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 XCOREFRAMEINFO_H
16 #define XCOREFRAMEINFO_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     const XCoreSubtarget &STI;
26   public:
27     XCoreFrameLowering(const XCoreSubtarget &STI);
28 
29     /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
30     /// the function.
31     void emitPrologue(MachineFunction &MF) const;
32     void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
33 
34     bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
35                                    MachineBasicBlock::iterator MI,
36                                    const std::vector<CalleeSavedInfo> &CSI,
37                                    const TargetRegisterInfo *TRI) const;
38     bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
39                                      MachineBasicBlock::iterator MI,
40                                      const std::vector<CalleeSavedInfo> &CSI,
41                                      const TargetRegisterInfo *TRI) const;
42 
43     bool hasFP(const MachineFunction &MF) const;
44 
45     void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
46                                               RegScavenger *RS = NULL) const;
47 
48     void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
49 
50     //! Stack slot size (4 bytes)
51     static int stackSlotSize() {
52       return 4;
53     }
54   };
55 }
56 
57 #endif // XCOREFRAMEINFO_H
58