Tremendous increase in compile times for 3.4.1 with -mcpu=G5

[David Edelsohn]

>>>>> Bradley Lucier writes:

Brad> I've been trying to digest this.  Is this a problem that gcc has with 
Brad> 64-bit ppc architecture, i.e., one that will also show up on aix and 
Brad> linux64?

	-mcpu=G5 is not a pure 64-bit PowerPC mode, it is a mixed mode:
64-bit computation within a function, but 32-bit ABI.  The conversion back
and forth at function boundaries causes the register allocator fits.

David