| Attributes | Values |
|---|
| rdf:type
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| rdfs:seeAlso
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| Description
| - This software is a significant extension of the clang LLVM frontend with pragma support. Pragmas can be used to give additional information to the compiler. There was no such support in LLVM before and because of support for following task, it was necessary to significanly modify the existing clang frontend and add required functionality. Usage of pragmas is mainly in following compiler optimizaitons: - alias analysis - mark block of code where pointers cannot alias - vectorization - e.g. to specify that the programmer want to use SIMD insturctions regardless on price or other - or ignore dependencies between loop iterations - + to add other information - marking of specialozed instructions - it is possible to select pieces of source code that should be executed directly in hardware To keep the pragmas in the source code are special annotations used, the advantage is that compared to debug information, that annotations are kjept even after agressive optimizations.
- This software is a significant extension of the clang LLVM frontend with pragma support. Pragmas can be used to give additional information to the compiler. There was no such support in LLVM before and because of support for following task, it was necessary to significanly modify the existing clang frontend and add required functionality. Usage of pragmas is mainly in following compiler optimizaitons: - alias analysis - mark block of code where pointers cannot alias - vectorization - e.g. to specify that the programmer want to use SIMD insturctions regardless on price or other - or ignore dependencies between loop iterations - + to add other information - marking of specialozed instructions - it is possible to select pieces of source code that should be executed directly in hardware To keep the pragmas in the source code are special annotations used, the advantage is that compared to debug information, that annotations are kjept even after agressive optimizations. (en)
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| Title
| - C Language Compiler Frontend with Pragma Support
- C Language Compiler Frontend with Pragma Support (en)
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| skos:prefLabel
| - C Language Compiler Frontend with Pragma Support
- C Language Compiler Frontend with Pragma Support (en)
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| skos:notation
| - RIV/00216305:26230/14:PR27335!RIV15-MSM-26230___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...onomickeParametry
| - Software se poskytuje zdarma na základě licenční smlouvy.
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/00216305:26230/14:PR27335
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| http://linked.open...terniIdentifikace
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - LLVM, clang, pragma, vectorization, compilers (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
| |
| http://linked.open...echnickeParametry
| - Jedná se o značné rozšíření frontendu překladače LLVM clang o podporu specifikace pragmat. K otestování je potřeba stáhnotu zdrjové kódy nástroje LLVM ve verzi 3.2, nahrát obsah archivu do nástroje llvm/tools a přejmenovat na clang. Pak přeložit LLVM podle návodu na llvm.org/docs/GettingStarted.html. Po překladu pak spustit clang -target x86 -emit-llvm -S -o out.s -Wall test.c kde test.c je např. toto: int a[200]; int main() { #pragma ivdep for (int i = 0; i < 100; i++) a[i] = i; return 0; } ve výsledném souboru test.ll je pak vidět označení smyčky pomocí llvm.var.annotation. Je porporovaná řada pragmat jako přávě tento ivdep, vector, novector, ise. Lze jednoduše dodat další typy pragmat. Jsou také prováděny různé sémantické kontroly správného použití těchto pragmat.
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| http://linked.open...iv/tvurceVysledku
| - Hruška, Tomáš
- Husár, Adam
- Masařík, Karel
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| http://linked.open...avai/riv/vlastnik
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| http://linked.open...itiJinymSubjektem
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| http://localhost/t...ganizacniJednotka
| |
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