[llvm] [IR2Vec] Exposing Embedding as an ADT wrapped around std::vector<double> (PR #143197)

[S. VenkataKeerthy via llvm-commits]

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@@ -55,6 +55,40 @@ static cl::opt<float> ArgWeight("ir2vec-arg-weight", cl::Optional,
 
 AnalysisKey IR2VecVocabAnalysis::Key;
 
+// ==----------------------------------------------------------------------===//
+// Embedding
+//===----------------------------------------------------------------------===//
+
+Embedding &Embedding::operator+=(const Embedding &RHS) {
+  assert(this->size() == RHS.size() && "Vectors must have the same dimension");
+  std::transform(this->begin(), this->end(), RHS.begin(), this->begin(),
+                 std::plus<double>());
+  return *this;
+}
+
+Embedding &Embedding::operator-=(const Embedding &RHS) {
+  assert(this->size() == RHS.size() && "Vectors must have the same dimension");
+  std::transform(this->begin(), this->end(), RHS.begin(), this->begin(),
+                 std::minus<double>());
+  return *this;
+}
+
+void Embedding::scaleAndAdd(const Embedding &Src, float Factor) {
+  assert(this->size() == Src.size() && "Vectors must have the same dimension");
+  for (size_t i = 0; i < this->size(); ++i) {
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svkeerthy wrote:

Yeah, thanks! I just thought `I` is a bit confusing (with `Instruction`), and noticed other codes using `i` and `j` for iterators. Changed it to `Itr`.

https://github.com/llvm/llvm-project/pull/143197