1 //===- MipsAnalyzeImmediate.h - Analyze Immediates -------------*- C++ -*--===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef LLVM_LIB_TARGET_MIPS_MIPSANALYZEIMMEDIATE_H 11 #define LLVM_LIB_TARGET_MIPS_MIPSANALYZEIMMEDIATE_H 12 13 #include "llvm/ADT/SmallVector.h" 14 #include <cstdint> 15 16 namespace llvm { 17 18 class MipsAnalyzeImmediate { 19 public: 20 struct Inst { 21 unsigned Opc, ImmOpnd; 22 23 Inst(unsigned Opc, unsigned ImmOpnd); 24 }; 25 using InstSeq = SmallVector<Inst, 7>; 26 27 /// Analyze - Get an instruction sequence to load immediate Imm. The last 28 /// instruction in the sequence must be an ADDiu if LastInstrIsADDiu is 29 /// true; 30 const InstSeq &Analyze(uint64_t Imm, unsigned Size, bool LastInstrIsADDiu); 31 32 private: 33 using InstSeqLs = SmallVector<InstSeq, 5>; 34 35 /// AddInstr - Add I to all instruction sequences in SeqLs. 36 void AddInstr(InstSeqLs &SeqLs, const Inst &I); 37 38 /// GetInstSeqLsADDiu - Get instruction sequences which end with an ADDiu to 39 /// load immediate Imm 40 void GetInstSeqLsADDiu(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs); 41 42 /// GetInstSeqLsORi - Get instrutcion sequences which end with an ORi to 43 /// load immediate Imm 44 void GetInstSeqLsORi(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs); 45 46 /// GetInstSeqLsSLL - Get instruction sequences which end with a SLL to 47 /// load immediate Imm 48 void GetInstSeqLsSLL(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs); 49 50 /// GetInstSeqLs - Get instruction sequences to load immediate Imm. 51 void GetInstSeqLs(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs); 52 53 /// ReplaceADDiuSLLWithLUi - Replace an ADDiu & SLL pair with a LUi. 54 void ReplaceADDiuSLLWithLUi(InstSeq &Seq); 55 56 /// GetShortestSeq - Find the shortest instruction sequence in SeqLs and 57 /// return it in Insts. 58 void GetShortestSeq(InstSeqLs &SeqLs, InstSeq &Insts); 59 60 unsigned Size; 61 unsigned ADDiu, ORi, SLL, LUi; 62 InstSeq Insts; 63 }; 64 65 } // end namespace llvm 66 67 #endif // LLVM_LIB_TARGET_MIPS_MIPSANALYZEIMMEDIATE_H 68
