Spilling problems

[Dan Sugalski]

Well, I thought this was only an issue with massively large programs 
(of which I have *far* too many), but I'm making IMCC fall over and 
die with subs of less than 6k-lines of PIR. (5945 lines, counting the 
sub start and end lines, with old style (.pcc_begin/.pcc_end) 
function calls) In this case I'm hitting the double spill error, but 
this is, I expect, tied in with the infinite loop the register 
spiller hits on some code.

That's a small enough sub that I can see us reasonably hitting this 
with regular compilers compiling non-braindead languages, so we need 
to move up the priority on fixing this.

It's probably a Leo or Melvin thing (unless anyone's see Angel Faus 
recently) to thump the register spilling code to have a fairly stupid 
fallback scheme (after X tries, or when we hit double spill) rather 
than trying to be optimal, but this one's going to need to get 
addressed.
--
				Dan

--------------------------------------it's like this-------------------
Dan Sugalski                          even samurai
[EMAIL PROTECTED]                         have teddy bears and even
                                      teddy bears get drunk