfortran -O3 -funroll-loops

[kmccarty at debian dot org]

------- Comment #2 from kmccarty at debian dot org  2008-03-21 17:06 -------
Hi gfortran developers,

I can confirm that this ICE still happens on arm with gfortran 4.3 rc2 [*], and
with the optimization reduced to -O2 (-funroll-loops -O1 is OK, as is -O3
without -funroll-loops).

[*] This is on a machine that I don't administer so unfortunately I cannot test
with the very latest gfortran.

(sid)kmccarty@agnesi:~$ gfortran-4.3 -v
Using built-in specs.
Target: arm-linux-gnu
Configured with: ../src/configure linux gnu
Thread model: posix
gcc version 4.3.0 20080301 (prerelease) [gcc-4_3-branch revision 132801]
(Debian 4.3.0~rc2-1)

(sid)kmccarty@agnesi:~$ gfortran-4.3 -funroll-loops -O2 -c seispack.f
seispack.f: In function 'invit':
seispack.f:1742: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.3/README.Bugs> for instructions.

I have also observed a similar ICE, which could very well be the same bug, with
a smaller FORTRAN file "ranecu.F" that may be easier to run tests on.  In that
case the ICE occurs with -funroll-loops and with optimization as low as -O1.

That ICE I have reported in Debian's BTS at http://bugs.debian.org/466791 --
and I prepared a simple test case for it at
http://people.debian.org/~kmccarty/arm-ICE-test.tar.gz .  (The .f and .s files
in that tarball were generated by gfortran from svn 20080202, Debian package
version 4.3-20080202-1, but since the ICE still occurs I'm guessing this
doesn't matter so much, and you can easily regenerate them with the Makefile in
the test case tarball.)

best regards,

Kevin McCarty


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kmccarty at debian dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kmccarty at debian dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35079

[Bug target/35079] [arm] ICE (segfault) with gfortran -O3 -funroll-loops

[ramana at gcc dot gnu dot org]

------- Comment #3 from ramana at gcc dot gnu dot org  2009-05-27 13:01 -------
I just tried this with gfortran 4.3.3 that I have on my ubuntu box. I don't get
a failure with arm-linux-gnueabi. Can you verify that this still exists with
arm-linux configurations ?

Thanks.


-- 

ramana at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35079

[Bug target/35079] [arm] ICE (segfault) with gfortran -O3 -funroll-loops

[mikpe at it dot uu dot se]

------- Comment #4 from mikpe at it dot uu dot se  2009-05-28 08:40 -------
(In reply to comment #3)
> I just tried this with gfortran 4.3.3 that I have on my ubuntu box. I don't get
> a failure with arm-linux-gnueabi. Can you verify that this still exists with
> arm-linux configurations ?

This problem looks like a dupe of PR35964 and PR39076. If so then it's probably
fixed in current 4.3 branch, and Debian used to backport the fix to their 4.3
compilers which may be why it appears fixed on Ubuntu.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35079

[Bug target/35079] [arm] ICE (segfault) with gfortran -O3 -funroll-loops

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35079

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |FIXED

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-10 18:40:23 UTC ---
Assuming fixed.