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

Is the basic list deleted when the new list is created, Is the basic list d...

Is the basic list deleted when the new list is created? No.  It is not removed and you can return back to it using one of the standard navigation functions like clicking on th

Quick sort exhibit its worst-case behaviour, In which input data does the a...

In which input data does the algorithm quick sort exhibit its worst-case Behaviour? The Quick Sort method exhibits its worst-case behavior when the input data is " Already Comp

What do you mean by digital computer, COMPUTER ORGANIZATION & ARCHITECTURE ...

COMPUTER ORGANIZATION & ARCHITECTURE 1. What do you mean by digital computer? Explain the block diagram of a digital computer. 2. What do you mean by Difference Engine? Expl

Ms access database through menu driven selections, Would you like to easily...

Would you like to easily automate your MS Access database through menu driven selections? This can be accomplished by producing a form with customized buttons that point to macr

Row-major order and column-major order of arrays, Two-dimensional array is ...

Two-dimensional array is represented in memory in following two ways: 1.  Row major representation: To attain this linear representation, the first row of the array is kept in

Describe about sole access protocol, Q. Describe about Sole Access Protocol...

Q. Describe about Sole Access Protocol? The atomic operations that have conflicts are handled with the help of sole access protocol. The method used for synchronization in this

What is throughput of a system, Throughput of a system is? Ans. "Throug...

Throughput of a system is? Ans. "Throughput" of a system is no. of programs processed by this per unit time.

Illustrate the purchase consummation activity, Illustrate the Purchase Cons...

Illustrate the Purchase Consummation activity? Purchase Consummation: This model lists three activities in the purchase consummation phase: • Receipt of product. • Pl

Differentiate between programming tools and authoring tools, Diffrentiate p...

Diffrentiate programming tools and authoring tools Distinction between programming tools and authoring tools is not at first obvious. Though, authoring tools require less techn

Homework, ECE 3550 DIGITAL DESIGN FALL 2013 Homework Assignment #8 Total: 5...

ECE 3550 DIGITAL DESIGN FALL 2013 Homework Assignment #8 Total: 50 pts. Due 11:30am, Wednesday, November 13, 2013 The Potential Impact of the Google Glass on Personal Computing Sea

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