Ullman (Compiler Design) Edition 2 Exercise 2.8 Question 2 (Page No. 105)

Question

The programming language C does not have a boolean type. Show how a C compiler might translate an if-statement into three-address code.

Answer 1

eg- 

If (A < B)

        A=B;

 else

        B=A;

Three-address code-

........

1000:

1001: If (A < B) goto 1004

1002: B=A

1003: goto 1005

1004: A=B

1005:

1006:

.......