[llvm-bugs] [Bug 47966] New: Compiling time deg caused by ebf3b18 - [Scheduling] Implement a new way to cluster loads/stores

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47966

            Bug ID: 47966
           Summary: Compiling time deg caused by ebf3b18 - [Scheduling]
                    Implement a new way to cluster loads/stores
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: AArch64
          Assignee: unassignedbugs at nondot.org
          Reporter: qshanz at cn.ibm.com
                CC: arnaud.degrandmaison at arm.com,
                    llvm-bugs at lists.llvm.org, smithp352 at googlemail.com,
                    Ties.Stuij at arm.com

Created attachment 24098
  --> https://bugs.llvm.org/attachment.cgi?id=24098&action=edit
AArch64 tests

>From Owen:
> I’m seeing significant compile time problems introduced by this change on AArch64, with a worst case example taking >10 minutes to compile.  The root cause seems to be the IsReachable() calls introduced here - they’re not cheap, and they’re being called a lot.  Is there some way we can back off or limit the number of queries here?

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