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