Explain loop-invariant code motion, Computer Engineering

Assignment Help:

Explain briefly Loop-invariant code motion of the commonly used code optimization techniques.

Loop-invariant code motion

If a quantity is calculated inside a loop during iteration and its value is similar for iteration, this can vastly improve efficiency to hoist this outside the loop and calculate its value just once before the loop begins. It is particularly significant with the address-calculation expressions generated through loops over arrays. For accurate implementation, such technique must be utilized with loop inversion, since not all code is safe to be hoisted outside the loop.

For illustration:

 for (i=1; i≤10, i++){

x=y*2-(1)

.

.

.

}

statement 1 can be hoisted outside the loop assuming value of x and y does not modify in the loop.


Related Discussions:- Explain loop-invariant code motion

Describe the analytical engine by babbage, THE ANALYTICAL ENGINE BY BABBAGE...

THE ANALYTICAL ENGINE BY BABBAGE: It was general use computing device that could be used for performing any types of mathematical operation automatically. It contains the follo

Convergence mean with respect to e-commerce, What does the term convergence...

What does the term convergence mean with respect to E-commerce? Convergence with respect to e-commerce   The ability to leverage and integrate the several data sources and

Explain about the client/server computing, Explain about the Client/Server ...

Explain about the Client/Server Computing? Although there are different various configurations, various hardware and software platforms and even various network protocols into

Static and dynamic interconnection network, Static and Dynamic Interconnect...

Static and Dynamic Interconnection Network In a static network the connection among input and output nodes is permanent and cannot be changed. Static interconnection network ca

Dbms, sketch a neat E-R diagram for hotel management system with real time ...

sketch a neat E-R diagram for hotel management system with real time example

How enterprises are using bpr in their e-business processes, One of the mos...

One of the most important competitive strategies for E-Businesses today is business process reengineering. BPR is more than automating business processes to make modest improvement

What are the advantages of having e-commerce over extranets, What are the a...

What are the advantages of having e-commerce over extranets?     Extranets are about " joining up" the supply chain-suppliers, resellers, distributors, customers, etc.-enabling

Difference between the specparam and parameter constructs, What is the diff...

What is the difference between the specparam and parameter constructs? Specparam is a special kind of parameter which is intended to specify only timing and the delay values. K

Learning abilities of perceptrons - ann, Learning Abilities of Perceptrons ...

Learning Abilities of Perceptrons - Artificial intelligence Computational learning theory is the study of what concepts specific learning schemes (representation and method) ca

What is access latency and rotation speed, Q. What is Access latency and Ro...

Q. What is Access latency and Rotation Speed? Access latency: A disk access basically moves the arm to selected cylinder and waits for rotational latency that may take less t

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd