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

[Min-Yih Hsu via llvm-commits]

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@@ -42,8 +43,45 @@ CustomBehaviour::getEndViews(llvm::MCInstPrinter &IP,
   return std::vector<std::unique_ptr<View>>();
 }
 
+const llvm::StringRef LatencyInstrument::DESC_NAME = "LATENCY";
+
+bool InstrumentManager::supportsInstrumentType(StringRef Type) const {
+  return EnableInstruments && Type == LatencyInstrument::DESC_NAME;
+}
+
+bool InstrumentManager::canCustomize(
+    const llvm::SmallVector<Instrument *> &IVec) const {
+  for (const auto I : IVec) {
+    if (I->getDesc() == LatencyInstrument::DESC_NAME) {
+      auto LatInst = static_cast<LatencyInstrument *>(I);
+      return LatInst->hasValue();
+    }
+  }
+  return false;
+}
+
+void InstrumentManager::customize(const llvm::SmallVector<Instrument *> &IVec,
+                                  InstrDesc &ID) const {
+  for (const auto I : IVec) {
+    if (I->getDesc() == LatencyInstrument::DESC_NAME) {
+      auto LatInst = static_cast<LatencyInstrument *>(I);
+      if (LatInst->hasValue()) {
+        auto Latency = LatInst->getLatency();
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mshockwave wrote:

please spell out the type

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