unreachable code meaning in Hindi

Examples

1. This is in contrast to unreachable code analysis which is based on control flow analysis.
2. Here, the unreachable code is the call to the final function, which should have been reached.
3. In practice the sophistication of the analysis performed has a significant impact on the amount of unreachable code that is detected.
4. Applying the Clang compiler with the option-Weverything includes unreachable code analysis, which would trigger an alarm for this code.
5. Unreachable code is sometimes also called " dead code ", although dead code may also refer to code that is executed but has no effect on the output of a program.
6. In this case, the behavior of unreachable code ( the return statement ) is undefined, so the compiler can eliminate it and use a tail call optimization that might result in no stack usage.
7. If a subgraph is not connected from the subgraph containing the entry block, that subgraph is unreachable during any execution, and so is unreachable code; under normal conditions it can be safely removed.
8. However, in practice it is also common for code sections to represent dead or unreachable code only " under certain conditions ", which may not be known at the time of compilation.
9. An example of such a conditionally unreachable code may be the implementation of a printf ( ) function in a compiler's runtime library, which contains complex code to process all possible string arguments, of which only a small subset is actually used in the program.
10. Unreachable code and infinite loops are possible even if the programmer does not explicitly code them : optimizations like constant propagation and constant folding followed by jump threading can collapse multiple basic blocks into one, cause edges to be removed from a CFG, etc ., thus possibly disconnecting parts of the graph.