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
35     spillCalleeSavedRegisters(MachineBasicBlock &MBB,
36                               MachineBasicBlock::iterator MI,
37                               ArrayRef<CalleeSavedInfo> CSI,
38                               const TargetRegisterInfo *TRI) const override;
39     bool
40     restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
41                                 MachineBasicBlock::iterator MI,
42                                 MutableArrayRef<CalleeSavedInfo> CSI,
43                                 const TargetRegisterInfo *TRI) const override;
44 
45     MachineBasicBlock::iterator
46     eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
47                                   MachineBasicBlock::iterator I) const override;
48 
49     bool hasFP(const MachineFunction &MF) const override;
50 
51     void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
52                               RegScavenger *RS = nullptr) const override;
53 
54     void processFunctionBeforeFrameFinalized(MachineFunction &MF,
55                                      RegScavenger *RS = nullptr) const override;
56 
57     //! Stack slot size (4 bytes)
stackSlotSize()58     static int stackSlotSize() {
59       return 4;
60     }
61   };
62 }
63 
64 #endif
65