[all-commits] [llvm/llvm-project] ac1ba1: [CodeGen] Introduce a VirtRegOrUnit class to hold ...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ac1ba1f9dd7013852cd27f514467f57ee0e6ed16
      https://github.com/llvm/llvm-project/commit/ac1ba1f9dd7013852cd27f514467f57ee0e6ed16
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2025-01-24 (Fri, 24 Jan 2025)

  Changed paths:
    M llvm/include/llvm/CodeGen/Register.h
    M llvm/include/llvm/CodeGen/TargetRegisterInfo.h
    M llvm/lib/CodeGen/LiveIntervals.cpp
    M llvm/lib/CodeGen/MachineVerifier.cpp

  Log Message:
  -----------
  [CodeGen] Introduce a VirtRegOrUnit class to hold virtual reg or physical reg unit. NFC (#123768)

LiveIntervals and MachineVerifier were previously using Register to
store this, but reg units are different than physical registers. One
important difference is that 0 is a valid reg unit number, but it is not
a valid phyiscal register.

This patch introduces a new VirtRegOrUnit class that is distinct from
Register. It can be be converted to/from a virtual Register or a
MCRegUnit. I've made all conversions explicit and used assertions to
check the validity.

I also fixed a place in MachineVerifier that was ignoring reg unit 0.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications