[all-commits] [llvm/llvm-project] 206b5a: AtomicExpand: Allow incrementally legalizing atomi...

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 206b5aff44a95754f6dd7a5696efa024e983ac59
      https://github.com/llvm/llvm-project/commit/206b5aff44a95754f6dd7a5696efa024e983ac59
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2024-08-30 (Fri, 30 Aug 2024)

  Changed paths:
    M llvm/lib/CodeGen/AtomicExpandPass.cpp
    M llvm/test/CodeGen/AArch64/atomicrmw-fadd.ll
    M llvm/test/CodeGen/AArch64/atomicrmw-fmax.ll
    M llvm/test/CodeGen/AArch64/atomicrmw-fmin.ll
    M llvm/test/CodeGen/AArch64/atomicrmw-fsub.ll

  Log Message:
  -----------
  AtomicExpand: Allow incrementally legalizing atomicrmw (#103371)

If a lowering changed control flow, resume the legalization
loop at the first newly inserted block.

This will allow incrementally legalizing atomicrmw and cmpxchg.

The AArch64 test might be a bugfix. Previously it would lower
the vector FP case as a cmpxchg loop, but cmpxchgs get lowered
but previously weren't. Maybe it shouldn't be reporting cmpxchg
for the expand type in the first place though.



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