[Bug middle-end/30784] New: ICE on loop vectorization (-O1 -march=athlon-xp -ftree-vectorize)

["fxcoudert at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

$ cat a.c
void foo(void)
{
  static int irows[50000];
  int i;

  for (i = 1; i < 1000; i++)
    irows[i-1] = i;
}

$ gcc -c -O1 -march=athlon-xp -ftree-vectorize a.c
a.c: In function ?foo?:
a.c:8: internal compiler error: in expand_simple_binop, at optabs.c:1192
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

$ gcc -v                      
Using built-in specs.
Target: i386-pc-linux-gnu
Configured with: /home/fxcoudert/gfortran_nightbuild/trunk/configure
--prefix=/home/fxcoudert/gfortran_nightbuild/irun-20070209
--enable-languages=c,fortran --host=i386-pc-linux-gnu --enable-checking=release
--with-gmp=/home/fxcoudert/gfortran_nightbuild/software
Thread model: posix
gcc version 4.3.0 20070209 (experimental)


The original bug report (http://gcc.gnu.org/ml/fortran/2007-02/msg00288.html)
was about the follow Fortran code:

      subroutine gaussj2_cvb(n)
      dimension irows(n)
      do 100 i=1,n
100   irows(i)=i
      end

When someone fixes this, can you verify that the ICE is also gone on the
Fortran code (same optimization options)?


-- 
           Summary: ICE on loop vectorization (-O1 -march=athlon-xp -ftree-
                    vectorize)
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: fxcoudert at gcc dot gnu dot org
 GCC build triplet: i386-pc-linux-gnu
  GCC host triplet: i386-pc-linux-gnu
GCC target triplet: i386-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30784