Which one of the following is FALSE?
A)A basic block is a sequence of instructions where control enters the sequence at the beginning and exits at the end.
B)Available expression analysis can be used for common subexpression elimination.
C)Live variable analysis can be used for dead code elimination.
D)x = 4 ? 5 = x = 20 is an example of common subexpression elimination.

Question

Which one of the following is FALSE?
A)A basic block is a sequence of instructions where control enters the sequence at the beginning and exits at the end.
B)Available expression analysis can be used for common subexpression elimination.
C)Live variable analysis can be used for dead code elimination.
D)x = 4 ? 5 => x = 20 is an example of common subexpression elimination.

Quizplus · Accepted Answer

The statement "x = 4 ? 5 => x = 20" does not correctly represent common subexpression elimination. Common subexpression elimination is an optimization technique used in compilers to identify and eliminate expressions that are computed multiple times within a program, replacing them with a single computation and reuse. The given statement seems to be a malformed attempt to express some kind of operation or assignment, but it does not illustrate the concept of common subexpression elimination.

Which One of the Following Is FALSE