[llvm] [SandboxVec][SeedCollector] Implement collection of seeds with different types (PR #146171)

[via llvm-commits]

vporpo wrote:

Apologies for the late reply.

> So, if I understand correctly, the way this works is by making SeedContainer::getKey use a nullptr for the Type part of the key, so seeds of all types will get bunched into the same key in the container, right? And then the rest of it is just plumbing to pass the AllowDiffTypes flag around as needed.

Correct. Since we are no longer separating the seeds according to type we are using nullptr as the key.

https://github.com/llvm/llvm-project/pull/146171