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view source for data dependency wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in view source for data dependency add languages article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file page information get shortened url switch to legacy parser in other projects wikidata item appearance move to sidebar hide data dependency you do not have permission to edit this page for the following reason this ip address range has been globally blocked this does not affect your ability to read wikipedia pages most people who see this message have done nothing wrong some kinds of blocks restrict editing from specific service providers or telecom companies in response to recent abuse or vandalism and can sometimes affect other users who are unrelated to that abuse review the information below for assistance if you do not believe that you have done anything wrong this block affects editing on all wikimedia wikis the ip address or range 5 135 0 0 16 has been globally blocked by jon kolbert for the following reason s open proxy webhost visit the faq if you are affected this block will expire on 04 29 8 january 2027 your current ip address is 5 135 42 194 even while globally blocked you will usually still be able to edit pages on meta wiki if you believe you were blocked by mistake you can find additional information and instructions in the stewards block wizard other useful links global blocks help i have been blocked you can view and copy the source of this page anti dependency write after read an anti dependency occurs when an instruction requires a value that is later updated a violation of an anti dependency leads to a write after read war hazard in the following example instruction 2 anti depends on instruction 3 the ordering of these instructions cannot be changed nor can they be executed in parallel possibly changing the instruction ordering as this would affect the final value of a 1 b 3 2 a b 1 3 b 7 example mul r3 r1 r2 add r2 r5 r6 it is clear that there is anti dependence between these 2 instructions at first we read r2 then in second instruction we are writing a new value for it an anti dependency is an example of a name dependency that is renaming of variables could remove the dependency as in the next example 1 b 3 n b2 b 2 a b2 1 3 b 7 a new variable b2 has been declared as a copy of b in a new instruction instruction n the anti dependency between 2 and 3 has been removed meaning that these instructions may now be executed in parallel note that there is still a read after write dependency instruction 2 is truly dependent on instruction n which is truly dependent upon instruction 1 this dependency existed in the original version where instruction 2 was truly dependent on instruction 1 this dependency cannot be safely removed ref name architecture return to data dependency retrieved from https en wikipedia org wiki data_dependency privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search view source for data dependency add languages add topic