[PATCH] D42541: [DeadArgumentElimination] Preserve llvm.dbg.values's first argument

[Adrian Prantl via Phabricator via llvm-commits]

aprantl added a comment.

Thanks! Could you please explain what the dead argument elimination pass is doing and what you patch changes?

I'm worried that this would cause different code being generated depending on whether debug info is enabled or not. In LLVM we consider it a bug if debug info has any effect on the generated code. Instead we have llvm::salvageDebugInfo() to preserve debug info from deleted instructions.


https://reviews.llvm.org/D42541