Dan Gohman affbc66f60 RecursivelyDeleteTriviallyDeadInstructions only needs a ...

Value, not an Instruction, so casting is not necessary. Also,
it's theoretically possible that the Value is not an
Instruction, since WeakVH follows RAUWs.

llvm-svn: 127427

2011-03-10 20:57:44 +00:00

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