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-exception
6//
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, then
17 // 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(args: C1.Insns, args&: C1NumRegs, args: C1.AddRecCost, args: C1.NumIVMuls,
21 args: C1.NumBaseAdds, args: C1.ScaleCost, args: C1.ImmCost, args: C1.SetupCost) <
22 std::tie(args: C2.Insns, args&: C2NumRegs, args: C2.AddRecCost, args: C2.NumIVMuls,
23 args: C2.NumBaseAdds, args: C2.ScaleCost, args: C2.ImmCost, args: C2.SetupCost);
24}
25