[PATCH] D70385: [DebugInfo] Support for DW_OP_implicit_pointer (for mem2reg optimization)

[Alok Kumar Sharma via Phabricator via llvm-commits]

alok created this revision.
alok added reviewers: aprantl, probinson, dblaikie, jmorse, jini.susan.george, SouraVX, awpandey.
alok added projects: LLVM, debug-info.
Herald added subscribers: llvm-commits, hiraditya.

This patch (5/N) stems from D69787 <https://reviews.llvm.org/D69787>

  Summary:
  
    Just invoked salvaging debug info function before deleting the instructions.
  
  Testing:
  
    - Added unit tests for validation of LLVM IR and object file thru llvm-dwarfdump
    - check-llvm, and an end-to-end test using gnu GDB to debug an optimized
        program (LLDB need to be enhanced to support).
    - check-debuginfo (the debug info integration tests)


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D70385

Files:
  llvm/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
  llvm/test/DebugInfo/dwarfdump-implicit_pointer_mem2reg.c
  llvm/test/DebugInfo/implicit_pointer_mem2reg.c

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