[llvm-bugs] [Bug 33656] New: r306711 makes optimization extremely slow

via llvm-bugs llvm-bugs at lists.llvm.org
Fri Jun 30 07:08:52 PDT 2017


            Bug ID: 33656
           Summary: r306711 makes optimization extremely slow
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Core LLVM classes
          Assignee: unassignedbugs at nondot.org
          Reporter: geek4civic at gmail.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 18734
  --> https://bugs.llvm.org/attachment.cgi?id=18734&action=edit
Comes from StaticAnalyzer/Checkers/StdLibraryFunctionsChecker.cpp

$ bin/opt -loop-unroll p.bc -o /dev/null

w/o r306711
real    0m0.656s
user    0m0.648s
sys     0m0.008s

with r306711
(Checking. Will report later)

Of course, this assumes LLVM_ENABLE_ASSERTIONS=ON.

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