cse patch to not extend hard reg lifetimes in bad situations

Bernd Schmidt bernds@redhat.com
Tue Jul 3 03:29:00 GMT 2001


On Mon, 2 Jul 2001, Geoffrey Keating wrote:

> The port is not SMALL_REGISTER_CLASSES because it actually has lots of
> general registers, only a few instructions have really small register
> choices.

This is precisely the situation where you want SMALL_REGISTER_CLASSES to
be defined.  It doesn't matter how many registers there are, if one class
is small enough to cause problems like this you need to define this macro.


Bernd



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