[PATCH] D150216: Add support for salvaging debug info from icmp instrcuctions.

[Shubham Sandeep Rastogi via Phabricator via llvm-commits]

rastogishubham created this revision.
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salvageDebugInfo() is a function that allows us to reatin debug info for instructions that have been optimized out. Currently, it doesn't support salvaging the debug information from icmp instrcutions, but DWARF expressions can emulate an icmp by using the DWARF conditional expressions. This patch adds support for salvaging debug information from icmp instructions.


https://reviews.llvm.org/D150216

Files:
  llvm/lib/IR/DebugInfoMetadata.cpp
  llvm/lib/Transforms/Utils/Local.cpp
  llvm/test/DebugInfo/salvage-icmp.ll

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