[LLVMbugs] [Bug 24338] New: warn about undefined behaviour if division result is not representable

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=24338

            Bug ID: 24338
           Summary: warn about undefined behaviour if division result is
                    not representable
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: davide at freebsd.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

If the quotient a/b is not representable, a/b and a%b have undefined behavior.
This is true at least in recent C and I guess it's true in C++ as well
(although I didn't check). It will be useful if clang would warn when this
happen.
Trivial example: INT_MIN % -1

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