[Bug c/30858] New: ice for legal code with -O2 -ftree-vectorize

["dcb314 at hotmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

I just tried to compile Suse Linux package timidity-2.13.2-60
with the GNU C++ compiler version 4.3 snapshot 20070216.

The compiler said

ncurs_c.c:1196: internal compiler error: in get_initial_def_for_reduction, at
tree-vect-transform.c:1036
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

Preprocessed source code attached. Flags -O2 -ftree-vectorize required.

On the wider issue of the quality of the vectorizer, I
have thrown most of Suse Linux 10.3 at it and it has crashed
in a few places.

I suspect there would be considerable value at getting some
other distribution [ Debian ?], maybe on another type of 
machine [ PPC64 ?], and flushing out a few more bugs in the optimizer.

You would need to ensure that -ftree-vectorize was switched
on for every compile.

Just a suggestion.


-- 
           Summary: ice for legal code with -O2 -ftree-vectorize
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dcb314 at hotmail dot com
  GCC host triplet: x86_64-suse-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30858