[Bug middle-end/37951] -ftree-parallelize-loops=2 fails for MA57

[dennis dot wassel at googlemail dot com]

------- Comment #9 from dennis dot wassel at googlemail dot com  2009-05-04 08:45 -------
Also fails with 4.3.3 (precisely the same error message as 4.3.2)

gfortran -O2 -ftree-parallelize-loops=2 -c ma57.f -o ma57.o
ma57.f: In function 'ma57od':
ma57.f:2724: error: edge from 676 to 686 should be marked irreducible
ma57.f:2724: error: basic block 686 should be marked irreducible
ma57.f:2724: error: edge from 686 to 679 should be marked irreducible
ma57.f:2724: error: basic block 679 should be marked irreducible
ma57.f:2724: error: edge from 679 to 124 should be marked irreducible
ma57.f:2724: confused by earlier errors, bailing out

Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc-4.3.3/configure --prefix=/localdata
--program-suffix=-4.3.3 --enable-languages=c,c++,fortran --with-gmp=/localdata
--with-mpfr=/localdata --enable-version-specific-runtime-libs
Thread model: posix
gcc version 4.3.3 (GCC)
COLLECT_GCC_OPTIONS='-v' '-O2' '-ftree-parallelize-loops=2' '-c' '-o' 'ma57.o'
'-mtune=generic' '-pthread'
 /localdata/libexec/gcc/i686-pc-linux-gnu/4.3.3/f951 ma57.f -ffixed-form -quiet
-dumpbase ma57.f -mtune=generic -auxbase-strip ma57.o -O2 -version
-ftree-parallelize-loops=2 -fintrinsic-modules-path
/localdata/lib/gcc/i686-pc-linux-gnu/4.3.3/finclude -o /tmp/ccHYlhlQ.s
GNU F95 (GCC) version 4.3.3 (i686-pc-linux-gnu)
        compiled by GNU C version 4.3.3, GMP version 4.3, MPFR version
2.4.1-p5.
warning: GMP header version 4.3 differs from library version 4.3.0.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072


Is anyone interested in fixing this? I think it would not infringe the spirit
of license agreement, if I provided someone off-list with the source _for
debugging purposes only_.


-- 

dennis dot wassel at googlemail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dennis dot wassel at
                   |                            |googlemail dot com
            Version|4.3.2                       |4.3.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37951