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

Show the code conversion with example, Q. Show the Code Conversion with exa...

Q. Show the Code Conversion with example? The conversion of data from one form to another is required. Consequently we will discuss an illustration for converting a hexadecimal

What is the efi shell?, The EFI community has formed an open source shell e...

The EFI community has formed an open source shell environment. Rather than booting directly into a full OS, on some executions, the user can boot to the EFI shell. The shell is an

Design of a software system, The aim of this Assignment is to demonstrate k...

The aim of this Assignment is to demonstrate knowledge about the analysis and design of a software system and understanding of the application of an object-oriented metho

Requirements of decision support system, Q. Requirements of decision suppor...

Q. Requirements of decision support system? a) Fast computation A decision maker is able to perform a large number of computations very quickly and that too at a low cost

Explain load sharing processor configuration of spc, Explain how a centrali...

Explain how a centralized SPC organization works under load sharing operation. Under load sharing operation, an incoming call is allocated randomly or in a predetermined sequen

Define functionality of application layer in tcp/ip protocol, Define the fu...

Define the functionality of application layer in TCP/IP protocol stack? Function of Application Layer: The top layer within the Internet reference model is the applicatio

Explain status and control registers, Q. Explain Status and Control Registe...

Q. Explain Status and Control Registers? For control of numerous operations several registers are used. These registers can't be used in data manipulation though content of som

Network for digital methods in the arts and humanities, Network for Digital...

Network for Digital Methods in the Arts and Humanities: Europe has seen a signifi cant investment in the digitisation of its cultural heritage as part of the worldwide establi

Basic concept of data parallelism, Basic Concept of Data Parallelism T...

Basic Concept of Data Parallelism Thinking the condition where the same problem of submission of „electricity bill? is Handled as follows: Again, three are counters. Howeve

What is the network service access policy, What is the Network Service Acce...

What is the Network Service Access Policy A high-level, issue-specific policy which defines those services that are allowed or denied from the restricted network. It also co

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