llvm-project

701148f0 - [CIR] Upstream initial support for CIR flattening (#130648)

[CIR] Upstream initial support for CIR flattening (#130648) The ClangIR CFG has to be flat before it can be lowered to LLVM IR. That is, there can be no nested regions and all blocks in a region must belong to the parent region. Currently only cir.scope operations violate these rules, so the initial implementation of the cir-flatten-cfg pass only has to transform scope operations.