Module tracing_core::stdlib::hint
1.27.0 · source · Expand description
Hints to compiler that affects how code should be emitted or optimized. Hints may be compile time or runtime.
Functions§
- Makes a soundness promise to the compiler that
cond
holds. - An identity function that hints to the compiler to be maximally pessimistic about what
black_box
could do. - Emits a machine instruction to signal the processor that it is running in a busy-wait spin-loop (“spin lock”).
- Informs the compiler that the site which is calling this function is not reachable, possibly enabling further optimizations.
- must_
use Experimental An identity function that causes anunused_must_use
warning to be triggered if the given value is not used (returned, stored in a variable, etc) by the caller.