[llvm-bugs] [Bug 26681] New: Complicated acccess description for multiple div & mod operations. SPEC2006 h264 bug

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https://llvm.org/bugs/show_bug.cgi?id=26681

            Bug ID: 26681
           Summary: Complicated acccess description for multiple div & mod
                    operations. SPEC2006 h264 bug
           Product: Polly
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Other
          Assignee: polly-dev at googlegroups.com
          Reporter: doerfert at cs.uni-saarland.de
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 15926
  --> https://llvm.org/bugs/attachment.cgi?id=15926&action=edit
Test case

The access description of the %tmp3 access is very complicated because of the
divisions and modulo operations. During the hoisting this will cause isl to
take "forever" to create an affine functio from the access set
(isl_pw_multi_aff_from_set). We are therefore stuck in
IslNodeBuilder::preloadUnconditionally.

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