[Bug fortran/16173] New: this code does not compile with -O3; owever, it compiles with -O option

["alomar at eng dot kuniv dot edu dot kw" <gcc-bugzilla at gcc dot gnu dot org>]

After installation of Lucents port3 library. One of the test programs (prac.f) failed to compile under the 
-O3 option; however, it compiled fine with the -O option.
The following output was observed on my dual PowerPC G5 running MacOSX 10.3.4
g77 -v -save-temps -O3 prac.f ../libport.a
Driving: g77 -v -save-temps -O3 prac.f ../libport.a -lfrtbegin -lg2c
Reading specs from /sw/lib/gcc/powerpc-apple-darwin7.2.0/3.4/specs
Configured with: ../gcc-3.4-20031015/configure --prefix=/sw --enable-languages=f77 --infodir=/
share/info --libexecdir=/lib
Thread model: posix
gcc version 3.4 20031015 (experimental)
 /sw/lib/gcc/powerpc-apple-darwin7.2.0/3.4/f771 prac.f -fPIC -quiet -dumpbase prac.f -auxbase 
prac -O3 -version -o prac.s
GNU F77 version 3.4 20031015 (experimental) (powerpc-apple-darwin7.2.0)
        compiled by GNU C version 3.4 20031015 (experimental).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
prac.f: In subroutine `sgets':
In file included from prac.f:0:
prac.f:362: internal compiler error: Bus error
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

-- 
           Summary: this code does not compile with -O3; owever, it compiles
                    with -O option
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: alomar at eng dot kuniv dot edu dot kw
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: powerpc-apple-darwin7.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16173