lib/Target/XCore/XCoreFrameLowering.h

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