[PATCH] D128180: [DebugInfo][InstrRef][NFC] Let LDV handle joins for lists of debug ops

[Stephen Tozer via Phabricator via llvm-commits]

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In preparation for adding support for DBG_VALUE_LIST instructions in InstrRefLDV, this patch updates the logic for joining variables at block joins to support joining variables that use multiple debug operands. This is one of the more meaty "logical" changes, although the line count isn't too high - this changes pickVPHILoc to find a valid joined location for every operand, with part of the function being split off into pickValuePHILoc which finds a location for a single operand.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D128180

Files:
  llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp
  llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h

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