[llvm] [MIR2Vec] Add embedder for machine instructions (PR #162161)

[S. VenkataKeerthy via llvm-commits]

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@@ -267,7 +297,104 @@ MIR2VecVocabLegacyAnalysis::getMIR2VecVocabulary(const Module &M) {
 }
 
 //===----------------------------------------------------------------------===//
-// Printer Passes Implementation
+// MIREmbedder and its subclasses
+//===----------------------------------------------------------------------===//
+
+MIREmbedder::MIREmbedder(const MachineFunction &MF, const MIRVocabulary &Vocab)
+    : MF(MF), Vocab(Vocab), Dimension(Vocab.getDimension()),
+      OpcWeight(::OpcWeight), MFuncVector(Embedding(Dimension)) {}
+
+std::unique_ptr<MIREmbedder> MIREmbedder::create(MIR2VecKind Mode,
+                                                 const MachineFunction &MF,
+                                                 const MIRVocabulary &Vocab) {
+  switch (Mode) {
+  case MIR2VecKind::Symbolic:
+    return std::make_unique<SymbolicMIREmbedder>(MF, Vocab);
+  }
+  return nullptr;
+}
+
+const MachineInstEmbeddingsMap &MIREmbedder::getMInstVecMap() const {
+  if (MInstVecMap.empty())
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svkeerthy wrote:

Refactored the code to remove caching.

https://github.com/llvm/llvm-project/pull/162161