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Type of compiler optimization
body of a loop without affecting the semantics of the program. Loop-invariant code motion (also called hoisting or scalar promotion) is a compiler optimization
Loop-invariant_code_motion
Generic term for compiler optimization
In computer science, code motion, which includes code hoisting, code sinking, loop-invariant code motion, and code factoring, is a blanket term for any
Code_motion
Invariants used to prove properties of loops
assertion, sometimes checked with a code assertion. Knowing its invariant(s) is essential in understanding the effect of a loop. In formal program verification
Loop_invariant
Increasing execution speed and reducing the overheads associated with loops
if-guard can be skipped. Loop-invariant code motion – this can vastly improve efficiency by moving a computation from inside the loop to outside of it, computing
Loop_optimization
Compiler that optimizes generated code
a loop index with addition. Loop optimization acts on the statements that make up a loop, such as a for loop, for example loop-invariant code motion. Loop
Optimizing_compiler
copy propagation dead code elimination alias analysis loop unrolling induction variable elimination loop-invariant code motion loop reversal Sunitha, K
Vbcc
collection of intraprocedural optimizations such as dead code elimination, loop-invariant code motion, and induction variable elimination can take advantage
Enabling_transformation
Improving the efficiency of software
place where understanding of compilers and machine code can improve performance. Loop-invariant code motion and return value optimization are examples of optimizations
Program_optimization
Concept in computer science
in successors(n) Changed = Changed U { s }; } } Dead-code elimination Loop-invariant code motion Reachable uses Static single assignment form Aho, Alfred
Reaching_definition
it performs (a form of) common subexpression elimination and loop-invariant code motion at the same time. In addition, PRE can be extended to eliminate
Partial-redundancy elimination
Partial-redundancy_elimination
Optimization replacing a function call with that function's source code
parameter, or part of the function may be "hoisted out" of a loop (via loop-invariant code motion). Register allocation can be done across the larger function
Inline_expansion
Mutual exclusion algorithm
accessed in the loop. It can then remove the writes to those variables from the loop, using a process called loop-invariant code motion. It would also
Dekker's_algorithm
Compiler optimization
an arithmetic result when it is needed. Global value numbering Loop-invariant code motion Steven Muchnick; Muchnick and Associates (15 August 1997). Advanced
Common subexpression elimination
Common_subexpression_elimination
Topics referred to by the same term
Outliner, filter for viewing In computing, hoisting may refer to: Loop-invariant code motion, a compiler optimization Variable hoisting, scope rule in JavaScript
Hoist
Property that is not changed by mathematical transformations
In mathematics, an invariant is a property of a mathematical object (or a class of mathematical objects) which remains unchanged after operations or transformations
Invariant_(mathematics)
Graphical representation of a computer program or algorithm
empty, but passes like loop-invariant code motion could populate it. Mpre is called the loop pre-header, and Mloop would be the loop header. A control flow
Control-flow_graph
C++ framework for compiler development
existing optimizations (e.g., common subexpression elimination, loop-invariant code motion) on custom dialects by means of traits and interfaces. These two
MLIR_(software)
Compiler optimization
the code causes a pipeline stall, which is a detriment to performance. [citation needed] Additionally, loop inversion allows safe loop-invariant code motion
Loop_inversion
Topics referred to by the same term
LICM may refer to: Long Island Children's Museum Loop-invariant code motion This disambiguation page lists articles associated with the title LICM. If
LICM
Keyword used in some programming languages to tag variables
the code from the first sample with the read in the loop to the second sample without the read in the loop as part of the common loop-invariant code-motion
Volatile (computer programming)
Volatile_(computer_programming)
JavaScript and WebAssembly engine
linear-scan register allocation, dead code elimination, and loop-invariant code motion. The compiler can emit fast native code translations of JavaScript functions
SpiderMonkey
Tools for optimizing binary code
