trunk
Omit empty `observe:` blocks from formatted SemIR. (#7487)
Skip `ImplWitnessTable::elements_id` when generating fingerprints (#7629)
Implement thunking in terms of constant evaluation (#7332)
fixed a crash when lowering a ref return initialized by value expression (#7049)
Remove some uses of ReturnTypeInfo (#6577)
Use GetConstantValueInSpecific to get the impl's specific interface after deduction (#7584)