1 //==- SystemZMachineFuctionInfo.h - SystemZ machine function info -*- 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 #ifndef SYSTEMZMACHINEFUNCTIONINFO_H
11 #define SYSTEMZMACHINEFUNCTIONINFO_H
12 
13 #include "llvm/CodeGen/MachineFunction.h"
14 
15 namespace llvm {
16 
17 class SystemZMachineFunctionInfo : public MachineFunctionInfo {
18   unsigned SavedGPRFrameSize;
19   unsigned LowSavedGPR;
20   unsigned HighSavedGPR;
21   unsigned VarArgsFirstGPR;
22   unsigned VarArgsFirstFPR;
23   unsigned VarArgsFrameIndex;
24   unsigned RegSaveFrameIndex;
25   bool ManipulatesSP;
26 
27 public:
28   explicit SystemZMachineFunctionInfo(MachineFunction &MF)
29     : SavedGPRFrameSize(0), LowSavedGPR(0), HighSavedGPR(0), VarArgsFirstGPR(0),
30       VarArgsFirstFPR(0), VarArgsFrameIndex(0), RegSaveFrameIndex(0),
31       ManipulatesSP(false) {}
32 
33   // Get and set the number of bytes allocated by generic code to store
34   // call-saved GPRs.
35   unsigned getSavedGPRFrameSize() const { return SavedGPRFrameSize; }
36   void setSavedGPRFrameSize(unsigned bytes) { SavedGPRFrameSize = bytes; }
37 
38   // Get and set the first call-saved GPR that should be saved and restored
39   // by this function.  This is 0 if no GPRs need to be saved or restored.
40   unsigned getLowSavedGPR() const { return LowSavedGPR; }
41   void setLowSavedGPR(unsigned Reg) { LowSavedGPR = Reg; }
42 
43   // Get and set the last call-saved GPR that should be saved and restored
44   // by this function.
45   unsigned getHighSavedGPR() const { return HighSavedGPR; }
46   void setHighSavedGPR(unsigned Reg) { HighSavedGPR = Reg; }
47 
48   // Get and set the number of fixed (as opposed to variable) arguments
49   // that are passed in GPRs to this function.
50   unsigned getVarArgsFirstGPR() const { return VarArgsFirstGPR; }
51   void setVarArgsFirstGPR(unsigned GPR) { VarArgsFirstGPR = GPR; }
52 
53   // Likewise FPRs.
54   unsigned getVarArgsFirstFPR() const { return VarArgsFirstFPR; }
55   void setVarArgsFirstFPR(unsigned FPR) { VarArgsFirstFPR = FPR; }
56 
57   // Get and set the frame index of the first stack vararg.
58   unsigned getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
59   void setVarArgsFrameIndex(unsigned FI) { VarArgsFrameIndex = FI; }
60 
61   // Get and set the frame index of the register save area
62   // (i.e. the incoming stack pointer).
63   unsigned getRegSaveFrameIndex() const { return RegSaveFrameIndex; }
64   void setRegSaveFrameIndex(unsigned FI) { RegSaveFrameIndex = FI; }
65 
66   // Get and set whether the function directly manipulates the stack pointer,
67   // e.g. through STACKSAVE or STACKRESTORE.
68   bool getManipulatesSP() const { return ManipulatesSP; }
69   void setManipulatesSP(bool MSP) { ManipulatesSP = MSP; }
70 };
71 
72 } // end llvm namespace
73 
74 #endif
75