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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. Thanks, Sejong From: aprantl at apple.com <aprantl at apple.com> Sent: Monday, April 30, 2018 2:59 PM To: Se Jong Oh

> On Apr 30, 2018, at 2:57 PM, Se Jong Oh <sejooh at microsoft.com> wrote: > > Thanks! It looks like SelectionDAG::salvageDebugInfo handles only addition with constant. You can look at llvm::salvageDebugInfo() for examples on how to handle other situations. -- adrian -------------- next part -------------- An HTML attachment was scrubbed... URL:

...only addition with constant. > > You can look at llvm::salvageDebugInfo() for examples on how to handle other situations. > > -- adrian -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180430/f15300b8/attachment.html>