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- Partial_redundancy_elimination abstract "In compiler theory, partial redundancy elimination (PRE) is a compiler optimization that eliminates expressions that are redundant on some but not necessarily all paths through a program. PRE is a form of common subexpression elimination.An expression is called partially redundant if the value computed by the expression is already available on some but not all paths through a program to that expression. An expression is fully redundant if the value computed by the expression is available on all paths through the program to that expression. PRE can eliminate partially redundant expressions by inserting the partially redundant expression on the paths that do not already compute it, thereby making the partially redundant expression fully redundant.For instance, in the following code:the expression x+4 assigned to z is partially redundant because it is computed twice if some_condition is true. PRE would perform code motion on the expression to yield the following optimized code:An interesting property of PRE is that 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 injured partial redundancies, thereby effectively performing strength reduction. This makes PRE one of the most important optimizations in optimizing compilers. Traditionally, PRE is applied to lexically equivalent expressions, but recently formulations of PRE based on static single assignment form have been published that apply the PRE algorithm to values instead of expressions, unifying PRE and global value numbering.".
- Partial_redundancy_elimination wikiPageID "2209268".
- Partial_redundancy_elimination wikiPageLength "3711".
- Partial_redundancy_elimination wikiPageOutDegree "14".
- Partial_redundancy_elimination wikiPageRevisionID "660150095".
- Partial_redundancy_elimination wikiPageWikiLink Bernhard_Steffen_(computer_scientist).
- Partial_redundancy_elimination wikiPageWikiLink Category:Articles_with_example_code.
- Partial_redundancy_elimination wikiPageWikiLink Category:Compiler_optimizations.
- Partial_redundancy_elimination wikiPageWikiLink Code_motion.
- Partial_redundancy_elimination wikiPageWikiLink Common_subexpression_elimination.
- Partial_redundancy_elimination wikiPageWikiLink Compiler_construction.
- Partial_redundancy_elimination wikiPageWikiLink Expression_(computer_science).
- Partial_redundancy_elimination wikiPageWikiLink Global_value_numbering.
- Partial_redundancy_elimination wikiPageWikiLink Loop-invariant_code_motion.
- Partial_redundancy_elimination wikiPageWikiLink Optimizing_compiler.
- Partial_redundancy_elimination wikiPageWikiLink Static_single_assignment_form.
- Partial_redundancy_elimination wikiPageWikiLink Strength_reduction.
- Partial_redundancy_elimination wikiPageWikiLink Value_(computer_science).
- Partial_redundancy_elimination wikiPageWikiLinkText "Partial redundancy elimination".
- Partial_redundancy_elimination wikiPageWikiLinkText "partial redundancy elimination".
- Partial_redundancy_elimination wikiPageWikiLinkText "redundant code elimination".
- Partial_redundancy_elimination wikiPageWikiLinkText "redundant read elimination".
- Partial_redundancy_elimination wikiPageUsesTemplate Template:No_footnotes.
- Partial_redundancy_elimination subject Category:Articles_with_example_code.
- Partial_redundancy_elimination subject Category:Compiler_optimizations.
- Partial_redundancy_elimination hypernym Optimization.
- Partial_redundancy_elimination type Software.
- Partial_redundancy_elimination comment "In compiler theory, partial redundancy elimination (PRE) is a compiler optimization that eliminates expressions that are redundant on some but not necessarily all paths through a program. PRE is a form of common subexpression elimination.An expression is called partially redundant if the value computed by the expression is already available on some but not all paths through a program to that expression.".
- Partial_redundancy_elimination label "Partial redundancy elimination".
- Partial_redundancy_elimination sameAs Q7140383.
- Partial_redundancy_elimination sameAs m.06w2h5.
- Partial_redundancy_elimination sameAs Q7140383.
- Partial_redundancy_elimination wasDerivedFrom Partial_redundancy_elimination?oldid=660150095.
- Partial_redundancy_elimination isPrimaryTopicOf Partial_redundancy_elimination.