Jeremy Morse 20bb9fe565 [LiveDebugValues] Install an implementation-picking LiveDebugValues pass ...

This patch renames the current LiveDebugValues class to "VarLocBasedLDV"
and removes the pass-registration code from it. It creates a separate
LiveDebugValues class that deals with pass registration and management,
that calls through to VarLocBasedLDV::ExtendRanges when
runOnMachineFunction is called. This is done through the "LDVImpl"
abstract class, so that a future patch can install the new
instruction-referencing LiveDebugValues implementation and have it
picked at runtime.

No functional change is intended, just shuffling responsibilities.

Differential Revision: https://reviews.llvm.org/D83046

2020-08-22 14:50:22 +01:00

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