[llvm-branch-commits] [clang] [llvm] [RFC][LLVM][Clang] Add LLVM plugin hook for back-ends (PR #170846)

[Alexis Engelke via llvm-branch-commits]

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aengelke wrote:

We don't provide any API/ABI stability across LLVM versions, so APIVersion seems rather useless in practice anyway. If there's an APIVersion mismatch, the plugin is built against an incompatible LLVM version anyway...

Fixing this properly would require to stop returning the info struct by value, which would require changes for all users, which I wanted to avoid.

https://github.com/llvm/llvm-project/pull/170846