A Flang Plugin for Fortran Feature Characterization

As new compute systems are developed, there is still a need to compile and execute codes authored in Fortran on these leading edge systems. In order to achieve this, development of compilers that support the latest hardware is continuously under development. Though the specification of Fortran is ex...

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Veröffentlicht in:SC24-W: Workshops of the International Conference for High Performance Computing, Networking, Storage and Analysis S. 961 - 967
Hauptverfasser: Cabrera, Anthony M., Bernholdt, David E.
Format: Tagungsbericht
Sprache:Englisch
Veröffentlicht: IEEE 17.11.2024
Schlagworte:
Codes
compiler
Feature extraction
Flang
Fortran
grammar
Instruments
Leadership
Legged locomotion
Libraries
LLVM
Manuals
plugin
Programming
Semantics
Software
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Abstract As new compute systems are developed, there is still a need to compile and execute codes authored in Fortran on these leading edge systems. In order to achieve this, development of compilers that support the latest hardware is continuously under development. Though the specification of Fortran is extensive, it is helpful to compiler authors to be able to prioritize the development of key features in order to get certain codes deemed important, e.g., applications of interest to leadership computing facilities, executable on leading edge compute systems. Identifying key features though is largely done through querying software experts or users of the Fortran applications of interest, who then manually report what features are and are not present. This exercise can both time consuming and error prone. To automate this process, we present a compiler plugin to Flang, the Fortran frontend for LLVM. This plugin is a tool that operates on the parse tree representation generated by Flang and detects key features based on walking parse tree nodes that correspond to features of interest. We show the result of our tool on four applications, three of which were manually profiled by software experts. We show the discrepancies between our tool and the manual characterization of the three applications, as well as generate a characterization for an application not yet profiled. We intend to open-source our tool in order to invite the community to benefit from the tool and make contributions for other features.
AbstractList As new compute systems are developed, there is still a need to compile and execute codes authored in Fortran on these leading edge systems. In order to achieve this, development of compilers that support the latest hardware is continuously under development. Though the specification of Fortran is extensive, it is helpful to compiler authors to be able to prioritize the development of key features in order to get certain codes deemed important, e.g., applications of interest to leadership computing facilities, executable on leading edge compute systems. Identifying key features though is largely done through querying software experts or users of the Fortran applications of interest, who then manually report what features are and are not present. This exercise can both time consuming and error prone. To automate this process, we present a compiler plugin to Flang, the Fortran frontend for LLVM. This plugin is a tool that operates on the parse tree representation generated by Flang and detects key features based on walking parse tree nodes that correspond to features of interest. We show the result of our tool on four applications, three of which were manually profiled by software experts. We show the discrepancies between our tool and the manual characterization of the three applications, as well as generate a characterization for an application not yet profiled. We intend to open-source our tool in order to invite the community to benefit from the tool and make contributions for other features.
Author Bernholdt, David E.
Cabrera, Anthony M.
Author_xml – sequence: 1
  givenname: Anthony M.
  surname: Cabrera
  fullname: Cabrera, Anthony M.
  email: cabreraam@ornl.gov
  organization: Oak Ridge National Laboratory,Computer Science and Mathematics Division,Oak Ridge,TN,USA
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  givenname: David E.
  surname: Bernholdt
  fullname: Bernholdt, David E.
  email: bernholdtde@ornl.gov
  organization: Oak Ridge National Laboratory,Computer Science and Mathematics Division,Oak Ridge,TN,USA
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SubjectTerms Codes
compiler
Feature extraction
Flang
Fortran
grammar
Instruments
Leadership
Legged locomotion
Libraries
LLVM
Manuals
plugin
Programming
Semantics
Software
Title A Flang Plugin for Fortran Feature Characterization
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