[llvm-bugs] [Bug 30617] New: 3.9 performance regression in sudoku solver [ARM/AARCH64]

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=30617

            Bug ID: 30617
           Summary: 3.9 performance regression in sudoku solver
                    [ARM/AARCH64]
           Product: libraries
           Version: 3.9
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: ARM
          Assignee: unassignedbugs at nondot.org
          Reporter: tulipawn at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 17403
  --> https://llvm.org/bugs/attachment.cgi?id=17403&action=edit
benchmark source files

Just a heads-up, e.g. on ARM the rust benchmark takes:

$ ./sudoku > /dev/null

llvm 3.8: 1.35s
llvm 3.9: 1.62s

Should reproduce in clang, both C and Rust sources attached.

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