[clang] [llvm] [IR] Memory effects for floating-point operations (PR #221754)

[Serge Pavlov via llvm-commits]

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spavloff wrote:

I think you are right and extending semantics of `onlyAccessesInaccessibleMem` could reduce misunderstanding. The code is changed accordingly.

https://github.com/llvm/llvm-project/pull/221754