I thought the Pentium Pro _was_ a 686?
Wikipedia seems to correlate: https://en.wikipedia.org/wiki/Pentium_Pro, as do discussions on CMOV: https://stackoverflow.com/a/4429563
Wikipedia seems to correlate: https://en.wikipedia.org/wiki/Pentium_Pro, as do discussions on CMOV: https://stackoverflow.com/a/4429563
Edit: I see from the sister post that it is actually llvm and not rust, so I'm half barking up the wrong tree. But somehow this is not an issue with gcc and friends.