LLVM  10.0.0svn
ARCFrameLowering.h
Go to the documentation of this file.
1 //===- ARCFrameLowering.h - Define frame lowering for ARC -------*- 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-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This class implements the ARC specific frame lowering.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_ARC_ARCFRAMELOWERING_H
14 #define LLVM_LIB_TARGET_ARC_ARCFRAMELOWERING_H
15 
16 #include "ARC.h"
20 
21 namespace llvm {
22 
23 class MachineFunction;
24 class ARCSubtarget;
25 class ARCInstrInfo;
26 
28 public:
31  ST(st) {}
32 
33  /// Insert Prologue into the function.
34  void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
35 
36  /// Insert Epilogue into the function.
37  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
38 
39  /// Add explicit callee save registers.
40  void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
41  RegScavenger *RS) const override;
42 
45  const std::vector<CalleeSavedInfo> &CSI,
46  const TargetRegisterInfo *TRI) const override;
47 
48  bool
51  std::vector<CalleeSavedInfo> &CSI,
52  const TargetRegisterInfo *TRI) const override;
53 
55  RegScavenger *RS) const override;
56 
57  bool hasFP(const MachineFunction &MF) const override;
58 
61  MachineBasicBlock::iterator I) const override;
62 
65  std::vector<llvm::CalleeSavedInfo> &) const override;
66 
67 private:
68  void adjustStackToMatchRecords(MachineBasicBlock &MBB,
70  bool allocate) const;
71 
72  const ARCSubtarget &ST;
73 };
74 
75 } // end namespace llvm
76 
77 #endif // LLVM_LIB_TARGET_ARC_ARCFRAMELOWERING_H
This class represents lattice values for constants.
Definition: AllocatorList.h:23
ARCFrameLowering(const ARCSubtarget &st)
void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override
Insert Prologue into the function.
unsigned const TargetRegisterInfo * TRI
void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS) const override
Add explicit callee save registers.
MachineBasicBlock::iterator eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator I) const override
This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy p...
bool assignCalleeSavedSpillSlots(llvm::MachineFunction &, const llvm::TargetRegisterInfo *, std::vector< llvm::CalleeSavedInfo > &) const override
assignCalleeSavedSpillSlots - Allows target to override spill slot assignment logic.
bool hasFP(const MachineFunction &MF) const override
hasFP - Return true if the specified function should have a dedicated frame pointer register...
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
This struct is a compact representation of a valid (non-zero power of two) alignment.
Definition: Alignment.h:40
void processFunctionBeforeFrameFinalized(MachineFunction &MF, RegScavenger *RS) const override
processFunctionBeforeFrameFinalized - This method is called immediately before the specified function...
bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, std::vector< CalleeSavedInfo > &CSI, const TargetRegisterInfo *TRI) const override
restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns...
Information about stack frame layout on the target.
bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const std::vector< CalleeSavedInfo > &CSI, const TargetRegisterInfo *TRI) const override
spillCalleeSavedRegisters - Issues instruction(s) to spill all callee saved registers and returns tru...
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override
Insert Epilogue into the function.
#define I(x, y, z)
Definition: MD5.cpp:58
IRTranslator LLVM IR MI