[clang] [llvm] [clang] Integrate LLVMABI for function call ABI lowering (PR #194460)

[Nikita Popov via llvm-commits]

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@@ -877,6 +886,16 @@ class CodeGenModule : public CodeGenTypeCache {
   void maybeSetTrivialComdat(const Decl &D, llvm::GlobalObject &GO);
 
   const ABIInfo &getABIInfo();
+
+  /// Lazily build and return the LLVMABI library's TargetInfo for the current
+  /// target. Used by the experimental ABI lowering path
+  /// (-fexperimental-abi-lowering); only BPF is wired up today.
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nikic wrote:

```suggestion
  /// target.
```
Similar here, avoid this getting out of sync in the future.

https://github.com/llvm/llvm-project/pull/194460