[llvm-bugs] [Bug 25439] New: Non-affine region scalar read uses original value

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=25439

            Bug ID: 25439
           Summary: Non-affine region scalar read uses original value
           Product: Projects
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Polly
          Assignee: polly-dev at googlegroups.com
          Reporter: doerfert at cs.uni-saarland.de
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 15238
  --> https://llvm.org/bugs/attachment.cgi?id=15238&action=edit
Testcase

Instead of a new value the copy of the scalar %cmp in the non-affine region
uses the original PHI node %height.lcsssa. __Later__ the PHI node is copied and
assumed to escape as there is a user not in the region (namely the copied
%cmp). The problem seems to be a missing scalar access in the non-affine region
or at least a mapping that would use a reloaded value not the original PHI.

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