[llvm-bugs] [Bug 33038] [PBQP] Assertion `!empty() && "empty range"'

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33038

Lang Hames <lhames at gmail.com> changed:

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

--- Comment #4 from Lang Hames <lhames at gmail.com> ---
Huh. It looks like while spilling one VReg (call it V1) the spiller can cause
the live range for another VReg to become empty. I'm guessing this is an
in-spiller coalescing optimization or something like that.

I've modified initializeGraph to prune such empty intervals in r325632. That
should fix this.

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