1//===-- AVR.h - Top-level interface for AVR representation ------*- C++ -*-===//
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// This file contains the entry points for global functions defined in the LLVM
10// AVR back-end.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_AVR_H
15#define LLVM_AVR_H
16
17#include "llvm/CodeGen/SelectionDAGNodes.h"
18#include "llvm/Pass.h"
19#include "llvm/PassRegistry.h"
20#include "llvm/Target/TargetMachine.h"
21
22namespace llvm {
23
24class AVRTargetMachine;
25class FunctionPass;
26class PassRegistry;
27
28Pass *createAVRShiftExpandPass();
29FunctionPass *createAVRISelDag(AVRTargetMachine &TM, CodeGenOptLevel OptLevel);
30FunctionPass *createAVRExpandPseudoPass();
31FunctionPass *createAVRFrameAnalyzerPass();
32FunctionPass *createAVRBranchSelectionPass();
33
34void initializeAVRAsmPrinterPass(PassRegistry &);
35void initializeAVRDAGToDAGISelLegacyPass(PassRegistry &);
36void initializeAVRExpandPseudoPass(PassRegistry &);
37void initializeAVRShiftExpandPass(PassRegistry &);
38
39/// Contains the AVR backend.
40namespace AVR {
41
42/// An integer that identifies all of the supported AVR address spaces.
43enum AddressSpace {
44 DataMemory,
45 ProgramMemory,
46 ProgramMemory1,
47 ProgramMemory2,
48 ProgramMemory3,
49 ProgramMemory4,
50 ProgramMemory5,
51 NumAddrSpaces,
52};
53
54/// Checks if a given type is a pointer to program memory.
55template <typename T> bool isProgramMemoryAddress(T *V) {
56 auto *PT = cast<PointerType>(V->getType());
57 assert(PT != nullptr && "unexpected MemSDNode");
58 return PT->getAddressSpace() == ProgramMemory ||
59 PT->getAddressSpace() == ProgramMemory1 ||
60 PT->getAddressSpace() == ProgramMemory2 ||
61 PT->getAddressSpace() == ProgramMemory3 ||
62 PT->getAddressSpace() == ProgramMemory4 ||
63 PT->getAddressSpace() == ProgramMemory5;
64}
65
66template <typename T> AddressSpace getAddressSpace(T *V) {
67 auto *PT = cast<PointerType>(V->getType());
68 assert(PT != nullptr && "unexpected MemSDNode");
69 unsigned AS = PT->getAddressSpace();
70 if (AS < NumAddrSpaces)
71 return static_cast<AddressSpace>(AS);
72 return NumAddrSpaces;
73}
74
75inline bool isProgramMemoryAccess(MemSDNode const *N) {
76 auto *V = N->getMemOperand()->getValue();
77 if (V != nullptr && isProgramMemoryAddress(V))
78 return true;
79 return false;
80}
81
82// Get the index of the program memory bank.
83// -1: not program memory
84// 0: ordinary program memory
85// 1~5: extended program memory
86inline int getProgramMemoryBank(MemSDNode const *N) {
87 auto *V = N->getMemOperand()->getValue();
88 if (V == nullptr || !isProgramMemoryAddress(V))
89 return -1;
90 AddressSpace AS = getAddressSpace(V);
91 assert(ProgramMemory <= AS && AS <= ProgramMemory5);
92 return static_cast<int>(AS - ProgramMemory);
93}
94
95} // end of namespace AVR
96
97} // end namespace llvm
98
99#endif // LLVM_AVR_H
100