[PATCH] D70833: [DebugInfo] Support for DW_OP_explicit_pointer (temp2reg).

[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: debug-info, LLVM.
Herald added subscribers: llvm-commits, ormris, hiraditya.

  Summary:

This enables debugger to display de-referenced value of pointer in case temporary is optimized out. It happens in case of reference. This patch need to include some compile time option to enable/disable.

  Testing:

-Added unit test for validation thru llvm-dwarfdump
-check-llvm (LLDB need to be modifed to support this)
-check-debuginfo (the debug info integration tests)


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D70833

Files:
  llvm/docs/LangRef.rst
  llvm/include/llvm/BinaryFormat/Dwarf.def
  llvm/include/llvm/BinaryFormat/Dwarf.h
  llvm/include/llvm/IR/DebugInfoMetadata.h
  llvm/include/llvm/IR/IntrinsicInst.h
  llvm/lib/BinaryFormat/Dwarf.cpp
  llvm/lib/CodeGen/AsmPrinter/DebugLocEntry.h
  llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
  llvm/lib/CodeGen/AsmPrinter/DwarfExpression.cpp
  llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
  llvm/lib/DebugInfo/DWARF/DWARFExpression.cpp
  llvm/lib/IR/AsmWriter.cpp
  llvm/lib/IR/DebugInfoMetadata.cpp
  llvm/lib/IR/IntrinsicInst.cpp
  llvm/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
  llvm/test/DebugInfo/dwarfdump_explicit_pointer.ll
  llvm/test/DebugInfo/explicit_pointer.cc

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