[LLVMbugs] [Bug 22822] Aggressive optimization breaks the code and removes checks
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Fri Mar 6 08:11:49 PST 2015
http://llvm.org/bugs/show_bug.cgi?id=22822
David Blaikie <dblaikie at gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |dblaikie at gmail.com
Resolution|--- |INVALID
--- Comment #1 from David Blaikie <dblaikie at gmail.com> ---
Looks like undefined behavior to me.
signed integer overflow (as happens at the beginning of the call to checked_add
when passed max_int) is undefined. Since your program unconditionally executes
that addition, the behavior of the entire program is undefined - nothing it
does, even before the point of the addition, is guaranteed by the C++ standard.
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