[Bug fortran/37401] New: ICE when compiling some LAPACK files with optimizations

[Bug fortran/37401] New: ICE when compiling some LAPACK files with optimizations

[jean-louis dot dornstetter at wanadoo dot fr]

Compiling some of the LAPACK source code under -O1 or greater with the 64 bit
version of GNU Fortran 4.4.0 fails badly (whereas its peer 32 bit build does
not exhibit the problem).

The Windows build of gfortran is current from
<http://gcc.gnu.org/wiki/GFortranBinaries> as of Sep 6, 2008:
<http://quatramaran.ens.fr/~coudert/gfortran/gfortran-win64.zip>

gfortran -v:
Using built-in specs.
Target: x86_64-pc-mingw32
Configured with: ../../trunk/configure --prefix=/home/FX/irun64
--build=i586-pc-mingw32 --target=x86_64-pc-mingw32 --with-gmp=/home/FX/local
--enable-languages=c,fortran --disable-werror --disable-nls --enable-threads
Thread model: win32
gcc version 4.4.0 20080421 (experimental) [trunk revision 134506] (GCC)

Similar problems occur with numerous .f source files dealing with COMPLEX
versions of routines, the list of offending files within the current 3.1.1
version of LAPACK is provided later, one of them is chdet2.f:

Fine at optimization level 0 :
G:\lapack\SRC>gfortran -c -O0 chetd2.f

Things get weird here:
G:\lapack\SRC>gfortran -c -O1 chetd2.f
chetd2.f: In function 'chetd2':
chetd2.f:254: internal compiler error: in reg_overlap_mentioned_p, at
rtlanal.c:1398
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

G:\lapack\SRC>gfortran -c -O2 chetd2.f
chetd2.f: In function 'chetd2':
chetd2.f:254: error: invalid rtl sharing found in the insn
(insn 688 687 689 14 chetd2.f:190 (set (subreg:DI (reg:SC 191) 0)
        (reg:DI 427)) -1 (nil))
chetd2.f:254: error: shared rtx
(subreg:DI (reg:SC 191) 0)
chetd2.f:254: internal compiler error: internal consistency failure
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

The list of files that trigger similar problems in LAPACK 3.1.1 is provided
below, with the ancilliary TIMING utilities folder located at the same level as
SRC (none of the TESTING files seem to disturb the compiler):

\SRC\cgbcon.f
\SRC\chetd2.f
\SRC\chetri.f
\SRC\chgeqz.f
\SRC\chpgst.f
\SRC\chptrd.f
\SRC\chptri.f
\SRC\claein.f
\SRC\claesy.f
\SRC\clahqr.f
\SRC\claic1.f
\SRC\clapll.f
\SRC\claqr0.f
\SRC\claqr4.f
\SRC\clarfg.f
\SRC\clarnv.f
\SRC\clatbs.f
\SRC\clatdf.f
\SRC\clatps.f
\SRC\clatrd.f
\SRC\clatrs.f
\SRC\clauu2.f
\SRC\cpotf2.f
\SRC\cpptrf.f
\SRC\cpptri.f
\SRC\csptri.f
\SRC\csytri.f
\SRC\ctgevc.f
\SRC\ctgsna.f
\SRC\ctrsna.f
\SRC\ctrsyl.f
\TIMING\EIG\clatm4.f
\TIMING\EIG\ctim26.f
\TIMING\EIG\ctim51.f
\TIMING\EIG\ceispack.f
\TIMING\EIG\EIGSRC\chgeqz.f
\TIMING\EIG\EIGSRC\claein.f
\TIMING\EIG\EIGSRC\clahqr.f
\TIMING\EIG\EIGSRC\clarrv.f
\TIMING\EIG\EIGSRC\ctgevc.f
\TIMING\LIN\ctimmg.f
\TIMING\LIN\clinpk.f
\TIMING\LIN\LINSRC\claic1.f


-- 
           Summary: ICE when compiling some LAPACK files with optimizations
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jean-louis dot dornstetter at wanadoo dot fr
 GCC build triplet: i586-pc-mingw32
  GCC host triplet: x86_64-pc-mingw32
GCC target triplet: x86_64-pc-mingw32


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37401

[Bug target/37401] ICE when compiling some LAPACK files with optimizations

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2008-09-06 23:08 -------
Can you attach the .f files?


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|major                       |normal
          Component|fortran                     |target


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37401

[Bug target/37401] ICE when compiling some LAPACK files with optimizations

[jean-louis dot dornstetter at wanadoo dot fr]

------- Comment #2 from jean-louis dot dornstetter at wanadoo dot fr  2008-09-07 01:02 -------
Created an attachment (id=16246)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16246&action=view)
Offending F77 sources files for bug 37401

I did not do my duties, sorry for that... The attached ZIP archive contains
FORTRAN source files that trigger ICE's. For some of the files, loop unrolling
is required. See the README file and the tiny batch files that should allow
full reproduction of the problem.

Best regards


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37401

[Bug target/37401] ICE when compiling some LAPACK files with optimizations

[ubizjak at gmail dot com]

------- Comment #3 from ubizjak at gmail dot com  2008-09-08 09:02 -------
All tests work OK with a cross from linux to x86_64-pc-mingw32 as of version

GNU Fortran (GCC) version 4.4.0 20080908 (experimental) [trunk revision 140099]
(x86_64-pc-mingw32)

Please ask gfortran community to provide newer Windows binaries.


-- 

ubizjak at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |WORKSFORME


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37401