LCOV - code coverage report
Current view: top level - lib/Target/ARM - ARMFrameLowering.h (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 3 3 100.0 %
Date: 2017-09-14 15:23:50 Functions: 2 3 66.7 %
Legend: Lines: hit not hit

          Line data    Source code
       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             : 
      14             : #ifndef LLVM_LIB_TARGET_ARM_ARMFRAMELOWERING_H
      15             : #define LLVM_LIB_TARGET_ARM_ARMFRAMELOWERING_H
      16             : 
      17             : #include "llvm/Target/TargetFrameLowering.h"
      18             : 
      19             : namespace llvm {
      20             :   class ARMSubtarget;
      21             : 
      22        4445 : class ARMFrameLowering : public TargetFrameLowering {
      23             : protected:
      24             :   const ARMSubtarget &STI;
      25             : 
      26             : public:
      27             :   explicit ARMFrameLowering(const ARMSubtarget &sti);
      28             : 
      29             :   /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
      30             :   /// the function.
      31             :   void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
      32             :   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
      33             : 
      34             :   bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
      35             :                                  MachineBasicBlock::iterator MI,
      36             :                                  const std::vector<CalleeSavedInfo> &CSI,
      37             :                                  const TargetRegisterInfo *TRI) const override;
      38             : 
      39             :   bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
      40             :                                   MachineBasicBlock::iterator MI,
      41             :                                   std::vector<CalleeSavedInfo> &CSI,
      42             :                                   const TargetRegisterInfo *TRI) const override;
      43             : 
      44             :   bool noFramePointerElim(const MachineFunction &MF) const override;
      45             : 
      46             :   bool hasFP(const MachineFunction &MF) const override;
      47             :   bool hasReservedCallFrame(const MachineFunction &MF) const override;
      48             :   bool canSimplifyCallFramePseudos(const MachineFunction &MF) const override;
      49             :   int getFrameIndexReference(const MachineFunction &MF, int FI,
      50             :                              unsigned &FrameReg) const override;
      51             :   int ResolveFrameIndexReference(const MachineFunction &MF, int FI,
      52             :                                  unsigned &FrameReg, int SPAdj) const;
      53             : 
      54             :   void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
      55             :                             RegScavenger *RS) const override;
      56             : 
      57             :   void adjustForSegmentedStacks(MachineFunction &MF,
      58             :                                 MachineBasicBlock &MBB) const override;
      59             : 
      60             :   /// Returns true if the target will correctly handle shrink wrapping.
      61        9872 :   bool enableShrinkWrapping(const MachineFunction &MF) const override {
      62        9872 :     return true;
      63             :   }
      64             : 
      65             :  private:
      66             :   void emitPushInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
      67             :                     const std::vector<CalleeSavedInfo> &CSI, unsigned StmOpc,
      68             :                     unsigned StrOpc, bool NoGap,
      69             :                     bool(*Func)(unsigned, bool), unsigned NumAlignedDPRCS2Regs,
      70             :                     unsigned MIFlags = 0) const;
      71             :   void emitPopInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
      72             :                    std::vector<CalleeSavedInfo> &CSI, unsigned LdmOpc,
      73             :                    unsigned LdrOpc, bool isVarArg, bool NoGap,
      74             :                    bool(*Func)(unsigned, bool),
      75             :                    unsigned NumAlignedDPRCS2Regs) const;
      76             : 
      77             :   MachineBasicBlock::iterator
      78             :   eliminateCallFramePseudoInstr(MachineFunction &MF,
      79             :                                 MachineBasicBlock &MBB,
      80             :                                 MachineBasicBlock::iterator MI) const override;
      81             : };
      82             : 
      83             : } // End llvm namespace
      84             : 
      85             : #endif

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