llvm-project

28fb9733 - [GlobalDCE][NFC] scan each vtable slot only once per function (#240541)

[GlobalDCE][NFC] scan each vtable slot only once per function (#240541) Extracted from https://github.com/llvm/llvm-project/pull/232495. A small optimization to how often `ScanVTableLoad` runs: it now runs only once per function. Especially after inlining, rust will regularly load the same function pointer from a vtable multiple times in the same function. Only the first load is relevant for liveness.