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annotate lib/Target/Mips/MipsAnalyzeImmediate.h @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children 54457678186b
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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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9 #ifndef MIPS_ANALYZE_IMMEDIATE_H
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10 #define MIPS_ANALYZE_IMMEDIATE_H
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11
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12 #include "llvm/ADT/SmallVector.h"
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13 #include "llvm/Support/DataTypes.h"
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14
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15 namespace llvm {
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16
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17 class MipsAnalyzeImmediate {
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18 public:
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19 struct Inst {
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20 unsigned Opc, ImmOpnd;
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21 Inst(unsigned Opc, unsigned ImmOpnd);
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22 };
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23 typedef SmallVector<Inst, 7 > InstSeq;
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24
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25 /// Analyze - Get an instruction sequence to load immediate Imm. The last
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26 /// instruction in the sequence must be an ADDiu if LastInstrIsADDiu is
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27 /// true;
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28 const InstSeq &Analyze(uint64_t Imm, unsigned Size, bool LastInstrIsADDiu);
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29 private:
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30 typedef SmallVector<InstSeq, 5> InstSeqLs;
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31
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32 /// AddInstr - Add I to all instruction sequences in SeqLs.
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33 void AddInstr(InstSeqLs &SeqLs, const Inst &I);
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34
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35 /// GetInstSeqLsADDiu - Get instruction sequences which end with an ADDiu to
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36 /// load immediate Imm
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37 void GetInstSeqLsADDiu(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
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38
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39 /// GetInstSeqLsORi - Get instrutcion sequences which end with an ORi to
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40 /// load immediate Imm
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41 void GetInstSeqLsORi(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
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42
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43 /// GetInstSeqLsSLL - Get instruction sequences which end with a SLL to
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44 /// load immediate Imm
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45 void GetInstSeqLsSLL(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
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46
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47 /// GetInstSeqLs - Get instruction sequences to load immediate Imm.
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48 void GetInstSeqLs(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
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49
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50 /// ReplaceADDiuSLLWithLUi - Replace an ADDiu & SLL pair with a LUi.
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51 void ReplaceADDiuSLLWithLUi(InstSeq &Seq);
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52
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53 /// GetShortestSeq - Find the shortest instruction sequence in SeqLs and
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54 /// return it in Insts.
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55 void GetShortestSeq(InstSeqLs &SeqLs, InstSeq &Insts);
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56
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57 unsigned Size;
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58 unsigned ADDiu, ORi, SLL, LUi;
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59 InstSeq Insts;
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60 };
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61 }
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62
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63 #endif