Compiling without the use of static registers in IA-64

[Jim Wilson]

mcrosier@ncsu.edu wrote:
> I was wondering if anyone knew how I could modify gcc to not use static
> general purpose registers on an IA-64 machine?

Besides the -ffixed-reg option Vlad mentioned, there is also a 
documented IA-64 specific option for this.  See the docs.  No reason why 
this option needs to be IA-64 specific though; it was just implemented 
that way for convenience before the IA-64 port was contributed to the FSF.

You may have trouble with 64-bit constants if you disable r2/r3.  There 
are only four regs that work with the addl instruction, and you have 
just disallowed all of them.  You might need other changes to make this 
work.
-- 
Jim Wilson, GNU Tools Support, http://www.specifix.com