[Bug other/52115] New: ICE: verify_ssa failed (missing definition for SSA_NAME)

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52115

             Bug #: 52115
           Summary: ICE: verify_ssa failed (missing definition for
                    SSA_NAME)
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: gjl@gcc.gnu.org
            Target: avr


This is a new failure observed in 4.7 trunk r183874.  r183341 worked fine.

Source:
./gcc/testsuite/gcc.c-torture/compile/pr44891.c

http://gcc.gnu.org/viewcvs/trunk/gcc/testsuite/gcc.c-torture/compile/pr44891.c?revision=183874&content-type=text%2Fplain&view=co

Command line:

avr-gcc pr44891.c -S -O1 -v

Configured with: ../../gcc.gnu.org/trunk/configure --target=avr
--prefix=/gnu/install/gcc-4.7 --disable-nls --enable-languages=c,c++
--with-dwarf2 --enable-checking=yes,rtl

GNU C (GCC) version 4.7.0 20120203 (experimental) (avr)
        compiled by GNU C version 4.3.2 [gcc-4_3-branch revision 141291], GMP
version 4.3.2, MPFR version 2.4.2, MPC version 0.8.2


ICE:

pr44891.c: In function 'foo':
pr44891.c:26:1: error: missing definition
for SSA_NAME: D.1329_5 in statement:
gf.0_6 = D.1329_5 + 3.2999999523162841796875e+0;
pr44891.c:26:1: internal compiler error: verify_ssa failed