copy propagation, constant propagation, strength reduction, loop invariant code motion and loop unrolling. Target binaries had to be relinked to its custom
Binary_optimizer
block (s*). This acts as an implicit invariant assertion, similar in function to Janus's explicit exit assertion. Loop: (for name = e_start to e_end s*)
Reversible programming language
Reversible_programming_language
Approach for designing software
definition of abstract data types with preconditions, postconditions and invariants. These specifications are referred to as "contracts", in accordance with
Design_by_contract
Method of improving computer program speed
ISBN 978-3-031-24949-5. Moyen, Jean-Yves; Rubiano, Thomas; Seiller, Thomas (2017). "Loop Quasi-Invariant Chunk Detection". Automated Technology for Verification and Analysis
Automatic_parallelization
Technique used to optimize the execution of a program at runtime
include common-subexpression elimination, dead code elimination, register allocation, invariant-code motion, constant folding, and escape analysis. After
Tracing just-in-time compilation
Tracing_just-in-time_compilation
Test to determine whether a user is human
simultaneous use of three separate abilities—invariant recognition, segmentation, and parsing to complete the task. Invariant recognition refers to the ability to
CAPTCHA
Random change in the energy inside a volume
but it is causal),[citation needed] the quantum vacuum state is Lorentz-invariant (although not manifestly in the above), whereas the classical thermal
Quantum_fluctuation
Process forming a path from many random steps
Wiener process walk is invariant to rotations, but the random walk is not, since the underlying grid is not (random walk is invariant to rotations by 90 degrees
Random_walk
Physical theory with fields invariant under the action of local "gauge" Lie groups
differential geometry. A quantity which is gauge-invariant (i.e., invariant under gauge transformations) is the Wilson loop, which is defined over any closed path
Gauge_theory
Overview of and topical guide to algorithms
(computer science) — property that an algorithm satisfies its specification Loop invariant — condition used to prove correctness of iterative algorithms Recurrence
Outline_of_algorithms
Computational navigational technique used by robots and autonomous vehicles
this can be done by storing and comparing bag of words vectors of scale-invariant feature transform (SIFT) features from each previously visited location
Simultaneous localization and mapping
Simultaneous_localization_and_mapping
Abstract representation of movement
thought to contain an abstract representation for a class of movements with invariant features pertaining to the order of events, the relative timing of events
Motor_program
Mathematical visualization
is investigated. This is done by simulating a simple LTI (Linear Time-Invariant) model, or by simulating a non-linear model of the plant with the controller
Model-based_design
Process of mathematical modelling, performed on a computer
data is available varies: "invariant" data is often built into the model code, either because the value is truly invariant (e.g., the value of π) or because
Computer_simulation
Theory of gravitation as curved spacetime
gravity can be neglected, physics is Lorentz invariant as in special relativity rather than Galilei invariant as in classical mechanics. (The defining symmetry
General_relativity
Interpretation of sensory information
perception struggles to account for. This is largely because closed-loop perception considers motion to be an integral part of perception, and not an interfering
Perception
Variation of Atwood's machine incorporating a pendulum
initial velocity. The motion is singular if at some point, the swinging mass passes through the origin. Since the system is invariant under time reversal
Swinging_Atwood's_machine
Algorithm that estimates unknowns from a series of measurements over time
independent of k {\displaystyle k} , the Kalman filter becomes a linear time-invariant filter: x ^ k = F x ^ k − 1 + K ∞ [ z k − H F x ^ k − 1 ] . {\displaystyle
Kalman_filter
Decryption of the cipher of the Enigma machine
cycle groups with lengths of 9, 9, 3, 3, 1, and 1. He described this invariant structure as the characteristic of the indicator setting.[dubious – discuss]
Cryptanalysis_of_the_Enigma
Sub-discipline of electrical engineering
discrete-time Fourier Transform, z-transform. Sampling theorems. Linear Time-Invariant (LTI) Systems: definitions and properties; causality, stability, impulse
Electronics_engineering
Algorithm for finding shortest paths
algorithm, mathematical induction can be used on the number of visited nodes. Invariant hypothesis: For each visited node v, dist[v] is the shortest distance
