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> On Apr 30, 2018, at 3:16 PM, Se Jong Oh <sejooh at microsoft.com> wrote: > > For cast instructions, llvm::salvageDebugInfo() simply makes dbg.value point to the source of the cast. Since SelectionDAG already has transferDbgValues which can move dbgvalue to the cast source, I think that we can just call it where the truncate is optimized away. That sounds reasonable, yes. Casts