25 lines · cpp
1//===-- AVRTargetTransformInfo.cpp - AVR specific TTI ---------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "AVRTargetTransformInfo.h"10 11using namespace llvm;12 13bool AVRTTIImpl::isLSRCostLess(const TargetTransformInfo::LSRCost &C1,14 const TargetTransformInfo::LSRCost &C2) const {15 // AVR specific here are "instruction number 1st priority".16 // If we need to emit adds inside the loop to add up base registers, then17 // we need at least one extra temporary register.18 unsigned C1NumRegs = C1.NumRegs + (C1.NumBaseAdds != 0);19 unsigned C2NumRegs = C2.NumRegs + (C2.NumBaseAdds != 0);20 return std::tie(C1.Insns, C1NumRegs, C1.AddRecCost, C1.NumIVMuls,21 C1.NumBaseAdds, C1.ScaleCost, C1.ImmCost, C1.SetupCost) <22 std::tie(C2.Insns, C2NumRegs, C2.AddRecCost, C2.NumIVMuls,23 C2.NumBaseAdds, C2.ScaleCost, C2.ImmCost, C2.SetupCost);24}25