paradoxical subreg problem

[David Edelsohn]

>>>>> Richard Kenner writes:

Richard> Let me rephrase: why are we genering this if we don't know what those
Richard> bits are?

	I agree with Kenner.  There are two things we can discuss: should
this ever be generated and should this be generated in this particular
instance causing problems.  Regardless whether this compare result can be
determined at compile-time or run-time, if the bits are undefined, why is
GCC generating an expression that relies on undefined bits?

David