[all-commits] [llvm/llvm-project] ac47db: [Attributes] Return Optional from getAllocSizeArgs...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ac47db6acad29b6e077593430338be69d81cb6c0
      https://github.com/llvm/llvm-project/commit/ac47db6acad29b6e077593430338be69d81cb6c0
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2022-10-11 (Tue, 11 Oct 2022)

  Changed paths:
    M llvm/include/llvm/IR/Attributes.h
    M llvm/lib/IR/AttributeImpl.h
    M llvm/lib/IR/Attributes.cpp
    M llvm/lib/IR/Verifier.cpp
    M llvm/lib/Target/WebAssembly/WebAssemblyLowerEmscriptenEHSjLj.cpp

  Log Message:
  -----------
  [Attributes] Return Optional from getAllocSizeArgs() (NFC)

As suggested on D135572, return Optional<> from getAllocSizeArgs()
rather than the peculiar pair(0, 0) sentinel.

The method on Attribute itself does not return Optional, because
the attribute must exist in that case.