What is machine dependent optimization?
Machine Dependent Optimization – Machine-dependent optimization is done after the target code has been generated and when the code is transformed according to the target machine architecture. It involves CPU registers and may have absolute memory references rather than relative references.
Which of the following is machine dependent Optimisation?
4 Answers. Machine Independent optimization: Loop optimization, Redundancy elimination, folding, Strength reduction, Deadlock elimination. Machine Dependent optimization: Register allocation, Use of addressing modes, Peephole optimization.
What is machine dependent and independent code optimization?
Machine-independent optimization phase tries to improve the intermediate code to obtain a better output. Machine-dependent optimization is done after generation of the target code which is transformed according to target machine architecture. This involves CPU registers and may have absolute memory references.
What are the code optimization techniques?
Code Optimization Techniques-
- Compile Time Evaluation.
- Common sub-expression elimination.
- Dead Code Elimination.
- Code Movement.
- Strength Reduction.
What are machine dependent codes?
The kernel is divided into two major parts: the machine-independent code and the machine-dependent code. The former is shared among the ports, is entirely in C, and contains the algorithms and data structures that do not depend on the architecture on which the kernel is running.
What is machine dependent code generation?
Machine-dependent optimization is done after the target code has been generated and when the code is transformed according to the target machine architecture. It involves CPU registers and may have absolute memory references rather than relative references.
What is machine dependent and machine independent?
Machine-dependent software is software that runs only on a specific computer. Applications that run on multiple computer architectures are called machine-independent, or cross-platform.
What is the difference between machine independent and machine dependent?
Summary – Machine Dependent vs Machine Independent Code Optimization. The difference between machine dependent and machine independent code optimization is that the machine dependent optimization is applied to object code whereas, the machine independent code optimization is applied to intermediate code.
What is machine independent code optimization?
Machine independent optimization attempts to improve the intermediate code to get a better target code. The part of the code which is transformed here does not involve any absolute memory location or any CPU registers.
How do you write optimized code?
Optimize Program Algorithm For any code, you should always allocate some time to think the right algorithm to use. So, the first task is to select and improve the algorithm which will be frequently used in the code. 2. Avoid Type Conversion Whenever possible, plan to use the same type of variables for processing.
What is machine dependent language?
Machine languages are so closely related to the structure of a particular computer that they are said to be machine dependent. Programs written in machine language are not portable, that is, they may not be run on other computers with different machine languages.
What are the 3 areas of code optimization?
A code optimizing process must follow the three rules given below: The output code must not, in any way, change the meaning of the program….Basic block identification
- First statement of a program.
- Statements that are target of any branch (conditional/unconditional).
- Statements that follow any branch statement.
Why do we need machine dependent code optimization?
Machine dependent optimization involves transformations that take into consideration, the properties of the target machine like registers and special machine instruction sequences available, etc. these techniques are applied on generated target code. Why is Machine Dependent Optimization Needed?
How is machine independent optimization used in compiler?
Machine Independent Optimization – This code optimization phase attempts to improve the intermediate code to get a better target code as the output. The part of the intermediate code which is transformed here does not involve any CPU registers or absolute memory locations.
What are the different types of code optimization?
Types of Code Optimization – The optimization process can be broadly classified into two types : 1 Machine Independent Optimization – This code optimization phase attempts to improve the intermediate code to get a… 2 Machine Dependent Optimization – Machine-dependent optimization is done after the target code has been generated and… More
What are some possibilities for M-D code optimization?
Optimization is the field where most compiler research is done today. Other possibilities for M-D code optimization involve taking advantage of specific characteristics and instructions. Several functional units in some CPU can affect the speed of execution.