[Bug target/47312] New: [4.6 Regression] ICE: in expand_ternary_op, at optabs.c:656 with -flto -mno-sse -mxop and __builtin_fmaf()

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47312

           Summary: [4.6 Regression] ICE: in expand_ternary_op, at
                    optabs.c:656 with -flto -mno-sse -mxop and
                    __builtin_fmaf()
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


------ testcase.c -------
int main ()
{
  return __builtin_fmaf(1e+38F, 1e+38F, 0);
}
-------------------------

Compiler output:
$ gcc -O -flto -mno-sse -mxop testcase.c 
In file included from testcase.c:1:0,
                 from :0:
testcase.c: In function 'main':
testcase.c:3:24: internal compiler error: in expand_ternary_op, at optabs.c:656
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
lto-wrapper:
/mnt/svn/gcc-trunk/binary-168843-lto-fortran-checking-yes-rtl-df/bin/gcc
returned 1 exit status
collect2: lto-wrapper returned 1 exit status

Tested revisions:
r168843 - crash
4.5 r168785 - OK