[PATCH] D91595: [Debug] Support checking Machine IR debug info

[Xiang Zhang via Phabricator via llvm-commits]

xiangzhangllvm created this revision.
xiangzhangllvm added reviewers: LuoYuanke, pengfei, jmorse, craig.topper, MaskRay, annita.zhang.
Herald added subscribers: llvm-commits, hiraditya, mgorny.
Herald added a project: LLVM.
xiangzhangllvm requested review of this revision.

Add mir-check-debug pass to check MIR-level debug info.

For  IR-level, currently, LLVM have **debugify** + **check-debugify** to generate debug IR.
Much like the IR-level pass **debugify**, **mir-debugify** inserts sequentially increasing line locations to each MachineInstr in a Module,
But there is no equivalent MIR-level **check-debugify** pass, So now we support it at "**mir-check-debug**".

Currently (our first step), what **mir-check-debug** do is similar with **check-debugify**, to check the integrity of line info in DILocation and DILocalVariable
which **mir-debugify** generated before.

The 3 tests in patch show how this tools work.


https://reviews.llvm.org/D91595

Files:
  llvm/include/llvm/CodeGen/Passes.h
  llvm/include/llvm/CodeGen/TargetPassConfig.h
  llvm/include/llvm/InitializePasses.h
  llvm/lib/CodeGen/CMakeLists.txt
  llvm/lib/CodeGen/CodeGen.cpp
  llvm/lib/CodeGen/MachineCheckDebug.cpp
  llvm/lib/CodeGen/MachineDebugify.cpp
  llvm/lib/CodeGen/TargetPassConfig.cpp
  llvm/test/CodeGen/Generic/MIRDebugify/check-line-and-variables-x.mir
  llvm/test/CodeGen/Generic/MIRDebugify/check-line-and-variables.ll
  llvm/test/CodeGen/Generic/MIRDebugify/check-line-and-variables.mir
  llvm/test/CodeGen/Generic/MIRDebugify/locations-and-values.mir
  llvm/utils/gn/secondary/llvm/lib/CodeGen/BUILD.gn

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