[llvm] [MCA] Enable customization of individual instructions (PR #155420)

[Roman Belenov via llvm-commits]

================
@@ -143,19 +146,27 @@ class LLVM_ABI InstrumentManager {
 protected:
   const MCSubtargetInfo &STI;
   const MCInstrInfo &MCII;
+  bool EnableDefaults;
+  std::unique_ptr<InstrumentManager> TargetIM;
----------------
r-belenov wrote:

Ok, now the customization in InstrumentManager class and can be reused.

https://github.com/llvm/llvm-project/pull/155420