Dijkstra's_algorithm
control theory and signal processing, treats neurons and synapses as time-invariant entities that produce outputs that are linear combinations of input signals
Models_of_neural_computation
Hypothesis in neuroscience
\Theta \times \Pi } that can comprise time-dependent variables, time-invariant parameters and the precision (inverse variance or temperature) of random
Free_energy_principle
Topics referred to by the same term
totally ordered group), a group with a total order that is translation-invariant Linear order (AKA total order), a binary relation that is not just a partial
Linear_(disambiguation)
Problem in physics and celestial mechanics
configurations have played an important role in understanding the topology of invariant manifolds created by fixing the first integrals of a system. Solutions
N-body_problem
Problem in computer science
cycles are of length 1 or 2, and the transpose can be achieved by a simple loop to swap the upper triangle of the matrix with the lower triangle. Further
In-place_matrix_transposition
Classification of Artificial Neural Networks (ANNs)
learning). A convolutional neural network (CNN, or ConvNet or shift invariant or space invariant) is a class of deep network, composed of one or more convolutional
Types of artificial neural networks
Types_of_artificial_neural_networks
Statistical method
stereo cameras; see also: Structure from motion, scale-invariant feature transform, image stitching, rigid motion segmentation. Since 1981 RANSAC has become
Random_sample_consensus
Type of neuron involved in spatial processing
is mostly orientation-invariant and location-specific, whereas HD cells are mostly orientation-specific and location-invariant. However, HD cells do not
Head_direction_cell
Study of vector bundles, principal bundles, and fibre bundles
equations of motion for a classical field theory, particles known as instantons. Gauge theory has found uses in constructing new invariants of smooth manifolds
Gauge_theory_(mathematics)
Marr–Hildreth algorithm: an early edge detection algorithm SIFT (Scale-invariant feature transform): is an algorithm to detect and describe local features
List_of_algorithms
discrimination is independent (invariant ) of the direction the object moves in the toad's visual field. Taking into account motion direction invariance, a more
Vision_in_toads
Mathematical model of ferromagnetism in statistical mechanics
+1 spins? The most studied case of the Ising model is the translation-invariant ferromagnetic zero-field model on a d-dimensional lattice, namely, Λ = Zd
Ising_model
Supposition or system of ideas intended to explain something
Homology theory — Homotopy theory — Ideal theory — Intersection theory — Invariant theory — Iwasawa theory — K-theory — KK-theory — Knot theory — L-theory
Theory
Random process independent of past history
details of the system, if it can be assumed that the dynamics are time-invariant, and that no relevant history need be considered which is not already
Markov_chain
polyhedra with the same volume and Dehn invariant be scissors-congruent? Babai's problem: which groups are Babai invariant groups? Brouwer's conjecture on upper
List of unsolved problems in mathematics
List_of_unsolved_problems_in_mathematics
Analog of the continuous Laplace operator
Laplace operator occurs in physics problems such as the Ising model and loop quantum gravity, as well as in the study of discrete dynamical systems. It
Discrete_Laplace_operator
Modulation transformer Modulation Monoscope Moon landing Moore's law Morse code MOSFET Motion control Motor controller Motor soft starter Mp3 MRI Multics Multimeter
Index of electrical engineering articles
Index_of_electrical_engineering_articles
Origins of Einstein's gravitation theory
gravity was proposed by Henri Poincaré in 1905. He published a Lorentz invariant theory on four-dimensional spacetime, where gravity is transmitted by
History_of_general_relativity
Collapsed core of a massive star
time-invariant metric. With a given equation of state, solving the equation leads to observables such as the mass and radius. There are many codes that
Neutron_star
Machine learning paradigm
Barlow Twins and VICReg, which enforce covariance constraints to learn invariant representations without negative sampling. Deep Latent Variable Path Modelling
Self-supervised_learning
Nervous system stimuli filtration process
co-ordinates, demonstrating that the worm versus anti-worm discrimination is invariant under changes in the direction of movement. It is imperative to underscore
Feature detection (nervous system)
Feature_detection_(nervous_system)
Study of animal behavior and its underlying mechanistic control by the nervous system
