[llvm-bugs] [Bug 25716] New: Long compile due to isl coalescing

via llvm-bugs llvm-bugs at lists.llvm.org
Wed Dec 2 10:35:07 PST 2015


            Bug ID: 25716
           Summary: Long compile due to isl coalescing
           Product: Projects
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Polly
          Assignee: polly-dev at googlegroups.com
          Reporter: chrisj at codeaurora.org
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 15381
  --> https://llvm.org/bugs/attachment.cgi?id=15381&action=edit
reduced test


opt  -polly-process-unprofitable -polly-code-generator=isl -polly-scops
-analyze compile_time.ll

Found that the quota is being hit in Scop::buildDomainsWithBranchConstraints in
the the coalescing of SuccDomain.

SuccDomain = isl_set_coalesce(SuccDomain);

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