[Bug debug/48459] [4.6/4.7 Regression] avr: Assertion failure with -gdwarf-2

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48459

Richard Henderson <rth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED

--- Comment #20 from Richard Henderson <rth at gcc dot gnu.org> 2011-06-14 13:23:53 UTC ---
(In reply to comment #19)
> > A full build for AVR fails, but that seems to be related to other
> > open bugs.
> 
> What bugs? 

Perhaps I shouldn't assume.

../../../../../../comb/newlib/libc/search/hash.c: In function â__expand_tableâ:
../../../../../../comb/newlib/libc/search/hash.c:898:1: error: unable to find a
register to spill in class âPOINTER_REGSâ
../../../../../../comb/newlib/libc/search/hash.c:898:1: error: this is the
insn:
(insn 190 97 191 10 (set (reg:QI 18 r18)
        (mem/c:QI (plus:HI (reg/f:HI 28 r28)
                (const_int 5 [0x5])) [14 S1 A8]))
../../../../../../comb/newlib/libc/search/hash.c:886 4 {*movqi}
     (nil))
../../../../../../comb/newlib/libc/search/hash.c:898:1: internal compiler
error: in spill_failure, at reload1.c:2113
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[8]: *** [lib_a-hash.o] Error 1
make[8]: Leaving directory
`/home/rth/work/gcc/bld-avr/avr-elf/avr25/newlib/libc/search'

I saw r28 in there and assumed it was the same problem with the
frame pointer as PR46779.

Anyway, I believe I've fixed the problem for #c0.  I'll commit it shortly.