[llvm-bugs] [Bug 36264] [SelectionDAG] HandleMergeInputChains gets stuck in infinite loop in calls to AddChains()

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=36264

Nirav Dave <niravd at google.com> changed:

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

--- Comment #2 from Nirav Dave <niravd at google.com> ---
Ah. This isn't actually infinite, just ridiculously slow because we check
through all chain paths to the first non TokenFactor.

rL324491 fixes this by adding a quick redundancy check.

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