<s>
BURS	B-General_Concept
(	O
bottom-up	O
rewrite	O
system	O
)	O
theory	O
tackles	O
the	O
problem	O
of	O
taking	O
a	O
complex	O
expression	O
tree	O
or	O
intermediate	O
language	O
term	O
and	O
finding	O
a	O
good	O
translation	O
to	O
machine	B-Language
code	I-Language
for	O
a	O
particular	O
architecture	O
.	O
</s>
<s>
Implementations	O
of	O
BURS	B-General_Concept
often	O
employ	O
dynamic	B-Algorithm
programming	I-Algorithm
to	O
solve	O
this	O
problem	O
.	O
</s>
<s>
BURS	B-General_Concept
can	O
also	O
be	O
applied	O
to	O
the	O
problem	O
of	O
designing	O
an	O
instruction	B-General_Concept
set	I-General_Concept
for	O
an	O
application-specific	B-General_Concept
instruction	I-General_Concept
set	I-General_Concept
processor	I-General_Concept
.	O
</s>
