[LLVMbugs] [Bug 1792] LLVM unable to unroll trivial code

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Mon Nov 12 15:12:38 PST 2007


Nick Lewycky <nlewycky at google.com> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|                            |DUPLICATE

--- Comment #1 from Nick Lewycky <nlewycky at google.com>  2007-11-12 17:12:37 ---
Here's what -debug -loop-unroll has to say:

  Loop Unroll: F[f] Loop %bb
    Trip Count = 32
    Loop Size = 5
    TOO LARGE TO UNROLL: 160>100

You can crank up the threshold with -unroll-threshold=500 but the result is a
huge mess. This code is a pop-counter, marking it a dupe of PR1488.

*** This bug has been marked as a duplicate of bug 1488 ***

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