[llvm-bugs] [Bug 32623] New: Too lax dependences

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Apr 11 03:46:46 PDT 2017


            Bug ID: 32623
           Summary: Too lax dependences
           Product: Polly
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Optimizer
          Assignee: polly-dev at googlegroups.com
          Reporter: doerfert at cs.uni-saarland.de
                CC: llvm-bugs at lists.llvm.org

Created attachment 18269
  --> https://bugs.llvm.org/attachment.cgi?id=18269&action=edit
test case

Probably since 490659bdcf7557513 [https://reviews.llvm.org/D31386] Polly
produces too lax dependences. For the attached test case there is no dependence
ordering S2 and S0 even though one reads C[i] and one writes it. The jscop
attached reorders them and it seem to pass all validity checks.

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