[LLVMbugs] [Bug 675] NEW: mgrid suffering 70% performance hit against native

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.cs.uiuc.edu/bugs/show_bug.cgi?id=675

           Summary: mgrid suffering 70% performance hit against native
           Product: tools
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P2
         Component: opt
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: jlaskey at apple.com


(*Reminder*) In this case it appears that multiply nested loops have an interference that prevents invariant 
hoisting of code in the inner loop.  May be associated with loop strength reduction.



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