[all-commits] [llvm/llvm-project] 05e6bb: [SelectionDAG] Add an ISD::CLEAR_CACHE node to low...

[Roger Ferrer Ibáñez via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 05e6bb40ebfd285cc87f7ce326b7ba76c3c7f870
      https://github.com/llvm/llvm-project/commit/05e6bb40ebfd285cc87f7ce326b7ba76c3c7f870
  Author: Roger Ferrer Ibáñez <rofirrim at gmail.com>
  Date:   2024-05-30 (Thu, 30 May 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/ISDOpcodes.h
    M llvm/include/llvm/CodeGen/TargetLowering.h
    M llvm/include/llvm/IR/RuntimeLibcalls.def
    M llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
    M llvm/lib/CodeGen/TargetLoweringBase.cpp
    M llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
    M llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.h
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/lib/Target/X86/X86ISelLowering.h

  Log Message:
  -----------
  [SelectionDAG] Add an ISD::CLEAR_CACHE node to lower llvm.clear_cache (#93795)

The current way of lowering `llvm.clear_cache` is a bit unusual. As
suggested by Matt Arsenault we are better off using an ISD node.

This change introduces a new `ISD::CLEAR_CACHE`, registers a new libcall
by default named `__clear_cache` and the default legalisation is a
libcall.

This is preparatory work for a custom lowering of `ISD::CLEAR_CACHE`
needed by RISC-V on some platforms.



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