configuration is independent (invariant) of changes in other stimulus parameters such as color, contrast of the stimulus background, the motion vector in relation
Neuroethology
Set with associative invertible operation
that remain stable under group actions are investigated in (geometric) invariant theory. Matrix groups consist of matrices together with matrix multiplication
Group_(mathematics)
Collection of random variables
is said to be stationary if its finite-dimensional distributions are invariant under translations of time. This type of stochastic process can be used
Stochastic_process
energy" is used to describe the potential energy in systems with time-invariant electric fields. Electric power is the rate, per unit time, at which electrical
Glossary_of_engineering:_A–L
Amberg, Brian; Knothe, Reinhard; Vetter, Thomas (2008). "Expression invariant 3D face recognition with a Morphable Model" (PDF). 2008 8th IEEE International
List of datasets in computer vision and image processing
List_of_datasets_in_computer_vision_and_image_processing
Physical law for entropy and heat
recurrence time, the thermodynamic behavior of the system would become invariant under time reversal. James Clerk Maxwell imagined one container divided
Second_law_of_thermodynamics
List of definitions of terms and concepts used in electrical engineering and electronics
computer processes each user's software in round-robin fashion. time-invariant system A systems whose characteristics don't vary significantly with time
Glossary of electrical and electronics engineering
Glossary_of_electrical_and_electronics_engineering
Theory of subatomic structure
Nadis, p. 171 Givental, Alexander (1996). "Equivariant Gromov-Witten invariants". International Mathematics Research Notices. 1996 (13): 613–663. doi:10
String_theory
Basic structural unit of DNA packaging in eukaryotes
histone function is restricted to H2A and H3, with H2B and H4 being mostly invariant. H2A can be replaced by H2AZ (which leads to reduced nucleosome stability)
Nucleosome
can be found in the external links section. Given the ubiquity of scale-invariant burstiness observed across diverse networking contexts, finding an effective
Long-tail_traffic
a simplification that can be applied to networks made of linear time-invariant resistances, voltage sources, and current sources. At a pair of terminals
Glossary_of_engineering:_M–Z
Region within a prokaryotic cell containing genetic material
folded into plectonemic loops, which are confined to different physical regions and rarely diffuse into each other. These loops spatially organize into
Nucleoid
Indian inventions
Seshadri constant – In algebraic geometry, a Seshadri constant is an invariant of an ample line bundle L at a point P on an algebraic variety.The name
List of Indian inventions and discoveries
List_of_Indian_inventions_and_discoveries
equations, and geometric analysis Mara Neusel (1964–2014), German-American invariant theorist and advocate for women in mathematics Monica Nevins (born 1973)
List_of_women_in_mathematics
classification, Segre cubic, Segre embedding, Segre surface, Zeuthen–Segre invariant (first discovered by Zeuthen). Other notable exponents of this school
List of Italian inventions and discoveries
List_of_Italian_inventions_and_discoveries
Hypothesis proposing a modification of Newton's laws
Since this Lagrangian does not explicitly depend on time and is invariant under spatial translations this means energy and momentum are conserved
Modified_Newtonian_dynamics
critical ratio of dissolved nitrogen pressure to ambient pressure which was invariant with depth. A large number of decompression experiments were done using
History of decompression research and development
History_of_decompression_research_and_development
2024-09-05. Aaltonen, T.; Álvarez González, B.; Amerio, S. (2011-04-28). "Invariant Mass Distribution of Jet Pairs Produced in Association with a W Boson
2011_in_science
LOOP INVARIANT-CODE-MOTION
LOOP INVARIANT-CODE-MOTION
Girl/Female
Hindu
Code
Surname or Lastname
English
English : metonymic occupational name for a maker of purses and bags, from Middle English cod ‘bag’.English : nickname for a man noted for his apparent sexual prowess, from cod(piece), in Tudor times the garment worn prominently over the male genitals.English : from Middle English cod, the fish (of uncertain origin, perhaps a transferred use of 1), applied as a metonymic occupational name for a fisherman or seller of these fish, or possibly as a nickname for someone thought to resemble the fish in some way.Irish : variant of Cody.Irish (County Wexford) : from the Anglo-Saxon personal name Cod.
