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      1 //===-- XCoreFrameLowering.h - Frame info for XCore Target ------*- 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 // This file contains XCore frame information that doesn't fit anywhere else
     11 // cleanly...
     12 //
     13 //===----------------------------------------------------------------------===//
     14 
     15 #ifndef LLVM_LIB_TARGET_XCORE_XCOREFRAMELOWERING_H
     16 #define LLVM_LIB_TARGET_XCORE_XCOREFRAMELOWERING_H
     17 
     18 #include "llvm/Target/TargetFrameLowering.h"
     19 #include "llvm/Target/TargetMachine.h"
     20 
     21 namespace llvm {
     22   class XCoreSubtarget;
     23 
     24   class XCoreFrameLowering: public TargetFrameLowering {
     25   public:
     26     XCoreFrameLowering(const XCoreSubtarget &STI);
     27 
     28     /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
     29     /// the function.
     30     void emitPrologue(MachineFunction &MF,
     31                       MachineBasicBlock &MBB) const override;
     32     void emitEpilogue(MachineFunction &MF,
     33                       MachineBasicBlock &MBB) const override;
     34 
     35     bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
     36                                   MachineBasicBlock::iterator MI,
     37                                   const std::vector<CalleeSavedInfo> &CSI,
     38                                   const TargetRegisterInfo *TRI) const override;
     39     bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
     40                                   MachineBasicBlock::iterator MI,
     41                                   const std::vector<CalleeSavedInfo> &CSI,
     42                                   const TargetRegisterInfo *TRI) const override;
     43 
     44     MachineBasicBlock::iterator
     45     eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
     46                                   MachineBasicBlock::iterator I) const override;
     47 
     48     bool hasFP(const MachineFunction &MF) const override;
     49 
     50     void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
     51                               RegScavenger *RS = nullptr) const override;
     52 
     53     void processFunctionBeforeFrameFinalized(MachineFunction &MF,
     54                                      RegScavenger *RS = nullptr) const override;
     55 
     56     //! Stack slot size (4 bytes)
     57     static int stackSlotSize() {
     58       return 4;
     59     }
     60   };
     61 }
     62 
     63 #endif
     64