[Bug c/36571] New: Default untyped return for AVR is byte register.

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

Test testsuite/gcc.dg/builtin-return-1.c will fail for avr target.

Default implementation of builtin-return-1 is untyped return of a single
register.
Which is R25 and only 1 byte. This is not int as test expects.
So high byte may and does get overwritten before outer return.

The test may be invalid, but this is also reminder that AVR target does not
have a complete definition for untyped return. The default is pretty useless.

Test with be marked XFAIL.


-- 
           Summary: Default untyped return for AVR is byte register.
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hutchinsonandy at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: avr-unknown-nne


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36571