[all-commits] [llvm/llvm-project] 7f5c34: [IR] Replace blockaddress refcount with single fla...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7f5c34bc5e54e0fb149275d9ee6805e9e6a7a3ea
      https://github.com/llvm/llvm-project/commit/7f5c34bc5e54e0fb149275d9ee6805e9e6a7a3ea
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2025-05-02 (Fri, 02 May 2025)

  Changed paths:
    M llvm/include/llvm/IR/BasicBlock.h
    M llvm/lib/IR/BasicBlock.cpp
    M llvm/lib/IR/Constants.cpp

  Log Message:
  -----------
  [IR] Replace blockaddress refcount with single flag (#138239)

BasicBlock currently has a blockaddress refcount. However,
blockaddresses are uniqued, which means that there can only be a single
blockaddress for a given BasicBlock. Prior to #137958 there were some
edge case exceptions to this, but now it always holds. As such, replace
the refcount with a single flag.

As we're now just tracking two bits, I've dropped the BasicBlockBits
structure, as I found it more annoying than useful (esp with the weird
AIX workarounds). Instead handle the subclass data the same way we do in
Operators.



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