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1 | //==-- ARMTargetFrameLowering.h - Define frame lowering for ARM --*- 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 | // | |
10 | // | |
11 | // | |
12 | //===----------------------------------------------------------------------===// | |
13 | ||
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14 | #ifndef LLVM_LIB_TARGET_ARM_ARMFRAMELOWERING_H |
15 | #define LLVM_LIB_TARGET_ARM_ARMFRAMELOWERING_H | |
223e47cc | 16 | |
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17 | #include "llvm/Target/TargetFrameLowering.h" |
18 | ||
19 | namespace llvm { | |
20 | class ARMSubtarget; | |
21 | ||
22 | class ARMFrameLowering : public TargetFrameLowering { | |
23 | protected: | |
24 | const ARMSubtarget &STI; | |
25 | ||
26 | public: | |
1a4d82fc | 27 | explicit ARMFrameLowering(const ARMSubtarget &sti); |
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28 | |
29 | /// emitProlog/emitEpilog - These methods insert prolog and epilog code into | |
30 | /// the function. | |
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31 | void emitPrologue(MachineFunction &MF) const override; |
32 | void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; | |
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33 | |
34 | bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, | |
35 | MachineBasicBlock::iterator MI, | |
36 | const std::vector<CalleeSavedInfo> &CSI, | |
1a4d82fc | 37 | const TargetRegisterInfo *TRI) const override; |
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38 | |
39 | bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, | |
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40 | MachineBasicBlock::iterator MI, |
41 | const std::vector<CalleeSavedInfo> &CSI, | |
42 | const TargetRegisterInfo *TRI) const override; | |
223e47cc | 43 | |
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44 | bool hasFP(const MachineFunction &MF) const override; |
45 | bool hasReservedCallFrame(const MachineFunction &MF) const override; | |
46 | bool canSimplifyCallFramePseudos(const MachineFunction &MF) const override; | |
223e47cc | 47 | int getFrameIndexReference(const MachineFunction &MF, int FI, |
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48 | unsigned &FrameReg) const override; |
49 | int ResolveFrameIndexReference(const MachineFunction &MF, int FI, | |
223e47cc | 50 | unsigned &FrameReg, int SPAdj) const; |
1a4d82fc | 51 | int getFrameIndexOffset(const MachineFunction &MF, int FI) const override; |
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52 | |
53 | void processFunctionBeforeCalleeSavedScan(MachineFunction &MF, | |
1a4d82fc | 54 | RegScavenger *RS) const override; |
223e47cc | 55 | |
1a4d82fc | 56 | void adjustForSegmentedStacks(MachineFunction &MF) const override; |
970d7e83 | 57 | |
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58 | private: |
59 | void emitPushInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, | |
60 | const std::vector<CalleeSavedInfo> &CSI, unsigned StmOpc, | |
61 | unsigned StrOpc, bool NoGap, | |
62 | bool(*Func)(unsigned, bool), unsigned NumAlignedDPRCS2Regs, | |
63 | unsigned MIFlags = 0) const; | |
64 | void emitPopInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, | |
65 | const std::vector<CalleeSavedInfo> &CSI, unsigned LdmOpc, | |
66 | unsigned LdrOpc, bool isVarArg, bool NoGap, | |
67 | bool(*Func)(unsigned, bool), | |
68 | unsigned NumAlignedDPRCS2Regs) const; | |
970d7e83 | 69 | |
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70 | void |
71 | eliminateCallFramePseudoInstr(MachineFunction &MF, | |
72 | MachineBasicBlock &MBB, | |
73 | MachineBasicBlock::iterator MI) const override; | |
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74 | }; |
75 | ||
76 | } // End llvm namespace | |
77 | ||
78 | #endif |