Compilers: Principles and Practice by Pearson

300 Compilers – Principles and Practice

There are a few more compilation schemes which are of interest. The increment operator, ++, in

Java, C and C++ can be implemented using:

var++ = movl var,%eax ++var = incl var

incl var movl var,%eax

If var++ or ++var appears in an expression, then the final value in eax is important. If either appears

as a statement, then the final value is not important, and we can compile either as just incl var. We

can distinguish the different contexts by matching for ++ expressions both in the S and the E schemes.

Java, C and C++ provide two ways of escaping from a loop:

while(...){ while(...){

... ...

} cont:

}

past: ...