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• Interprocedural_optimization abstract "Interprocedural optimization (IPO) is a collection of compiler techniques used in computer programming to improve performance in programs containing many frequently used functions of small or medium length. IPO differs from other compiler optimization because it analyzes the entire program; other optimizations look at only a single function, or even a single block of code.IPO seeks to reduce or eliminate duplicate calculations, inefficient use of memory, and to simplify iterative sequences such as loops. If there is a call to another routine that occurs within a loop, IPO analysis may determine that it is best to inline that. Additionally, IPO may re-order the routines for better memory layout and locality.IPO may also include typical compiler optimizations on a whole-program level, for example dead code elimination, which removes code that is never executed. To accomplish this, the compiler tests for branches that are never taken and removes the code in that branch. IPO also tries to ensure better use of constants. Modern compilers offer IPO as an option at compile-time. The actual IPO process may occur at any step between the human-readable source code and producing a finished executable binary program.Whole program optimization is the compiler optimization of a program using information about all the modules in the program. Normally, optimizations are performed on a per module, "compiland", basis; but this approach, while easier to write and test and less demanding of resources during the compilation itself, does not allow certainty about the safety of a number of optimizations such as aggressive inlining and thus cannot perform them even if they would actually turn out to be efficiency gains that do not change the semantics of the emitted object code.Link-time optimization is a type of program optimization performed by a compiler to a program at link time. Link time optimization is relevant in programming languages that compile programs on a file-by-file basis, and then link those files together (such as C and Fortran), rather than all at once (such as Java's "Just in time" (JIT) compilation). Once all files have been compiled separately into object files, a compiler links (merges) the object files into a single file, the executable. As it is in the process of doing this (or immediately thereafter) a compiler with link-time optimization capabilities can apply various forms of interprocedural optimization to the newly merged file. The process of merging the files may have removed the knowledge limitations that occurred in the earlier stages of compilation, allowing for deeper analysis, more optimization, and ultimately better program performance.".
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• Interprocedural_optimization wikiPageWikiLink I.
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• Interprocedural_optimization wikiPageWikiLinkText "IPO".
• Interprocedural_optimization wikiPageWikiLinkText "Interprocedural analysis".
• Interprocedural_optimization wikiPageWikiLinkText "Interprocedural optimization".
• Interprocedural_optimization wikiPageWikiLinkText "Interprocedural_optimization".
• Interprocedural_optimization wikiPageWikiLinkText "Whole-Program Design".
• Interprocedural_optimization wikiPageWikiLinkText "interprocedural analysis".
• Interprocedural_optimization wikiPageWikiLinkText "interprocedural optimization".
• Interprocedural_optimization wikiPageWikiLinkText "whole-program optimization".
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• Interprocedural_optimization subject Category:Compiler_optimizations.
• Interprocedural_optimization hypernym Collection.
• Interprocedural_optimization type Article.
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• Interprocedural_optimization type Article.
• Interprocedural_optimization comment "Interprocedural optimization (IPO) is a collection of compiler techniques used in computer programming to improve performance in programs containing many frequently used functions of small or medium length.".
• Interprocedural_optimization label "Interprocedural optimization".
• Interprocedural_optimization sameAs m.0ctw33.
• Interprocedural_optimization sameAs Межпроцедурная_оптимизация.
• Interprocedural_optimization sameAs Q4288856.
• Interprocedural_optimization sameAs Q4288856.
• Interprocedural_optimization wasDerivedFrom Interprocedural_optimization?oldid=670382297.
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