[llvm] [llvm-exegesis] Add loop-register snippet annotation (PR #82873)

[Clement Courbet via llvm-commits]

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@@ -509,22 +509,42 @@ void benchmarkMain() {
   }
 
   const auto Opcodes = getOpcodesOrDie(State);
+  std::vector<BenchmarkCode> Configurations;
+
+  unsigned LoopRegister =
+      State.getExegesisTarget().getDefaultLoopCounterRegister(
+          State.getTargetMachine().getTargetTriple());
+
+  if (Opcodes.empty()) {
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legrosbuffle wrote:

Why move this code ?

https://github.com/llvm/llvm-project/pull/82873