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
63