[LLVMdev] Best way for JIT to query whether llvm.fma.* is fast?

[Robison, Arch]

For the Julia language JIT, we'd like be able to tell whether the llvm.fma.* intrinsic has hardware support.  What's the best way to  query LLVM (JIT) for this information?

The information would be used in situations where the user wants to use different algorithms depending on whether FMA hardware is present or not.

- Arch D. Robison

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