Lifetime-sensitive modulo scheduling

  • Authors:
  • Richard A. Huff

  • Affiliations:
  • Cornell Univ., Ithaca, NY

  • Venue:
  • PLDI '93 Proceedings of the ACM SIGPLAN 1993 conference on Programming language design and implementation
  • Year:
  • 1993

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Abstract

This paper shows how to software pipeline a loop for minimal register pressure without sacrificing the loop's minimum execution time. This novel bidirectional slack-scheduling method has been implemented in a FORTRAN compiler and tested on many scientific benchmarks. The empirical results—when measured against an absolute lower bound on execution time, and against a novel schedule-independent absolute lower bound on register pressure—indicate near-optimal performance.