[PATCH] D97511: [AArch64][GlobalISel] Import FMOV patterns rather than manually selecting it

[Jessica Paquette via Phabricator via llvm-commits]

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There are existing patterns for FMOVHi, FMOVSi, and FMOVDi in AArch64InstrFormats.td.

Importing these allows us to remove the manual selection code for FMOV.

It also allows us to select FMOVHi for non-zero constants when we have full fp-16 support.

Refactor some of the code in AArch64InstrFormats.td so that we can create equivalent custom renderers in GlobalISel.


https://reviews.llvm.org/D97511

Files:
  llvm/lib/Target/AArch64/AArch64InstrFormats.td
  llvm/lib/Target/AArch64/GISel/AArch64InstructionSelector.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/select-fp16-fconstant.mir

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