<s>
Chaitin	B-Algorithm
's	I-Algorithm
algorithm	I-Algorithm
is	O
a	O
bottom-up	O
,	O
graph	O
coloring	O
register	O
allocation	O
algorithm	O
that	O
uses	O
cost/degree	O
as	O
its	O
spill	B-General_Concept
metric	I-General_Concept
.	O
</s>
<s>
Chaitin	B-Algorithm
's	I-Algorithm
algorithm	I-Algorithm
was	O
the	O
first	O
register	O
allocation	O
algorithm	O
that	O
made	O
use	O
of	O
coloring	O
of	O
the	O
interference	O
graph	O
for	O
both	O
register	O
allocations	O
and	O
spilling	O
.	O
</s>
<s>
Chaitin	B-Algorithm
's	I-Algorithm
algorithm	I-Algorithm
was	O
presented	O
on	O
the	O
1982	O
SIGPLAN	O
Symposium	O
on	O
Compiler	O
Construction	O
,	O
and	O
published	O
in	O
the	O
symposium	O
proceedings	O
.	O
</s>
<s>
Chaitin	B-Algorithm
's	I-Algorithm
algorithm	I-Algorithm
formed	O
the	O
basis	O
of	O
a	O
large	O
section	O
of	O
research	O
into	O
register	O
allocators	O
.	O
</s>
