[Bug rtl-optimization/59477] New: [4.8/4.9 Regression] ICE: in assign_by_spills, at lra-assigns.c:1281 with -O

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59477

            Bug ID: 59477
           Summary: [4.8/4.9 Regression] ICE: in assign_by_spills, at
                    lra-assigns.c:1281 with -O
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz

Created attachment 31422
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31422&action=edit
partially reduced testcase

Compiler output:
$ gcc -O testcase.C         
testcase.C: In function 'void test1(_Bit_iterator)':
testcase.C:90:1: internal compiler error: in assign_by_spills, at
lra-assigns.c:1281
 }
 ^
0xb697f3 assign_by_spills
        /mnt/svn/gcc-trunk/gcc/lra-assigns.c:1281
0xb6a57b lra_assign()
        /mnt/svn/gcc-trunk/gcc/lra-assigns.c:1439
0xb65ac2 lra(_IO_FILE*)
        /mnt/svn/gcc-trunk/gcc/lra.c:2361
0xb13656 do_reload
        /mnt/svn/gcc-trunk/gcc/ira.c:5455
0xb13656 rest_of_handle_reload
        /mnt/svn/gcc-trunk/gcc/ira.c:5584
0xb13656 execute
        /mnt/svn/gcc-trunk/gcc/ira.c:5613
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.


$ /mnt/svn/gcc-trunk/binary-latest/bin/gcc -v           
Using built-in specs.
COLLECT_GCC=/mnt/svn/gcc-trunk/binary-latest/bin/gcc
COLLECT_LTO_WRAPPER=/mnt/svn/gcc-trunk/binary-205881-lto-fortran-checking-yes-rtl-df/libexec/gcc/x86_64-unknown-linux-gnu/4.9.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /mnt/svn/gcc-trunk//configure --enable-checking=yes,rtl,df
--enable-languages=c,c++,lto,fortran
--prefix=/mnt/svn/gcc-trunk/binary-205881-lto-fortran-checking-yes-rtl-df/
--without-cloog --without-ppl
Thread model: posix
gcc version 4.9.0 20131211 (experimental) (GCC) 


Tested revisions:
r205881 - crash
4.8 r204890 - crash
4.7 r204889 - OK