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 #ifndef LLVM_LIB_TARGET_MIPS_MIPSANALYZEIMMEDIATE_H 10 #define LLVM_LIB_TARGET_MIPS_MIPSANALYZEIMMEDIATE_H 11 12 #include "llvm/ADT/SmallVector.h" 13 #include "llvm/Support/DataTypes.h" 14 15 namespace llvm { 16 17 class MipsAnalyzeImmediate { 18 public: 19 struct Inst { 20 unsigned Opc, ImmOpnd; 21 Inst(unsigned Opc, unsigned ImmOpnd); 22 }; 23 typedef SmallVector<Inst, 7 > InstSeq; 24 25 /// Analyze - Get an instruction sequence to load immediate Imm. The last 26 /// instruction in the sequence must be an ADDiu if LastInstrIsADDiu is 27 /// true; 28 const InstSeq &Analyze(uint64_t Imm, unsigned Size, bool LastInstrIsADDiu); 29 private: 30 typedef SmallVector<InstSeq, 5> InstSeqLs; 31 32 /// AddInstr - Add I to all instruction sequences in SeqLs. 33 void AddInstr(InstSeqLs &SeqLs, const Inst &I); 34 35 /// GetInstSeqLsADDiu - Get instruction sequences which end with an ADDiu to 36 /// load immediate Imm 37 void GetInstSeqLsADDiu(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs); 38 39 /// GetInstSeqLsORi - Get instrutcion sequences which end with an ORi to 40 /// load immediate Imm 41 void GetInstSeqLsORi(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs); 42 43 /// GetInstSeqLsSLL - Get instruction sequences which end with a SLL to 44 /// load immediate Imm 45 void GetInstSeqLsSLL(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs); 46 47 /// GetInstSeqLs - Get instruction sequences to load immediate Imm. 48 void GetInstSeqLs(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs); 49 50 /// ReplaceADDiuSLLWithLUi - Replace an ADDiu & SLL pair with a LUi. 51 void ReplaceADDiuSLLWithLUi(InstSeq &Seq); 52 53 /// GetShortestSeq - Find the shortest instruction sequence in SeqLs and 54 /// return it in Insts. 55 void GetShortestSeq(InstSeqLs &SeqLs, InstSeq &Insts); 56 57 unsigned Size; 58 unsigned ADDiu, ORi, SLL, LUi; 59 InstSeq Insts; 60 }; 61 } 62 63 #endif 64