[llvm-dev] cmpxchg on floats

Alex Zinenko via llvm-dev llvm-dev at lists.llvm.org
Thu Aug 13 06:35:03 PDT 2020

Hi LLVM-dev,

when working on MLIR-to-LLVM-IR conversion, I noticed that it is possible
to programmatically construct a cmpxchg instruction operating on floats (or
actually any type since there is no assertion on pointer element type here
but LangRef specifies that only integers and pointers are accepted (
https://llvm.org/docs/LangRef.html#cmpxchg-instruction). Does somebody rely
on other types being accepted in cmpxchg or should we add an assertion for
the element type to match the LangRef?

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