Basic Block Table (BBT)
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status
a:=b+c
(i)
next use
instruction
line
Structure of a BBT:
Textové pole: …
…
Textové pole: …
…
Textové pole: …
…
Textové pole: …
…
backward
Suppose that (i) is the current instruction:
1) Move status and next use of a ,b ,c from ST to BBT
2) In ST make these changes:
• Method:
For variable  a:     Status: dead Next use: none
For variables b ,c:    Status: live Next use: (i)