[PATCH] D130883: [MachineInstrBuilder] Introduce MIMetadata to simplify metadata propagation

[Marco Elver via Phabricator via llvm-commits]

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In many places DebugLoc and PCSections metadata are just copied along to
propagate them through MachineInstrs. Simplify doing so by bundling them
up in a MIMetadata class that replaces the DebugLoc argument to most
BuildMI() variants.

The DebugLoc-only constructors allow implicit construction, so that
existing usage of `BuildMI(.., DL, ..)` works as before, and the rest of
the codebase using BuildMI() does not require changes.

NFC.

Depends on D130882 <https://reviews.llvm.org/D130882>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D130883

Files:
  llvm/include/llvm/CodeGen/MachineInstrBuilder.h

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