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, 30 CodeGenOpt::Level OptLevel); 31 FunctionPass *createAVRExpandPseudoPass(); 32 FunctionPass *createAVRFrameAnalyzerPass(); 33 FunctionPass *createAVRBranchSelectionPass(); 34 35 void initializeAVRDAGToDAGISelPass(PassRegistry &); 36 void initializeAVRExpandPseudoPass(PassRegistry &); 37 void initializeAVRShiftExpandPass(PassRegistry &); 38 39 /// Contains the AVR backend. 40 namespace AVR { 41 42 /// An integer that identifies all of the supported AVR address spaces. 43 enum 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. 55 template <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 66 template <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 75 inline 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 86 inline 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