llvm-project

ebaf1744 - [clang][deps] Expand `DependencyActionController` APIs (#184917)

[clang][deps] Expand `DependencyActionController` APIs (#184917) This PR upstreams a piece of infrastructure from Swift's LLVM fork. This allows controlling behavior of the dependency scanner, e.g. modifying the primary compiler invocation and modifying compiler instances (the primary one and for imported modules). This will be used to implement modules support in the CAS-based compilation caching mode.