llvm-project

eeffaf11 - [AllocToken] Refactor stateless token calculation into Support (#163633)

[AllocToken] Refactor stateless token calculation into Support (#163633) Refactor the stateless (hash-based) token calculation logic out of the `AllocToken` pass and into `llvm/Support/AllocToken.h`. This helps with making the token calculation logic available to other parts of the codebase, which will be necessary for frontend implementation of `__builtin_infer_alloc_token` to perform constexpr evaluation. The `AllocTokenMode` enum and a new `AllocTokenMetadata` struct are moved into a shared header. The `getAllocTokenHash()` function now provides the source of truth for calculating token IDs for `TypeHash` and `TypeHashPointerSplit` modes.