[llvm] [AMDGPU][NFC] Move InstCounterType and Waitcnt to AMDGPUWaitcntUtils.h (PR #187823)

[Matt Arsenault via llvm-commits]

================
@@ -69,6 +70,49 @@ static cl::opt<bool> ExpertSchedulingModeFlag(
     cl::desc("Enable expert scheduling mode 2 for all functions (GFX12+ only)"),
     cl::init(false), cl::Hidden);
 
+namespace llvm {
+
+namespace AMDGPU {
+
+iota_range<InstCounterType> inst_counter_types(InstCounterType MaxCounter) {
+  return enum_seq(LOAD_CNT, MaxCounter);
+}
+
+StringLiteral getInstCounterName(InstCounterType T) {
+  switch (T) {
+  case LOAD_CNT:
+    return "LOAD_CNT";
+  case DS_CNT:
+    return "DS_CNT";
+  case EXP_CNT:
+    return "EXP_CNT";
+  case STORE_CNT:
+    return "STORE_CNT";
+  case SAMPLE_CNT:
+    return "SAMPLE_CNT";
+  case BVH_CNT:
+    return "BVH_CNT";
+  case KM_CNT:
+    return "KM_CNT";
+  case X_CNT:
+    return "X_CNT";
+  case VA_VDST:
+    return "VA_VDST";
+  case VM_VSRC:
+    return "VM_VSRC";
+  default:
+    return "Unknown T";
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arsenm wrote:

To make all the compilers happy you have to put the unreachable after the switch 

https://github.com/llvm/llvm-project/pull/187823