Global register allocation

I am baffled. How can a compiler allocate global registers?
The only solution that comes to my mind is to make the linker
not only capable of resolving memory addresses, but also
inserting load/store instructions in case of global register
conflicts. But that would undo compiler optimisation.


Please shed some visible electromagnetic wave on this matter.


Nor Jaidi jaidi@technet.sg
[I'd guess that typically the compiler looks at the whole program before
handing it to the linker. Also remember that "global" often is taken to mean
among a group of related routines, not necessarily the whole program. -John]
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