May 2024
Intermediate to advanced
536 pages
17h 10m
English
Content preview from Compilers: Principles and Practice by Pearson
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Intermediate Code 235
The RPN representation is not very convenient from performing optimization, though it is used
frequently to build virtual machines.
8.2.1 Generating RPN
We now see how Reverse Polish notation can be generated from a parse tree. Suppose we want the
RPN for an expression 3 * (4 + 5). Its parse tree is shown in Fig. 8.5 and syntax tree in Fig. 8.6.
The syntax tree is obtained by traversing the parse tree in pre-order and creating a sub-tree when
an operator is encountered, with the operator as the root and the operands under it from the parse
tree. The RPN can be generated by traversing the syntax tree in post-order and outputing ...
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