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<p>In <a href="Computer_science" title="Computer science">computer science</a>, <b>array-access analysis</b> is a <a href="Compiler_analysis" class="mw-redirect" title="Compiler analysis">compiler analysis</a> approach used to decide the read and write access patterns to elements or portions of arrays.<sup id="cite_ref-Paek2002_1-0" class="reference"><a href="#cite_note-Paek2002-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>
</p><p>The major data type manipulated in scientific programs is the array. The define/use analysis on a whole array is insufficient for aggressive <a href="Compiler_optimization" class="mw-redirect" title="Compiler optimization">compiler optimizations</a> such as <a href="Automatic_parallelization" title="Automatic parallelization">auto parallelization</a> and array <a href="Privatization_(computer_programming)" title="Privatization (computer programming)">privatization</a>. Array access analysis aims to obtain the knowledge of which portions or even which elements of the array are accessed by a given code segment (<a href="Basic_block" title="Basic block">basic block</a>, <a href="Control_flow#Loops" title="Control flow">loop</a>, or even at the <a href="Subroutine" class="mw-redirect" title="Subroutine">procedure</a> level).
</p><p>Array-access analysis can be largely categorized into exact (or reference-list-based) and summary methods for different tradeoffs of accuracy and complexity. Exact methods are precise but very costly in terms of computation and space storage, while summary methods are approximate but can be computed quickly and economically.
</p><p>Typical exact array-access analysis include linearization and atom images. Summary methods can be further divided into array sections, bounded regular sections using triplet notation, linear-constraint methods such as data-access descriptors and array-region analysis.
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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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<li id="cite_note-Paek2002-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-Paek2002_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">
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</style><cite id="CITEREFPaekHoeflingerPadua2002" class="citation journal cs1">Paek, Yunheung; Hoeflinger, Jay; Padua, David (January 2002). <a rel="nofollow" class="external text" href="https://doi.org/10.1145%2F509705.509708">"Efficient and precise array access analysis"</a>. <i>ACM Transactions on Programming Languages and Systems</i>. <b>24</b> (1): <span class="nowrap">65–</span>109. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1145%2F509705.509708">10.1145/509705.509708</a></span>.</cite></span>
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</style><div id="Compiler_optimizations253" style="font-size:114%;margin:0 4em"><a href="Optimizing_compiler" title="Optimizing compiler">Compiler optimizations</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Basic block</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Peephole_optimization" title="Peephole optimization">Peephole optimization</a></li>
<li><a href="Local_value_numbering" class="mw-redirect" title="Local value numbering">Local value numbering</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Loop_optimization" title="Loop optimization">Loop</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Automatic_parallelization" title="Automatic parallelization">Automatic parallelization</a></li>
<li><a href="Automatic_vectorization" title="Automatic vectorization">Automatic vectorization</a></li>
<li><a href="Induction_variable" title="Induction variable">Induction variable</a></li>
<li><a href="Loop_fusion" class="mw-redirect" title="Loop fusion">Loop fusion</a></li>
<li><a href="Loop-invariant_code_motion" title="Loop-invariant code motion">Loop-invariant code motion</a></li>
<li><a href="Loop_inversion" title="Loop inversion">Loop inversion</a></li>
<li><a href="Loop_interchange" title="Loop interchange">Loop interchange</a></li>
<li><a href="Loop_nest_optimization" title="Loop nest optimization">Loop nest optimization</a></li>
<li><a href="Loop_splitting" title="Loop splitting">Loop splitting</a></li>
<li><a href="Loop_unrolling" title="Loop unrolling">Loop unrolling</a></li>
<li><a href="Loop_unswitching" title="Loop unswitching">Loop unswitching</a></li>
<li><a href="Software_pipelining" title="Software pipelining">Software pipelining</a></li>
<li><a href="Strength_reduction" title="Strength reduction">Strength reduction</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Data-flow_analysis" title="Data-flow analysis">Data-flow<br>analysis</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Available_expression" title="Available expression">Available expression</a></li>
<li><a href="Common_subexpression_elimination" title="Common subexpression elimination">Common subexpression elimination</a></li>
<li><a href="Constant_folding" title="Constant folding">Constant folding</a></li>
<li><a href="Dead_store" title="Dead store">Dead store</a> elimination</li>
<li><a href="Induction_variable_recognition_and_elimination" class="mw-redirect" title="Induction variable recognition and elimination">Induction variable recognition and elimination</a></li>
<li><a href="Live-variable_analysis" title="Live-variable analysis">Live-variable analysis</a></li>
<li><a href="Upwards_exposed_uses" title="Upwards exposed uses">Upwards exposed uses</a></li>
<li><a href="Use-define_chain" title="Use-define chain">Use-define chain</a></li>
<li><a href="Reaching_definition" title="Reaching definition">Reaching definitions</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Static_single-assignment_form" title="Static single-assignment form">SSA</a>-based</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Global_value_numbering" class="mw-redirect" title="Global value numbering">Global value numbering</a></li>
<li><a href="Sparse_conditional_constant_propagation" title="Sparse conditional constant propagation">Sparse conditional constant propagation</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Code_generation_(compiler)" title="Code generation (compiler)">Code generation</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Instruction_scheduling" title="Instruction scheduling">Instruction scheduling</a></li>
<li><a href="Instruction_selection" title="Instruction selection">Instruction selection</a></li>
<li><a href="Register_allocation" title="Register allocation">Register allocation</a></li>
<li><a href="Rematerialization" title="Rematerialization">Rematerialization</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Functional</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Deforestation_(computer_science)" title="Deforestation (computer science)">Deforestation</a></li>
<li><a href="Tail_call" title="Tail call">Tail-call elimination</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Global</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Interprocedural_optimization" title="Interprocedural optimization">Interprocedural optimization</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Bounds-checking_elimination" title="Bounds-checking elimination">Bounds-checking elimination</a></li>
<li><a href="Compile-time_function_execution" title="Compile-time function execution">Compile-time function execution</a></li>
<li><a href="Dead-code_elimination" title="Dead-code elimination">Dead-code elimination</a></li>
<li><a href="Expression_templates" title="Expression templates">Expression templates</a></li>
<li><a href="Inline_expansion" title="Inline expansion">Inline expansion</a></li>
<li><a href="Jump_threading" title="Jump threading">Jump threading</a></li>
<li><a href="Partial_evaluation" title="Partial evaluation">Partial evaluation</a></li>
<li><a href="Profile-guided_optimization" title="Profile-guided optimization">Profile-guided optimization</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Static analysis</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Alias_analysis" title="Alias analysis">Alias analysis</a></li>
<li><a href="Control-flow_analysis" title="Control-flow analysis">Control-flow analysis</a></li>
<li><a href="Data-flow_analysis" title="Data-flow analysis">Data-flow analysis</a></li>
<li><a href="Dependence_analysis" title="Dependence analysis">Dependence analysis</a></li>
<li><a href="Escape_analysis" title="Escape analysis">Escape analysis</a></li>
<li><a href="Pointer_analysis" title="Pointer analysis">Pointer analysis</a></li>
<li><a href="Shape_analysis_(program_analysis)" title="Shape analysis (program analysis)">Shape analysis</a></li>
<li><a href="Value_range_analysis" title="Value range analysis">Value range analysis</a></li></ul>
</div></td></tr></tbody></table></div>
<p><br>
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