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1 compiler optimization
один из этапов компиляции, на котором с помощью методов оптимизации происходит преобразование программы, сохраняющее её семантику, но уменьшающее размер кода и/или время выполнения. Как правило, уменьшение размера кода увеличивает время выполнения, и наоборот. Поскольку ручная оптимизация программы стоит дорого и занимает много времени, а программисты, работающие на ЯВУ, обычно не знают тонкостей архитектуры конкретного целевого процессора, то сейчас кроме редких случаев используется оптимизация при компиляции, когда компилятор автоматически выбирает наиболее эффективный способ оптимизации и детали реализации в соответствии с заданным уровнем оптимизациисм. тж. antidependence, branch deletion, automatic parallelization, constant folding, constant propagation, control dependence, copy propagation, CSE, data dependence, dead statement, expression folding, fission by name, global forward substitution, GVN, hand optimization, intermediate representation, interprocedural optimization, jump threading, lazy evaluation, induction variable, instruction scheduling, instruction selection, local optimization, loop collapsing, loop invariant code motion, loop inversion, loop parallelization, loop optimization, loop peeling, loop skewing, loop splitting, loop tiling, loop transformation, loop unrolling, loop unrolling and jamming, loop unswitching, loop unwinding, loop vectorization, LNO, optimization, optimization technique, optimizing compiler, output dependence, partial evaluation, peephole optimization, polytope model, PRE, redundant-test elimination, register allocation, register spilling, scalar replacement, SSA, static analysis, strength reduction, strip mining, test promotion, trace scheduling, true dependence, two-version loop, vectorizationАнгло-русский толковый словарь терминов и сокращений по ВТ, Интернету и программированию. > compiler optimization
См. также в других словарях:
Loop optimization — In compiler theory, loop optimization plays an important role in improving cache performance, making effective use of parallel processing capabilities, and reducing overheads associated with executing loops. Most execution time of a scientific… … Wikipedia
Loop interchange — In compiler theory, loop interchange is the process of exchanging the order of two iteration variables. For example, in the code fragment: for i from 0 to 10 for j from 0 to 20 a [i,j] = i + jloop interchange would result in: for j from 0 to 20… … Wikipedia
Loop dependence analysis — In compiler theory, loop dependence analysis is the task of determining whether statements within a loop body form a dependence, almost always with respect to array access and modification. For a normalized loop: for i1 from l1 to u1 do for i2… … Wikipedia
Normalized loop — In computer science, a normalized loop (sometimes called well behaved loop), is a loop which the loop variable starts at 0 (or any constant) and get incremented by one at every iteration until the exit condition is met. Normalized loops are very… … Wikipedia
Polytope model — The polyhedral model (also called the polytope method) is a mathematical framework for loop nest optimization in compiler theory. The polytope method models operations within nested manifest loops as mathematical objects called polytopes,… … Wikipedia
Frameworks supporting the polyhedral model — Use of the polyhedral model within a compiler requires software to represent the objects of this framework (sets of integer valued points in regions of various spaces) and perform operations upon them (e.g., testing whether the set is empty). Two … Wikipedia
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Flip-flop (electronics) — An SR latch, constructed from a pair of cross coupled NOR gates. Red and black mean logical 1 and 0 , respectively. In electronics, a flip flop or latch is a circuit that has two stable states and can be used to store state information. The… … Wikipedia
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