ARM stm/ldm instructions require more than one register in the register list.
[oota-llvm.git] / lib / Target / ARM / ARMFrameInfo.h
1 //===-- ARMTargetFrameInfo.h - Define TargetFrameInfo for ARM ---*- 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 //
11 //
12 //===----------------------------------------------------------------------===//
13
14 #ifndef ARM_FRAMEINFO_H
15 #define ARM_FRAMEINFO_H
16
17 #include "ARM.h"
18 #include "ARMSubtarget.h"
19 #include "llvm/Target/TargetFrameInfo.h"
20
21 namespace llvm {
22   class ARMSubtarget;
23
24 class ARMFrameInfo : public TargetFrameInfo {
25 protected:
26   const ARMSubtarget &STI;
27
28 public:
29   explicit ARMFrameInfo(const ARMSubtarget &sti)
30     : TargetFrameInfo(StackGrowsDown, sti.getStackAlignment(), 0, 4), STI(sti) {
31   }
32
33   /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
34   /// the function.
35   void emitPrologue(MachineFunction &MF) const;
36   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
37
38   bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
39                                  MachineBasicBlock::iterator MI,
40                                  const std::vector<CalleeSavedInfo> &CSI,
41                                  const TargetRegisterInfo *TRI) const;
42
43   bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
44                                    MachineBasicBlock::iterator MI,
45                                    const std::vector<CalleeSavedInfo> &CSI,
46                                    const TargetRegisterInfo *TRI) const;
47
48   bool hasFP(const MachineFunction &MF) const;
49   bool hasReservedCallFrame(const MachineFunction &MF) const;
50   bool canSimplifyCallFramePseudos(const MachineFunction &MF) const;
51   int getFrameIndexReference(const MachineFunction &MF, int FI,
52                              unsigned &FrameReg) const;
53   int ResolveFrameIndexReference(const MachineFunction &MF, int FI,
54                                  unsigned &FrameReg, int SPAdj) const;
55   int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
56
57   void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
58                                             RegScavenger *RS) const;
59
60  private:
61   void emitPushInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
62                     const std::vector<CalleeSavedInfo> &CSI, unsigned StmOpc,
63                     unsigned StrOpc, bool NoGap,
64                     bool(*Func)(unsigned, bool)) const;
65   void emitPopInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
66                    const std::vector<CalleeSavedInfo> &CSI, unsigned LdmOpc,
67                    unsigned LdrOpc, bool isVarArg, bool NoGap,
68                    bool(*Func)(unsigned, bool)) const;
69 };
70
71 } // End llvm namespace
72
73 #endif