Complete Lab2 IR generation and document process

src/ir/Context.cpp

@@ -15,10 +15,18 @@ ConstantInt* Context::GetConstInt(int v) {
   return inserted->second.get();
 }
 
+ConstantFloat* Context::GetConstFloat(float v) {
+  auto it = const_floats_.find(v);
+  if (it != const_floats_.end()) return it->second.get();
+  auto inserted =
+      const_floats_
+          .emplace(v, std::make_unique<ConstantFloat>(Type::GetFloatType(), v))
+          .first;
+  return inserted->second.get();
+}
+
 std::string Context::NextTemp() {
-  std::ostringstream oss;
-  oss << "%" << ++temp_index_;
-  return oss.str();
+  return "t" + std::to_string(++temp_index_);
 }
 
 }  // namespace ir