[PATCH] D70565: [MCRegInfo] Add forward sub and super register iterators. (NFC)

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: evandro, qcolombet, paquette, MatzeB, arsenm.
Herald added subscribers: atanasyan, jrtc27, hiraditya, wdng, sdardis.
Herald added a project: LLVM.

This patch adds forward iterators mc_difflist_iterator,
mc_subreg_iterator and mc_superreg_iterator, based on the existing
DiffListIterator. Those are used to provide iterator ranges over
sub- and super-register from TRI, which are slightly more convenient
than the existing MCSubRegIterator/MCSuperRegIterator. Unfortunately,
it duplicates a bit of functionality, but the new iterators are a bit
more convenient (and can be used with various existing iterator
utilities)  and should probably replace the old iterators in the future.

This patch updates some existing users.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D70565

Files:
  llvm/include/llvm/MC/MCRegisterInfo.h
  llvm/lib/CodeGen/MachineVerifier.cpp
  llvm/lib/CodeGen/RegisterScavenging.cpp
  llvm/lib/Target/Mips/MCTargetDesc/MipsOptionRecord.cpp
  llvm/lib/Target/X86/X86RegisterInfo.cpp

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