Female
Yiddish
(×”Ö¸×דֶע) Yiddish form for Hebrew Hadaccah, HODE means "myrtle tree."
Surname or Lastname
German
German : from a short form of any of the various Germanic personal names with the first element hrÅd ‘renown’. Compare Robert, Rudiger.North German, Danish, and English : topographic name for someone who lived on land cleared for cultivation or in a clearing in woodland, from Middle Low German rode, Danish rothe, Old English rod. Compare English Rhodes.English : habitational name from any of the many places named with this word, as for example Rode in Cheshire.Slovenian : topographic name from the adjective rod ‘barren’, denoting someone who lived on a barren land.Slovenian : nickname from the Slovenian dialect word rode ‘person with disheveled hair’, a derivative of rod ‘curly’ or ‘hairy’.
Male
French
French form of Latin Lupus, LOUP means "wolf."
Male
English
Variant spelling of English unisex Cody, CODIE means "helper."
Boy/Male
Hindu, Indian, Rajasthani, Sindhi, Traditional
Look; Beauty; Appearance
Girl/Female
Hindu
Look, Blessed with beauty, Shape, Beauty
Surname or Lastname
English (Somerset)
English (Somerset) : habitational name from Look in Puncknowle, Dorset, named in Old English with lūce ‘enclosure’.English : possibly a variant of Luck 3.Northern English and Scottish : from a vernacular pet form of Lucas.Dutch (van Look) : topographic name from look ‘enclosure’ or habitational name from a place named with this word.Thomas Look (b. c. 1622) was in Lynn, MA, by 1646. His son, also called Thomas (b. 1646), moved to Martha’s Vineyard about 1670.
Surname or Lastname
North German
North German : habitational name from any of several places called Loose or Loosey.North German : from a short form of Nikolaus, German form of Nicholas.Dutch : nickname from the adjective loos ‘cunning’, ‘artful’, ‘guileful’.English : variant spelling of Loose.
Girl/Female
Tamil
Code
Surname or Lastname
English
English : from a Middle English personal name, Cade, a survival of the Old English personal name or byname Cada, which is probably from a Germanic root meaning ‘lump’, ‘swelling’.English : metonymic occupational name for a cooper, from Middle English, Old French cade ‘cask’, ‘barrel’ (of Germanic origin, probably akin to the root mentioned in 1).English : nickname for a gentle or inoffensive person, from Middle English cade ‘domestic animal’, ‘pet’ (of unknown origin).French (Cadé) : topographic name from cade ‘juniper’ (from Latin catanus).Bearers of the name Caddé, from Amiens, were documented in Quebec city by 1670.
Male
English
 English surname transferred to forename use, derived from Old English Cola, COLE means "black, coal." This name is also sometimes used as a pet form of Nicholas, meaning "victor of the people."
Surname or Lastname
English (common in the Midlands)
English (common in the Midlands) : from Middle English cope ‘cloak’, ‘cape’ (from Old English cÄp reinforced by the Old Norse cognate kápa), hence a metonymic occupational name for someone who made cloaks or capes, or a nickname for someone who wore a distinctive one. Compare Cape.
