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1//===- MipsAnalyzeImmediate.h - Analyze Immediates -------------*- C++ -*--===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_LIB_TARGET_MIPS_MIPSANALYZEIMMEDIATE_H10#define LLVM_LIB_TARGET_MIPS_MIPSANALYZEIMMEDIATE_H11 12#include "llvm/ADT/SmallVector.h"13#include <cstdint>14 15namespace llvm {16 17 class MipsAnalyzeImmediate {18 public:19 struct Inst {20 unsigned Opc, ImmOpnd;21 22 Inst(unsigned Opc, unsigned ImmOpnd);23 };24 using InstSeq = SmallVector<Inst, 7>;25 26 /// Analyze - Get an instruction sequence to load immediate Imm. The last27 /// instruction in the sequence must be an ADDiu if LastInstrIsADDiu is28 /// true;29 const InstSeq &Analyze(uint64_t Imm, unsigned Size, bool LastInstrIsADDiu);30 31 private:32 using InstSeqLs = SmallVector<InstSeq, 5>;33 34 /// AddInstr - Add I to all instruction sequences in SeqLs.35 void AddInstr(InstSeqLs &SeqLs, const Inst &I);36 37 /// GetInstSeqLsADDiu - Get instruction sequences which end with an ADDiu to38 /// load immediate Imm39 void GetInstSeqLsADDiu(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);40 41 /// GetInstSeqLsORi - Get instrutcion sequences which end with an ORi to42 /// load immediate Imm43 void GetInstSeqLsORi(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);44 45 /// GetInstSeqLsSLL - Get instruction sequences which end with a SLL to46 /// load immediate Imm47 void GetInstSeqLsSLL(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);48 49 /// GetInstSeqLs - Get instruction sequences to load immediate Imm.50 void GetInstSeqLs(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);51 52 /// ReplaceADDiuSLLWithLUi - Replace an ADDiu & SLL pair with a LUi.53 void ReplaceADDiuSLLWithLUi(InstSeq &Seq);54 55 /// GetShortestSeq - Find the shortest instruction sequence in SeqLs and56 /// return it in Insts.57 void GetShortestSeq(InstSeqLs &SeqLs, InstSeq &Insts);58 59 unsigned Size;60 unsigned ADDiu, ORi, SLL, LUi;61 InstSeq Insts;62 };63 64} // end namespace llvm65 66#endif // LLVM_LIB_TARGET_MIPS_MIPSANALYZEIMMEDIATE_H67