[all-commits] [llvm/llvm-project] e842c0: [IR] Use std::nullopt instead of None (NFC)

[kazutakahirata via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e842c06c2d52ae1d60db7ed528ea3f4215a0aad6
      https://github.com/llvm/llvm-project/commit/e842c06c2d52ae1d60db7ed528ea3f4215a0aad6
  Author: Kazu Hirata <kazu at google.com>
  Date:   2022-12-02 (Fri, 02 Dec 2022)

  Changed paths:
    M llvm/include/llvm/IR/Constants.h
    M llvm/include/llvm/IR/DIBuilder.h
    M llvm/include/llvm/IR/DebugInfoMetadata.h
    M llvm/include/llvm/IR/GCStrategy.h
    M llvm/include/llvm/IR/GlobalVariable.h
    M llvm/include/llvm/IR/IRBuilder.h
    M llvm/include/llvm/IR/InstrTypes.h
    M llvm/include/llvm/IR/Instruction.h
    M llvm/include/llvm/IR/Instructions.h
    M llvm/include/llvm/IR/Intrinsics.h
    M llvm/include/llvm/IR/Metadata.h
    M llvm/include/llvm/IR/ModuleSummaryIndex.h
    M llvm/include/llvm/IR/Operator.h
    M llvm/include/llvm/IR/VPIntrinsics.def
    M llvm/include/llvm/IR/ValueMap.h
    M llvm/lib/IR/AsmWriter.cpp
    M llvm/lib/IR/Attributes.cpp
    M llvm/lib/IR/AutoUpgrade.cpp
    M llvm/lib/IR/BasicBlock.cpp
    M llvm/lib/IR/ConstantFold.cpp
    M llvm/lib/IR/ConstantRange.cpp
    M llvm/lib/IR/Constants.cpp
    M llvm/lib/IR/ConstantsContext.h
    M llvm/lib/IR/DIBuilder.cpp
    M llvm/lib/IR/DataLayout.cpp
    M llvm/lib/IR/DebugInfo.cpp
    M llvm/lib/IR/DebugInfoMetadata.cpp
    M llvm/lib/IR/FPEnv.cpp
    M llvm/lib/IR/Function.cpp
    M llvm/lib/IR/Globals.cpp
    M llvm/lib/IR/IRBuilder.cpp
    M llvm/lib/IR/Instructions.cpp
    M llvm/lib/IR/IntrinsicInst.cpp
    M llvm/lib/IR/LLVMRemarkStreamer.cpp
    M llvm/lib/IR/MDBuilder.cpp
    M llvm/lib/IR/Metadata.cpp
    M llvm/lib/IR/Module.cpp
    M llvm/lib/IR/Operator.cpp
    M llvm/lib/IR/PseudoProbe.cpp
    M llvm/lib/IR/Type.cpp

  Log Message:
  -----------
  [IR] Use std::nullopt instead of None (NFC)

This patch mechanically replaces None with std::nullopt where the
compiler would warn if None were deprecated.  The intent is to reduce
the amount of manual work required in migrating from Optional to
std::optional.

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716