Surname or Lastname
English
English : from a Middle English pet form of Nicholas.English : from a Middle English personal name derived from the Old English byname Cola (from col ‘(char)coal’, presumably denoting someone of swarthy appearance), or the Old Norse cognate Koli.Scottish and Irish : when not of English origin, this is a reduced and altered form of McCool.In some cases, particularly in New England, Cole is a translation of the French surname Charbonneau.Probably an Americanized spelling of German Kohl.An Irish family by the name of Cole was established in Fermanagh by Sir William Cole (1576–1653). He was the first Provost of Enniskillen, and his descendants became earls of Enniskillen. The family is thought to have originated in Devon or Cornwall.
Surname or Lastname
Spanish and Portuguese
Spanish and Portuguese : nickname from the title of rank conde ‘count’, a derivative of Latin comes, comitis ‘companion’.English : unexplained.
Surname or Lastname
English
English : variant of Cook.Americanized spelling of German Koke or Koch.
Surname or Lastname
English
English : habitational name from a place named Cove, examples of which are found in Devon, Hampshire, and Suffolk, from Old English cofa ‘cove’, ‘bay’, ‘inlet’, also ‘shelter’, ‘hut’, or a topographic name with the same meaning.
Surname or Lastname
English
English : variant spelling of Coad.
Surname or Lastname
English
English : variant spelling of Cox.
LOOP INVARIANT-CODE-MOTION
LOOP INVARIANT-CODE-MOTION
Boy/Male
Indian, Sanskrit
Has a Great Soul; Wise
Boy/Male
Indian
Desire, Wish
Boy/Male
African, American, Australian, Bengali, British, Chinese, Christian, Danish, Dutch, English, Finnish, French, German, Hawaiian, Hebrew, Indian, Irish, Jamaican, Japanese, Portuguese, Swedish, Swiss
Born of the Right Hand; Son of the One who Loves Horses
Girl/Female
Indian
A narrator of Hadith
Female
Chinese
refined and modest.
Boy/Male
Arabic
One who serves a merciful man.
Boy/Male
American, British, English
From the Shore Farm
Boy/Male
Indian
Bravery, Valor
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Lord Shiva
Boy/Male
Muslim
The peace, The source of peace and safety
LOOP INVARIANT-CODE-MOTION
LOOP INVARIANT-CODE-MOTION
LOOP INVARIANT-CODE-MOTION
LOOP INVARIANT-CODE-MOTION
LOOP INVARIANT-CODE-MOTION
v. t.
To render cone-shaped; to bevel like the circular segment of a cone; as, to cone the tires of car wheels.
n.
Any system of rules or regulations relating to one subject; as, the medical code, a system of rules for the regulation of the professional conduct of physicians; the naval code, a system of rules for making communications at sea means of signals.
a.
Relating to a codex, or a code.
v. t.
To make a loop of or in; to fasten with a loop or loops; -- often with up; as, to loop a string; to loop up a curtain.
p. p.
of Come
v. t.
To convert into coke.
n.
See Loon, the bird.
n.
Hence; Appearance; aspect; as, the house has a gloomy look; the affair has a bad look.
v. t.
To look at; to turn the eyes toward.
n.
A collection or digest of laws; a code.
n.
A function involving the coefficients and the variables of a quantic, and such that when the quantic is lineally transformed the same function of the new variables and coefficients shall be equal to the old function multiplied by a factor. An invariant is a like function involving only the coefficients of the quantic.
n.
Manner of doing or being; method; form; fashion; custom; way; style; as, the mode of speaking; the mode of dressing.
n.
Something which differs in form from another thing, though really the same; as, a variant from a type in natural history; a variant of a story or a word.
n.
Prevailing popular custom; fashion, especially in the phrase the mode.
n.
See 1st Loop.
v. t.
To express or manifest by a look.
n.
A ring; a circular band; anything resembling a hoop, as the cylinder (cheese hoop) in which the curd is pressed in making cheese.
v. t.
To break over the poop or stern, as a wave.
n.
A curve of any kind in the form of a loop.
v. t.
To take out the core or inward parts of; as, to core an apple.