<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
array-access	B-Application
analysis	I-Application
is	O
a	O
compiler	B-Application
analysis	I-Application
approach	O
used	O
to	O
decide	O
the	O
read	O
and	O
write	O
access	O
patterns	O
to	O
elements	O
or	O
portions	O
of	O
arrays	O
.	O
</s>
<s>
The	O
define/use	O
analysis	O
on	O
a	O
whole	O
array	O
is	O
insufficient	O
for	O
aggressive	O
compiler	B-Application
optimizations	I-Application
such	O
as	O
auto	O
parallelization	O
and	O
array	O
privatization	O
.	O
</s>
<s>
Array	B-Application
access	I-Application
analysis	I-Application
aims	O
to	O
obtain	O
the	O
knowledge	O
of	O
which	O
portions	O
or	O
even	O
which	O
elements	O
of	O
the	O
array	O
are	O
accessed	O
by	O
a	O
given	O
code	O
segment	O
(	O
basic	B-Application
block	I-Application
,	O
loop	O
,	O
or	O
even	O
at	O
the	O
procedure	O
level	O
)	O
.	O
</s>
<s>
Array-access	B-Application
analysis	I-Application
can	O
be	O
largely	O
categorized	O
into	O
exact	O
(	O
or	O
reference-list-based	O
)	O
and	O
summary	O
methods	O
for	O
different	O
tradeoffs	O
of	O
accuracy	O
and	O
complexity	O
.	O
</s>
<s>
Typical	O
exact	O
array-access	B-Application
analysis	I-Application
include	O
linearization	O
and	O
atom	O
images	O
.	O
</s>
