[PATCH] D45341: [DebugInfo] Convert intrinsic llvm.dbg.label to MachineInstr.

[Hsiangkai Wang via Phabricator via llvm-commits]

HsiangKai created this revision.
HsiangKai added reviewers: rnk, chenwj, aprantl, probinson.
Herald added subscribers: JDevlieghere, MatzeB.

In order to convert LLVM IR to MachineInstr, we need a new TargetOpcode,
DBG_LABEL, to 'lower' intrinsic llvm.dbg.label. The patch
creates this new TargetOpcode and convert intrinsic llvm.dbg.label to
MachineInstr through SelectionDAG.

In SelectionDAG, debug information is stored in SDDbgInfo. We create a
new data member of SDDbgInfo for labels and use the new data member,
SDDbgLabel, to create DBG_LABEL MachineInstr.

The new DBG_LABEL MachineInstr uses label metadata from LLVM IR as its
parameter. So, the backend could get metadata information of labels from
DBG_LABEL MachineInstr.


Repository:
  rL LLVM

https://reviews.llvm.org/D45341

Files:
  include/llvm/CodeGen/MachineInstr.h
  include/llvm/CodeGen/SelectionDAG.h
  include/llvm/Support/TargetOpcodes.def
  include/llvm/Target/Target.td
  lib/CodeGen/AsmPrinter/AsmPrinter.cpp
  lib/CodeGen/MachineInstr.cpp
  lib/CodeGen/PatchableFunction.cpp
  lib/CodeGen/SelectionDAG/InstrEmitter.cpp
  lib/CodeGen/SelectionDAG/InstrEmitter.h
  lib/CodeGen/SelectionDAG/SDNodeDbgValue.h
  lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
  lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  test/DebugInfo/Generic/debug-label-mi.ll

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