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A comment on Rust's unsafe pointer types need an overhaul. Parent comment

Re:Rust's unsafe pointer types need an overhaul by kaba0 on Sunday March 20, 2022 @04:13AM (#30741008)
I’m way out of my depth here, but as far as I know flags have a non-trivial interaction with superscalar execution.

Not sure how accurate it is, but I can imagine it being similar to parallelizing a program with independent units of works vs trying to do the same for threads that depend on each other’s output.

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Re:Rust's unsafe pointer types need an overhaul by titzer on Sunday March 20, 2022 @12:12PM (#30743887)
Flags are treated as just another kind of dependency in the register renaming phase, though it's a lot hairier because they probably need to be tracked on an individual (per-bit) basis.

As a sibling commenter noted, a conditional call is basically just a macro for a (negated) conditional branch jump over a call instruction, but with a different prediction.

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