[LLVMbugs] [Bug 17714] Non-deterministic behavior when using LoopInfo pass in LLVM

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17714

Bill Wendling <isanbard at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #3 from Bill Wendling <isanbard at gmail.com> ---
I don't think that this is real non-deterministic behavior. What's happening is
that the memory for the loop analysis is sometimes being reused between
function passes. So the map is sometimes associating a basic block with the
address of a previous LoopInfo object.

For instance, if you iterate over the map and try to emit the LoopInfo object,
it will fail because that object is no longer in valid memory.

Anyway, it sucks, but this isn't an LLVM bug. :-(

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