[PATCH] D88589: [DebugInfo] Handle dbg.values with multiple variable location operands in ISel

[Stephen Tozer via Phabricator via llvm-commits]

StephenTozer created this revision.
StephenTozer added reviewers: aprantl, djtodoro, vsk, probinson.
StephenTozer added a project: debug-info.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.
StephenTozer requested review of this revision.

This patch continues implementing the ISel support for multi-location-operand debug values by reading and processing dbg.values that use DIArgList. This patch does not add support for producing DBG_VALUE_LIST; that is added in a separate patch in this stack.

The most substantial change is naturally in `handleDebugValue` and some of the functions that it calls. Outside of this, `salvageDebugInfo` and `transferDbgValues` have been modified to replace individual operands instead of the entire value; dangling debug info for variadic debug values is not currently supported (but may be added in a later patch).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D88589

Files:
  llvm/include/llvm/CodeGen/SelectionDAG.h
  llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h

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