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From "Matthias Boehm (JIRA)" <>
Subject [jira] [Created] (SYSTEMML-1832) Redundant checkpoint instructions before loops
Date Wed, 09 Aug 2017 01:22:00 GMT
Matthias Boehm created SYSTEMML-1832:

             Summary: Redundant checkpoint instructions before loops
                 Key: SYSTEMML-1832
             Project: SystemML
          Issue Type: Bug
            Reporter: Matthias Boehm

Static rewrites include HOP DAG and statement block rewrites. We apply these rewrites multiple
times during compilation (e.g., rewrites followed by multiple passes of IPA). Some of the
static rewrites such as {{RewriteInjectSparkLoopCheckpointing}} assume that they are called
once for a program. Applying them multiple times leads to redundant statement blocks with
redundant checkpoint instructions. Accordingly, IPA should explicitly disable such rewrites.

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