RTL checking fails (solaris2, irix6 & x86) SUBREG_BYTE related?

[Andrew Macleod]

>> I'm getting across the board RTL checking failures last night
>> bootstrapping the trunk on the following platforms.  They all die in
>> the same check (at different parts of the bootstrap) so they're likely
>> all related.  I'm going to somewhat randomly blame the SUBREG patches,
>> since they last tweeked the function where the check crash happened.
>> 
>> I suspect it's easy to reproduce, but let me know if you need a .i
>> file.

Hmm. I just did a new extract, and it boostrapped fine on x86, and the
solaris one is still progressing.. Do I have to add something else
at configuration time to turn on the checking which shows this? Ive
bootstrapped every day since I checked it in with default configuration
on builds with i686-pc-linux-gnu.

Andrew