[all-commits] [llvm/llvm-project] 739a96: [RegAlloc] Don't call always-true ShouldAllocClass...

[Alexis Engelke via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 739a9605677dd736971b17a7888f9d18fd245904
      https://github.com/llvm/llvm-project/commit/739a9605677dd736971b17a7888f9d18fd245904
  Author: Alexis Engelke <engelke at in.tum.de>
  Date:   2024-06-21 (Fri, 21 Jun 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/RegAllocCommon.h
    M llvm/include/llvm/CodeGen/RegAllocFast.h
    M llvm/include/llvm/Passes/PassBuilder.h
    M llvm/lib/CodeGen/RegAllocBase.cpp
    M llvm/lib/CodeGen/RegAllocBase.h
    M llvm/lib/CodeGen/RegAllocBasic.cpp
    M llvm/lib/CodeGen/RegAllocFast.cpp
    M llvm/lib/CodeGen/RegAllocGreedy.cpp
    M llvm/lib/CodeGen/RegAllocGreedy.h
    M llvm/lib/Passes/PassBuilder.cpp

  Log Message:
  -----------
  [RegAlloc] Don't call always-true ShouldAllocClass (#96296)

Previously, there was at least one virtual function call for every
allocated register. The only users of this feature are AMDGPU and RISC-V
(RVV), other targets don't use this. To easily identify these cases,
change the default functor to nullptr and don't call it for every
allocated register.



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