Really Add .cpp

Author: tomtor

llvm/lib/Target/AVR/AVRTargetTransformInfo.cpp

@@ -0,0 +1,27 @@
+//===-- AVRTargetTransformInfo.cpp - AVR specific TTI ---------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "AVRTargetTransformInfo.h"
+#include "llvm/CodeGen/CostTable.h"
+
+using namespace llvm;
+
+bool AVRTTIImpl::isLSRCostLess(const TargetTransformInfo::LSRCost &C1,
+                                 const TargetTransformInfo::LSRCost &C2) const {
+  // AVR specific here are "instruction number 1st priority".
+  // If we need to emit adds inside the loop to add up base registers, then
+  // we need at least one extra temporary register.
+  unsigned C1NumRegs = C1.NumRegs + (C1.NumBaseAdds != 0);
+  unsigned C2NumRegs = C2.NumRegs + (C2.NumBaseAdds != 0);
+  return std::tie(C1.Insns, C1NumRegs, C1.AddRecCost,
+                  C1.NumIVMuls, C1.NumBaseAdds,
+                  C1.ScaleCost, C1.ImmCost, C1.SetupCost) <
+         std::tie(C2.Insns, C2NumRegs, C2.AddRecCost,
+                  C2.NumIVMuls, C2.NumBaseAdds,
+                  C2.ScaleCost, C2.ImmCost, C2.SetupCost);
+}