Stricter invalid_e500_subreg (with jump.c:true_regnum fix)

[Rask Ingemann Lambertsen]

On Wed, Nov 29, 2006 at 12:25:21AM +0000, Joseph S. Myers wrote:

> (I wonder if subreg_regno_offset should have an assert that
> subreg_offset_representable_p passes?

   I think it should.

> I suspect this would show up
> other bugs, perhaps too many such bugs for it to be possible just to
> put such an assert in and let such bugs get fixed as they are found.)

   For starters, i686-pc-linux-gnu will fail bootstrap building libgcc
during stage1:

../../../src/gcc/gcc/libgcc2.c: In function '__muldc3':
../../../src/gcc/gcc/libgcc2.c:1878: internal compiler error: in subreg_regno_offset, at rtlanal.c:2934

-- 
Rask Ingemann Lambertsen