[llvm-bugs] [Bug 41054] New: misc-incorrect-roundings does not catch incorrect rounding within the Conditional Operator

via llvm-bugs llvm-bugs at lists.llvm.org
Wed Mar 13 08:59:19 PDT 2019


https://bugs.llvm.org/show_bug.cgi?id=41054

            Bug ID: 41054
           Summary: misc-incorrect-roundings does not catch incorrect
                    rounding within the Conditional Operator
           Product: clang
           Version: 6.0
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Static Analyzer
          Assignee: dcoughlin at apple.com
          Reporter: lennart.cormin at ericsson.com
                CC: dcoughlin at apple.com, llvm-bugs at lists.llvm.org

I run the checker misc-incorrect-roundings on this piece of code:

return (int) (x < 0 ? x - 0.5 : x + 0.5);

In this case Clang tidy does not pick up on the “x + 0.5” as being an incorrect
rounding, which it is.

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