Optimization can be categorized broadly into ____ types.

 A fragment of code that resides in the loop and computes the same value at each iteration is called a?

 A variable is called an _________ variable if its value is altered within the loop by a loop-invariant value.

 Dead code plays no role in any program operation and therefore it can simply be eliminated.

Substitution of values for names whose values are constant, is done in

Peep-hole optimization is a form of 

In analyzing the compilation of PL/I program, the term Machine independent optimization is assosiated with
 

Before generating intermediate code, the compiler can modify the intermediate code by address calculations and improving loops.

The compiler can make use of memory hierarchy and CPU registers.

A compiler for a high-level language that runs on one machine and produces code for a different machine is called