[llvm-bugs] [Bug 34029] New: wrong code with -loop-reroll

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Aug 1 20:29:48 PDT 2017


            Bug ID: 34029
           Summary: wrong code with -loop-reroll
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Loop Optimizer
          Assignee: unassignedbugs at nondot.org
          Reporter: davide at freebsd.org
                CC: efriedma at codeaurora.org, filcab at gmail.com,
                    hfinkel at anl.gov, llvm-bugs at lists.llvm.org,
                    llvm-dev at redking.me.uk

$ ./opt ~/pat.bc | ./lli
checksum = 74640FC
$ ./opt -loop-reroll ~/pat.bc | ./lli
checksum = A3DD5B7F

I'll try to reduce this once I get a chance, but putting it here so it doesn't
get lost.
Also, cc:in Hal and Eli who both did some work in this area recent('ish)ly.

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