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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 | //===----------------------------------------------------------------------===// | |
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9 | #ifndef LLVM_LIB_TARGET_MIPS_MIPSANALYZEIMMEDIATE_H |
10 | #define LLVM_LIB_TARGET_MIPS_MIPSANALYZEIMMEDIATE_H | |
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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 | ||
1a4d82fc | 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 |
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 | ||
1a4d82fc | 35 | /// GetInstSeqLsADDiu - Get instruction sequences which end with an ADDiu to |
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36 | /// load immediate Imm |
37 | void GetInstSeqLsADDiu(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs); | |
38 | ||
1a4d82fc | 39 | /// GetInstSeqLsORi - Get instrutcion sequences which end with an ORi to |
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40 | /// load immediate Imm |
41 | void GetInstSeqLsORi(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs); | |
42 | ||
1a4d82fc | 43 | /// GetInstSeqLsSLL - Get instruction sequences which end with a SLL to |
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44 | /// load immediate Imm |
45 | void GetInstSeqLsSLL(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs); | |
46 | ||
1a4d82fc | 47 | /// GetInstSeqLs - Get instruction sequences to load immediate Imm. |
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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 |