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annotate lib/Target/Mips/MipsAnalyzeImmediate.h @ 121:803732b1fca8

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LLVM 5.0
author kono
date Fri, 27 Oct 2017 17:07:41 +0900
parents 54457678186b
children c2174574ed3a
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1 //===- MipsAnalyzeImmediate.h - Analyze Immediates -------------*- C++ -*--===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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10 #ifndef LLVM_LIB_TARGET_MIPS_MIPSANALYZEIMMEDIATE_H
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11 #define LLVM_LIB_TARGET_MIPS_MIPSANALYZEIMMEDIATE_H
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13 #include "llvm/ADT/SmallVector.h"
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14 #include <cstdint>
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16 namespace llvm {
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17
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18 class MipsAnalyzeImmediate {
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19 public:
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20 struct Inst {
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21 unsigned Opc, ImmOpnd;
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22
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23 Inst(unsigned Opc, unsigned ImmOpnd);
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24 };
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25 using InstSeq = SmallVector<Inst, 7>;
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26
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27 /// Analyze - Get an instruction sequence to load immediate Imm. The last
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28 /// instruction in the sequence must be an ADDiu if LastInstrIsADDiu is
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29 /// true;
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30 const InstSeq &Analyze(uint64_t Imm, unsigned Size, bool LastInstrIsADDiu);
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31
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32 private:
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33 using InstSeqLs = SmallVector<InstSeq, 5>;
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34
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35 /// AddInstr - Add I to all instruction sequences in SeqLs.
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36 void AddInstr(InstSeqLs &SeqLs, const Inst &I);
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38 /// GetInstSeqLsADDiu - Get instruction sequences which end with an ADDiu to
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39 /// load immediate Imm
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40 void GetInstSeqLsADDiu(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
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41
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42 /// GetInstSeqLsORi - Get instrutcion sequences which end with an ORi to
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43 /// load immediate Imm
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44 void GetInstSeqLsORi(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
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45
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46 /// GetInstSeqLsSLL - Get instruction sequences which end with a SLL to
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47 /// load immediate Imm
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48 void GetInstSeqLsSLL(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
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49
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50 /// GetInstSeqLs - Get instruction sequences to load immediate Imm.
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51 void GetInstSeqLs(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
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52
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53 /// ReplaceADDiuSLLWithLUi - Replace an ADDiu & SLL pair with a LUi.
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54 void ReplaceADDiuSLLWithLUi(InstSeq &Seq);
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55
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56 /// GetShortestSeq - Find the shortest instruction sequence in SeqLs and
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57 /// return it in Insts.
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58 void GetShortestSeq(InstSeqLs &SeqLs, InstSeq &Insts);
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59
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60 unsigned Size;
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61 unsigned ADDiu, ORi, SLL, LUi;
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62 InstSeq Insts;
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63 };
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64
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65 } // end namespace llvm
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67 #endif // LLVM_LIB_TARGET_MIPS_MIPSANALYZEIMMEDIATE_H