They might not have "provided LLVM with changes for the compilers they are selling" but they have provided TONS AND TONS of changes and fixes and new features for the core LLVM infrastructure.
I could not care less about having the changes to their compilers, and I would even dislike it if LLVM's license required them to do so if that meant they wouldn't touch LLVM in the first place -- in which case we wouldn't get all these core LLVM improvements.
I could not care less about having the changes to their compilers, and I would even dislike it if LLVM's license required them to do so if that meant they wouldn't touch LLVM in the first place -- in which case we wouldn't get all these core LLVM improvements.