Symbol Table (ST)
15/43
(10)
(20)
none
live
live
dead
a
b
pos
next use
status
variable
Extetion of a ST:
Status
:
…
…
…
live
dead
Next use
:
n
one
(
i
)
•
i
= number of a line
Initial assumption:
•
A
ll programmer variables:
•
A
ll temporary variables:
•
A
ll variables:
Status
:
live
Status
:
dead
Next use
:
none