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